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Hu J, Bettembourg M, Moreno S, Zhang A, Schnürer A, Sun C, Sundström J, Jin Y. Characterisation of a low methane emission rice cultivar suitable for cultivation in high latitude light and temperature conditions. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:92950-92962. [PMID: 37501024 PMCID: PMC10447601 DOI: 10.1007/s11356-023-28985-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2023] [Accepted: 07/21/2023] [Indexed: 07/29/2023]
Abstract
Rice cultivation on paddy soil is commonly associated with emissions of methane, a greenhouse gas, but rice varieties may differ in their actual level of emissions. This study analysed methane emissions associated with 22 distinct rice genotypes, using gas chromatography, and identified the cultivar Heijing 5 from northern China as a potential low-methane rice variety. To confirm this and to examine whether Heijing 5 can perform similarly at higher latitudes, Heijing 5 was cultivated in field trials in China (lat. 32° N) and Sweden (lat. 59° N) where (i) methane emissions were measured, (ii) methanogen abundance in the rhizosphere was determined using quantitative PCR, and (iii) the concentrations of nutrients in water and of heavy metals in rice grain and paddy soil were analysed. The results demonstrated that the low-methane rice cultivar Heijing 5 can successfully complete an entire growth period at high-latitude locations such as central Sweden. Massively parallel sequencing of mRNAs identified candidate genes involved in day length and cold acclimatisation. Cultivation of Heijing 5 in central Sweden was also associated with relatively low heavy metal accumulation in rice grains and lowered nutrient losses to neighbouring water bodies.
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Affiliation(s)
- Jia Hu
- Department of Plant Biology, Sweden University of Agricultural Science, The Linnean Centre for Plant Biology, Box 7080, SE-75007, Uppsala, Sweden
| | - Mathilde Bettembourg
- Department of Plant Biology, Sweden University of Agricultural Science, The Linnean Centre for Plant Biology, Box 7080, SE-75007, Uppsala, Sweden
| | - Silvana Moreno
- Department of Plant Biology, Sweden University of Agricultural Science, The Linnean Centre for Plant Biology, Box 7080, SE-75007, Uppsala, Sweden
| | - Ai Zhang
- Department of Plant Biology, Sweden University of Agricultural Science, The Linnean Centre for Plant Biology, Box 7080, SE-75007, Uppsala, Sweden
| | - Anna Schnürer
- Department of Molecular Sciences, Swedish University of Agricultural Sciences, Box 7015, SE-750 07, Uppsala, Sweden
| | - Chuanxin Sun
- Department of Plant Biology, Sweden University of Agricultural Science, The Linnean Centre for Plant Biology, Box 7080, SE-75007, Uppsala, Sweden
| | - Jens Sundström
- Department of Plant Biology, Sweden University of Agricultural Science, The Linnean Centre for Plant Biology, Box 7080, SE-75007, Uppsala, Sweden
| | - Yunkai Jin
- Department of Plant Biology, Sweden University of Agricultural Science, The Linnean Centre for Plant Biology, Box 7080, SE-75007, Uppsala, Sweden.
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2
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Wang H, Jurasinski G, Täumer J, Kuß AW, Groß V, Köhn D, Günther A, Urich T. Linking Transcriptional Dynamics of Peat Microbiomes to Methane Fluxes during a Summer Drought in Two Rewetted Fens. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2023; 57:5089-5101. [PMID: 36926875 DOI: 10.1021/acs.est.2c07461] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Rewetted peatlands are reestablished hot spots for CH4 emissions, which are subject to increased drought events in the course of climate change. However, the dynamics of soil methane-cycling microbiomes in rewetted peatlands during summer drought are still poorly characterized. Using a quantitative metatranscriptomic approach, we investigated the changes in the transcript abundances of methanogen and methanotroph rRNA, as well as mcrA and pmoA mRNA before, during, and after the 2018 summer drought in a coastal and a percolation fen in northern Germany. Drought changed the community structure of methane-cycling microbiomes and decreased the CH4 fluxes as well as the rRNA and mRNA transcript abundances of methanogens and methanotrophs, but they showed no recovery or increase after the drought ended. The rRNA transcript abundance of methanogens was not correlated with CH4 fluxes in both fens. In the percolation fen, however, the mcrA transcript abundance showed a positive and significant correlation with CH4 fluxes. Importantly, when integrating pmoA abundance, a stronger correlation was observed between CH4 fluxes and mcrA/pmoA, suggesting that relationships between methanogens and methanotrophs are the key determinant of CH4 turnover. Our study provides a comprehensive understanding of the methane-cycling microbiome feedbacks to drought events in rewetted peatlands.
