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Zhang M, Shi C, Li X, Wang K, Qiu Z, Shi F. Changes in the structure and function of rhizosphere soil microbial communities induced by Amaranthus palmeri invasion. Front Microbiol 2023; 14:1114388. [PMID: 37056750 PMCID: PMC10089265 DOI: 10.3389/fmicb.2023.1114388] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2022] [Accepted: 03/09/2023] [Indexed: 03/30/2023] Open
Abstract
IntroductionPlant invasion can profoundly alter ecosystem processes driven by microorganisms. The fundamental mechanisms linking microbial communities, functional genes, and edaphic characteristics in invaded ecosystems are, nevertheless, poorly understood.MethodsHere, soil microbial communities and functions were determined across 22 Amaranthus palmeri (A. palmeri) invaded patches by pairwise 22 native patches located in the Jing-Jin-Ji region of China using high-throughput amplicon sequencing and quantitative microbial element cycling technologies.ResultsAs a result, the composition and structure of rhizosphere soil bacterial communities differed significantly between invasive and native plants according to principal coordinate analysis. A. palmeri soils exhibited higher abundance of Bacteroidetes and Nitrospirae, and lower abundance of Actinobacteria than native soils. Additionally, compared to native rhizosphere soils, A. palmeri harbored a much more complex functional gene network with higher edge numbers, average degree, and average clustering coefficient, as well as lower network distance and diameter. Furthermore, the five keystone taxa identified in A. palmeri rhizosphere soils belonged to the orders of Longimicrobiales, Kineosporiales, Armatimonadales, Rhizobiales and Myxococcales, whereas Sphingomonadales and Gemmatimonadales predominated in the native rhizosphere soils. Moreover, random forest model revealed that keystone taxa were more important indicators of soil functional attributes than edaphic variables in both A. palmeri and native rhizosphere soils. For edaphic variables, only ammonium nitrogen was a significant predictor of soil functional potentials in A. palmeri invaded ecosystems. We also found keystone taxa in A. palmeri rhizosphere soils had strong and positive correlations with functional genes compared to native soils.DiscussionOur study highlighted the importance of keystone taxa as a driver of soil functioning in invaded ecosystem.
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Affiliation(s)
- Mei Zhang
- Department of Plant Biology and Ecology, College of Life Sciences, Nankai University, Tianjin, China
| | - Cong Shi
- School of Environmental Science and Engineering, Tiangong University, Tianjin, China
| | - Xueying Li
- Department of Plant Biology and Ecology, College of Life Sciences, Nankai University, Tianjin, China
| | - Kefan Wang
- Department of Plant Biology and Ecology, College of Life Sciences, Nankai University, Tianjin, China
| | - Zhenlu Qiu
- Department of Plant Biology and Ecology, College of Life Sciences, Nankai University, Tianjin, China
| | - Fuchen Shi
- Department of Plant Biology and Ecology, College of Life Sciences, Nankai University, Tianjin, China
- *Correspondence: Fuchen Shi,
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2
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Rembelski M, Fraterrigo J. Drought reduces invasive grass performance by disrupting plant-microbe interactions that enhance plant nitrogen supply. Oecologia 2023; 201:549-564. [PMID: 36598562 DOI: 10.1007/s00442-022-05307-4] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2022] [Accepted: 12/16/2022] [Indexed: 01/05/2023]
Abstract
Non-native invasive plants can promote their dominance in novel ecosystems by accelerating soil nutrient cycling via interactions with decomposer microbes. Changes in abiotic conditions associated with frequent or prolonged drought may disrupt these interactions, but the effects of disruption on invasive plant performance and the underpinning mechanisms are poorly understood. Here, we used rainout shelters in an experimental field setting to test the hypothesis that drought reduces invasive plant performance by reducing microbial metabolic activity, resulting in decreased nitrogen flow to plants. We imposed growing season drought on populations of the exotic grass Microstegium vimineum, a widespread invasive plant in eastern deciduous forests, and quantified effects on aboveground and belowground biomass, and carbon (C) and nitrogen (N) cycling among plants, decomposers, and soil. Drought resulted in a 24% decrease in soil respiration, a 16% decrease in phenol oxidase enzyme activity, a 12% decrease in dissolved organic N concentration, and a decrease in the C:N ratio of particulate organic matter, suggesting reduced microbial metabolic activity and nutrient mining of soil organic matter. Drought also reduced aboveground Microstegium biomass 33% and increased Microstegium leaf C:N ratio, consistent with a decline in plant N uptake. We conclude that drought can reduce the performance of existing invasive species populations by suppressing plant-microbe interactions that increase nitrogen supply to plants, which may have consequences for the persistence of invasive plants under hydrologic change.
