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Qu T, Zhao X, Yan S, Liu Y, Ameer MJ, Zhao L. Interruption after Short-Term Nitrogen Additions Improves Ecological Stability of Larix olgensis Forest Soil by Affecting Bacterial Communities. Microorganisms 2024; 12:969. [PMID: 38792798 DOI: 10.3390/microorganisms12050969] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2024] [Revised: 05/05/2024] [Accepted: 05/09/2024] [Indexed: 05/26/2024] Open
Abstract
Atmospheric nitrogen deposition can alter soil microbial communities and further impact the structure and function of forest ecosystems. However, most studies are focused on positive or negative effects after nitrogen addition, and few studies pay attention to its interruption. In order to investigate whether interruption after different levels of short-term N additions still benefit soil health, we conducted a 2-year interruption after a 4-year short-term nitrogen addition (10 and 20 kg N·hm-2·yr-1) experiment; then, we compared soil microbial diversity and structure and analyzed soil physicochemical properties and their correlations before and after the interruption in Larix olgensis forest soil in northeast China. The results showed that soil ecological stabilization of Larix olgensis forest further improved after the interruption compared to pre-interruption. The TN, C:P, N:P, and C:N:P ratios increased significantly regardless of the previous nitrogen addition concentration, and soil nutrient cycling was further promoted. The relative abundance of the original beneficial microbial taxa Gemmatimonas, Sphingomonas, and Pseudolabrys increased; new beneficial bacteria Ellin6067, Massilia, Solirubrobacter, and Bradyrhizobium appeared, and the species of beneficial soil microorganisms were further improved. The results of this study elucidated the dynamics of the bacterial community before and after the interruption of short-term nitrogen addition and could provide data support and a reference basis for forest ecosystem restoration strategies and management under the background of global nitrogen deposition.
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Affiliation(s)
- Tongbao Qu
- College of Forestry and Grassland, Jilin Agricultural University, Changchun 130118, China
| | - Xiaoting Zhao
- College of Forestry and Grassland, Jilin Agricultural University, Changchun 130118, China
| | - Siyu Yan
- College of Forestry and Grassland, Jilin Agricultural University, Changchun 130118, China
| | - Yushan Liu
- College of Forestry and Grassland, Jilin Agricultural University, Changchun 130118, China
| | - Muhammad Jamal Ameer
- College of Forestry and Grassland, Jilin Agricultural University, Changchun 130118, China
| | - Lei Zhao
- College of Forestry and Grassland, Jilin Agricultural University, Changchun 130118, China
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Yang L, Canarini A, Zhang W, Lang M, Chen Y, Cui Z, Kuzyakov Y, Richter A, Chen X, Zhang F, Tian J. Microbial life-history strategies mediate microbial carbon pump efficacy in response to N management depending on stoichiometry of microbial demand. Glob Chang Biol 2024; 30:e17311. [PMID: 38742695 DOI: 10.1111/gcb.17311] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/17/2023] [Revised: 03/22/2024] [Accepted: 04/16/2024] [Indexed: 05/16/2024]
Abstract
The soil microbial carbon pump (MCP) is increasingly acknowledged as being directly linked to soil organic carbon (SOC) accumulation and stability. Given the close coupling of carbon (C) and nitrogen (N) cycles and the constraints imposed by their stoichiometry on microbial growth, N addition might affect microbial growth strategies with potential consequences for necromass formation and carbon stability. However, this topic remains largely unexplored. Based on two multi-level N fertilizer experiments over 10 years in two soils with contrasting soil fertility located in the North (Cambisol, carbon-poor) and Southwest (Luvisol, carbon-rich), we hypothesized that different resource demands of microorganism elicit a trade-off in microbial growth potential (Y-strategy) and resource-acquisition (A-strategy) in response to N addition, and consequently on necromass formation and soil carbon stability. We combined measurements of necromass metrics (MCP efficacy) and soil carbon stability (chemical composition and mineral associated organic carbon) with potential changes in microbial life history strategies (assessed via soil metagenomes and enzymatic activity analyses). The contribution of microbial necromass to SOC decreased with N addition in the Cambisol, but increased in the Luvisol. Soil microbial life strategies displayed two distinct responses in two soils after N amendment: shift toward A-strategy (Cambisol) or Y-strategy (Luvisol). These divergent responses are owing to the stoichiometric imbalance between microbial demands and resource availability for C and N, which presented very distinct patterns in the two soils. The partial correlation analysis further confirmed that high N addition aggravated stoichiometric carbon demand, shifting the microbial community strategy toward resource-acquisition which reduced carbon stability in Cambisol. In contrast, the microbial Y-strategy had the positive direct effect on MCP efficacy in Luvisol, which greatly enhanced carbon stability. Such findings provide mechanistic insights into the stoichiometric regulation of MCP efficacy, and how this is mediated by site-specific trade-offs in microbial life strategies, which contribute to improving our comprehension of soil microbial C sequestration and potential optimization of agricultural N management.
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Affiliation(s)
- Liyang Yang
- State Key Laboratory of Nutrient Use and Management, College of Resources and Environmental Sciences, China Agricultural University, Beijing, China
| | - Alberto Canarini
- Centre for Microbiology and Environmental Systems Science, University of Vienna, Vienna, Austria
| | - Wushuai Zhang
- College of Resources and Environment, Academy of Agricultural Science, Interdisciplinary Research Center for Agriculture Green Development in Yangtze River Basin, Southwest University, Chongqing, China
| | - Ming Lang
- College of Resources and Environment, Academy of Agricultural Science, Interdisciplinary Research Center for Agriculture Green Development in Yangtze River Basin, Southwest University, Chongqing, China
| | - Yuanxue Chen
- College of Resources and Environment, Sichuan Agricultural University, Chengdu, China
| | - Zhenling Cui
- State Key Laboratory of Nutrient Use and Management, College of Resources and Environmental Sciences, China Agricultural University, Beijing, China
| | - Yakov Kuzyakov
- Department of Soil Science of Temperate Ecosystems, University of Göttingen, Göttingen, Germany
| | - Andreas Richter
- Centre for Microbiology and Environmental Systems Science, University of Vienna, Vienna, Austria
| | - Xinping Chen
- College of Resources and Environment, Academy of Agricultural Science, Interdisciplinary Research Center for Agriculture Green Development in Yangtze River Basin, Southwest University, Chongqing, China
| | - Fusuo Zhang
- State Key Laboratory of Nutrient Use and Management, College of Resources and Environmental Sciences, China Agricultural University, Beijing, China
| | - Jing Tian
- State Key Laboratory of Nutrient Use and Management, College of Resources and Environmental Sciences, China Agricultural University, Beijing, China
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Liu C, Liu J, Wang J, Ding X. Effects of Short-Term Nitrogen Additions on Biomass and Soil Phytochemical Cycling in Alpine Grasslands of Tianshan, China. Plants (Basel) 2024; 13:1103. [PMID: 38674511 PMCID: PMC11054463 DOI: 10.3390/plants13081103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2024] [Revised: 04/08/2024] [Accepted: 04/09/2024] [Indexed: 04/28/2024]
Abstract
The nitrogen deposition process, as an important phenomenon of global climate change and an important link in the nitrogen cycle, has had serious and far-reaching impacts on grassland ecosystems. This study aimed to investigate the survival adaptation strategies of plants of different functional groups under nitrogen deposition, and the study identified the following outcomes of differences in biomass changes by conducting in situ simulated nitrogen deposition experiments while integrating plant nutrient contents and soil physicochemical properties: (1) nitrogen addition enhanced the aboveground biomass of grassland communities, in which Poaceae were significantly affected by nitrogen addition. Additionally, nitrogen addition significantly influenced plant total nitrogen and total phosphorus; (2) nitrogen addition improved the plant growth environment, alleviated plant nitrogen limitation, and promoted plant phosphorus uptake; and (3) there was variability in the biomass responses of different functional groups to nitrogen addition. The level of nitrogen addition was the primary factor affecting differences in biomass changes, while nitrogen addition frequency was an important factor affecting changes in plant community structure.
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Affiliation(s)
- Chao Liu
- College of Ecology and Environment, Xinjiang University, Urumqi 830017, China; (C.L.); (J.W.); (X.D.)
- Technology Innovation Center for Ecological Monitoring and Restoration of Desert-Oasis, Ministry of Natural Resources Desert, Urumqi 830002, China
- Key Laboratory of Oasis Ecology, Ministry of Education (Xinjiang University), Urumqi 830017, China
| | - Junjie Liu
- College of Ecology and Environment, Xinjiang University, Urumqi 830017, China; (C.L.); (J.W.); (X.D.)
- Technology Innovation Center for Ecological Monitoring and Restoration of Desert-Oasis, Ministry of Natural Resources Desert, Urumqi 830002, China
- Key Laboratory of Oasis Ecology, Ministry of Education (Xinjiang University), Urumqi 830017, China
| | - Juan Wang
- College of Ecology and Environment, Xinjiang University, Urumqi 830017, China; (C.L.); (J.W.); (X.D.)
- Technology Innovation Center for Ecological Monitoring and Restoration of Desert-Oasis, Ministry of Natural Resources Desert, Urumqi 830002, China
- Key Laboratory of Oasis Ecology, Ministry of Education (Xinjiang University), Urumqi 830017, China
| | - Xiaoyu Ding
- College of Ecology and Environment, Xinjiang University, Urumqi 830017, China; (C.L.); (J.W.); (X.D.)
- Technology Innovation Center for Ecological Monitoring and Restoration of Desert-Oasis, Ministry of Natural Resources Desert, Urumqi 830002, China
- Key Laboratory of Oasis Ecology, Ministry of Education (Xinjiang University), Urumqi 830017, China
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Houle D, Moore JD, Renaudin M. Eastern Canadian boreal forest soil and foliar chemistry show evidence of resilience to long-term nitrogen addition. Ecol Appl 2024; 34:e2958. [PMID: 38425036 DOI: 10.1002/eap.2958] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2023] [Revised: 11/23/2023] [Accepted: 01/10/2024] [Indexed: 03/02/2024]
Abstract
The boreal forest is one of the world's largest terrestrial biome and plays crucial roles in global biogeochemical cycles, such as carbon (C) sequestration in vegetation and soil. However, the impacts of decades of N deposition on N-limited ecosystems, like the eastern Canadian boreal forest, remain unclear. For 13 years, N deposition was simulated by periodically adding ammonium nitrate on soils of two boreal coniferous forests (i.e., balsam fir and black spruce) of eastern Canada, at low (LN) and high (HN) rates, corresponding to 3 and 10 times the ambient N deposition, respectively. We show that more than a decade of N addition had no strong effects on mineral soil C, N, P, and cation concentrations and on foliar total Ca, K, Mg, and Mn concentrations. In organic soil, C stock was not affected by N addition while N stock increased, and exchangeable Ca2+ and Mg2+ decreased at the balsam fir site under HN treatment. At both sites, LN treatment had nearly no impact on foliage and soil chemistry but foliar N and N:P significantly increased under HN treatment, potentially leading to foliar nutrient imbalance. Overall, our work indicates that, in the eastern Canadian boreal forest, soil and foliar nutrient concentrations and stocks are resilient to increasing N deposition potentially because, in the context of N limitation, extra N would be rapidly immobilized by soil micro-organisms and vegetation. These findings could improve modeling future boreal forest soil C stocks and biomass growth and could help in planning forest management strategies in eastern Canada.
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Affiliation(s)
- Daniel Houle
- Science and Technology Branch, Environment and Climate Change Canada, Montréal, Québec, Canada
- Département des Sciences Biologiques, Université du Québec à Montréal, Montréal, Québec, Canada
| | - Jean-David Moore
- Direction de la recherche forestière, Ministère des Ressources naturelles et des Forêts, Québec City, Québec, Canada
| | - Marie Renaudin
- Science and Technology Branch, Environment and Climate Change Canada, Montréal, Québec, Canada
- Département des Sciences Biologiques, Université du Québec à Montréal, Montréal, Québec, Canada
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Daniel C, Allan E, Saiz H, Godoy O. Fast-slow traits predict competition network structure and its response to resources and enemies. Ecol Lett 2024; 27:e14425. [PMID: 38577899 DOI: 10.1111/ele.14425] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2023] [Revised: 03/12/2024] [Accepted: 03/12/2024] [Indexed: 04/06/2024]
Abstract
Plants interact in complex networks but how network structure depends on resources, natural enemies and species resource-use strategy remains poorly understood. Here, we quantified competition networks among 18 plants varying in fast-slow strategy, by testing how increased nutrient availability and reduced foliar pathogens affected intra- and inter-specific interactions. Our results show that nitrogen and pathogens altered several aspects of network structure, often in unexpected ways due to fast and slow growing species responding differently. Nitrogen addition increased competition asymmetry in slow growing networks, as expected, but decreased it in fast growing networks. Pathogen reduction made networks more even and less skewed because pathogens targeted weaker competitors. Surprisingly, pathogens and nitrogen dampened each other's effect. Our results show that plant growth strategy is key to understand how competition respond to resources and enemies, a prediction from classic theories which has rarely been tested by linking functional traits to competition networks.
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Affiliation(s)
- Caroline Daniel
- Institute for Plant Sciences (IPS), Bern University, Bern, Switzerland
| | - Eric Allan
- Institute for Plant Sciences (IPS), Bern University, Bern, Switzerland
- Centre for Development and Environment, University of Bern, Bern, Switzerland
| | - Hugo Saiz
- Institute for Plant Sciences (IPS), Bern University, Bern, Switzerland
- Departamento de Ciencias Agrarias y Medio Natural, Escuela Politécnica Superior, Instituto Universitario de Investigación en Ciencias Ambientales de Aragón (IUCA), Universidad de Zaragoza, Huesca, Spain
| | - Oscar Godoy
- Departamento de Biología, Instituto Universitario de Investigación Marina (INMAR), Universidad de Cádiz, Puerto Real, Spain
- Estación Biológica de Doñana, EBD-CSIC, Sevilla, Spain
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Jin X, Zhu J, Wei X, Xiao Q, Xiao J, Jiang L, Xu D, Shen C, Liu J, He Z. Adaptation Strategies of Seedling Root Response to Nitrogen and Phosphorus Addition. Plants (Basel) 2024; 13:536. [PMID: 38498541 PMCID: PMC10892864 DOI: 10.3390/plants13040536] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/16/2024] [Revised: 02/11/2024] [Accepted: 02/12/2024] [Indexed: 03/20/2024]
Abstract
The escalation of global nitrogen deposition levels has heightened the inhibitory impact of phosphorus limitation on plant growth in subtropical forests. Plant roots area particularly sensitive tissue to nitrogen and phosphorus elements. Changes in the morphological characteristics of plant roots signify alterations in adaptive strategies. However, our understanding of resource-use strategies of roots in this environment remains limited. In this study, we conducted a 10-month experiment at the Castanopsis kawakamii Nature Reserve to evaluate the response of traits of seedling roots (such as specific root length, average diameter, nitrogen content, and phosphorus content) to nitrogen and phosphorus addition. The aim was to reveal the adaptation strategies of roots in different nitrogen and phosphorus addition concentrations. The results showed that: (1) The single phosphorus and nitrogen-phosphorus interaction addition increased the specific root length, surface area, and root phosphorus content. In addition, single nitrogen addition promotes an increase in the average root diameter. (2) Non-nitrogen phosphorus addition and single nitrogen addition tended to adopt a conservative resource-use strategy to maintain growth under low phosphorus conditions. (3) Under the single phosphorus addition and interactive addition of phosphorus and nitrogen, the roots adopted an acquisitive resource-use strategy to obtain more available phosphorus resources. Accordingly, the adaptation strategy of seedling roots can be regulated by adding appropriate concentrations of nitrogen or phosphorus, thereby promoting the natural regeneration of subtropical forests.
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Affiliation(s)
- Xing Jin
- College of Forestry, Fujian Agriculture and Forestry University, Fuzhou 350002, China; (X.J.); (J.Z.); (X.W.); (Q.X.); (J.X.); (L.J.); (D.X.)
- Key Laboratory of Ecology and Resource Statistics in Fujian Province, Fuzhou 350002, China
| | - Jing Zhu
- College of Forestry, Fujian Agriculture and Forestry University, Fuzhou 350002, China; (X.J.); (J.Z.); (X.W.); (Q.X.); (J.X.); (L.J.); (D.X.)
- Key Laboratory of Ecology and Resource Statistics in Fujian Province, Fuzhou 350002, China
| | - Xin Wei
- College of Forestry, Fujian Agriculture and Forestry University, Fuzhou 350002, China; (X.J.); (J.Z.); (X.W.); (Q.X.); (J.X.); (L.J.); (D.X.)
- Key Laboratory of Ecology and Resource Statistics in Fujian Province, Fuzhou 350002, China
| | - Qianru Xiao
- College of Forestry, Fujian Agriculture and Forestry University, Fuzhou 350002, China; (X.J.); (J.Z.); (X.W.); (Q.X.); (J.X.); (L.J.); (D.X.)
- Key Laboratory of Ecology and Resource Statistics in Fujian Province, Fuzhou 350002, China
| | - Jingyu Xiao
- College of Forestry, Fujian Agriculture and Forestry University, Fuzhou 350002, China; (X.J.); (J.Z.); (X.W.); (Q.X.); (J.X.); (L.J.); (D.X.)
- Key Laboratory of Ecology and Resource Statistics in Fujian Province, Fuzhou 350002, China
| | - Lan Jiang
- College of Forestry, Fujian Agriculture and Forestry University, Fuzhou 350002, China; (X.J.); (J.Z.); (X.W.); (Q.X.); (J.X.); (L.J.); (D.X.)
- Key Laboratory of Ecology and Resource Statistics in Fujian Province, Fuzhou 350002, China
| | - Daowei Xu
- College of Forestry, Fujian Agriculture and Forestry University, Fuzhou 350002, China; (X.J.); (J.Z.); (X.W.); (Q.X.); (J.X.); (L.J.); (D.X.)
- Key Laboratory of Ecology and Resource Statistics in Fujian Province, Fuzhou 350002, China
| | - Caixia Shen
- School of Economics and Management, Sanming University, Sanming 365000, China;
| | - Jinfu Liu
- College of Forestry, Fujian Agriculture and Forestry University, Fuzhou 350002, China; (X.J.); (J.Z.); (X.W.); (Q.X.); (J.X.); (L.J.); (D.X.)
- Key Laboratory of Ecology and Resource Statistics in Fujian Province, Fuzhou 350002, China
| | - Zhongsheng He
- College of Forestry, Fujian Agriculture and Forestry University, Fuzhou 350002, China; (X.J.); (J.Z.); (X.W.); (Q.X.); (J.X.); (L.J.); (D.X.)
- Key Laboratory of Ecology and Resource Statistics in Fujian Province, Fuzhou 350002, China
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Xu X, Yang L, Shen K, Cao H, Lin Y, Liu J, Han W. Nitrogen Addition and Heterotroph Exclusion Affected Plant Species Diversity-Biomass Relationship by Affecting Plant Functional Traits. Plants (Basel) 2024; 13:258. [PMID: 38256811 PMCID: PMC10818353 DOI: 10.3390/plants13020258] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2023] [Revised: 01/03/2024] [Accepted: 01/11/2024] [Indexed: 01/24/2024]
Abstract
(1) Background: Heterotrophs can affect plant biomass and alter species diversity-productivity relationships. However, these studies were conducted in systems with a low nitrogen (N) availability, and it is unclear how heterotroph removal affects the relationship between plant species diversity and productivity in different N habitats. (2) Methods: Three typical understory herbaceous plants were selected to assemble the plant species diversity (three plant species richness levels (1, 2, and 3) and seven plant species compositions), and the control, insecticide, fungicide, and all removal treatments were performed at each plant species diversity level in systems with or without N addition treatments. (3) Results: In systems without N addition, the insecticide treatment increased the plant aboveground biomass, total biomass, and leaf area, while the fungicide treatment reduced the plant belowground biomass, root length, and root tip number; the presence of Bidens pilosa increased the plant aboveground biomass. Similarly, the presence of Bletilla striata increased the plant belowground biomass and root diameter under each heterotroph removal treatment. In systems with N addition, all removal treatments reduced the plant belowground biomass and increased the plant leaf area; the presence of B. pilosa significantly increased the plant aboveground biomass, total biomass, and root length under each heterotroph removal treatment. The presence of B. striata significantly increased the plant belowground biomass and leaf area under insecticide and fungicide treatments. (4) Conclusions: Heterotroph removal alters the plant species diversity-biomass relationship by affecting the plant functional traits in systems with different N availabilities. The impact of biodiversity at different trophic levels on ecosystem functioning should be considered under the background of global change.