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Affiliation(s)
- Haitao Wang
- Institute of Microbiology, University of Greifswald, 17489 Greifswald, Germany
| | - Gerald Jurasinski
- Landscape Ecology, University of Rostock, 18059 Rostock, Germany
- Interdisciplinary Faculty, University of Rostock, 18059 Rostock, Germany
- Peatland Science, University of Greifswald, 17489 Greifswald, Germany
| | - Jana Täumer
- Institute of Microbiology, University of Greifswald, 17489 Greifswald, Germany
| | - Andreas W Kuß
- Human Molecular Genetics Group, Department of Functional Genomics, University Medicine Greifswald, 17489 Greifswald, Germany
| | - Verena Groß
- Institute of Microbiology, University of Greifswald, 17489 Greifswald, Germany
| | - Daniel Köhn
- Landscape Ecology, University of Rostock, 18059 Rostock, Germany
| | - Anke Günther
- Landscape Ecology, University of Rostock, 18059 Rostock, Germany
| | - Tim Urich
- Institute of Microbiology, University of Greifswald, 17489 Greifswald, Germany
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3
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Li Q, Peng C, Zhang J, Li Y, Song X. Nitrogen addition decreases methane uptake caused by methanotroph and methanogen imbalances in a Moso bamboo forest. Sci Rep 2021; 11:5578. [PMID: 33692387 PMCID: PMC7947007 DOI: 10.1038/s41598-021-84422-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2020] [Accepted: 02/11/2021] [Indexed: 11/23/2022] Open
Abstract
Forest soils play an important role in controlling global warming by reducing atmospheric methane (CH4) concentrations. However, little attention has been paid to how nitrogen (N) deposition may alter microorganism communities that are related to the CH4 cycle or CH4 oxidation in subtropical forest soils. We investigated the effects of N addition (0, 30, 60, or 90 kg N ha−1 yr−1) on soil CH4 flux and methanotroph and methanogen abundance, diversity, and community structure in a Moso bamboo (Phyllostachys edulis) forest in subtropical China. N addition significantly increased methanogen abundance but reduced both methanotroph and methanogen diversity. Methanotroph and methanogen community structures under the N deposition treatments were significantly different from those of the control. In N deposition treatments, the relative abundance of Methanoculleus was significantly lower than that in the control. Soil pH was the key factor regulating the changes in methanotroph and methanogen diversity and community structure. The CH4 emission rate increased with N addition and was negatively correlated with both methanotroph and methanogen diversity but positively correlated with methanogen abundance. Overall, our results suggested that N deposition can suppress CH4 uptake by altering methanotroph and methanogen abundance, diversity, and community structure in subtropical Moso bamboo forest soils.
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Affiliation(s)
- Quan Li
- Center for Ecological Forecasting and Global Change, College of Forestry, Northwest A&F University, Yangling, 712100, China.,State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Hangzhou, 311300, China
| | - Changhui Peng
- Center for Ecological Forecasting and Global Change, College of Forestry, Northwest A&F University, Yangling, 712100, China. .,Department of Biology Sciences, Institute of Environment Sciences, University of Quebec at Montreal, Case Postale 8888, Succursale Centre-Ville, Montreal, H3C3P8, Canada.
| | - Junbo Zhang
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Hangzhou, 311300, China
| | - Yongfu Li
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Hangzhou, 311300, China
| | - Xinzhang Song
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Hangzhou, 311300, China.
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4
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Biogeochemical Processes of C and N in the Soil of Mangrove Forest Ecosystems. FORESTS 2020. [DOI: 10.3390/f11050492] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The mangrove forest provides various ecosystem services in tropical and subtropical regions. Many of these services are driven by the biogeochemical cycles of C and N, and soil is the major reservoir for these chemical elements. These cycles may be influenced by the changing climate. The high plant biomass in mangrove forests makes these forests an important sink for blue C storage. However, anaerobic soil conditions may also turn mangrove forests into an environmentally detrimental producer of greenhouse gases (such as CH4 and N2O), especially as air temperatures increase. In addition, the changing environmental factors associated with climate change may also influence the N cycles and change the patterns of N2 fixation, dissimilatory nitrate reduction to ammonium, and denitrification processes. This review summarizes the biogeochemical processes of C and N cycles in mangrove forest soils based on recently published studies, and how these processes may respond to climate change, with the aim of predicting the impacts of climate change on the mangrove forest ecosystem.
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5
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Wang PX, Yang YD, Wang XQ, Zhao J, Peixoto L, Zeng ZH, Zang HD. Manure amendment increased the abundance of methanogens and methanotrophs but suppressed the type I methanotrophs in rice paddies. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:8016-8027. [PMID: 31889290 DOI: 10.1007/s11356-019-07464-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/27/2019] [Accepted: 12/18/2019] [Indexed: 06/10/2023]
Abstract
Methane (CH4) emission is the consequence of CH4 production and consumption performed by methanogens and methanotrophs, respectively. Fertilization is an important factor that regulates the behavior of methanogens and methanotrophs; however, the effect of manure and rice straw addition combined with inorganic fertilizers on these communities is not well understood. This study aimed to explore how manure and rice straw amendments together with inorganic fertilizers influenced the methanogenic and methanotrophic communities in a 31-year fertilized rice paddy. Manure amendment significantly increased the abundance of mcrA and pmoA genes by 61.2% and 63.3% compared with the unfertilized control, whereas inorganic NPK fertilization alone or rice straw addition did not affect their abundances. Manure and rice straw amendments greatly decreased the Shannon index and ACE index of the methanogenic communities, whereas inorganic NPK fertilization alone increased the ACE index of the methanotrophic communities compared with the unfertilized control. Methanosarcinaceae and Methylococcaceae dominated at the family level, representing 23.1-35.0% and 48.7-67.2% of the total reads, for the methanogenic and methanotrophic communities, respectively. Application of manure together with inorganic fertilizers suppressed the Methanocellales methanogens and the type I methanotrophs (Methylococcus and Methylobacter). Fertilization greatly altered the community structure of methanogens and methanotrophs, and manure addition had more apparent effects than rice straw. Moreover, total nitrogen, soil organic carbon, available phosphorus, and available potassium correlated significantly to the abundance, composition, and community structure of methanogens and methanotrophs. In conclusion, our study revealed that long-term manure amendment in combination with inorganic fertilizers significantly increased the abundance of methanogens and methanotrophs, but suppressed the type I methanotrophs in rice paddies.
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Affiliation(s)
- Pei-Xin Wang
- College of Agronomy and Biotechnology, China Agricultural University, No. 2 Yuanmingyuan West Road, Haidian District, Beijing, 100193, China
- Key Laboratory of Farming System, Ministry of Agriculture and Rural Affairs, Beijing, 100193, China
| | - Ya-Dong Yang
- College of Agronomy and Biotechnology, China Agricultural University, No. 2 Yuanmingyuan West Road, Haidian District, Beijing, 100193, China
- Key Laboratory of Farming System, Ministry of Agriculture and Rural Affairs, Beijing, 100193, China
| | - Xi-Quan Wang
- College of Agronomy and Biotechnology, China Agricultural University, No. 2 Yuanmingyuan West Road, Haidian District, Beijing, 100193, China
- Key Laboratory of Farming System, Ministry of Agriculture and Rural Affairs, Beijing, 100193, China
| | - Jie Zhao
- College of Agronomy and Biotechnology, China Agricultural University, No. 2 Yuanmingyuan West Road, Haidian District, Beijing, 100193, China
- Key Laboratory of Farming System, Ministry of Agriculture and Rural Affairs, Beijing, 100193, China
| | - Leanne Peixoto
- Department of Agroecology, Aarhus University, Blichers Allé 20, 8830, Tjele, DK, Denmark
| | - Zhao-Hai Zeng
- College of Agronomy and Biotechnology, China Agricultural University, No. 2 Yuanmingyuan West Road, Haidian District, Beijing, 100193, China.