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Affiliation(s)
- Xile Xu
- College of Life and Environmental Science, Wenzhou University, Wenzhou 325035, China; (X.X.); (L.Y.); (K.S.); (H.C.); (Y.L.); (J.L.)
| | - Luping Yang
- College of Life and Environmental Science, Wenzhou University, Wenzhou 325035, China; (X.X.); (L.Y.); (K.S.); (H.C.); (Y.L.); (J.L.)
| | - Kai Shen
- College of Life and Environmental Science, Wenzhou University, Wenzhou 325035, China; (X.X.); (L.Y.); (K.S.); (H.C.); (Y.L.); (J.L.)
| | - Huijuan Cao
- College of Life and Environmental Science, Wenzhou University, Wenzhou 325035, China; (X.X.); (L.Y.); (K.S.); (H.C.); (Y.L.); (J.L.)
| | - Yishi Lin
- College of Life and Environmental Science, Wenzhou University, Wenzhou 325035, China; (X.X.); (L.Y.); (K.S.); (H.C.); (Y.L.); (J.L.)
| | - Jinliang Liu
- College of Life and Environmental Science, Wenzhou University, Wenzhou 325035, China; (X.X.); (L.Y.); (K.S.); (H.C.); (Y.L.); (J.L.)
- Zhejiang Provincial Key Laboratory for Water Environment and Marine Biological Resources Protection, Wenzhou University, Wenzhou 325035, China
| | - Wenjuan Han
- College of Life and Environmental Science, Wenzhou University, Wenzhou 325035, China; (X.X.); (L.Y.); (K.S.); (H.C.); (Y.L.); (J.L.)
- Zhejiang Provincial Key Laboratory for Water Environment and Marine Biological Resources Protection, Wenzhou University, Wenzhou 325035, China
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Ren J, Wang C, Wang Q, Song W, Sun W. Nitrogen addition regulates the effects of variation in precipitation patterns on plant biomass formation and allocation in a Leymus chinensis grassland of northeast China. Front Plant Sci 2024; 14:1323766. [PMID: 38283970 PMCID: PMC10810989 DOI: 10.3389/fpls.2023.1323766] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/20/2023] [Accepted: 12/20/2023] [Indexed: 01/30/2024]
Abstract
Global warming is predicted to change precipitation amount and reduce precipitation frequency, which may alter grassland primary productivity and biomass allocation, especially when interact with other global change factors, such as nitrogen deposition. The interactive effects of changes in precipitation amount and nitrogen addition on productivity and biomass allocation are extensively studied; however, how these effects may be regulated by the predicted reduction in precipitation frequency remain largely unknown. Using a mesocosm experiment, we investigated responses of primary productivity and biomass allocation to the manipulated changes in precipitation amount (PA: 150 mm, 300 mm, 450 mm), precipitation frequency (PF: medium and low), and nitrogen addition (NA: 0 and 10 g N m-2 yr-1) in a Leymus chinensis grassland. We detected significant effects of the PA, PF and NA treatments on both aboveground biomass (AGB) and belowground biomass (BGB); but the interactive effects were only significant between the PA and NA on AGB. Both AGB and BGB increased with an increment in precipitation amount and nitrogen addition; the reduction in PF decreased AGB, but increased BGB. The reduced PF treatment induced an enhancement in the variation of soil moisture, which subsequently affected photosynthesis and biomass formation. Overall, there were mismatches in the above- and belowground biomass responses to changes in precipitation regime. Our results suggest the predicted changes in precipitation regime, including precipitation amount and frequency, is likely to alter primary productivity and biomass allocation, especially when interact with nitrogen deposition. Therefore, predicting the influence of global changes on grassland structure and functions requires the consideration of interactions among multiple global change factors.
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Affiliation(s)
- Jianli Ren
- Institute of Grassland Science, Key Laboratory of Vegetation Ecology of the Ministry of Education, Jilin Songnen Grassland Ecosystem National Observation and Research Station, Northeast Normal University, Changchun, Jilin, China
- Institute of Resources and Ecology, Yili Normal University, Yining, Xinjiang, China
- School of Resources and Environment, Yili Normal University, Yining, Xinjiang, China
| | - Chengliang Wang
- Institute of Grassland Science, Key Laboratory of Vegetation Ecology of the Ministry of Education, Jilin Songnen Grassland Ecosystem National Observation and Research Station, Northeast Normal University, Changchun, Jilin, China
| | - Qiaoxin Wang
- Institute of Grassland Science, Key Laboratory of Vegetation Ecology of the Ministry of Education, Jilin Songnen Grassland Ecosystem National Observation and Research Station, Northeast Normal University, Changchun, Jilin, China
| | - Wenzheng Song
- Institute of Grassland Science, Key Laboratory of Vegetation Ecology of the Ministry of Education, Jilin Songnen Grassland Ecosystem National Observation and Research Station, Northeast Normal University, Changchun, Jilin, China
- College of Tourism, Resources and Environment, Zaozhuang University, Zaozhuang, China
| | - Wei Sun
- Institute of Grassland Science, Key Laboratory of Vegetation Ecology of the Ministry of Education, Jilin Songnen Grassland Ecosystem National Observation and Research Station, Northeast Normal University, Changchun, Jilin, China
- State Environmental Protection Key Laboratory of Wetland Ecology and Vegetation Restoration, Northeast Normal University, Changchun, Jilin, China
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Zhang Y, Cheng X, van Groenigen KJ, García-Palacios P, Cao J, Zheng X, Luo Y, Hungate BA, Terrer C, Butterbach-Bahl K, Olesen JE, Chen J. Shifts in soil ammonia-oxidizing community maintain the nitrogen stimulation of nitrification across climatic conditions. Glob Chang Biol 2024; 30:e16989. [PMID: 37888833 DOI: 10.1111/gcb.16989] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2023] [Revised: 10/01/2023] [Accepted: 10/04/2023] [Indexed: 10/28/2023]
Abstract
Anthropogenic nitrogen (N) loading alters soil ammonia-oxidizing archaea (AOA) and bacteria (AOB) abundances, likely leading to substantial changes in soil nitrification. However, the factors and mechanisms determining the responses of soil AOA:AOB and nitrification to N loading are still unclear, making it difficult to predict future changes in soil nitrification. Herein, we synthesize 68 field studies around the world to evaluate the impacts of N loading on soil ammonia oxidizers and nitrification. Across a wide range of biotic and abiotic factors, climate is the most important driver of the responses of AOA:AOB to N loading. Climate does not directly affect the N-stimulation of nitrification, but does so via climate-related shifts in AOA:AOB. Specifically, climate modulates the responses of AOA:AOB to N loading by affecting soil pH, N-availability and moisture. AOB play a dominant role in affecting nitrification in dry climates, while the impacts from AOA can exceed AOB in humid climates. Together, these results suggest that climate-related shifts in soil ammonia-oxidizing community maintain the N-stimulation of nitrification, highlighting the importance of microbial community composition in mediating the responses of the soil N cycle to N loading.
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Affiliation(s)
- Yong Zhang
- Key Laboratory of Soil Ecology and Health in Universities of Yunnan Province, School of Ecology and Environmental Science, Yunnan University, Kunming, China
- State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, China
| | - Xiaoli Cheng
- Key Laboratory of Soil Ecology and Health in Universities of Yunnan Province, School of Ecology and Environmental Science, Yunnan University, Kunming, China
| | - Kees Jan van Groenigen
- Department of Geography, Faculty of Environment, Science and Economy, University of Exeter, Exeter, UK
| | - Pablo García-Palacios
- Instituto de Ciencias Agrarias, Consejo Superior de Investigaciones Científicas, Madrid, Spain
- Department of Plant and Microbial Biology, University of Zurich, Zurich, Switzerland
| | - Junji Cao
- Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China
| | - Xunhua Zheng
- Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China
| | - Yiqi Luo
- School of Integrative Plant Science, Cornell University, New York, Ithaca, USA
| | - Bruce A Hungate
- Department of Biological Sciences, Northern Arizona University, Arizona, Flagstaff, USA
| | - Cesar Terrer
- Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, Massachusetts, Cambridge, USA
| | - Klaus Butterbach-Bahl
- Institute for Meteorology and Climate Research, Atmospheric Environmental Research, Karlsruhe Institute of Technology, Garmisch-Partenkirchen, Germany
- Center for Landscape Research in Sustainable Agricultural Futures, Land-CRAFT, Department of Agroecology, Aarhus University, Aarhus, Denmark
| | - Jørgen Eivind Olesen
- Department of Agroecology, Aarhus University, Tjele, Denmark
- Aarhus University Centre for Circular Bioeconomy, Aarhus University, Tjele, Denmark
- iCLIMATE Interdisciplinary Centre for Climate Change, Aarhus University, Roskilde, Denmark
| | - Ji Chen
- State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, China
- Department of Agroecology, Aarhus University, Tjele, Denmark
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10
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Tang B, Man J, Lehmann A, Rillig MC. Arbuscular mycorrhizal fungi benefit plants in response to major global change factors. Ecol Lett 2023; 26:2087-2097. [PMID: 37794719 DOI: 10.1111/ele.14320] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2023] [Revised: 09/14/2023] [Accepted: 09/15/2023] [Indexed: 10/06/2023]
Abstract
Land plants play a key role in global carbon cycling, but the potential role of arbuscular mycorrhizal fungi (AMF) in the responses of a wide range of plant species to global change factors (GCFs) remains limited. Based on 1100 paired observations from 181 plant species, we conducted a meta-analysis to test the role of AMF in plant responses to four GCFs: drought, warming, nitrogen (N) addition and elevated CO2 . We show that AMF significantly ameliorate the negative effects of drought on plant performance. The GCFs N addition and elevated CO2 significantly enhance the performance of AM plants but not of non-inoculated plants. AM plants show better performance than their non-inoculated counterparts under warming, although neither of them showed a significant response to this GCF. These results suggest that AMF benefit plants in response to GCFs. Our study highlights the importance of AMF in enhancing plant performance under ongoing global change.
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Affiliation(s)
- Bo Tang
- Institute of Biology, Freie Universität Berlin, Berlin, Germany
- Berlin-Brandenburg Institute of Advanced Biodiversity Research (BBIB), Berlin, Germany
| | - Jing Man
- Institute of Biology, Freie Universität Berlin, Berlin, Germany
- Berlin-Brandenburg Institute of Advanced Biodiversity Research (BBIB), Berlin, Germany
| | - Anika Lehmann
- Institute of Biology, Freie Universität Berlin, Berlin, Germany
- Berlin-Brandenburg Institute of Advanced Biodiversity Research (BBIB), Berlin, Germany
| | - Matthias C Rillig
- Institute of Biology, Freie Universität Berlin, Berlin, Germany
- Berlin-Brandenburg Institute of Advanced Biodiversity Research (BBIB), Berlin, Germany
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11
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Suonan J, Lu X, Li X, Hautier Y, Wang C. Nitrogen addition strengthens the stabilizing effect of biodiversity on productivity by increasing plant trait diversity and species asynchrony in the artificial grassland communities. Front Plant Sci 2023; 14:1301461. [PMID: 38053765 PMCID: PMC10694273 DOI: 10.3389/fpls.2023.1301461] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/25/2023] [Accepted: 11/03/2023] [Indexed: 12/07/2023]
Abstract
Background and aims Nitrogen (N) enrichment usually weakens the stabilizing effect of biodiversity on productivity. However, previous studies focused on plant species richness and thus largely ignored the potential contributions of plant functional traits to stability, even though evidence is increasing that functional traits are stronger predictors than species richness of ecosystem functions. Methods We conducted a common garden experiment manipulating plant species richness and N addition levels to quantify effects of N addition on relations between species richness and functional trait identity and diversity underpinning the 'fast-slow' economics spectrum and community stability. Results Nitrogen addition had a minor effect on community stability but increased the positive effects of species richness on community stability. Increasing community stability was found in the species-rich communities dominated by fast species due to substantially increasing temporal mean productivity relative to its standard deviation. Furthermore, enhancement in 'fast-slow' functional diversity in species-rich communities dominated by fast species under N addition increased species asynchrony, resulting in a robust biodiversity-stability relationship under N addition the artificial grassland communities. Conclusion The findings demonstrate mechanistic links between plant species richness, 'fast-slow' functional traits, and community stability under N addition, suggesting that dynamics of biodiversity-stability relations under global changes are the results of species-specific responses of 'fast-slow' traits on the plant economics spectrum.
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Affiliation(s)
- Ji Suonan
- College of Life Sciences, Qinghai Normal University, Xining, China
| | - Xuwei Lu
- College of Life Sciences, Qinghai Normal University, Xining, China
| | - Xiaona Li
- Institute of Grassland, Flowers and Ecology, Beijing Academy of Agriculture and Forestry Sciences, Beijing, China
| | - Yann Hautier
- Ecology and Biodiversity Group, Department of Biology, Utrecht University, Utrecht, Netherlands
| | - Chao Wang
- Institute of Grassland, Flowers and Ecology, Beijing Academy of Agriculture and Forestry Sciences, Beijing, China
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12
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Mao WQ, Xia YH, Ma C, Zhu GX, Wang ZC, Tu Q, Chen XB, Wu JS, Su YR. [Response of Organic Carbon Mineralization to Nitrogen Addition in Micro-aerobic and Anaerobic Layers of Paddy Soil]. Huan Jing Ke Xue 2023; 44:6248-6256. [PMID: 37973107 DOI: 10.13227/j.hjkx.202209298] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 11/19/2023]
Abstract
In field conditions, a micro-aerobic layer with 1 cm thickness exists on the surface layer of paddy soil owing to the diffusion of dissolved oxygen via flooding water. However, the particularity of carbon and nitrogen transformation in this specific soil layer is not clear. A typical subtropical paddy soil was collected and incubated with13C-labelled rice straw for 100 days. The responses of exogenous fresh organic carbon(13C-rice straw) and original soil organic carbon mineralization to nitrogen fertilizer addition[(NH4)2SO4]in the micro-aerobic layer(0-1 cm) and anaerobic layer(1-5 cm) of paddy soil and their microbial processes were analyzed based on the analysis of 13C incorporation into phospholipid fatty acid(13C-PLFAs). Nitrogen addition promoted the total CO2 and 13C-CO2 emission from paddy soil by 11.4% and 12.3%, respectively. At the end of incubation, with the addition of nitrogen, the total soil organic carbon (SOC) and13C-recovery rate from rice straw in the anaerobic layer were 2.4% and 9.2% lower than those in the corresponding micro-aerobic layer, respectively. At the early stage(5 days), nitrogen addition increased the total microbial PLFAs in the anaerobic layer with a consistent response of bacterial and fungal PLFAs. However, there was no significant effect from nitrogen on microbial abundance in the micro-aerobic layer. Nitrogen addition had no significant impact on the abundance of total 13C-PLFAs in the micro-aerobic and anaerobic layers, but the abundance of 13C-PLFAs for bacteria and fungi in the micro-aerobic layer was decreased dramatically. At the late stage(100 days), the effect of nitrogen addition on microbial PLFAs was consistent with that at the early stage. The abundances of total, bacterial, and fungal 13C-PLFAs were remarkably increased in the anaerobic layer. However, the abundance of 13C-PLFAs in the micro-aerobic layer showed no significant response to nitrogen addition. During the incubation, the content of NH4+-N in the anaerobic soil layer was higher than that in the micro-aerobic soil layer. This indicates that nitrogen addition increased microbial activity in the anaerobic soil layer caused by the higher NH4+-N concentration, as majority of microorganisms preferred to use NH4+-N. Consequently, the microbial utilization and decomposition of organic carbon in the anaerobic soil layer were accelerated. By contrast, richer available N existed in the form of NO3--N in the micro-aerobic soil layer owing to the ammoxidation process. Thus, the shortage of NO3--N preference microorganisms in the paddy soil environment prohibited the microbial metabolism of organic carbon in the micro-aerobic layer. As a whole, nitrogen fertilization enhanced organic carbon loss via microbial mineralization in paddy soil with a weaker effect in the micro-aerobic layer than that in the anaerobic layer, indicating the limited microbial metabolic activity in the surface micro-aerobic layer could protect the organic carbon stabilization in paddy soil. This study emphasizes the heterogeneity of paddy soil and its significant particularity of carbon and nitrogen transformation in micro-aerobic layers. Consequently, this study has implications for optimizing the forms and method for the application of nitrogen fertilizer in paddy cropping systems.
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Affiliation(s)
- Wan-Qiong Mao
- Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yin-Hang Xia
- College of Resource and Environment, Hunan Agricultural University, Changsha 410128, China
| | - Chong Ma
- Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Guang-Xu Zhu
- College of Biology and Environment Engineering, Guiyang University, Guiyang 550005, China
| | - Zhong-Cheng Wang
- College of Forestry, Central South University of Forestry & Technology, Changsha 410004, China
| | - Qiang Tu
- Helmholtz International Laboratory for Anti-Infectives, Shandong University-Helmholtz Institute of Biotechnology, State Key Laboratory of Microbial Technology, Shandong University, Qingdao 266237, China
| | - Xiang-Bi Chen
- Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China
| | - Jin-Shui Wu
- Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China
| | - Yi-Rong Su
- Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China
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Chen T, Cheng RM, Shen YF, Xiao WF, Wang LJ, Sun PF, Zhang M, Li J. [Effects of nitrogen addition on acidolyzable organic nitrogen components and nitrogen mineralization in aggregates of Pinus massoniana plantations in the Three Gorges Reservoir area, China]. Ying Yong Sheng Tai Xue Bao 2023; 34:2601-2609. [PMID: 37897266 DOI: 10.13287/j.1001-9332.202310.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 10/30/2023]
Abstract
We sieved soils from a Pinus massoniana plantation in the Three Gorges Reservoir area into four aggregate sizes, including aggregates of 2000-8000 μm (large macroaggregates), 1000-2000 μm (coarse aggregates), 250-1000 μm (small macroaggregates), and <250 μm (microaggregates). We analyzed the differences in the acidolyzable organic N components and net N mineralization of the aggregates under different N addition levels (30, 60, and 90 kg N·hm-2·a-1, representing by N30, N60 and N90, respectively). The results showed that net nitrification rate of the aggregates ranged from 0.30-3.42 mg N·kg-1 and accounted for more than 80% of net nitrogen mineralization. Compared with the control, addition of 30, 60, and 90 kg N·hm-2·a-1 increased total N by 24.1%-45.5%, 6.4%-34.3%, and 7.9%-42.4% in the large aggregates, coarse aggregate, small macroaggregates, and microaggregates, increased net N mineralization rate by 1.3-7.2, 1.4-6.6, and 1.8-12.9 times, but decreased the contents of available phosphorus by 9.3%-36.9%, 12.2%-56.7%, and 19.2%-61.9%, respectively. The contents of total acidolyzable N, soil organic matter, and rates of net ammonification, net nitrification, and net N mineralization increased as the aggregate size decreased, while available phosphorus contents showed an opposite trend. The levels of acid-hydrolyzable N components were ranked as acidolyzable amino acid N > acidolyzable ammonia N > acidolyzable unknown N> acidolyzable amino sugar N. Total N was the dominant contributor to the increases in acid-hydrolyzable N components. Results of stepwise multiple regression analyses showed that acidoly-zable amino acid N and acidolyzable amino sugar N were predictors of net ammonification rate. Acidolyzable amino sugar N, acidolyzable amino acid N, and acidolyzable ammonia N were predictors of net nitrification, net nitrogen mineralization rate, and net nitrogen mineralization accumulation. The physical structure of aggregates was associa-ted with soil net N mineralization. Addition of N increased the contents and bioavailability of acidolyzable organic N, a large amount of which contributed to soil organic matter levels and the decrease in available phosphorus.