- Key Laboratory of Farming System, Ministry of Agriculture and Rural Affairs, Beijing, 100193, China.
| | - Hua-Dong Zang
- College of Agronomy and Biotechnology, China Agricultural University, No. 2 Yuanmingyuan West Road, Haidian District, Beijing, 100193, China
- Key Laboratory of Farming System, Ministry of Agriculture and Rural Affairs, Beijing, 100193, China
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6
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Ahmed M, Ahmad S, Waldrip HM, Ramin M, Raza MA. Whole Farm Modeling: A Systems Approach to Understanding and Managing Livestock for Greenhouse Gas Mitigation, Economic Viability and Environmental Quality. ANIMAL MANURE 2020. [DOI: 10.2134/asaspecpub67.c25] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Mukhtar Ahmed
- Department of Agricultural Research for Northern Sweden; Swedish University of Agricultural Sciences, Umeå-90183; Sweden
- Department of Agronomy; Pir Mehr Ali Shah Arid Agriculture University, Rawalpindi-46300; Pakistan
- Biological Systems Engineering; Washington State University; Pullman WA 99164-6120
| | - Shakeel Ahmad
- Department of Agronomy; Bahauddin Zakariya University, Multan-60800; Pakistan
- Department of Biological and Agricultural Engineering; The University of Georgia; Griffin GA 30223 USA
| | - Heidi M. Waldrip
- USDA-ARS Conservation and Production Research Laboratory PO Drawer 10; 300 Simmons Rd Bushland TX 79012
| | - Mohammad Ramin
- Department of Agricultural Research for Northern Sweden; Swedish University of Agricultural Sciences, Umeå-90183; Sweden
| | - Muhammad Ali Raza
- College of Agronomy, Sichuan Agricultural University; Chengdu 611130 PR China
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7
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Urbanization Altered Bacterial and Archaeal Composition in Tidal Freshwater Wetlands Near Washington DC, USA, and Buenos Aires, Argentina. Microorganisms 2019; 7:microorganisms7030072. [PMID: 30845660 PMCID: PMC6463075 DOI: 10.3390/microorganisms7030072] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2018] [Revised: 02/14/2019] [Accepted: 03/02/2019] [Indexed: 02/03/2023] Open
Abstract
Urban expansion causes coastal wetland loss, and environmental stressors associated with development can lead to wetland degradation and loss of ecosystem services. This study investigated the effect of urbanization on prokaryotic community composition in tidal freshwater wetlands. Sites in an urban, suburban, and rural setting were located near Buenos Aires, Argentina, and Washington D.C., USA. We sampled soil associated with two pairs of functionally similar plant species, and used Illumina sequencing of the 16S rRNA gene to examine changes in prokaryotic communities. Urban stressors included raw sewage inputs, nutrient pollution, and polycyclic aromatic hydrocarbons. Prokaryotic communities changed along the gradient (nested PerMANOVA, Buenos Aires: p = 0.005; Washington D.C.: p = 0.001), but did not differ between plant species within sites. Indicator taxa included Methanobacteria in rural sites, and nitrifying bacteria in urban sites, and we observed a decrease in methanogens and an increase in ammonia-oxidizers from rural to urban sites. Functional profiles in the Buenos Aires communities showed higher abundance of pathways related to nitrification and xenobiotic degradation in the urban site. These results suggest that changes in prokaryotic taxa across the gradient were due to surrounding stressors, and communities in urban and rural wetlands are likely carrying out different functions.