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Affiliation(s)
- Tian Chen
- Key Laboratory of Forest Ecology and Environment, National Forestry and Grassland Administration, Research Institute of Forest Ecology, Environment and Protection, Chinese Academy of Forestry, Beijing 100091, China
| | - Rui-Mei Cheng
- Key Laboratory of Forest Ecology and Environment, National Forestry and Grassland Administration, Research Institute of Forest Ecology, Environment and Protection, Chinese Academy of Forestry, Beijing 100091, China
- Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing 210037, China
| | - Ya-Fei Shen
- Key Laboratory of Forest Ecology and Environment, National Forestry and Grassland Administration, Research Institute of Forest Ecology, Environment and Protection, Chinese Academy of Forestry, Beijing 100091, China
- Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing 210037, China
| | - Wen-Fa Xiao
- Key Laboratory of Forest Ecology and Environment, National Forestry and Grassland Administration, Research Institute of Forest Ecology, Environment and Protection, Chinese Academy of Forestry, Beijing 100091, China
- Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing 210037, China
| | - Li-Jun Wang
- Key Laboratory of Forest Ecology and Environment, National Forestry and Grassland Administration, Research Institute of Forest Ecology, Environment and Protection, Chinese Academy of Forestry, Beijing 100091, China
| | - Peng-Fei Sun
- Key Laboratory of Forest Ecology and Environment, National Forestry and Grassland Administration, Research Institute of Forest Ecology, Environment and Protection, Chinese Academy of Forestry, Beijing 100091, China
| | - Meng Zhang
- Key Laboratory of Forest Ecology and Environment, National Forestry and Grassland Administration, Research Institute of Forest Ecology, Environment and Protection, Chinese Academy of Forestry, Beijing 100091, China
| | - Jing Li
- Key Laboratory of Forest Ecology and Environment, National Forestry and Grassland Administration, Research Institute of Forest Ecology, Environment and Protection, Chinese Academy of Forestry, Beijing 100091, China
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14
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Li C, Valencia E, Shi Y, Zhou G, Li X. N 2-fixing bacteria are more sensitive to microtopography than nitrogen addition in degraded grassland. Front Microbiol 2023; 14:1240634. [PMID: 37779719 PMCID: PMC10540685 DOI: 10.3389/fmicb.2023.1240634] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2023] [Accepted: 08/25/2023] [Indexed: 10/03/2023] Open
Abstract
Introduction Soil bacteria play a crucial role in the terrestrial nitrogen (N) cycle by fixing atmospheric N2, and this process is influenced by both biotic and abiotic factors. The diversity of N2-fixing bacteria (NFB) directly reflects the efficiency of soil N fixation, and the diversity of NFB in degraded alpine meadow soil may change with different N fertilizing levels and varied slopes. However, how N addition affects the diversity of NFB in degraded alpine meadows, and whether this influence varies with slope, remain poorly understood. Methods We conducted an N addition field experiment at three levels (2, 5, and 10 g N·m-2·a-1) to study the effects of N addition on soil NFB diversity on two different slopes in a degraded meadow on the Tibetan Plateau. Results There were significant differences in the dominant bacterial species between the two slopes. The Chao1 index, species richness, and beta diversity of NFB did not differ significantly between slopes, but the Shannon index did. Interestingly, N addition had no effect on the diversity of NFB or the abundance of dominant bacteria. However, we did observe a significant change in some low-abundance NFB. The community composition and diversity of NFB were significantly positively correlated with slope and soil physicochemical properties (e.g., total potassium, pH, and total nitrogen). Conclusions Our study highlights the variation in NFB communities among different slopes in degraded alpine meadows and their resilience to exogenous N addition. Our results also underscore the importance of considering the effects of micro-topography on soil microbial communities in future studies of alpine ecosystems.
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Affiliation(s)
- Chengyi Li
- College of Agriculture and Animal Husbandry, Qinghai University, Xining, China
| | - Enrique Valencia
- Departamento de Biodiversidad, Ecología y Evolución, Facultad de Ciencias Biológicas, Universidad Complutense de Madrid, Madrid, Spain
| | - Yan Shi
- School of Environment, The University of Auckland, Auckland, New Zealand
| | - Guiyao Zhou
- German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Leipzig, Germany
- Institute of Biology, Leipzig University, Leipzig, Germany
| | - Xilai Li
- College of Agriculture and Animal Husbandry, Qinghai University, Xining, China
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15
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Li D, Meng M, Ren B, Ma X, Bai L, Li J, Bai G, Yao F, Tan C. Different responses of soil fungal and bacterial communities to nitrogen addition in a forest grassland ecotone. Front Microbiol 2023; 14:1211768. [PMID: 37736095 PMCID: PMC10510407 DOI: 10.3389/fmicb.2023.1211768] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2023] [Accepted: 08/14/2023] [Indexed: 09/23/2023] Open
Abstract
Introduction Continuous nitrogen deposition increases the nitrogen content of terrestrial ecosystem and affects the geochemical cycle of soil nitrogen. Forest-grassland ecotone is the interface area of forest and grassland and is sensitive to global climate change. However, the structure composition and diversity of soil microbial communities and their relationship with soil environmental factors at increasing nitrogen deposition have not been sufficiently studied in forest-grassland ecotone. Methods In this study, experiments were carried out with four nitrogen addition treatments (0 kgN·hm-2·a-1, 10 kgN·hm-2·a-1, 20 kgN·hm-2·a-1 and 40 kgN·hm-2·a-1) to simulate nitrogen deposition in a forest-grassland ecotone in northwest Liaoning Province, China. High-throughput sequencing and qPCR technologies were used to analyze the composition, structure, and diversity characteristics of the soil microbial communities under different levels of nitrogen addition. Results and discussion The results showed that soil pH decreased significantly at increasing nitrogen concentrations, and the total nitrogen and ammonium nitrogen contents first increased and then decreased, which were significantly higher in the N10 treatment than in other treatments (N:0.32 ~ 0.48 g/kg; NH4+-N: 11.54 ~ 13 mg/kg). With the increase in nitrogen concentration, the net nitrogen mineralization, nitrification, and ammoniation rates decreased. The addition of nitrogen had no significant effect on the diversity and structure of the fungal community, while the diversity of the bacterial community decreased significantly at increasing nitrogen concentrations. Ascomycetes and Actinomycetes were the dominant fungal and bacterial phyla, respectively. The relative abundance of Ascomycetes was negatively correlated with total nitrogen content, while that of Actinomycetes was positively correlated with soil pH. The fungal community diversity was significantly negatively correlated with nitrate nitrogen, while the diversity of the bacterial community was significantly positively correlated with soil pH. No significant differences in the abundance of functional genes related to soil nitrogen transformations under the different treatments were observed. Overall, the distribution pattern and driving factors were different in soil microbial communities in a forest-grassland ecotone in northwest Liaoning. Our study enriches research content related to factors that affect the forest-grassland ecotone.
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Affiliation(s)
- Daiyan Li
- College of Horticulture, Shenyang Agricultural University, Shenyang, Liaoning, China
| | - Meng Meng
- College of Horticulture, Shenyang Agricultural University, Shenyang, Liaoning, China
| | - Baihui Ren
- College of Horticulture, Shenyang Agricultural University, Shenyang, Liaoning, China
| | - Xinwei Ma
- College of Horticulture, Shenyang Agricultural University, Shenyang, Liaoning, China
| | - Long Bai
- College of Horticulture, Shenyang Agricultural University, Shenyang, Liaoning, China
| | - Jiahuan Li
- College of Horticulture, Shenyang Agricultural University, Shenyang, Liaoning, China
| | - Guohua Bai
- Zhangwu County Forest and Grass Development Service Center, Fuxin, Liaoning, China
| | - Fengjun Yao
- Zhangwu County Forest and Grass Development Service Center, Fuxin, Liaoning, China
| | - Chunming Tan
- Zhangwu County Forest and Grass Development Service Center, Fuxin, Liaoning, China
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16
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Yang G, Zhang M, Jin G. Effects of nitrogen addition on species composition and diversity of early spring herbs in a Korean pine plantation. Ecol Evol 2023; 13:e10498. [PMID: 37674646 PMCID: PMC10480043 DOI: 10.1002/ece3.10498] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2022] [Revised: 08/17/2023] [Accepted: 08/22/2023] [Indexed: 09/08/2023] Open
Abstract
Under the background of global nitrogen deposition, temperate forest ecosystems are suffering increasing threats, and species diversity is gradually decreasing. In this study, nitrogen addition experiments were conducted on Korean pine (Pinus koraiensis) plantations in Northeast China to explore the effect of long-term nitrogen addition on herb species diversity to test the following hypothesis: long-term nitrogen addition further reduced plant species diversity by affecting plant growth, which may be due to soil acidification caused by excessive nitrogen addition. Experimental nitrogen addition was conducted from 2014 to 2021, and the nitrogen treatment levels were as follows: N0 (control treatment, 0/(kg N ha-1 year-1)), N20 (low nitrogen treatment, 20/(kg N ha-1 year-1)), N40 (medium nitrogen treatment, 40/(kg N ha-1 year-1)) and N80 (high nitrogen treatment, 80/(kg N ha-1 year-1)). A herb community survey was conducted in the region from 2015 to 2021. The results showed that long-term nitrogen addition decreased soil pH, changed the species and composition of herbaceous plants, and decreased the species diversity of understory herbaceous plants. With the increase in nitrogen application years, middle- and high-nitrogen treatments significantly reduced the diversity of early-spring flowering herbs and early-spring foliating herbs, and their diversity decreased with the decrease in soil pH, indicating that soil acidification caused by long-term nitrogen addition may lead to the decrease of plant diversity. However, for early-spring growing herbs, adequate nitrogen addition may promote their growth. Our results show that plants have evolved different life-history strategies based on their adaptation mechanisms to the environment, and different life-history strategies have different responses to long-term nitrogen addition. However, for most plants, long-term nitrogen application will have a negative impact on the growth and diversity of herbs in temperate forests.
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Affiliation(s)
- Guanghui Yang
- Center for Ecological ResearchNortheast Forestry UniversityHarbinChina
| | - Mengmeng Zhang
- Center for Ecological ResearchNortheast Forestry UniversityHarbinChina
- College of Life ScienceHeilongjiang UniversityHarbinChina
| | - Guangze Jin
- Center for Ecological ResearchNortheast Forestry UniversityHarbinChina
- Key Laboratory of Sustainable Forest Ecosystem Management‐Ministry of EducationNortheast Forestry UniversityHarbinChina
- Northeast Asia Biodiversity Research CenterNortheast Forestry UniversityHarbinChina
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17
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Meeran K, Verbrigghe N, Ingrisch J, Fuchslueger L, Müller L, Sigurðsson P, Sigurdsson BD, Wachter H, Watzka M, Soong JL, Vicca S, Janssens IA, Bahn M. Individual and interactive effects of warming and nitrogen supply on CO 2 fluxes and carbon allocation in subarctic grassland. Glob Chang Biol 2023; 29:5276-5291. [PMID: 37427494 PMCID: PMC10962691 DOI: 10.1111/gcb.16851] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Accepted: 05/21/2023] [Indexed: 07/11/2023]
Abstract
Climate warming has been suggested to impact high latitude grasslands severely, potentially causing considerable carbon (C) losses from soil. Warming can also stimulate nitrogen (N) turnover, but it is largely unclear whether and how altered N availability impacts belowground C dynamics. Even less is known about the individual and interactive effects of warming and N availability on the fate of recently photosynthesized C in soil. On a 10-year geothermal warming gradient in Iceland, we studied the effects of soil warming and N addition on CO2 fluxes and the fate of recently photosynthesized C through CO2 flux measurements and a 13 CO2 pulse-labeling experiment. Under warming, ecosystem respiration exceeded maximum gross primary productivity, causing increased net CO2 emissions. N addition treatments revealed that, surprisingly, the plants in the warmed soil were N limited, which constrained primary productivity and decreased recently assimilated C in shoots and roots. In soil, microbes were increasingly C limited under warming and increased microbial uptake of recent C. Soil respiration was increased by warming and was fueled by increased belowground inputs and turnover of recently photosynthesized C. Our findings suggest that a decade of warming seemed to have induced a N limitation in plants and a C limitation by soil microbes. This caused a decrease in net ecosystem CO2 uptake and accelerated the respiratory release of photosynthesized C, which decreased the C sequestration potential of the grassland. Our study highlights the importance of belowground C allocation and C-N interactions in the C dynamics of subarctic ecosystems in a warmer world.
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Affiliation(s)
| | - Niel Verbrigghe
- Research Group Plants and EcosystemsUniversity of AntwerpAntwerpBelgium
| | | | - Lucia Fuchslueger
- Research Group Plants and EcosystemsUniversity of AntwerpAntwerpBelgium
- Centre for Microbiology and Environmental Systems ScienceUniversity of ViennaViennaAustria
| | - Lena Müller
- Department of EcologyUniversity of InnsbruckInnsbruckAustria
| | | | | | - Herbert Wachter
- Department of EcologyUniversity of InnsbruckInnsbruckAustria
| | - Margarete Watzka
- Centre for Microbiology and Environmental Systems ScienceUniversity of ViennaViennaAustria
| | - Jennifer L. Soong
- Research Group Plants and EcosystemsUniversity of AntwerpAntwerpBelgium
- Soil and Crop Sciences DepartmentColorado State UniversityFort CollinsColoradoUSA
| | - Sara Vicca
- Research Group Plants and EcosystemsUniversity of AntwerpAntwerpBelgium
| | - Ivan A. Janssens
- Research Group Plants and EcosystemsUniversity of AntwerpAntwerpBelgium
| | - Michael Bahn
- Department of EcologyUniversity of InnsbruckInnsbruckAustria
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18
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Qi L, Song Y, Zhang P, Sun W, Wang W, Yi S, Li J, Liu H, Bi Z, Du N, Guo W. The combined effect of fire and nitrogen addition on biodiversity and herbaceous aboveground productivity in a coastal shrubland. Front Plant Sci 2023; 14:1240591. [PMID: 37705707 PMCID: PMC10497117 DOI: 10.3389/fpls.2023.1240591] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2023] [Accepted: 07/25/2023] [Indexed: 09/15/2023]
Abstract
Introduction Fire and nitrogen (N) deposition each impact biodiversity and ecosystem productivity. However, the effect of N deposition on ecosystem recovery after fire is still far from understood, especially in coastal wetlands. Methods We selected a typical coastal shrubland to simulate three N deposition levels (0, 10, and 20 g N m-2 year-1) under two different burned conditions (unburned and burned) in the Yellow River Delta of North China. Soil properties, soil microbial biodiversity, shrub growth parameters, herbaceous biodiversity, and aboveground productivity were determined after experimental treatments for 1 year. Results We found that fire had a stronger influence on the ecosystem than N addition. One year after the fire, shrub growth had significantly decreased, while soil pH, soil electrical conductivity, herbaceous biodiversity, soil microbial biodiversity, and herbaceous aboveground productivity significantly increased. Conversely, a single year of N addition only slightly increased herbaceous aboveground productivity. The combined effect of fire and N addition was only significant for fungus biodiversity and otherwise had minimal influence. Interestingly, we found that herbaceous aboveground productivity was positively associated with fungal community diversity under unburned conditions but not in burned shrublands. Fire showed a great impact on soil parameters and biodiversity in the coastal wetland ecosystem even after a full year of recovery. Discussion Fire may also diminish the influence of several belowground factors on herbaceous aboveground productivity, which ultimately reduces recovery and stability. Appropriate N addition may be an effective way to improve the ecosystem productivity in a wetland dominated by shrub species.
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Affiliation(s)
- Luyu Qi
- Key Laboratory of Ecological Prewarning, Protection and Restoration of Bohai Sea, Ministry of Natural Resources, School of Life Sciences, Shandong University, Qingdao, China
| | - Yixin Song
- Key Laboratory of Ecological Prewarning, Protection and Restoration of Bohai Sea, Ministry of Natural Resources, School of Life Sciences, Shandong University, Qingdao, China
| | - Puyi Zhang
- Key Laboratory of Ecological Prewarning, Protection and Restoration of Bohai Sea, Ministry of Natural Resources, School of Life Sciences, Shandong University, Qingdao, China
| | - Wenlong Sun
- Key Laboratory of Ecological Prewarning, Protection and Restoration of Bohai Sea, Ministry of Natural Resources, School of Life Sciences, Shandong University, Qingdao, China
| | - Wei Wang
- Observation and Research Station of Bohai Strait Eco-Corridor, First Institute of Oceanography, Ministry of Natural Resources, Qingdao, China
| | - Shijie Yi
- Observation and Research Station of Bohai Strait Eco-Corridor, First Institute of Oceanography, Ministry of Natural Resources, Qingdao, China
| | - Jing Li
- Shandong Yellow River Delta National Nature Reserve Management Committee, Dongying, China
| | - Haifang Liu
- Shandong Yellow River Delta National Nature Reserve Management Committee, Dongying, China
| | - Zhenggang Bi
- Shandong Yellow River Delta National Nature Reserve Management Committee, Dongying, China
| | - Ning Du
- Key Laboratory of Ecological Prewarning, Protection and Restoration of Bohai Sea, Ministry of Natural Resources, School of Life Sciences, Shandong University, Qingdao, China
| | - Weihua Guo
- Key Laboratory of Ecological Prewarning, Protection and Restoration of Bohai Sea, Ministry of Natural Resources, School of Life Sciences, Shandong University, Qingdao, China
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19
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Zhao H, Yang W, Cheng J, Huang G, Hu Y, Li C, Sheng J. The effects of N-addition on litter mixture effects depend on decomposition time: A case from mixed-litter decomposition in the Gurbantunggut Desert. Ecol Evol 2023; 13:e10377. [PMID: 37554399 PMCID: PMC10405231 DOI: 10.1002/ece3.10377] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2022] [Revised: 04/01/2023] [Accepted: 07/17/2023] [Indexed: 08/10/2023] Open
Abstract
Changes in nitrogen (N) deposition and litter mixtures have been shown to influence ecosystem processes such as litter decomposition. However, the interactive effects of litter mixing and N-deposition on decomposition process in desert regions remain poorly identified. We assessed the simultaneous effects of both N addition and litter mixture on mass loss in a litterbag decomposition experiment using six native plants in single-species samples with diverse quality and 14-species combinations in the Gurbantunggut Desert under two N addition treatments (control and N addition). The N addition had no significant effect on decomposition rate of single-species litter (expect Haloxylon ammodendron), whereas litter mass loss and decomposition rate differed significantly among species, with variations positively correlated with initial phosphorus concentration and negatively correlated with initial lignin concentration. After 18 months, the average mass loss across litter mixtures did not overall differ from those predicted from single species either in control or N addition treatments, that is, mixing of different species had no non-additive effects on decomposition. The N addition, however, did modify the direction of mixture effects and interacted with incubation time. Added N transformed synergistic effects of litter mixtures to antagonistic effects on mass loss after 1 month of decomposition, while transforming neutral effects of litter mixture to synergistic effects after 6 months of decomposition. Our results demonstrated that initial chemical properties played an important role in litter decomposition, while no effects of litter mixture on decomposition process in this desert region. The N addition altered the litter mixture effects on mass loss with incubation time, implying that increased N deposition in the future may have profound effects on carbon turnover to a greater extent than previously thought in desert ecosystems.