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8
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Zhang Y, Cui M, Duan J, Zhuang X, Zhuang G, Ma A. Abundance, rather than composition, of methane-cycling microbes mainly affects methane emissions from different vegetation soils in the Zoige alpine wetland. Microbiologyopen 2018; 8:e00699. [PMID: 30047238 PMCID: PMC6460274 DOI: 10.1002/mbo3.699] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2018] [Revised: 04/09/2018] [Accepted: 06/25/2018] [Indexed: 11/10/2022] Open
Abstract
Methane fluxes, which are controlled by methanogens and methanotrophs, vary among wetland vegetation species. In this study, we investigated belowground methanogens and methanotrophs in two soils under two different dominant vegetation species with different methane fluxes in the Zoige wetland, which was slightly but significantly (p ≤ 0.05) higher in soils covered by Carex muliensis than that in soils covered by Eleocharis valleculosa. Real‐time quantitative PCR and Illumina MiSeq sequencing methods were used to elucidate the microbial communities based on the key genes involved in methane production and oxidation. The absolute abundances of methanogens and methanotrophs of samples from C. muliensis were 1.80 ± 0.07 × 106 and 4.03 ± 0.28 × 106 copies g‐soil−1, respectively, and which from E. valleculosa were 3.99 ± 0.19 × 105 and 2.53 ± 0.22 × 106 copies g‐soil−1 , respectively. The t‐test result showed that both the abundance of methanogens and methanotrophs from C. muliensis were significantly higher (p ≤ 0.05) than that of samples from E. valleculosa. However, the diversities and compositions of both methanogens and methanotrophs showed no significant differences (p ≥ 0.05) between vegetation species. The path analysis showed that the microbial abundance had a greater effect than the microbial diversity on methane production potentials and the regression analysis also showed that the methane emissions significantly (p ≤ 0.05) varied with the abundance of methane‐cycling microbes. These findings imply that abundance rather than diversity and composition of a methane‐cycling microbial community is the major contributor to the variations in methane emissions between vegetation types in the Zoige wetland.
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Affiliation(s)
- Yanfen Zhang
- Key Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Mengmeng Cui
- University of Chinese Academy of Sciences, Beijing, China.,National Laboratory of Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing, China
| | - Jingbo Duan
- University of Chinese Academy of Sciences, Beijing, China.,Key Laboratory of Environmental Optics & Technology, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei, China
| | - Xuliang Zhuang
- Key Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Guoqiang Zhuang
- Key Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Anzhou Ma
- Key Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, China.,University of Chinese Academy of Sciences, Beijing, China
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9
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Shiau YJ, Cai Y, Lin YT, Jia Z, Chiu CY. Community Structure of Active Aerobic Methanotrophs in Red Mangrove (Kandelia obovata) Soils Under Different Frequency of Tides. MICROBIAL ECOLOGY 2018; 75:761-770. [PMID: 29022063 DOI: 10.1007/s00248-017-1080-1] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/11/2017] [Accepted: 09/22/2017] [Indexed: 06/07/2023]
Abstract
Methanotrophs are important microbial communities in coastal ecosystems. They reduce CH4 emission in situ, which is influenced by soil conditions. This study aimed to understand the differences in active aerobic methanotrophic communities in mangrove forest soils experiencing different inundation frequency, i.e., in soils from tidal mangroves, distributed at lower elevations, and from dwarf mangroves, distributed at higher elevations. Labeling of pmoA gene of active methanotrophs using DNA-based stable isotope probing (DNA-SIP) revealed that methanotrophic activity was higher in the dwarf mangrove soils than in the tidal mangrove soils, possibly because of the more aerobic soil conditions. Methanotrophs affiliated with the cluster deep-sea-5 belonging to type Ib methanotrophs were the most dominant methanotrophs in the fresh mangrove soils, whereas type II methanotrophs also appeared in the fresh dwarf mangrove soils. Furthermore, Methylobacter and Methylosarcina were the most important active methanotrophs in the dwarf mangrove soils, whereas Methylomonas and Methylosarcina were more active in the tidal mangrove soils. High-throughput sequencing of the 16S ribosomal RNA (rRNA) gene also confirmed similar differences in methanotrophic communities at the different locations. However, several unclassified methanotrophic bacteria were found by 16S rRNA MiSeq sequencing in both fresh and incubated mangrove soils, implying that methanotrophic communities in mangrove forests may significantly differ from the methanotrophic communities documented in previous studies. Overall, this study showed the feasibility of 13CH4 DNA-SIP to study the active methanotrophic communities in mangrove forest soils and revealed differences in the methanotrophic community structure between coastal mangrove forests experiencing different tide frequencies.