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Affiliation(s)
- Hong‐Mei Zhao
- Xinjiang Key Laboratory of Soil and Plant Ecological Processes, College of Resources and EnvironmentXinjiang Agricultural UniversityUrumqiChina
| | - Wei‐Jun Yang
- College of AgronomyXinjiang Agricultural UniversityUrumqiChina
| | - Jun‐Hui Cheng
- Xinjiang Key Laboratory of Soil and Plant Ecological Processes, College of Resources and EnvironmentXinjiang Agricultural UniversityUrumqiChina
| | - Gang Huang
- Institute of Geography ScienceFujian Normal UniversityFuzhouChina
| | - Yu‐Tong Hu
- Xinjiang Key Laboratory of Soil and Plant Ecological Processes, College of Resources and EnvironmentXinjiang Agricultural UniversityUrumqiChina
| | - Cong‐Juan Li
- National Engineering Technology Research Center for Desert‐Oasis Ecological Construction, Xinjiang Institute of Ecology and GeographyChinese Academy of SciencesUrumqiChina
| | - Jian‐Dong Sheng
- Xinjiang Key Laboratory of Soil and Plant Ecological Processes, College of Resources and EnvironmentXinjiang Agricultural UniversityUrumqiChina
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20
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Li S, Lu S, Li X, Hou X, Zhao X, Xu X, Zhao N. Effects of Spring Drought and Nitrogen Addition on Productivity and Community Composition of Degraded Grasslands. Plants (Basel) 2023; 12:2836. [PMID: 37570989 PMCID: PMC10421370 DOI: 10.3390/plants12152836] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2023] [Revised: 07/20/2023] [Accepted: 07/29/2023] [Indexed: 08/13/2023]
Abstract
To explore whether there were differences among the patterns of response of grasslands with different levels of degradation to extreme drought events and nitrogen addition, three grasslands along a degradation gradient (extremely, moderately, and lightly degraded) were selected in the Bashang area of northern China using the human disturbance index (HDI). A field experiment with simulated extreme spring drought, nitrogen addition, and their interaction was conducted during the growing seasons of 2020 and 2021. The soil moisture, aboveground biomass, and composition of the plant community were measured. The primary results were as follows. (1) Drought treatment caused soil drought stress, with moderately degraded grassland being the most affected, which resulted in an 80% decrease in soil moisture and a 78% decrease in aboveground biomass. The addition of nitrogen did not mitigate the impact of drought. Moreover, the aboveground net primary production (ANPP) in 2021 was less sensitive to spring drought than in 2020. (2) The community composition changed after 2 years of drought treatment, particularly for the moderately degraded grasslands with annual forbs, such as Salsola collina, increasing significantly in biomass proportion, which led to a trend of exacerbated degradation (higher HDI). This degradation trend decreased under the addition of nitrogen. (3) The variation in drought sensitivities of the ANPP was primarily determined by the proportion of plants based on the classification of degradation indicators in the community, with higher proportions of intermediate degradation indicator species exhibiting more sensitivity to spring drought. These findings can help to provide scientific evidence for the governance and restoration of regional degraded grassland under frequent extreme weather conditions.
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Affiliation(s)
- Shaoning Li
- Institute of Forestry and Pomology, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100093, China; (S.L.); (S.L.)
- Beijing Yanshan Forest Ecosystem Positioning Observation and Research Station, Beijing 100093, China
- College of Landscape Architecture, Beijing University of Agriculture, Beijing 102203, China
| | - Shaowei Lu
- Institute of Forestry and Pomology, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100093, China; (S.L.); (S.L.)
- Beijing Yanshan Forest Ecosystem Positioning Observation and Research Station, Beijing 100093, China
- College of Landscape Architecture, Beijing University of Agriculture, Beijing 102203, China
| | - Xiaohui Li
- Huamugou Forest Farm, Hexigten Banner, Chifeng City, Inner Mongolia Autonomous Region, Chifeng 025350, China
| | - Xingchen Hou
- Institute of Forestry and Pomology, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100093, China; (S.L.); (S.L.)
- Beijing Yanshan Forest Ecosystem Positioning Observation and Research Station, Beijing 100093, China
- College of Landscape Architecture, Beijing University of Agriculture, Beijing 102203, China
| | - Xi Zhao
- Institute of Forestry and Pomology, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100093, China; (S.L.); (S.L.)
- Beijing Yanshan Forest Ecosystem Positioning Observation and Research Station, Beijing 100093, China
- College of Landscape Architecture, Beijing University of Agriculture, Beijing 102203, China
| | - Xiaotian Xu
- Institute of Forestry and Pomology, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100093, China; (S.L.); (S.L.)
- Beijing Yanshan Forest Ecosystem Positioning Observation and Research Station, Beijing 100093, China
| | - Na Zhao
- Institute of Forestry and Pomology, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100093, China; (S.L.); (S.L.)
- Beijing Yanshan Forest Ecosystem Positioning Observation and Research Station, Beijing 100093, China
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21
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Wu YX, Liu JT, Ding C, Zhang BC, Liang XS, Ning Y, Yin JX, Lv XT. Effects of nitrogen inputs and mowing on the abundance and species richness of herbivorous insects in a meadow steppe. Ying Yong Sheng Tai Xue Bao 2023; 34:1975-1980. [PMID: 37694482 DOI: 10.13287/j.1001-9332.202307.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 09/12/2023]
Abstract
To reveal the effects of nitrogen (N) inputs and mowing on the abundance and richness of insect community in meadow steppe, we investigated the abundance and diversity of herbivorous insects under four treatments in Inner Mongolia meadow steppe in August 2022, including control, N addition, mowing, and combined N addition and mowing. At a long-term control experimental platform, we collected insects using the vacuum sampling method. The results showed that N addition significantly increased the abundance of herbivorous insects, and mowing significantly decreased the abundance of herbivorous insects. Nitrogen addition significantly increased insect abundance in unmown condition but not in the mown condition. The responses of insect abundance at the community level to N addition were mainly driven by the dominant groups, Cicadellidae and Lygaeidae, which was affected by the abundance of Gramineae species. In contrast, their responses to mowing were the opposite. Both N addition and mowing did not affect the diversity of herbivorous insects. Our results indicated that the responses of herbivorous insect abundance to N inputs and mowing were directly regulated by food resources. With increasing food resource availability, the abundance but not the diversity of herbivorous insects increased, with stronger responses of dominant groups than subordinate ones.
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Affiliation(s)
- Yuan-Xiu Wu
- School of Life Sciences, Liaoning University, Shenyang 110036, China
- Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China
| | - Jing-Tong Liu
- School of Life Sciences, Liaoning University, Shenyang 110036, China
- Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China
| | - Cong Ding
- Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China
| | - Bing-Chuan Zhang
- Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China
| | - Xiao-Sa Liang
- Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China
| | - Yu Ning
- Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China
| | - Jiang-Xia Yin
- School of Life Sciences, Liaoning University, Shenyang 110036, China
| | - Xiao-Tao Lv
- Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China
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22
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Zhou H, Min X, Chen J, Lu C, Huang Y, Zhang Z, Liu H. Climate warming interacts with other global change drivers to influence plant phenology: A meta-analysis of experimental studies. Ecol Lett 2023. [PMID: 37278184 DOI: 10.1111/ele.14259] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2022] [Revised: 05/07/2023] [Accepted: 05/09/2023] [Indexed: 06/07/2023]
Abstract
Shifts in plant phenology influence ecosystem structures and functions, yet how multiple global change drivers interact to affect phenology remains elusive. We conducted a meta-analysis of 242 published articles to assess interactions between warming (W) and other global change drivers including nitrogen addition (N), increased precipitation (IP), decreased precipitation (DP) and elevated CO2 (eCO2 ) on multiple phenophases in experimental studies. We show that leaf out and first flowering were most strongly affected by warming, while warming and decreased precipitation were the most pronounced drivers for leaf colouring. Moreover, interactions between warming and other global change drivers were common and both synergistic and antagonistic interactions were observed: interactions W + IP and W + eCO2 were frequently synergistic, whereas interactions W + N and W + DP were mostly antagonistic. These findings demonstrate that global change drivers often affect plant phenology interactively. Incorporating the multitude of interactions into models is crucial for accurately predicting plant responses to global changes.
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Affiliation(s)
- Huimin Zhou
- Zhejiang Tiantong Forest Ecosystem National Observation and Research Station, Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, Center for Global Change and Ecological Forecasting, School of Ecological and Environmental Sciences, East China Normal University, Shanghai, China
| | - Xueting Min
- Zhejiang Tiantong Forest Ecosystem National Observation and Research Station, Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, Center for Global Change and Ecological Forecasting, School of Ecological and Environmental Sciences, East China Normal University, Shanghai, China
| | - Jianghui Chen
- Zhejiang Tiantong Forest Ecosystem National Observation and Research Station, Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, Center for Global Change and Ecological Forecasting, School of Ecological and Environmental Sciences, East China Normal University, Shanghai, China
| | - Chunyan Lu
- Zhejiang Tiantong Forest Ecosystem National Observation and Research Station, Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, Center for Global Change and Ecological Forecasting, School of Ecological and Environmental Sciences, East China Normal University, Shanghai, China
| | - Yixuan Huang
- Zhejiang Tiantong Forest Ecosystem National Observation and Research Station, Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, Center for Global Change and Ecological Forecasting, School of Ecological and Environmental Sciences, East China Normal University, Shanghai, China
| | - Zhenhua Zhang
- Qinghai Haibei National Field Research Station of Alpine Grassland Ecosystem, and Key Laboratory of Adaptation and Evolution of Plateau Biota, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, China
| | - Huiying Liu
- Zhejiang Tiantong Forest Ecosystem National Observation and Research Station, Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, Center for Global Change and Ecological Forecasting, School of Ecological and Environmental Sciences, East China Normal University, Shanghai, China
- Institute of Eco-Chongming (IEC), East China Normal University, Shanghai, China
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23
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Hagh-Doust N, Mikryukov V, Anslan S, Bahram M, Puusepp R, Dulya O, Tedersoo L. Effects of nitrogen deposition on carbon and nutrient cycling along a natural soil acidity gradient as revealed by metagenomics. New Phytol 2023; 238:2607-2620. [PMID: 36949609 DOI: 10.1111/nph.18897] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2023] [Accepted: 03/15/2023] [Indexed: 05/19/2023]
Abstract
Nitrogen (N) deposition and soil acidification are environmental challenges affecting ecosystem functioning, health, and biodiversity, but their effects on functional genes are poorly understood. Here, we utilized metabarcoding and metagenomics to investigate the responses of soil functional genes to N deposition along a natural soil pH gradient. Soil N content was uncorrelated with pH, enabling us to investigate their effects separately. Soil acidity strongly and negatively affected the relative abundances of most cluster of orthologous gene categories of the metabolism supercategory. Similarly, soil acidity negatively affected the diversity of functional genes related to carbon and N but not phosphorus cycling. Multivariate analyses showed that soil pH was the most important factor affecting microbial and functional gene composition, while the effects of N deposition were less important. Relative abundance of KEGG functional modules related to different parts of the studied cycles showed variable responses to soil acidity and N deposition. Furthermore, our results suggested that the diversity-function relationship reported for other organisms also applies to soil microbiomes. Since N deposition and soil pH affected microbial taxonomic and functional composition to a different extent, we conclude that N deposition effects might be primarily mediated through soil acidification in forest ecosystems.
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Affiliation(s)
- Niloufar Hagh-Doust
- Institute of Ecology and Earth Sciences, University of Tartu, Juhan Liivi 2, 50409, Tartu, Estonia
- Mycology and Microbiology Center, University of Tartu, Juhan Liivi 2, 50409, Tartu, Estonia
| | - Vladimir Mikryukov
- Institute of Ecology and Earth Sciences, University of Tartu, Juhan Liivi 2, 50409, Tartu, Estonia
- Mycology and Microbiology Center, University of Tartu, Juhan Liivi 2, 50409, Tartu, Estonia
| | - Sten Anslan
- Institute of Ecology and Earth Sciences, University of Tartu, Juhan Liivi 2, 50409, Tartu, Estonia
- Mycology and Microbiology Center, University of Tartu, Juhan Liivi 2, 50409, Tartu, Estonia
| | - Mohammad Bahram
- Institute of Ecology and Earth Sciences, University of Tartu, Juhan Liivi 2, 50409, Tartu, Estonia
- Department of Ecology, Swedish University of Agricultural Sciences, Ulls Väg 16, 75651, Uppsala, Sweden
| | - Rasmus Puusepp
- Institute of Ecology and Earth Sciences, University of Tartu, Juhan Liivi 2, 50409, Tartu, Estonia
| | - Olesya Dulya
- Institute of Ecology and Earth Sciences, University of Tartu, Juhan Liivi 2, 50409, Tartu, Estonia
- Mycology and Microbiology Center, University of Tartu, Juhan Liivi 2, 50409, Tartu, Estonia
| | - Leho Tedersoo
- Mycology and Microbiology Center, University of Tartu, Juhan Liivi 2, 50409, Tartu, Estonia
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24
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Liu SS, Wang QC, Shi JM, Liu ZK, Shen JP, He JZ, Zheng Y. Responses of root-associated fungal community structure of mycorrhizal plants to nitrogen and/or phosphorus addition in a subtropical forest. Ying Yong Sheng Tai Xue Bao 2023; 34:1547-1554. [PMID: 37694417 DOI: 10.13287/j.1001-9332.202306.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 09/12/2023]
Abstract
Root-associated fungi play a vital role in maintaining nutrient absorption and health of host plants. To compare the responses of root-associated fungal community structures to nitrogen (N) and/or phosphorus (P) additions across differential mycorrhizal types, we collected roots of nine plant species belonging to three mycorrhizal types (arbuscular mycorrhiza, ectomycorrhiza, and ericoid mycorrhiza) under control and N and/or P addition treatments from a subtropical forest, and detected the diversity and community composition of fungi inhabiting roots through the high-throughput sequencing technique. The results showed that root-associated fungal communities of all nine plant species were mainly composed of Basidiomycota and Ascomycota. The relative abundance of Ascomycota and Basidiomycota was significantly lower and higher under the P addition than that under control, respectively. The relative abundance of Ascomycota of ericoid mycorrhizal trees was significantly higher than those of arbuscular mycorrhizal and ectomycorrhizal trees, while the relative abundance of Basidiomycota was significantly lower than the other two mycorrhizal types. Compared with the control, P addition significantly reduced the α-diversity and changed community composition of root-associated fungi across different mycorrhizal plant types, while no effect of N addition or mycorrhizal type was observed. Compared with the control and N addition treatments, NP addition caused root-associated fungal communities of all plants becoming integrally divergent. In addition, the fungal communities of ectomycorrhizal mycorrhizal trees became apparently convergent in comparison with those of arbuscular and ericoid mycorrhizal trees under the NP addition. Collectively, our results highlighted that P was a critical factor influencing community structures of tree root-associated fungi in subtropical forest soils. This study would enhance our understanding of the responses and maintenance mechanisms of plant root-associated fungal diversity under global environmental changes in the subtropical region.
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Affiliation(s)
- Shan-Shan Liu
- Key Laboratory for Humid Subtropical Eco-geographical Processes of the Ministry of Education, Fujian Normal University, Fuzhou 350117, China
- School of Geographical Sciences, Fujian Normal University, Fuzhou 350117, China
| | - Quan-Cheng Wang
- Key Laboratory for Humid Subtropical Eco-geographical Processes of the Ministry of Education, Fujian Normal University, Fuzhou 350117, China
- School of Geographical Sciences, Fujian Normal University, Fuzhou 350117, China
| | - Jia-Mian Shi
- Key Laboratory for Humid Subtropical Eco-geographical Processes of the Ministry of Education, Fujian Normal University, Fuzhou 350117, China
- School of Geographical Sciences, Fujian Normal University, Fuzhou 350117, China
| | - Zi-Kai Liu
- Key Laboratory for Humid Subtropical Eco-geographical Processes of the Ministry of Education, Fujian Normal University, Fuzhou 350117, China
- School of Geographical Sciences, Fujian Normal University, Fuzhou 350117, China
| | - Ju-Pei Shen
- Key Laboratory for Humid Subtropical Eco-geographical Processes of the Ministry of Education, Fujian Normal University, Fuzhou 350117, China
- School of Geographical Sciences, Fujian Normal University, Fuzhou 350117, China
| | - Ji-Zheng He
- Key Laboratory for Humid Subtropical Eco-geographical Processes of the Ministry of Education, Fujian Normal University, Fuzhou 350117, China
- School of Geographical Sciences, Fujian Normal University, Fuzhou 350117, China
| | - Yong Zheng
- Key Laboratory for Humid Subtropical Eco-geographical Processes of the Ministry of Education, Fujian Normal University, Fuzhou 350117, China
- School of Geographical Sciences, Fujian Normal University, Fuzhou 350117, China
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25
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Ma Y, Zhao X, Li X, Hu Y, Wang C. Intraspecific Variation in Functional Traits of Medicago sativa Determine the Effect of Plant Diversity and Nitrogen Addition on Flowering Phenology in a One-Year Common Garden Experiment. Plants (Basel) 2023; 12:1994. [PMID: 37653910 PMCID: PMC10223969 DOI: 10.3390/plants12101994] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/13/2023] [Revised: 04/27/2023] [Accepted: 05/08/2023] [Indexed: 06/29/2023]
Abstract
Nitrogen deposition and biodiversity alter plant flowering phenology through abiotic factors and functional traits. However, few studies have considered their combined effects on flowering phenology. A common garden experiment with two nitrogen addition levels (0 and 6 g N m-2 year-1) and five species richness levels (1, 2, 4, 6, and 8) was established. We assessed the effects of nitrogen addition and plant species richness on three flowering phenological events of Medicago sativa L. via changes in functional traits, soil nutrients, and soil moisture and temperature. The first flowering day was delayed, the last flowering day advanced, and the flowering duration shortened after nitrogen addition. Meanwhile, the last flowering day advanced, and flowering duration shortened along plant species richness gradients, with an average of 0.64 and 0.95 days change per plant species increase, respectively. Importantly, it was observed that plant species richness affected flowering phenology mainly through changes in plant nutrient acquisition traits (i.e., leaf nitrogen and carbon/nitrogen ratio). Our findings illustrate the non-negligible effects of intraspecific variation in functional traits on flowering phenology and highlight the importance of including functional traits in phenological models to improve predictions of plant phenology in response to nitrogen deposition and biodiversity loss.
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Affiliation(s)
- Yue Ma
- College of Grassland Science, Shanxi Agricultural University, Jinzhong 030801, China
- Institute of Grassland, Flowers and Ecology, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China (Y.H.)
| | - Xiang Zhao
- College of Grassland Science, Shanxi Agricultural University, Jinzhong 030801, China
| | - Xiaona Li
- Institute of Grassland, Flowers and Ecology, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China (Y.H.)
| | - Yanxia Hu
- Institute of Grassland, Flowers and Ecology, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China (Y.H.)
| | - Chao Wang
- Institute of Grassland, Flowers and Ecology, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China (Y.H.)
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26
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Gineyts R, Niboyet A. Nitrification, denitrification, and related functional genes under elevated CO 2 : A meta-analysis in terrestrial ecosystems. Glob Chang Biol 2023; 29:1839-1853. [PMID: 36537009 DOI: 10.1111/gcb.16568] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2022] [Revised: 11/07/2022] [Accepted: 12/07/2022] [Indexed: 05/28/2023]
Abstract
Global change may have profound effects on soil nitrogen (N) cycling that can induce positive feedback to climate change through increased nitrous oxide (N2 O) emissions mediated by nitrification and denitrification. We conducted a meta-analysis of the effects of elevated CO2 on nitrification and denitrification based on 879 observations from 58 publications and 46 independent elevated CO2 experiments in terrestrial ecosystems. We investigated the effects of elevated CO2 alone or combined with elevated temperature, increased precipitation, drought, and N addition. We assessed the response to elevated CO2 of gross and potential nitrification, potential denitrification, and abundances of related functional genes (archaeal amoA, bacterial amoA, nirK, nirS, and nosZ). Elevated CO2 increased potential nitrification (+28%) and the abundance of bacterial amoA functional gene (+62%) in cropland ecosystems. Elevated CO2 increased potential denitrification when combined with N addition and higher precipitation (+116%). Elevated CO2 also increased the abundance of nirK (+25%) and nirS (+27%) functional genes in terrestrial ecosystems and of nosZ (+32%) functional gene in cropland ecosystems. The increase in the abundance of nosZ under elevated CO2 was larger at elevated temperature and high N (+62%). Four out of 14 two-way interactions tested between elevated CO2 and elevated temperature, elevated CO2 and increased precipitation, and elevated CO2 and N addition were marginally significant and mostly synergistic. The effects of elevated CO2 on potential nitrification and abundances of bacterial amoA and nirS functional genes increased with mean annual temperature and mean annual precipitation. Our meta-analysis thus suggests that warming and increased precipitation in large areas of the world could reinforce positive responses of nitrification and denitrification to elevated CO2 and urges the need for more investigations in the tropical zone and on interactive effects among multiple global change factors, as we may largely underestimate the effects of global change on soil N2 O emissions.
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Affiliation(s)
- Robin Gineyts
- Sorbonne Université, Université Paris Cité, UPEC, CNRS, INRAE, IRD, Institut d'Ecologie et des Sciences de l'Environnement de Paris, Paris, France
- AgroParisTech, Palaiseau, France
| | - Audrey Niboyet
- Sorbonne Université, Université Paris Cité, UPEC, CNRS, INRAE, IRD, Institut d'Ecologie et des Sciences de l'Environnement de Paris, Paris, France
- AgroParisTech, Palaiseau, France
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27
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Kim JY, Jang H, Lee YR, Kim K, Suleiman HO, Park CS, Shin BJ, Jung EY, Tae HS. Nanostructured Polyaniline Films Functionalized through Auxiliary Nitrogen Addition in Atmospheric Pressure Plasma Polymerization. Polymers (Basel) 2023; 15:polym15071626. [PMID: 37050242 PMCID: PMC10096981 DOI: 10.3390/polym15071626] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2023] [Revised: 03/22/2023] [Accepted: 03/22/2023] [Indexed: 04/14/2023] Open
Abstract
Polyaniline (PANI) was synthesized from liquid aniline, a nitrogen-containing aromatic compound, through the atmospheric pressure (AP) plasma process using a newly designed plasma jet array with wide spacing between plasma jets. To expand the area of the polymerized film, the newly proposed plasma jet array comprises three AP plasma jet devices spaced 7 mm apart in a triangular configuration and an electrodeless quartz tube capable of applying auxiliary gas in the center of the triangular plasma jets. The vaporized aniline monomer was synthesized into a PANI film using the proposed plasma array device. The effects of nitrogen gas addition on the morphological, chemical, and electrical properties of PANI films in AP argon plasma polymerization were examined. The iodine-doped PANI film was isolated from the atmosphere through encapsulation. The constant electrical resistance of the PANI film indicates that the conductive PANI film can achieve the desired resistance by controlling the atmospheric exposure time through encapsulation.
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Affiliation(s)
- Jae Young Kim
- School of Electronic and Electrical Engineering, College of IT Engineering, Kyungpook National University, Daegu 41566, Republic of Korea
| | - Hyojun Jang
- School of Electronic and Electrical Engineering, College of IT Engineering, Kyungpook National University, Daegu 41566, Republic of Korea
| | - Ye Rin Lee
- School of Electronic and Electrical Engineering, College of IT Engineering, Kyungpook National University, Daegu 41566, Republic of Korea
| | - Kangmin Kim
- School of Electronics Engineering, College of IT Engineering, Kyungpook National University, Daegu 41566, Republic of Korea
| | - Habeeb Olaitan Suleiman
- School of Electronic and Electrical Engineering, College of IT Engineering, Kyungpook National University, Daegu 41566, Republic of Korea
| | - Choon-Sang Park
- Department of Electrical Engineering, Milligan University, Johnson City, TN 37682, USA
| | - Bhum Jae Shin
- Department of Electronics Engineering, Sejong University, Seoul 05006, Republic of Korea
| | - Eun Young Jung
- School of Electronic and Electrical Engineering, College of IT Engineering, Kyungpook National University, Daegu 41566, Republic of Korea
- The Institute of Electronic Technology, College of IT Engineering, Kyungpook National University, Daegu 41566, Republic of Korea
| | - Heung-Sik Tae
- School of Electronic and Electrical Engineering, College of IT Engineering, Kyungpook National University, Daegu 41566, Republic of Korea
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28
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Li D, Liu Y, Yang X, Zhang X, Shi Z. Shrub encroachment alters plant trait response to nitrogen addition in a semi-arid grassland. Front Plant Sci 2023; 14:1103371. [PMID: 37008490 PMCID: PMC10064521 DOI: 10.3389/fpls.2023.1103371] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/20/2022] [Accepted: 03/03/2023] [Indexed: 06/19/2023]
Abstract
Encroachment of shrubs over large regions of arid and semi-arid grassland can affect grassland traits and growth under a background of increasing nitrogen (N) deposition. However, the effects of N input rates on species traits and the growth of shrubs on grasslands remain unclear. We examined the effects of six different N addition rates on the traits of Leymus chinensis in an Inner Mongolia grassland encroached by the leguminous shrub, Caragana microphylla. We randomly selected 20 healthy L. chinensis tillers within shrubs and 20 tillers between shrubs in each plot, measuring the plant height, number of leaves, leaf area, leaf N concentration per unit mass (LNCmass), and aboveground biomass. Our results showed that N addition significantly enhanced the LNCmass of L. chinensis. The aboveground biomass, heights, LNCmass, leaf area, and leaf number of plants within the shrubs were higher than those between shrubs. For L. chinensis growing between shrubs, the LNCmass and leaf area increased with N addition rates, leaf number and plant height had binomial linear relationships to N addition rates. However, the number of leaves, leaf areas and heights of plants within shrubs did not vary under various N addition rates. Structural Equation Modelling revealed N addition had an indirect effect on the leaf dry mass through the accumulation of LNCmass. These results indicate that the response of dominant species to N addition could be regulated by shrub encroachment and provide new insights into management of shrub encroached grassland in the context of N deposition.
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Affiliation(s)
- Dan Li
- Institute of Desertification Study, Institute of Ecological Conservation and Restoration, Chinese Academy of Forestry, Beijing, China
| | - Yanshu Liu
- Key Laboratory of Land Consolidation and Rehabilitation, Land Science and Technology Innovation Center, Land Consolidation and Rehabilitation Center, Ministry of Natural Resources, Beijing, China
| | - Xiaohui Yang
- Institute of Desertification Study, Institute of Ecological Conservation and Restoration, Chinese Academy of Forestry, Beijing, China
| | - Xiao Zhang
- Institute of Desertification Study, Institute of Ecological Conservation and Restoration, Chinese Academy of Forestry, Beijing, China
| | - Zhongjie Shi
- Institute of Desertification Study, Institute of Ecological Conservation and Restoration, Chinese Academy of Forestry, Beijing, China
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29
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Liu C, Duan N, Chen X, Li X, Zhao N, Cao W, Li H, Liu B, Tan F, Zhao X, Li Q. Transcriptome Profiling and Chlorophyll Metabolic Pathway Analysis Reveal the Response of Nitraria tangutorum to Increased Nitrogen. Plants (Basel) 2023; 12:895. [PMID: 36840241 PMCID: PMC9962214 DOI: 10.3390/plants12040895] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/18/2023] [Revised: 02/04/2023] [Accepted: 02/14/2023] [Indexed: 06/18/2023]
Abstract
To identify genes that respond to increased nitrogen and assess the involvement of the chlorophyll metabolic pathway and associated regulatory mechanisms in these responses, Nitraria tangutorum seedlings were subjected to four nitrogen concentrations (N0, N6, N36, and N60: 0, 6, 36, and 60 mmol·L-1 nitrogen, respectively). The N. tangutorum seedling leaf transcriptome was analyzed by high-throughput sequencing (Illumina HiSeq 4000), and 332,420 transcripts and 276,423 unigenes were identified. The numbers of differentially expressed genes (DEGs) were 4052 in N0 vs. N6, 6181 in N0 vs. N36, and 3937 in N0 vs. N60. Comparing N0 and N6, N0 and N36, and N0 and N60, we found 1101, 2222, and 1234 annotated DEGs in 113, 121, and 114 metabolic pathways, respectively, classified in the Kyoto Encyclopedia of Genes and Genomes database. Metabolic pathways with considerable accumulation were involved mainly in anthocyanin biosynthesis, carotenoid biosynthesis, porphyrin and chlorophyll metabolism, flavonoid biosynthesis, and amino acid metabolism. N36 increased δ-amino levulinic acid synthesis and upregulated expression of the magnesium chelatase H subunit, which promoted chlorophyll a synthesis. Hence, N36 stimulated chlorophyll synthesis rather than heme synthesis. These findings enrich our understanding of the N. tangutorum transcriptome and help us to research desert xerophytes' responses to increased nitrogen in the future.
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Affiliation(s)
- Chenggong Liu
- Research Institute of Forestry, Chinese Academy of Forestry, Beijing 100091, China
- Key Laboratory of Tree Breeding and Cultivation, National Forestry and Grassland Administration, Beijing 100091, China
| | - Na Duan
- Experimental Center of Desert Forestry, Chinese Academy of Forestry, Dengkou 015200, China
- National Long-Term Scientific Research Base of Ulan Buh Desert Comprehensive Control, National Forestry and Grassland Administration, Dengkou 015200, China
| | - Xiaona Chen
- Experimental Center of Desert Forestry, Chinese Academy of Forestry, Dengkou 015200, China
- National Long-Term Scientific Research Base of Ulan Buh Desert Comprehensive Control, National Forestry and Grassland Administration, Dengkou 015200, China
| | - Xu Li
- Research Institute of Forestry, Chinese Academy of Forestry, Beijing 100091, China
- Key Laboratory of Tree Breeding and Cultivation, National Forestry and Grassland Administration, Beijing 100091, China
| | - Naqi Zhao
- Experimental Center of Desert Forestry, Chinese Academy of Forestry, Dengkou 015200, China
- National Long-Term Scientific Research Base of Ulan Buh Desert Comprehensive Control, National Forestry and Grassland Administration, Dengkou 015200, China
| | - Wenxu Cao
- Research Institute of Forestry, Chinese Academy of Forestry, Beijing 100091, China
- Key Laboratory of Tree Breeding and Cultivation, National Forestry and Grassland Administration, Beijing 100091, China
| | - Huiqing Li
- Research Institute of Forestry, Chinese Academy of Forestry, Beijing 100091, China
- Key Laboratory of Tree Breeding and Cultivation, National Forestry and Grassland Administration, Beijing 100091, China
| | - Bo Liu
- Research Institute of Forestry, Chinese Academy of Forestry, Beijing 100091, China
- Key Laboratory of Tree Breeding and Cultivation, National Forestry and Grassland Administration, Beijing 100091, China
| | - Fengsen Tan
- Research Institute of Forestry, Chinese Academy of Forestry, Beijing 100091, China
- Key Laboratory of Tree Breeding and Cultivation, National Forestry and Grassland Administration, Beijing 100091, China
| | - Xiulian Zhao
- Research Institute of Forestry, Chinese Academy of Forestry, Beijing 100091, China
- Key Laboratory of Tree Breeding and Cultivation, National Forestry and Grassland Administration, Beijing 100091, China
| | - Qinghe Li
- Research Institute of Forestry, Chinese Academy of Forestry, Beijing 100091, China
- Key Laboratory of Tree Breeding and Cultivation, National Forestry and Grassland Administration, Beijing 100091, China
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30
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He J, Tan X, Nie Y, Ma L, Liu J, Lu X, Mo J, Leloup J, Nunan N, Ye Q, Shen W. Distinct Responses of Abundant and Rare Soil Bacteria to Nitrogen Addition in Tropical Forest Soils. Microbiol Spectr 2023; 11:e0300322. [PMID: 36622236 DOI: 10.1128/spectrum.03003-22] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
Soil microbial responses to anthropogenic nitrogen (N) enrichment at the overall community level has been extensively studied. However, the responses of community dynamics and assembly processes of the abundant versus rare bacterial taxa to N enrichment have rarely been assessed. Here, we present a study in which the effects of short- (2 years) and long-term (13 years) N additions to two nearby tropical forest sites on abundant and rare soil bacterial community composition and assembly were documented. The N addition, particularly in the long-term experiment, significantly decreased the bacterial α-diversity and shifted the community composition toward copiotrophic and N-sensitive species. The α-diversity and community composition of the rare taxa were more affected, and they were more closely clustered phylogenetically under N addition compared to the abundant taxa, suggesting the community assembly of the rare taxa was more governed by deterministic processes (e.g., environmental filtering). In contrast, the abundant taxa exhibited higher community abundance, broader environmental thresholds, and stronger phylogenetic signals under environmental changes than the rare taxa. Overall, these findings illustrate that the abundant and rare bacterial taxa respond distinctly to N addition in tropical forests, with higher sensitivity of the rare taxa, but potentially broader environmental acclimation of the abundant taxa. IMPORTANCE Atmospheric nitrogen (N) deposition is a worldwide environmental problem and threatens biodiversity and ecosystem functioning. Understanding the responses of community dynamics and assembly processes of abundant and rare soil bacterial taxa to anthropogenic N enrichment is vital for the management of N-polluted forest soils. Our sequence-based data revealed distinct responses in bacterial diversity, community composition, environmental acclimation, and assembly processes between abundant and rare taxa under N-addition soils in tropical forests. These findings provide new insight into the formation and maintenance of bacterial diversity and offer a way to better predict bacterial responses to the ongoing atmospheric N deposition in tropical forests.
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31
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He Y, Zhou X, Jia Z, Zhou L, Chen H, Liu R, Du Z, Zhou G, Shao J, Ding J, Chen K, Hartley IP. Apparent thermal acclimation of soil heterotrophic respiration mainly mediated by substrate availability. Glob Chang Biol 2023; 29:1178-1187. [PMID: 36371668 DOI: 10.1111/gcb.16523] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2022] [Accepted: 10/07/2022] [Indexed: 06/16/2023]
Abstract
Multiple lines of existing evidence suggest that increasing CO2 emission from soils in response to rising temperature could accelerate global warming. However, in experimental studies, the initial positive response of soil heterotrophic respiration (RH ) to warming often weakens over time (referred to apparent thermal acclimation). If the decreased RH is driven by thermal adaptation of soil microbial community, the potential for soil carbon (C) losses would be reduced substantially. In the meanwhile, the response could equally be caused by substrate depletion, and would then reflect the gradual loss of soil C. To address uncertainties regarding the causes of apparent thermal acclimation, we carried out sterilization and inoculation experiments using the soil samples from an alpine meadow with 6 years of warming and nitrogen (N) addition. We demonstrate that substrate depletion, rather than microbial adaptation, determined the response of RH to long-term warming. Furthermore, N addition appeared to alleviate the apparent acclimation of RH to warming. Our study provides strong empirical support for substrate availability being the cause of the apparent acclimation of soil microbial respiration to temperature. Thus, these mechanistic insights could facilitate efforts of biogeochemical modeling to accurately project soil C stocks in the future climate.
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Affiliation(s)
- Yanghui He
- Northeast Asia ecosystem Carbon sink research Center (NACC), Center for Ecological Research, Key Laboratory of Sustainable Forest Ecosystem Management-Ministry of Education, School of Forestry, Northeast Forestry University, Harbin, China
| | - Xuhui Zhou
- Northeast Asia ecosystem Carbon sink research Center (NACC), Center for Ecological Research, Key Laboratory of Sustainable Forest Ecosystem Management-Ministry of Education, School of Forestry, Northeast Forestry University, Harbin, China
- Center for Global Change and Ecological Forecasting, School of Ecological and Environmental Sciences, East China Normal University, Shanghai, China
| | - Zhen Jia
- Center for Global Change and Ecological Forecasting, School of Ecological and Environmental Sciences, East China Normal University, Shanghai, China
| | - Lingyan Zhou
- Center for Global Change and Ecological Forecasting, School of Ecological and Environmental Sciences, East China Normal University, Shanghai, China
| | - Hongyang Chen
- Northeast Asia ecosystem Carbon sink research Center (NACC), Center for Ecological Research, Key Laboratory of Sustainable Forest Ecosystem Management-Ministry of Education, School of Forestry, Northeast Forestry University, Harbin, China
| | - Ruiqiang Liu
- Northeast Asia ecosystem Carbon sink research Center (NACC), Center for Ecological Research, Key Laboratory of Sustainable Forest Ecosystem Management-Ministry of Education, School of Forestry, Northeast Forestry University, Harbin, China
| | - Zhenggang Du
- Northeast Asia ecosystem Carbon sink research Center (NACC), Center for Ecological Research, Key Laboratory of Sustainable Forest Ecosystem Management-Ministry of Education, School of Forestry, Northeast Forestry University, Harbin, China
| | - Guiyao Zhou
- Center for Global Change and Ecological Forecasting, School of Ecological and Environmental Sciences, East China Normal University, Shanghai, China
| | - Junjiong Shao
- College of Forestry and Biotechnology, Zhejiang A&F University, Hangzhou, China
| | - Junxia Ding
- Northeast Asia ecosystem Carbon sink research Center (NACC), Center for Ecological Research, Key Laboratory of Sustainable Forest Ecosystem Management-Ministry of Education, School of Forestry, Northeast Forestry University, Harbin, China
| | - Kelong Chen
- Qinghai Province Key Laboratory of Physical Geography and Environmental Process, College of Geographic Science, Qinghai Normal University, Xining, China
| | - Iain P Hartley
- Geography, College of Life and Environmental Sciences, University of Exeter, Exeter, UK
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32
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Ke Y, Yu Q, Wang H, Zhao Y, Jia X, Yang Y, Zhang Y, Zhou W, Wu H, Xu C, Sun T, Gao Y, Jentsch A, He N, Yu G. The potential bias of nitrogen deposition effects on primary productivity and biodiversity. Glob Chang Biol 2023; 29:1054-1061. [PMID: 36408718 DOI: 10.1111/gcb.16530] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/22/2022] [Revised: 11/11/2022] [Accepted: 11/17/2022] [Indexed: 06/16/2023]
Abstract
Atmospheric nitrogen (N) deposition is composed of both inorganic nitrogen (IN) and organic nitrogen (ON), and these sources of N may exhibit different impacts on ecosystems. However, our understanding of the impacts of N deposition is largely based on experimental gradients of INs or more rarely ONs. Thus, the effects of N deposition on ecosystem productivity and biodiversity may be biased. We explored the differential impacts of N addition with different IN:ON ratios (0:10, 3:7, 5:5, 7:3, and 10:0) on aboveground net primary productivity (ANPP) of plant community and plant diversity in a typical temperate grassland with a long-term N addition experiment. Soil pH, litter biomass, soil IN concentration, and light penetration were measured to examine the potential mechanisms underlying species loss with N addition. Our results showed that N addition significantly increased plant community ANPP by 68.33%-105.50% and reduced species richness by 16.20%-37.99%. The IN:ON ratios showed no significant effects on plant community ANPP. However, IN-induced species richness loss was about 2.34 times of ON-induced richness loss. Soil pH was positively related to species richness, and they exhibited very similar response patterns to IN:ON ratios. It implies that soil acidification accounts for the different magnitudes of species loss with IN and ON additions. Overall, our study suggests that it might be reasonable to evaluate the effects of N deposition on plant community ANPP with either IN or ON addition. However, the evaluation of N deposition on biodiversity might be overestimated if only IN is added or underestimated if only ON is added.
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Affiliation(s)
- Yuguang Ke
- National Hulunber Grassland Ecosystem Observation and Research Station, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Qiang Yu
- School of Grassland Science, Beijing Forestry University, Beijing, China
| | - Hongqiang Wang
- National Hulunber Grassland Ecosystem Observation and Research Station, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Yi Zhao
- School of Grassland Science, Beijing Forestry University, Beijing, China
| | - Xiaotong Jia
- National Hulunber Grassland Ecosystem Observation and Research Station, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Yadong Yang
- National Hulunber Grassland Ecosystem Observation and Research Station, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Yunlong Zhang
- College of Grassland Science and Technology, China Agricultural University, Beijing, China
| | - Wei Zhou
- National Hulunber Grassland Ecosystem Observation and Research Station, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Honghui Wu
- National Hulunber Grassland Ecosystem Observation and Research Station, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Chong Xu
- National Hulunber Grassland Ecosystem Observation and Research Station, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Tao Sun
- Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, China
| | - Yingzhi Gao
- Key Laboratory of Vegetation Ecology, Ministry of Education, Jilin Songnen Grassland Ecosystem National Observation and Research Station, Institute of Grassland Science, Northeast Normal University, Changchun, China
| | - Anke Jentsch
- Disturbance Ecology, Bayreuth Center of Ecology and Environmental Research, University of Bayreuth, Bayreuth, Germany
| | - Nianpeng He
- Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, China
| | - Guirui Yu
- Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, China
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33
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Carrell AA, Hicks BB, Sidelinger E, Johnston ER, Jawdy SS, Clark MM, Klingeman DM, Cregger MA. Nitrogen addition alters soil fungal communities, but root fungal communities are resistant to change. Front Microbiol 2023; 13:1033631. [PMID: 36762095 PMCID: PMC9905728 DOI: 10.3389/fmicb.2022.1033631] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Accepted: 12/16/2022] [Indexed: 01/26/2023] Open
Abstract
Plants are colonized by numerous microorganisms serving important symbiotic functions that are vital to plant growth and success. Understanding and harnessing these interactions will be useful in both managed and natural ecosystems faced with global change, but it is still unclear how variation in environmental conditions and soils influence the trajectory of these interactions. In this study, we examine how nitrogen addition alters plant-fungal interactions within two species of Populus - Populus deltoides and P. trichocarpa. In this experiment, we manipulated plant host, starting soil (native vs. away for each tree species), and nitrogen addition in a fully factorial replicated design. After ~10 weeks of growth, we destructively harvested the plants and characterized plant growth factors and the soil and root endosphere fungal communities using targeted amplicon sequencing of the ITS2 gene region. Overall, we found nitrogen addition altered plant growth factors, e.g., plant height, chlorophyll density, and plant N content. Interestingly, nitrogen addition resulted in a lower fungal alpha diversity in soils but not plant roots. Further, there was an interactive effect of tree species, soil origin, and nitrogen addition on soil fungal community composition. Starting soils collected from Oregon and West Virginia were dominated by the ectomycorrhizal fungi Inocybe (55.8% relative abundance), but interestingly when P. deltoides was grown in its native West Virginia soil, the roots selected for a high abundance of the arbuscular mycorrhizal fungi, Rhizophagus. These results highlight the importance of soil origin and plant species on establishing plant-fungal interactions.