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Affiliation(s)
- Yo-Jin Shiau
- Biodiversity Research Center, Academia Sinica, No. 128, Academia Road Section II, Nangang, Taipei, 11529, Taiwan
| | - Yuanfeng Cai
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Science, No. 71 East Beijing Road, Nanjing, 210008, People's Republic of China
| | - Yu-Te Lin
- Biodiversity Research Center, Academia Sinica, No. 128, Academia Road Section II, Nangang, Taipei, 11529, Taiwan
| | - Zhongjun Jia
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Science, No. 71 East Beijing Road, Nanjing, 210008, People's Republic of China.
| | - Chih-Yu Chiu
- Biodiversity Research Center, Academia Sinica, No. 128, Academia Road Section II, Nangang, Taipei, 11529, Taiwan.
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10
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Wu X, Liu H, Zheng X, Lu F, Wang S, Li Z, Liu G, Fu B. Responses of CH 4 and N 2O fluxes to land-use conversion and fertilization in a typical red soil region of southern China. Sci Rep 2017; 7:10571. [PMID: 28874714 PMCID: PMC5585344 DOI: 10.1038/s41598-017-10806-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2017] [Accepted: 08/15/2017] [Indexed: 11/09/2022] Open
Abstract
Land-use conversion and fertilization have been widely reported as important management practices affecting CH4 and N2O fluxes; however, few long-term in situ measurements are available after land-use conversion from rice paddies to upland cultivation, especially those including the initial stages after conversion. A 3-year field experiment was conducted in rice paddies and a newly converted citrus orchard to measure CH4 and N2O fluxes in response to land-use conversion and fertilization in a red soil region of southern China. Annual CH4 and N2O emissions averaged 303.9 kg C ha-1 and 3.8 kg N ha-1, respectively, for the rice paddies over three cultivation years. Although annual N2O emissions increased two- to threefold after the conversion of rice paddies to citrus orchard, the substantial reduction in CH4 emissions and even shift into a sink for atmospheric CH4 led to significantly lower CO2-eq emissions of CH4 and N2O in the citrus orchard compared to the rice paddies. Moreover, distinct CH4 emissions were observed during the initial stages and sustained for several weeks after conversion. Our results indicated that the conversion of rice paddies to citrus orchards in this region for higher economic benefits may also lead to lower aggregate CH4 and N2O emissions.
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Affiliation(s)
- Xing Wu
- State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China. .,Joint Center for Global Change Studies, Beijing, 100875, China.
| | - Huifeng Liu
- State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China.,University of Chinese Academy of Science, Beijing, 100049, China
| | - Xunhua Zheng
- State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029, China
| | - Fei Lu
- State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China
| | - Shuai Wang
- State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China.,Joint Center for Global Change Studies, Beijing, 100875, China
| | - Zongshan Li
- State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China.,Joint Center for Global Change Studies, Beijing, 100875, China
| | - Guohua Liu
- State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China.,Joint Center for Global Change Studies, Beijing, 100875, China
| | - Bojie Fu
- State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China. .,Joint Center for Global Change Studies, Beijing, 100875, China.
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