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Affiliation(s)
- Alyssa A. Carrell
- Biosciences Division, Oak Ridge National Laboratory, Oak Ridge, TN, United States
| | - Brittany B. Hicks
- Department of Civil and Environmental Engineering, University of Michigan, Ann Arbor, MI, United States
| | - Emilie Sidelinger
- Department of Environmental Engineering and Earth Sciences, Clemson University, Clemson, SC, United States
| | - Eric R. Johnston
- Biosciences Division, Oak Ridge National Laboratory, Oak Ridge, TN, United States
| | - Sara S. Jawdy
- Biosciences Division, Oak Ridge National Laboratory, Oak Ridge, TN, United States
| | - Miranda M. Clark
- Biosciences Division, Oak Ridge National Laboratory, Oak Ridge, TN, United States
| | - Dawn M. Klingeman
- Biosciences Division, Oak Ridge National Laboratory, Oak Ridge, TN, United States
| | - Melissa A. Cregger
- Biosciences Division, Oak Ridge National Laboratory, Oak Ridge, TN, United States,*Correspondence: Melissa A. Cregger ✉
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Zhang J, Zuo X, Lv P. Effects of Grazing, Extreme Drought, Extreme Rainfall and Nitrogen Addition on Vegetation Characteristics and Productivity of Semiarid Grassland. Int J Environ Res Public Health 2023; 20:960. [PMID: 36673715 PMCID: PMC9859310 DOI: 10.3390/ijerph20020960] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/11/2022] [Revised: 12/13/2022] [Accepted: 12/15/2022] [Indexed: 06/17/2023]
Abstract
Grassland use patterns, water and nutrients are the main determinants of ecosystem structure and function in semiarid grasslands. However, few studies have reported how the interactive effects of rainfall changes and nitrogen deposition influence the recovery of semiarid grasslands degraded by grazing. In this study, a simulated grazing, increasing and decreasing rainfall, nitrogen deposition test platform was constructed, and the regulation mechanism of vegetation characteristics and productivity were studied. We found that grazing decreased plant community height (CWMheight) and litter and increased plant density. Increasing rainfall by 60% from May to August (+60%) increased CWMheight; decreasing rainfall by 60% from May to August (-60%) and by 100% from May to June (-60 d) decreased CWMheight and coverage; -60 d, +60% and increasing rainfall by 100% from May to June (+60 d) increased plant density; -60% increased the Simpson dominance index (D index) but decreased the Shannon-Wiener diversity index (H index); -60 d decreased the aboveground biomass (ABG), and -60% increased the underground biomass (BGB) in the 10-60 cm layer. Nitrogen addition decreased species richness and the D index and increased the H index and AGB. Rainfall and soil nitrogen directly affect AGB; grazing and rainfall can also indirectly affect AGB by inducing changes in CWMheight; grazing indirectly affects BGB by affecting plant density and soil nitrogen. The results of this study showed that in the semiarid grassland of Inner Mongolia, grazing in the nongrowing season and grazing prohibition in the growing season can promote grassland recovery, continuous drought in the early growing season will have dramatic impacts on productivity, nitrogen addition has a certain impact on the species composition of vegetation, and the impact on productivity will not appear in the short term.
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Affiliation(s)
| | - Xiaoan Zuo
- Northwest Institute of Eco-Environmental and Resources, Chinese Academy of Sciences, Lanzhou 730000, China
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35
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Zhang XQ, Zeng QX, Yuan XC, Wan XH, Cui JY, Li WZ, Lin HY, Xie H, Chen WW, Wu JM, Chen YM. Phosphorus limitation induced by nitrogen addition changed soil microbial community structure in a subtropical Pinus taiwanensis forest. Ying Yong Sheng Tai Xue Bao 2023; 34:203-212. [PMID: 36799395 DOI: 10.13287/j.1001-9332.202301.042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 02/18/2023]
Abstract
Soil microorganisms play an important role in the biogeochemical cycles of terrestrial ecosystems. How-ever, it is still unclear how the amount and duration of nitrogen (N) addition affect soil microbial community structure and whether there is a correlation between the changes in microbial community structure and their nutrient limi-tation status. In this study, we conducted an N addition experiment in a subtropical Pinus taiwanensis forest to simulate N deposition with three treatments: control (CK, 0 kg N·hm-2·a-1), low N (LN, 40 kg N·hm-2·a-1), and high N (HN, 80 kg N·hm-2·a-1). Basic soil physicochemical properties, phospholipid fatty acids content, and carbon (C), N and phosphorus (P) acquisition enzyme activities were measured after one and three years of N addition. The relative nutrient limitation status of soil microorganisms was analyzed using ecological enzyme stoichiometry. The results showed that one-year N addition did not affect soil microbial community structure. Three-year LN treatment significantly increased the contents of Gram-positive bacteria (G+), Gram-negative bacteria (G-), actinomycetes (ACT), and total phospholipid fatty acids (TPLFA), whereas three-year HN treatment did not significantly affect soil microbial community, indicating that bacteria and ACT might be more sensitive to N addition. Nitrogen addition exacerbated soil C and P limitation. Phosphorus limitation was the optimal explanatory factor for the changes in soil microbial community structure. It suggested that P limitation induced by N addition might be more beneficial for the growth of certain oligotrophic bacteria (e.g. G+) and the microorganisms participating in the P cycling (e.g. ACT), with consequences on soil microbial community structure of subtropical Pinus taiwanensis forest.
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Affiliation(s)
- Xiao-Qing Zhang
- Cultivation Base of State Key Laboratory of Humid Subtropical Mountain Ecology, Fujian Normal University, Fuzhou 350007, China.,School of Geographical Science, Fujian Normal University, Fuzhou 350007, China
| | - Quan-Xin Zeng
- Cultivation Base of State Key Laboratory of Humid Subtropical Mountain Ecology, Fujian Normal University, Fuzhou 350007, China.,School of Geographical Science, Fujian Normal University, Fuzhou 350007, China
| | - Xiao-Cun Yuan
- Cultivation Base of State Key Laboratory of Humid Subtropical Mountain Ecology, Fujian Normal University, Fuzhou 350007, China.,School of Geographical Science, Fujian Normal University, Fuzhou 350007, China.,College of Tourism, Wuyi University, Wuyishan 354300, Fujian, China
| | - Xiao-Hua Wan
- Cultivation Base of State Key Laboratory of Humid Subtropical Mountain Ecology, Fujian Normal University, Fuzhou 350007, China.,School of Geographical Science, Fujian Normal University, Fuzhou 350007, China
| | - Ju-Yan Cui
- Cultivation Base of State Key Laboratory of Humid Subtropical Mountain Ecology, Fujian Normal University, Fuzhou 350007, China.,School of Geographical Science, Fujian Normal University, Fuzhou 350007, China
| | - Wen-Zhou Li
- Daiyun Mountain National Nature Reserve Administration Bureau, Quanzhou 362500, Fujian, China
| | - Hui-Ying Lin
- Cultivation Base of State Key Laboratory of Humid Subtropical Mountain Ecology, Fujian Normal University, Fuzhou 350007, China.,School of Geographical Science, Fujian Normal University, Fuzhou 350007, China
| | - Huan Xie
- Cultivation Base of State Key Laboratory of Humid Subtropical Mountain Ecology, Fujian Normal University, Fuzhou 350007, China.,School of Geographical Science, Fujian Normal University, Fuzhou 350007, China
| | - Wen-Wei Chen
- Daiyun Mountain National Nature Reserve Administration Bureau, Quanzhou 362500, Fujian, China
| | - Jun-Mei Wu
- Cultivation Base of State Key Laboratory of Humid Subtropical Mountain Ecology, Fujian Normal University, Fuzhou 350007, China.,School of Geographical Science, Fujian Normal University, Fuzhou 350007, China
| | - Yueh-Min Chen
- Cultivation Base of State Key Laboratory of Humid Subtropical Mountain Ecology, Fujian Normal University, Fuzhou 350007, China.,School of Geographical Science, Fujian Normal University, Fuzhou 350007, China
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36
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Sun P, Cheng R, Xiao W, Zeng L, Shen Y, Wang L, Chen T, Zhang M. The Relationship between Ectomycorrhizal Fungi, Nitrogen Deposition, and Pinus massoniana Seedling Nitrogen Transporter Gene Expression and Nitrogen Uptake Kinetics. J Fungi (Basel) 2022; 9. [PMID: 36675886 DOI: 10.3390/jof9010065] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2022] [Revised: 12/19/2022] [Accepted: 12/28/2022] [Indexed: 01/03/2023] Open
Abstract
Analyzing the molecular and physiological processes that govern the uptake and transport of nitrogen (N) in plants is central to efforts to fully understand the optimization of plant N use and the changes in the N-use efficiency in relation to changes in atmospheric N deposition changes. Here, a field experiment was conducted using the ectomycorrhizal fungi (EMF), Pisolithus tinctorius (Pt) and Suillus grevillei (Sg). The effects of N deposition were investigated using concentrations of 0 kg·N·hm-2a-1 (N0), a normal N deposition of 30 kg·N·hm-2a-1 (N30), a moderate N deposition of 60 kg·N·hm-2a-1 (N60), and a severe N deposition of 90 kg·N·hm-2a-1 (N90), with the goal of examining how these factors impacted root activity, root absorbing area, NH4+ and NO3- uptake kinetics, and the expression of ammonium and nitrate transporter genes in Pinus massoniana seedlings under different levels of N deposition. These data revealed that EMF inoculation led to increased root dry weight, activity, and absorbing area. The NH4+ and NO3- uptake kinetics in seedlings conformed to the Michaelis-Menten equation, and uptake rates declined with increasing levels of N addition, with NH4+ uptake rates remaining higher than NO3- uptake rates for all tested concentrations. EMF inoculation was associated with higher Vmax values than were observed for non-mycorrhizal plants. Nitrogen addition resulted in the upregulation of genes in the AMT1 family and the downregulation of genes in the NRT family. EMF inoculation under the N60 and N90 treatment conditions resulted in the increased expression of each of both these gene families. NH4+ and NO3- uptake kinetics were also positively correlated with associated transporter gene expression in P. massoniana roots. Together, these data offer a theoretical foundation for EMF inoculation under conditions of increased N deposition associated with climate change in an effort to improve N absorption and transport rates through the regulation of key nitrogen transporter genes, thereby enhancing N utilization efficiency and promoting plant growth. Synopsis: EMF could enhance the efficiency of N utilization and promote the growth of Pinus massoniana under conditions of increased N deposition.
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Ma CX, Zhou GS, Song XY, Lyu XM. [Effects of warming, photoperiod, and nitrogen addition on the main phenological phases of Quercus mongolica]. Ying Yong Sheng Tai Xue Bao 2022; 33:3220-3228. [PMID: 36601825 DOI: 10.13287/j.1001-9332.202212.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
With a large artificial climate chamber, we examined the effects of warming (control, +1.5 ℃, +2.0 ℃), photoperiod (10, 14, 18 h) and nitrogen addition (0, 5, 10, 20 g N·m-2·a-1) on the main phenological phases of Quercus mongolica in Northeast China. The results showed that 1.5 and 2.0 ℃ warming significantly advanced the bud swelling stage and delayed the leaf fully coloring stage, which prolonged the growing season. The extended days increased with the increases of warming range. Photoperiod significantly affected autumn phenology (leaf coloration onset stage, leaf coloration in general stage, leaf fully coloring stage). Compared with photoperiod of 14 h, short photoperiod (10 h) significantly delayed leaf coloration onset stage by 7.0 d, and prolonged the peak of growth season. Nitrogen addition significantly advanced the bud swelling stage, bud opening stage, first leaf unfolding stage and full leaf unfolding stage. The leaf fully coloring stage was significantly delayed by 9.5 d only at the high nitrogen level of 20 g N·m-2·a-1, indicating that high nitrogen addition prolonged the growing season of Q. mongolica. The synergistic effects of warming and high nitrogen addition (20 g N·m-2·a-1) significantly delayed the leaf fully coloring stage, which prolonged leaf coloration stage, and the synergistic effects of warming and short photoperiod, the synergistic effects of nitrogen addition and short photoperiod. The synergistic effects of warming, nitrogen addition and short photoperiod all significantly delayed the leaf coloration onset stage, which relatively prolonged the peak of growing season.
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Affiliation(s)
- Cheng-Xiang Ma
- School of Earth Science and Technology, Zhengzhou University, Zhengzhou 450001, China.,Joint Laboratory of Eco-Meteorology, Chinese Academy of Meteorological Sciences, Zhengzhou University, Zhengzhou 450001, China
| | - Guang-Sheng Zhou
- Joint Laboratory of Eco-Meteorology, Chinese Academy of Meteorological Sciences, Zhengzhou University, Zhengzhou 450001, China.,State Key Laboratory of Disaster Weather, Chinese Academy of Meteorological Sciences, Beijing 100081, China
| | - Xing-Yang Song
- State Key Laboratory of Disaster Weather, Chinese Academy of Meteorological Sciences, Beijing 100081, China
| | - Xiao-Min Lyu
- Joint Laboratory of Eco-Meteorology, Chinese Academy of Meteorological Sciences, Zhengzhou University, Zhengzhou 450001, China.,State Key Laboratory of Disaster Weather, Chinese Academy of Meteorological Sciences, Beijing 100081, China
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Wang L, Shen Y, Cheng R, Xiao W, Zeng L, Sun P, Chen T, Zhang M. Nitrogen addition promotes early-stage and inhibits late-stage decomposition of fine roots in Pinus massoniana plantation. Front Plant Sci 2022; 13:1048153. [PMID: 36452109 PMCID: PMC9701838 DOI: 10.3389/fpls.2022.1048153] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/19/2022] [Accepted: 10/24/2022] [Indexed: 06/17/2023]
Abstract
Increasing atmospheric nitrogen (N) deposition has a profound impact on the ecosystem functions and processes. Fine root decomposition is an important pathway for the reentry of nutrients into the soil. However, the effect of N addition on root decomposition and its potential mechanism is not well understood with respect to root branch orders. In this study, we conducted a 30-month decomposition experiment of fine roots under different concentrations of N addition treatments (0, 30, 60, and 90 kg N ha-1 year-1, respectively) in a typical Pinus massoniana plantation in the Three Gorges Reservoir Area of China. In the early stage of decomposition (0-18 months), N addition at all concentrations promoted the decomposition of fine roots, and the average decomposition rates of order 1-2, order 3-4, order 5-6 fine roots were increased by 13.54%, 6.15% and 7.96% respectively. In the late stage of decomposition (18-30 months), high N addition inhibited the decomposition of fine root, and the average decomposition rates of order 1-2, order 3-4, order 5-6 fine roots were decreased by 58.35%, 35.43% and 47.56% respectively. At the same time, N addition promoted the release of lignin, carbon (C), N, and phosphorus (P) in the early-stage, whereas high N addition inhibited the release of lignin, C, N, and the activities of lignin-degrading enzyme (peroxidase and polyphenol oxidase) in the late-stage. The decomposition constant (k) was significantly correlated with the initial chemical quality of the fine roots and lignin-degrading enzyme activities. The higher-order (order 3-4 and order 5-6) fine roots decomposed faster than lower-order (order 1-2) fine roots due to higher initial cellulose, starch, sugar, C concentrations and higher C/N, C/P, lignin/N ratios and lower N, P concentrations. In addition, low N (30 kg N ha-1 year-1) treatments decreased soil organic matter content, whereas high N (90 kg N ha-1 year-1) treatment had the opposite effect. All the N treatments reduced soil pH and total P content, indicating that increased N deposition may led to soil acidification. Our findings indicated that the effect of N addition on decomposition varied with the decomposition stages. The decomposition difference between the lower-order and higher-order fine roots were controlled strongly by the initial chemical quality of the fine roots. This study provides new insights into understanding and predicting possible changes in plant root decomposition and soil properties in the future atmospheric N deposition increase scenarios.
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Affiliation(s)
- Lijun Wang
- Key Laboratory of Forest Ecology and Environment, National Forestry and Grassland Administration, Ecology and Nature Conservation Institute, Chinese Academy of Forestry, Beijing, China
| | - Yafei Shen
- Key Laboratory of Forest Ecology and Environment, National Forestry and Grassland Administration, Ecology and Nature Conservation Institute, Chinese Academy of Forestry, Beijing, China
- Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing, China
| | - Ruimei Cheng
- Key Laboratory of Forest Ecology and Environment, National Forestry and Grassland Administration, Ecology and Nature Conservation Institute, Chinese Academy of Forestry, Beijing, China
- Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing, China
| | - Wenfa Xiao
- Key Laboratory of Forest Ecology and Environment, National Forestry and Grassland Administration, Ecology and Nature Conservation Institute, Chinese Academy of Forestry, Beijing, China
- Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing, China
| | - Lixiong Zeng
- Key Laboratory of Forest Ecology and Environment, National Forestry and Grassland Administration, Ecology and Nature Conservation Institute, Chinese Academy of Forestry, Beijing, China
- Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing, China
| | - Pengfei Sun
- Key Laboratory of Forest Ecology and Environment, National Forestry and Grassland Administration, Ecology and Nature Conservation Institute, Chinese Academy of Forestry, Beijing, China
| | - Tian Chen
- Key Laboratory of Forest Ecology and Environment, National Forestry and Grassland Administration, Ecology and Nature Conservation Institute, Chinese Academy of Forestry, Beijing, China
| | - Meng Zhang
- Key Laboratory of Forest Ecology and Environment, National Forestry and Grassland Administration, Ecology and Nature Conservation Institute, Chinese Academy of Forestry, Beijing, China
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Su XX, Li XL, Li CY, Sun HF. [Effect of Nitrogen Addition on Soil Fungal Diversity in a Degraded Alpine Meadow at Different Slopes]. Huan Jing Ke Xue 2022; 43:5286-5293. [PMID: 36437100 DOI: 10.13227/j.hjkx.202201259] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
This study proposed nitrogen addition experiments to analyze the effects of exogenous nitrogen addition on soil fungal diversity in alpine meadow. All the experiments were performed in degraded alpine meadow with two different slopes (gentle slope and steep slope) in Guoluo Prefecture of the Sanjiangyuan Region, and the sequence and analysis of ITS of soil fungi were performed using MiSeq PE250 sequencing technology. Comparative analysis was carried out with three nitrogen addition levels on soil fungal diversity in degraded grassland with different slopes, which included low nitrogen (LN, 2 g·m-2), middle nitrogen (MN, 5 g·m-2), and high nitrogen (HN, 10 g·m-2). The results showed that:① the distribution groups of fungi in the soil were Ascomycota, Basidiomycota, Mortierellomycota, and Glomomycota, and the dominant bacteria was Ascomycota. ② The dominant genera were Mortierella and Archaeorhizomyces, and there were no differences in response to different slopes and nitrogen addition levels. ③ A total of 95 genera (Gibberellum, Preussia, etc.) were identified and significantly differed between two different slopes (P<0.05). ④ Bacteria with a relative abundance less than 1% had significant differences in nitrogen addition at different levels on the same slope (P<0.05). 5 In addition, the analyses of α and β diversities showed that soil fungal community structure was stable under different slopes and nitrogen addition levels. Exogenous nitrogen supplementation significantly improved the relative abundance of non-dominant fungal communities without destroying soil fungal community structure.
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Affiliation(s)
- Xiao-Xue Su
- College of Agriculture and Animal Husbandry, Qinghai University, Xining 810016, China
| | - Xi-Lai Li
- College of Agriculture and Animal Husbandry, Qinghai University, Xining 810016, China
| | - Cheng-Yi Li
- College of Agriculture and Animal Husbandry, Qinghai University, Xining 810016, China
| | - Hua-Fang Sun
- College of Agriculture and Animal Husbandry, Qinghai University, Xining 810016, China
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Zhang L, Zhao L, Yi H, Lan S, Chen L, Han G. Nitrogen addition alters plant growth in China's Yellow River Delta coastal wetland through direct and indirect effects. Front Plant Sci 2022; 13:1016949. [PMID: 36311116 PMCID: PMC9606764 DOI: 10.3389/fpls.2022.1016949] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/11/2022] [Accepted: 09/12/2022] [Indexed: 06/16/2023]
Abstract
In the coastal wetland, nitrogen is a limiting element for plant growth and reproduction. However, nitrogen inputs increase annually due to the rise in nitrogen emissions from human activity in coastal wetlands. Nitrogen additions may alter the coastal wetlands' soil properties, bacterial compositions, and plant growth. The majority of nitrogen addition studies, however, are conducted in grasslands and forests, and the relationship between soil properties, bacterial compositions, and plant growth driven by nitrogen addition is poorly understood in coastal marshes. We conducted an experiment involving nitrogen addition in the Phragmites australis population of the tidal marsh of the Yellow River Delta. Since 2017, four nitrogen addition levels (N0:0 g • m-2 • year-1, N1:5 g • m-2 • year-1, N2:20 g • m-2 • year-1, N3:50 g • m-2 • year-1) have been established in the experiment. From 2017 to 2020, we examined soil properties and plant traits. In 2018, we also measured soil bacterial composition. We analyzed the effect of nitrogen addition on soil properties, plant growth, reproduction, and plant nutrients using linear mixed-effect models. Moreover, structural equation modeling (SEM) was utilized to determine the direct and indirect effects of nitrogen addition, soil properties, and bacterial diversity on plant growth. The results demonstrated that nitrogen addition significantly affected plant traits of P. australis. N1 and N2 levels generally resulted in higher plant height, diameter, leaf length, leaf breadth, and leaf TC than N0 and N3 levels. Nitrogen addition had significantly impacted soil properties, including pH, salinity, soil TC, and soil TS. The SEM revealed that nitrogen addition had a direct and positive influence on plant height. By modifying soil bacterial diversity, nitrogen addition also had an small indirect and positive impact on plant height. However, nitrogen addition had a great negative indirect impact on plant height through altering soil properties. Thus, nitrogen inputs may directly enhance the growth of P. australis at N1 and N2 levels. Nonetheless, the maximum nitrogen addition (N3) may impede P. australis growth by reducing soil pH. Therefore, to conserve the coastal tidal marsh, it is recommended that an excess of nitrogen input be regulated.
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Affiliation(s)
- Liwen Zhang
- Tianjin Key Laboratory of Animal and Plant Resistance, College of Life Sciences, Tianjin Normal University, Tianjin, China
- Chinese Academy of Sciences (CAS) Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research (YIC), Chinese Academy of Sciences (CAS) Shandong Key Laboratory of Coastal Environmental Processes, YICCAS Yellow River Delta Field Observation and Research Station of Coastal Wetland Ecosystem, YICCAS, Yantai, China
| | - Lianjun Zhao
- Chinese Academy of Sciences (CAS) Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research (YIC), Chinese Academy of Sciences (CAS) Shandong Key Laboratory of Coastal Environmental Processes, YICCAS Yellow River Delta Field Observation and Research Station of Coastal Wetland Ecosystem, YICCAS, Yantai, China
- School of Resources and Environmental Engineering, Ludong University, Yantai, China
| | - Huapeng Yi
- School of Resources and Environmental Engineering, Ludong University, Yantai, China
| | - Siqun Lan
- Chinese Academy of Sciences (CAS) Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research (YIC), Chinese Academy of Sciences (CAS) Shandong Key Laboratory of Coastal Environmental Processes, YICCAS Yellow River Delta Field Observation and Research Station of Coastal Wetland Ecosystem, YICCAS, Yantai, China
- School of Resources and Environmental Engineering, Ludong University, Yantai, China
| | - Lin Chen
- Chinese Academy of Sciences (CAS) Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research (YIC), Chinese Academy of Sciences (CAS) Shandong Key Laboratory of Coastal Environmental Processes, YICCAS Yellow River Delta Field Observation and Research Station of Coastal Wetland Ecosystem, YICCAS, Yantai, China
- College of Environment and Planning, Liaocheng University, Liaocheng, China
| | - Guangxuan Han
- Chinese Academy of Sciences (CAS) Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research (YIC), Chinese Academy of Sciences (CAS) Shandong Key Laboratory of Coastal Environmental Processes, YICCAS Yellow River Delta Field Observation and Research Station of Coastal Wetland Ecosystem, YICCAS, Yantai, China
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Dai H, Zeng QX, Zhou JC, Peng YZ, Sun XQ, Chen JQ, Chen WW, Chen YM. [Responses of soil microbial carbon use efficiency to short-term nitrogen addition in Castanopsis fabri forest]. Ying Yong Sheng Tai Xue Bao 2022; 33:2611-2618. [PMID: 36384594 DOI: 10.13287/j.1001-9332.202210.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
As an important parameter regulating soil carbon mineralization, microbial carbon use efficiency (CUE) is essential for the understanding of carbon (C) cycle in terrestrial ecosystems. Three nitrogen supplemental levels, including control (0 kg N·hm-2·a-1), low nitrogen (40 kg N·hm-2·a-1), and high nitrogen (80 kg N·hm-2·a-1), were set up in a Castanopsis fabri forest in the Daiyun Mountain. The basic physical and chemical properties, organic carbon fractions, microbial biomass, and enzyme activities of the soil surface layer (0-10 cm) were measured. To examine the effects of increasing N deposition on microbial CUE and its influencing factors, soil microbial CUE was measured by the 18O-labelled-water approach. The results showed that short-term N addition significantly reduced microbial respiration rate and the activities of C and N acquisition enzymes, but significantly increased soil microbial CUE. β-N-acetyl amino acid glucosidase (NAG)/microbial biomass carbon (MBC), microbial respiration rate, β-glucosidase (BG)/MBC, cellulose hydrolase (CBH)/MBC, and soil organic carbon content were the main factors affecting CUE. Moreover, CUE significantly and negatively correlated with NAG/MBC, microbial respiration rate, BG/MBC, and CBH/MBC, but significantly and positively correlated with soil organic carbon. In summary, short-term N addition reduced the cost of soil microbial acquisition of C and N and microbial respiration, and thus increased soil microbial CUE, which would increase soil carbon sequestration potential of the C. fabri forest.
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Affiliation(s)
- Hui Dai
- School of Geographical Science, Fujian Normal University, Fuzhou 350007, China
- Key Laboratory of Humid Sub-tropical Eco-geographical Process of Ministry of Education, Fujian Normal University, Fuzhou 350007, China
| | - Quan-Xin Zeng
- School of Geographical Science, Fujian Normal University, Fuzhou 350007, China
- Key Laboratory of Humid Sub-tropical Eco-geographical Process of Ministry of Education, Fujian Normal University, Fuzhou 350007, China
| | - Jia-Cong Zhou
- School of Geographical Science, Fujian Normal University, Fuzhou 350007, China
- Key Laboratory of Humid Sub-tropical Eco-geographical Process of Ministry of Education, Fujian Normal University, Fuzhou 350007, China
| | - Yuan-Zhen Peng
- School of Geographical Science, Fujian Normal University, Fuzhou 350007, China
- Key Laboratory of Humid Sub-tropical Eco-geographical Process of Ministry of Education, Fujian Normal University, Fuzhou 350007, China
| | - Xue-Qi Sun
- School of Geographical Science, Fujian Normal University, Fuzhou 350007, China
- Key Laboratory of Humid Sub-tropical Eco-geographical Process of Ministry of Education, Fujian Normal University, Fuzhou 350007, China
| | - Jing-Qi Chen
- School of Geographical Science, Fujian Normal University, Fuzhou 350007, China
- Key Laboratory of Humid Sub-tropical Eco-geographical Process of Ministry of Education, Fujian Normal University, Fuzhou 350007, China
| | - Wen-Wei Chen
- Daiyun Mountain National Nature Reserve Administration Bureau, Quanzhou 362500, Fujian, China
| | - Yueh-Min Chen
- School of Geographical Science, Fujian Normal University, Fuzhou 350007, China
- Key Laboratory of Humid Sub-tropical Eco-geographical Process of Ministry of Education, Fujian Normal University, Fuzhou 350007, China
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Deng ML, Feng MM, Liu XF, Chen SD, He JZ, Lin YX. [Simulated nitrogen deposition reduces potential nitrous oxide emissions in a natural Castanopsis carlesii forest soil]. Ying Yong Sheng Tai Xue Bao 2022; 33:2705-2710. [PMID: 36384605 DOI: 10.13287/j.1001-9332.202210.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
The reactive nitrogen deposition in subtropical region of China has been increasing annually, which affects biogeochemical processes in forest soils. In this study, three treatments were established, including control (no N addition, CK), low nitrogen deposition (40 kg·hm-2·a-1, LN), and high nitrogen deposition (80 kg·hm-2·a-1, HN) to study the response of denitrifying functional genes and potential N2O emissions to simulated nitrogen deposition in the soils of a natural Castanopsis carlesii forest. Results showed that HN significantly decreased soil potential N2O emission, while 8-year nitrogen deposition did not affect the abundances of nirS, nirK, nosZ Ⅰ and nosZ Ⅱ. However, the abundance of nosZ Ⅰwas significantly higher than nosZ Ⅱ in all the treatments, indicating that nosZ Ⅰ dominated over nosZ Ⅱ in the acidic soils. HN significantly decreased the ratio of (nirK+nirS)/(nosZ Ⅰ+nosZ Ⅱ), which was positively correlated with soil pH. The results suggested that long-term high nitrogen deposition reduced soil pH and the abundance ratio of (nirK+nirS)/(nosZ Ⅰ+nosZ Ⅱ), which subsequently reduced the potential N2O emission.
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Affiliation(s)
- Mi-Lin Deng
- Cultivation Base of State Key Laboratory for Subtropical Mountain Ecology, Fuzhou 350007, China
- School of Geographical Sciences, Fujian Normal University, Fuzhou 350007, China
| | - Meng-Meng Feng
- Cultivation Base of State Key Laboratory for Subtropical Mountain Ecology, Fuzhou 350007, China
- School of Geographical Sciences, Fujian Normal University, Fuzhou 350007, China
| | - Xiao-Fei Liu
- School of Geographical Sciences, Fujian Normal University, Fuzhou 350007, China
- Fujian Sanming Forest Ecosystem and Global Change National Observation and Research Station, Sanming 365000, Fujian, China
| | - Shi-Dong Chen
- School of Geographical Sciences, Fujian Normal University, Fuzhou 350007, China
- Fujian Sanming Forest Ecosystem and Global Change National Observation and Research Station, Sanming 365000, Fujian, China
| | - Ji-Zheng He
- Cultivation Base of State Key Laboratory for Subtropical Mountain Ecology, Fuzhou 350007, China
- School of Geographical Sciences, Fujian Normal University, Fuzhou 350007, China
| | - Yong-Xin Lin
- Cultivation Base of State Key Laboratory for Subtropical Mountain Ecology, Fuzhou 350007, China
- School of Geographical Sciences, Fujian Normal University, Fuzhou 350007, China
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Zeng QX, Yuan XC, Zhou JC, Wu JM, Li WZ, Lin HY, Zhang XQ, Chen YM. [Effects of nitrogen addition on the kinetic parameters of soil acid phosphomonoesterase in a Moso bamboo forest]. Ying Yong Sheng Tai Xue Bao 2022; 33:2178-2186. [PMID: 36043825 DOI: 10.13287/j.1001-9332.202208.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Soil phosphatases are important in the mineralization of organophosphates and in the phosphorus (P) cycle. The kinetic mechanisms of phosphatases in response to nitrogen (N) deposition remain unclear. We carried out a field experiment with four different concentrations of N: 0 g N·hm-2·a-1(control), 20 g N·hm-2·a-1(low N), 40 g N·hm-2·a-1(medium N), and 80 g N·hm-2·a-1(high N) in a subtropical Moso bamboo forest. Soil samples were then collected from 0 to 15 cm depth, after 3, 5 and 7 years of N addition. We analyzed soil chemical properties and microbial biomass. Acid phosphatase (ACP) was investigated on the basis of maximum reaction velocity (Vm), Michaelis constant (Km), and catalytic efficiency (Ka). Results showed that N addition significantly decreased soil dissolved organic carbon (DOC), available phosphorus, and organophosphate content, but significantly increased soil ammonium, nitrate-N content, and Vm. There was a significant relationship between Vm and the concentrations of available phosphorus, organophosphate, and soil DOC. In general, N addition substantially increased Ka, but did not affect Km. The Km value in the high N treatment group was higher than that in the control group after five years of N addition. Km was significantly negatively associated with both available phosphorus and organophosphate. Medium and high N treatments had stronger effects on the kinetic parameters of ACP than low N treatment. Results of variation partition analysis showed that changes in soil chemical properties, rather than microbial biomass, dominated changes in Vm(47%) and Km(33%). In summary, N addition significantly affected substrate availability in Moso bamboo forest soil and modulated soil P cycle by regulating ACP kinetic parameters (especially Vm). The study would improve the understanding of the mechanisms underlying soil microorganisms-regulated soil P cycle under N enrichment. These mechanisms would identify the important parameters for improving soil P cycling models under global change scenarios.
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Affiliation(s)
- Quan-Xin Zeng
- School of Geographical Science, Fujian Normal University, Fuzhou 350007, China
- Cultivation Base of State Key Laboratory of Humid Subtropical Mountain Ecology, Fujian Normal University, Fuzhou 350007, China
| | - Xiao-Chun Yuan
- School of Geographical Science, Fujian Normal University, Fuzhou 350007, China
- Cultivation Base of State Key Laboratory of Humid Subtropical Mountain Ecology, Fujian Normal University, Fuzhou 350007, China
- College of Tourism, Wuyi University, Wuyishan 354300, Fujian, China
| | - Jia-Cong Zhou
- School of Geographical Science, Fujian Normal University, Fuzhou 350007, China
- Cultivation Base of State Key Laboratory of Humid Subtropical Mountain Ecology, Fujian Normal University, Fuzhou 350007, China
| | - Jun-Mei Wu
- School of Geographical Science, Fujian Normal University, Fuzhou 350007, China
- Cultivation Base of State Key Laboratory of Humid Subtropical Mountain Ecology, Fujian Normal University, Fuzhou 350007, China
| | - Wen-Zhou Li
- Daiyun Mountain National Nature Reserve Administration Bureau, Quanzhou 362500, Fujian, China
| | - Hui-Ying Lin
- School of Geographical Science, Fujian Normal University, Fuzhou 350007, China
- Cultivation Base of State Key Laboratory of Humid Subtropical Mountain Ecology, Fujian Normal University, Fuzhou 350007, China
| | - Xiao-Qing Zhang
- School of Geographical Science, Fujian Normal University, Fuzhou 350007, China
- Cultivation Base of State Key Laboratory of Humid Subtropical Mountain Ecology, Fujian Normal University, Fuzhou 350007, China
| | - Yueh-Min Chen
- School of Geographical Science, Fujian Normal University, Fuzhou 350007, China
- Cultivation Base of State Key Laboratory of Humid Subtropical Mountain Ecology, Fujian Normal University, Fuzhou 350007, China
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Peng Y, Peñuelas J, Vesterdal L, Yue K, Peguero G, Fornara DA, Heděnec P, Steffens C, Wu F. Responses of soil fauna communities to the individual and combined effects of multiple global change factors. Ecol Lett 2022; 25:1961-1973. [PMID: 35875902 DOI: 10.1111/ele.14068] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2022] [Revised: 05/11/2022] [Accepted: 06/20/2022] [Indexed: 11/28/2022]
Abstract
Soil fauna plays a key role in regulating biogeochemical cycles, but how multiple global change factors (GCFs) may affect faunal communities remains poorly studied. We conducted a meta-analysis using 1154 observations to evaluate the individual and combined effects of elevated CO2 , nitrogen (N) addition, warming, increased rainfall and drought on soil fauna density and diversity. Here we show that, overall, individual and combined effects of GCFs had negligible effects on soil fauna density and diversity, except that density was negatively affected by drought (-27.4%) and positively affected by increased rainfall individually (+24.9%) and in combination with N addition (+67.3%) or warming (+70.4%). GCF effects varied among taxonomic groups both in magnitude and direction. Variables such as latitude, elevation and experimental setting significantly impacted both individual and combined effects. Our results suggest that soil fauna density is affected by changed rainfall regimes, while diversity is resistant against individual and combined effects of multiple GCFs.
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Affiliation(s)
- Yan Peng
- Key Laboratory for Humid Subtropical Eco-Geographical Processes of the Ministry of Education, School of Geographical Sciences, Fujian Normal University, Fuzhou, China
| | - Josep Peñuelas
- CREAF, E08193, Cerdanyola del Vallès, Catalonia, Spain.,CSIC, Global Ecology Unit, CREAF-CSIC-UAB, E08193, Cerdanyola del Vallès, Catalonia, Spain
| | - Lars Vesterdal
- Department of Geosciences and Natural Resource Management, University of Copenhagen, Frederiksberg C, Denmark
| | - Kai Yue
- Key Laboratory for Humid Subtropical Eco-Geographical Processes of the Ministry of Education, School of Geographical Sciences, Fujian Normal University, Fuzhou, China
| | - Guille Peguero
- CREAF, E08193, Cerdanyola del Vallès, Catalonia, Spain.,CSIC, Global Ecology Unit, CREAF-CSIC-UAB, E08193, Cerdanyola del Vallès, Catalonia, Spain
| | - Dario A Fornara
- Davines Group, Rodale Institute European Regenerative Organic Center (EROC), Parma, Italy
| | - Petr Heděnec
- Institute of Tropical Biodiversity and Sustainable Development, University Malaysia Terengganu, Kuala Nerus, Terengganu, Malaysia
| | - Christina Steffens
- Institute of Soil Science, Center for Earth System Research and Sustainability (CEN), University of Hamburg, Hamburg, Germany
| | - Fuzhong Wu
- Key Laboratory for Humid Subtropical Eco-Geographical Processes of the Ministry of Education, School of Geographical Sciences, Fujian Normal University, Fuzhou, China
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45
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Li C, Li X, Shi Y, Yang Y, Li H. Effects of Nitrogen Addition on Soil Carbon-Fixing Microbial Diversity on Different Slopes in a Degraded Alpine Meadow. Front Plant Sci 2022; 13:921278. [PMID: 35812957 PMCID: PMC9263980 DOI: 10.3389/fpls.2022.921278] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/15/2022] [Accepted: 05/30/2022] [Indexed: 06/15/2023]
Abstract
Autotrophic carbon-fixing bacteria are a major driver of carbon sequestration and elemental cycling in grassland ecosystems. The characteristics of the response of carbon-fixing bacterial communities to nitrogen (N) addition in degraded alpine meadows are unclear. In this study, it was investigated that the effects of N addition in three levels [they are low (LN), middle (MN), and high (HN) with N supplement of 2, 5, and 10 g N⋅m-2⋅a-1, respectively] on soil carbon-fixing bacteria on different slopes in a degraded alpine meadow in the Yellow River on the Qinghai-Tibet Plateau. The results showed that there were significant differences in the abundance of some low abundance genera of carbon-fixing bacteria on the same slope (P < 0.05), but the differences in the abundance of various phyla and dominant genera were not significant. MN on gentle slopes significantly reduced the Chao1 index and observed species (P < 0.05), whereas N addition on steep slopes had no significant effect on the diversity. The abundance of the Cyanobacteria phylum and 28 genera of identified carbon-fixing bacteria differed significantly between slopes (P < 0.05), and observed species of carbon-fixing bacteria were significantly higher on steep slopes than on gentle slopes (P < 0.05). Factors affecting the carbon-fixing bacteria community structure include slope, N addition, ammoniacal nitrogen (N-NH4 +), microbial biomass carbon (MBC), soil water content (SWC), pH, soil C:N ratio, and microbial C:N ratio. Slope, N addition, soil physicochemical properties, microbial biomass, and stoichiometric ratio did not significantly affect the carbon-fixing bacteria diversity. Thus, the effect of exogenous N addition on carbon-fixing bacteria in degraded alpine meadows was dependent on slope conditions, and the response of carbon-fixing bacteria abundance and species number to N addition on gently slope sites was threshold-limited.
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Affiliation(s)
- Chengyi Li
- College of Agriculture and Animal Husbandry, Qinghai University, Xining, China
| | - Xilai Li
- College of Agriculture and Animal Husbandry, Qinghai University, Xining, China
- State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining, China
| | - Yan Shi
- School of Environment, The University of Auckland, Auckland, New Zealand
| | - Yuanwu Yang
- College of Agriculture and Animal Husbandry, Qinghai University, Xining, China
- State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining, China
| | - Honglin Li
- State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining, China
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Qin S, Yang G, Zhang Y, Song M, Sun L, Cui Y, Dong J, Wang N, Liu X, Zheng P, Wang R. Mowing Did Not Alleviate the Negative Effect of Nitrogen Addition on the Arbuscular Mycorrhizal Fungal Community in a Temperate Meadow Grassland. Front Plant Sci 2022; 13:917645. [PMID: 35755642 PMCID: PMC9228033 DOI: 10.3389/fpls.2022.917645] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/11/2022] [Accepted: 05/23/2022] [Indexed: 06/15/2023]
Abstract
As nitrogen deposition intensifies under global climate change, understanding the responses of arbuscular mycorrhizal (AM) fungi to nitrogen deposition and the associated mechanisms are critical for terrestrial ecosystems. In this study, the effects of nitrogen addition and mowing on AM fungal communities in soil and mixed roots were investigated in an Inner Mongolia grassland. The results showed that nitrogen addition reduced the α-diversity of AM fungi in soil rather than that of root. Besides, nitrogen addition altered the composition of AM fungal community in soil. Soil pH and inorganic nitrogen content were the main causes of changes in AM fungal communities affected by nitrogen addition. Mowing and the interaction of nitrogen addition and mowing had no significant effect on AM fungal community diversity. In contrast, while mowing may reduce the negative effects of nitrogen addition on the richness and diversity of plants by alleviating light limitation, it could not do so with the negative effects on AM fungal communities. Furthermore, AM fungal communities clustered phylogenetically in all treatments in both soil and roots, indicating that environmental filtering was the main driving force for AM fungal community assembly. Our results highlight the different responses of AM fungi in the soil and roots of a grassland ecosystem to nitrogen addition and mowing. The study will improve our understanding of the effects of nitrogen deposition on the function of ecosystem.
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Affiliation(s)
- Siqi Qin
- School of Life Sciences, Institute of Ecology and Biodiversity, Shandong University, Jinan, China
- Shandong Provincial Engineering and Technology Research Center for Vegetation Ecology, Shandong University, Jinan, China
- Qingdao Forest Ecology Research Station of National Forestry and Grassland Administration, Shandong University, Jinan, China
| | - Guojiao Yang
- School of Life Sciences, Institute of Ecology and Biodiversity, Shandong University, Jinan, China
- College of Ecology and Environment, Hainan University, Haikou, China
| | - Yang Zhang
- School of Life Sciences, Institute of Ecology and Biodiversity, Shandong University, Jinan, China
- Shandong Provincial Engineering and Technology Research Center for Vegetation Ecology, Shandong University, Jinan, China
- Qingdao Forest Ecology Research Station of National Forestry and Grassland Administration, Shandong University, Jinan, China
| | - Meixia Song
- School of Life Sciences, Institute of Ecology and Biodiversity, Shandong University, Jinan, China
- Shandong Provincial Engineering and Technology Research Center for Vegetation Ecology, Shandong University, Jinan, China
- Qingdao Forest Ecology Research Station of National Forestry and Grassland Administration, Shandong University, Jinan, China
| | - Lu Sun
- School of Life Sciences, Institute of Ecology and Biodiversity, Shandong University, Jinan, China
- Shandong Provincial Engineering and Technology Research Center for Vegetation Ecology, Shandong University, Jinan, China
- Qingdao Forest Ecology Research Station of National Forestry and Grassland Administration, Shandong University, Jinan, China
| | - Yangzhe Cui
- School of Life Sciences, Institute of Ecology and Biodiversity, Shandong University, Jinan, China
- Shandong Provincial Engineering and Technology Research Center for Vegetation Ecology, Shandong University, Jinan, China
- Qingdao Forest Ecology Research Station of National Forestry and Grassland Administration, Shandong University, Jinan, China
| | - Jibin Dong
- School of Life Sciences, Institute of Ecology and Biodiversity, Shandong University, Jinan, China
- Shandong Provincial Engineering and Technology Research Center for Vegetation Ecology, Shandong University, Jinan, China
- Qingdao Forest Ecology Research Station of National Forestry and Grassland Administration, Shandong University, Jinan, China
| | - Ning Wang
- School of Life Sciences, Institute of Ecology and Biodiversity, Shandong University, Jinan, China
- Shandong Provincial Engineering and Technology Research Center for Vegetation Ecology, Shandong University, Jinan, China
- Qingdao Forest Ecology Research Station of National Forestry and Grassland Administration, Shandong University, Jinan, China
| | - Xiao Liu
- School of Life Sciences, Institute of Ecology and Biodiversity, Shandong University, Jinan, China
- Shandong Provincial Engineering and Technology Research Center for Vegetation Ecology, Shandong University, Jinan, China
- Qingdao Forest Ecology Research Station of National Forestry and Grassland Administration, Shandong University, Jinan, China
| | - Peiming Zheng
- School of Life Sciences, Institute of Ecology and Biodiversity, Shandong University, Jinan, China
- Shandong Provincial Engineering and Technology Research Center for Vegetation Ecology, Shandong University, Jinan, China
- Qingdao Forest Ecology Research Station of National Forestry and Grassland Administration, Shandong University, Jinan, China
| | - Renqing Wang
- School of Life Sciences, Institute of Ecology and Biodiversity, Shandong University, Jinan, China
- Shandong Provincial Engineering and Technology Research Center for Vegetation Ecology, Shandong University, Jinan, China
- Qingdao Forest Ecology Research Station of National Forestry and Grassland Administration, Shandong University, Jinan, China
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Feng MM, Lin YX, He ZY, Liu XF, Chen SD, Wan S, Duan CJ, Ye GP, He JZ. [Responses of soil ammonia-oxidizing microorganisms to simulated nitrogen deposition in a natural Castanopsis carlesii forest]. Ying Yong Sheng Tai Xue Bao 2022; 33:1622-1628. [PMID: 35729141 DOI: 10.13287/j.1001-9332.202206.032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Subtropical region of China is one of the global hotspots receiving nitrogen deposition. Nitrogen deposition could affect the abundance and community structure of ammonia oxidizers including ammonia-oxidizing bacteria (AOB), ammonia-oxidizing archaea (AOA) and complete ammonia oxidizer (comammox Nitrospira), with consequences on soil nutrient cycling that are driven by microorganisms. There is limited understanding for the newly discovered comammox Nitrospira in the subtropical forest soils. Here, we investigated the effect of simulated N deposition on abundances of soil ammonia oxidizers in the Castanopsis fargesii Nature Reserve in Xinkou Town, Sanming City, Fujian Province, China. Soil samples were collected from the field plots which received long-term nitrogen deposition with different dosages, including: CK, no additional treatment; LN, low nitrogen deposition treatment, dosage of 40 kg N·hm-2·a-1; and HN, high nitrogen deposition treatment, dosage of 80 kg N·hm-2·a-1. After 8-year treatment, simulated N deposition decreased soil pH and organic matter content, and increased nitrate content. We failed to amplify the amoA gene of AOB in the tested soils. High nitrogen deposition increased the abundance of AOA, but did not affect the abundance of comammox Nitrospira clade A and clade B. The ratio of comammox Nitrospira to AOA decreased with N addition, indicating that N addition weakened the role of comammox Nitrospira in nitrification in the subtropical forest soils. However, there were strong non-specific amplifications for both comammox Nitrospira clades A and B, highlighting the demand for the development of high coverage and specificity primers for comammox Nitrospira investigations in the future. The abundance of comammox Nitrospira clade A was positively correlated with total nitrogen (TN) and NH4+ concentration, while that of clade B was positively associated with soil organic carbon (SOC), TN and NH4+ Concentration. Overall, our findings demonstrated that simulated N deposition increased the relative importance of AOA in nitrification in the natural Castanopsis carlesii forest soil. These findings could provide theoretical support in coping with global change and N deposition in these regions.
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Affiliation(s)
- Meng-Meng Feng
- Cultivation Base of State Key Laboratory for Subtropical Mountain Ecology, Fuzhou 350007, China
- School of Geographical Sciences, Fujian Normal University, Fuzhou 350007, China
| | - Yong-Xin Lin
- Cultivation Base of State Key Laboratory for Subtropical Mountain Ecology, Fuzhou 350007, China
- School of Geographical Sciences, Fujian Normal University, Fuzhou 350007, China
| | - Zi-Yang He
- Cultivation Base of State Key Laboratory for Subtropical Mountain Ecology, Fuzhou 350007, China
- School of Geographical Sciences, Fujian Normal University, Fuzhou 350007, China
| | - Xiao-Fei Liu
- School of Geographical Sciences, Fujian Normal University, Fuzhou 350007, China
- Fujian Sanming Forest Ecosystem and Global Change National Observation and Research Station, Sanming 365000, Fujian, China
| | - Shi-Dong Chen
- School of Geographical Sciences, Fujian Normal University, Fuzhou 350007, China
- Fujian Sanming Forest Ecosystem and Global Change National Observation and Research Station, Sanming 365000, Fujian, China
| | - Song Wan
- Cultivation Base of State Key Laboratory for Subtropical Mountain Ecology, Fuzhou 350007, China
- School of Geographical Sciences, Fujian Normal University, Fuzhou 350007, China
| | - Chun-Jian Duan
- Cultivation Base of State Key Laboratory for Subtropical Mountain Ecology, Fuzhou 350007, China
- School of Geographical Sciences, Fujian Normal University, Fuzhou 350007, China
| | - Gui-Ping Ye
- Institute of Oceanography, Minjiang University, Fuzhou 350108, China
| | - Ji-Zheng He
- Cultivation Base of State Key Laboratory for Subtropical Mountain Ecology, Fuzhou 350007, China
- School of Geographical Sciences, Fujian Normal University, Fuzhou 350007, China
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48
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Zhu C, Luo H, Luo L, Wang K, Liao Y, Zhang S, Huang S, Guo X, Zhang L. Nitrogen and Biochar Addition Affected Plant Traits and Nitrous Oxide Emission From Cinnamomum camphora. Front Plant Sci 2022; 13:905537. [PMID: 35620695 PMCID: PMC9127667 DOI: 10.3389/fpls.2022.905537] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/27/2022] [Accepted: 04/14/2022] [Indexed: 06/15/2023]
Abstract
Atmospheric nitrous oxide (N2O) increase contributes substantially to global climate change due to its large global warming potential. Soil N2O emissions have been widely studied, but plants have so far been ignored, even though they are known as an important source of N2O. The specific objectives of this study are to (1) reveal the effects of nitrogen and biochar addition on plant functional traits and N2O emission of Cinnamomum camphora seedlings; (2) find out the possible leaf traits affecting plant N2O emissions. The effects of nitrogen and biochar on plant functional traits and N2O emissions from plants using C. camphora seedlings were investigated. Plant N2O emissions, growth, each organ biomass, each organ nutrient allocation, gas exchange parameters, and chlorophyll fluorescence parameters of C. camphora seedlings were measured. Further investigation of the relationships between plant N2O emission and leaf traits was performed by simple linear regression analysis, principal component analysis (PCA), and structural equation model (SEM). It was found that nitrogen addition profoundly increased cumulative plant N2O emissions (+109.25%), which contributed substantially to the atmosphere's N2O budget in forest ecosystems. Plant N2O emissions had a strong correlation to leaf traits (leaf TN, P n , G s , C i , Tr, WUE L , α, ETR max, I k , Fv/Fm, Y(II), and SPAD). Structural equation modelling revealed that leaf TN, leaf TP, P n , C i , Tr, WUE L , α, ETR max, and I k were key traits regulating the effects of plants on N2O emissions. These results provide a direction for understanding the mechanism of N2O emission from plants and provide a theoretical basis for formulating corresponding emission reduction schemes.
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Affiliation(s)
- Congfei Zhu
- Key Laboratory of Silviculture, Collaborative Innovation Center of Jiangxi Typical Trees Cultivation and Utilization, College of Forestry, Jiangxi Agricultural University, Nanchang, China
| | - Handong Luo
- Key Laboratory of Silviculture, Collaborative Innovation Center of Jiangxi Typical Trees Cultivation and Utilization, College of Forestry, Jiangxi Agricultural University, Nanchang, China
- Geological Environment Monitoring Station, Meizhou Natural Resources Bureau, Meizhou, China
| | - Laicong Luo
- Key Laboratory of Silviculture, Collaborative Innovation Center of Jiangxi Typical Trees Cultivation and Utilization, College of Forestry, Jiangxi Agricultural University, Nanchang, China
| | - Kunying Wang
- Key Laboratory of Silviculture, Collaborative Innovation Center of Jiangxi Typical Trees Cultivation and Utilization, College of Forestry, Jiangxi Agricultural University, Nanchang, China
| | - Yi Liao
- Key Laboratory of Silviculture, Collaborative Innovation Center of Jiangxi Typical Trees Cultivation and Utilization, College of Forestry, Jiangxi Agricultural University, Nanchang, China
| | - Shun Zhang
- Key Laboratory of Silviculture, Collaborative Innovation Center of Jiangxi Typical Trees Cultivation and Utilization, College of Forestry, Jiangxi Agricultural University, Nanchang, China
| | - Shenshen Huang
- Key Laboratory of Silviculture, Collaborative Innovation Center of Jiangxi Typical Trees Cultivation and Utilization, College of Forestry, Jiangxi Agricultural University, Nanchang, China
| | - Xiaomin Guo
- Key Laboratory of Silviculture, Collaborative Innovation Center of Jiangxi Typical Trees Cultivation and Utilization, College of Forestry, Jiangxi Agricultural University, Nanchang, China
| | - Ling Zhang
- Key Laboratory of Silviculture, Collaborative Innovation Center of Jiangxi Typical Trees Cultivation and Utilization, College of Forestry, Jiangxi Agricultural University, Nanchang, China
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Guo A, Zuo X, Hu Y, Yue P, Li X, Lv P, Zhao S. Two Dominant Herbaceous Species Have Different Plastic Responses to N Addition in a Desert Steppe. Front Plant Sci 2022; 13:801427. [PMID: 35557730 PMCID: PMC9087737 DOI: 10.3389/fpls.2022.801427] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/05/2021] [Accepted: 04/06/2022] [Indexed: 06/15/2023]
Abstract
Nitrogen (N) deposition rates are increasing in the temperate steppe due to human activities. Understanding the plastic responses of plant dominant species to increased N deposition through the lens of multiple traits is crucial for species selection in the process of vegetation restoration. Here, we measured leaf morphological, physiological, and anatomical traits of two dominant species (Stipa glareosa and Peganum harmala) after 3-year N addition (0, 1, 3, and 6 g N m-2 year-1, designated N0, N1, N3, and N6, respectively) in desert steppe of Inner Mongolia. We separately calculated the phenotypic plasticity index (PI) of each trait under different N treatments and the mean phenotypic plasticity index (MPI) of per species. The results showed that N addition increased the leaf N content (LNC) in both species. N6 increased the contents of soluble protein and proline, and decreased the superoxide dismutase (SOD) and the peroxidase (POD) activities of S. glareosa, while increased POD and catalase (CAT) activities of P. harmala. N6 increased the palisade tissue thickness (PT), leaf thickness (LT), and palisade-spongy tissue ratio (PT/ST) and decreased the spongy tissue-leaf thickness ratio (ST/LT) of S. glareosa. Furthermore, we found higher physiological plasticity but lower morphological and anatomical plasticity in both species, with greater anatomical plasticity and MPI in S. glareosa than P. harmala. Overall, multi-traits comparison reveals that two dominant desert-steppe species differ in their plastic responses to N addition. The higher plasticity of S. glareosa provides some insight into why S. glareosa has a broad distribution in a desert steppe.
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Affiliation(s)
- Aixia Guo
- Urat Desert-Grassland Research Station, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, China
- University of Chinese Academy of Sciences, Beijing, China
- Key Laboratory of Stress Physiology and Ecology in Cold and Arid Regions, Gansu Province, Lanzhou, China
| | - Xiaoan Zuo
- Urat Desert-Grassland Research Station, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, China
- Key Laboratory of Stress Physiology and Ecology in Cold and Arid Regions, Gansu Province, Lanzhou, China
- Naiman Desertification Research Station, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, China
| | - Ya Hu
- Urat Desert-Grassland Research Station, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, China
- University of Chinese Academy of Sciences, Beijing, China
- Key Laboratory of Stress Physiology and Ecology in Cold and Arid Regions, Gansu Province, Lanzhou, China
| | - Ping Yue
- Urat Desert-Grassland Research Station, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, China
- Key Laboratory of Stress Physiology and Ecology in Cold and Arid Regions, Gansu Province, Lanzhou, China
| | - Xiangyun Li
- Urat Desert-Grassland Research Station, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, China
- University of Chinese Academy of Sciences, Beijing, China
- Key Laboratory of Stress Physiology and Ecology in Cold and Arid Regions, Gansu Province, Lanzhou, China
| | - Peng Lv
- Urat Desert-Grassland Research Station, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, China
- University of Chinese Academy of Sciences, Beijing, China
- Key Laboratory of Stress Physiology and Ecology in Cold and Arid Regions, Gansu Province, Lanzhou, China
| | - Shenglong Zhao
- College of Resources and Environmental Engineering, Tianshui Normal University, Tianshui, China
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Xiao J, Dong S, Shen H, Li S, Wessell K, Liu S, Li W, Zhi Y, Mu Z, Li H. N Addition Overwhelmed the Effects of P Addition on the Soil C, N, and P Cycling Genes in Alpine Meadow of the Qinghai-Tibetan Plateau. Front Plant Sci 2022; 13:860590. [PMID: 35557731 PMCID: PMC9087854 DOI: 10.3389/fpls.2022.860590] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2022] [Accepted: 03/09/2022] [Indexed: 05/06/2023]
Abstract
Although human activities have greatly increased nitrogen (N) and phosphorus (P) inputs to the alpine grassland ecosystems, how soil microbial functional genes involved in nutrient cycling respond to N and P input remains unknown. Based on a fertilization experiment established in an alpine meadow of the Qinghai-Tibetan Plateau, we investigated the response of the abundance of soil carbon (C), N, and P cycling genes to N and P addition and evaluated soil and plant factors related to the observed effects. Our results indicated that the abundance of C, N, and P cycling genes were hardly affected by N addition, while P addition significantly increased most of them, suggesting that the availability of P plays a more important role for soil microorganisms than N in this alpine meadow ecosystem. Meanwhile, when N and P were added together, the abundance of C, N, and P cycling genes did not change significantly, indicating that the promoting effects of P addition on microbial functional genes abundances were overwhelmed by N addition. The Mantel analysis and the variation partitioning analysis revealed the major role of shoot P concentration in regulating the abundance of C, N, and P cycling genes. These results suggest that soil P availability and plant traits are key in governing C, N, and P cycling genes at the functional gene level in the alpine grassland ecosystem.
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Affiliation(s)
- Jiannan Xiao
- School of Environment, Beijing Normal University, Beijing, China
| | - Shikui Dong
- School of Grassland Sciences, Beijing Forestry University, Beijing, China
| | - Hao Shen
- School of Grassland Sciences, Beijing Forestry University, Beijing, China
| | - Shuai Li
- College of Resource and Environment, Shanxi Agricultural University, Taigu, China
| | - Kelly Wessell
- Tompkin Cortland Community College, Ithaca, NY, United States
| | - Shiliang Liu
- School of Environment, Beijing Normal University, Beijing, China
| | - Wei Li
- School of Environment, Beijing Normal University, Beijing, China
| | - Yangliu Zhi
- School of Environment, Beijing Normal University, Beijing, China
| | - Zhiyuan Mu
- School of Environment, Beijing Normal University, Beijing, China
| | - Hongbo Li
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing, China
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