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Affiliation(s)
- Mara Rembelski
- Department of Natural Resources and Environmental Sciences, University of Illinois, Urbana, IL, 61801, USA
| | - Jennifer Fraterrigo
- Department of Natural Resources and Environmental Sciences, University of Illinois, Urbana, IL, 61801, USA. .,Program in Ecology, Evolution and Conservation Biology, University of Illinois, Urbana, IL, 61801, USA.
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Yang R, Fang J, Cao Q, Zhao D, Dong J, Wang R, Liu J. The content, composition, and influencing factors of organic carbon in the sediments of two types of constructed wetlands. Environ Sci Pollut Res Int 2021; 28:49206-49219. [PMID: 33932213 DOI: 10.1007/s11356-021-14134-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [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: 03/01/2021] [Accepted: 04/22/2021] [Indexed: 06/12/2023]
Abstract
Constructed wetland is a common measure for water purification and biodiversity conservation, but the mechanism of carbon storage is still unclear. Here, we researched the content and composition of soil organic carbon (SOC) and the influencing factors in surface sediment in surface flow constructed wetlands (SFCW) and subsurface flow constructed wetlands (SSFCW). Results showed that the content and storage of SOC in SSFCW were significantly higher than those in SFCW. However, the higher proportion of light fraction organic carbon (LFOC) and lower proportion of heavy fraction organic carbon (HFOC) in SSFCW indicated that SSFCW had less stable organic carbon storage than SFCW. The composition of SOC in the two types of constructed wetlands was mainly affected by total nitrogen, which suggesting carbon-nitrogen coupling in constructed wetlands. The abundant microbial species in SSFCW and their positive correlation with SOC could explain the higher carbon storage in SSFCW than in SFCW. In addition, plant biomass was the principle factor limiting LFOC proportion in SFCW, while it was moisture content in SSFCW. The study has important implications for understanding and management of ecological function of carbon sequestration in contrasted wetlands, and also provides a special perspective to understand the carbon storage mechanism in wetlands.
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Affiliation(s)
- Ruirui Yang
- Environment Research Institute, Shandong University, Qingdao, 266237, China
| | - Jiaohui Fang
- Environment Research Institute, Shandong University, Qingdao, 266237, China
| | - Qingqing Cao
- School of Architecture and Urban Planning, Shandong Jianzhu University, Jinan, 250101, China
| | - Di Zhao
- Environment Research Institute, Shandong University, Qingdao, 266237, China
| | - Junyu Dong
- Environment Research Institute, Shandong University, Qingdao, 266237, China
| | - Renqing Wang
- Environment Research Institute, Shandong University, Qingdao, 266237, China
- School of Life Sciences, Shandong University, Qingdao, 266237, China
| | - Jian Liu
- Environment Research Institute, Shandong University, Qingdao, 266237, China.
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Yang R, Dong J, Li C, Wang L, Quan Q, Liu J. The decomposition process and nutrient release of invasive plant litter regulated by nutrient enrichment and water level change. PLoS One 2021; 16:e0250880. [PMID: 33939720 PMCID: PMC8092768 DOI: 10.1371/journal.pone.0250880] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2020] [Accepted: 04/16/2021] [Indexed: 11/25/2022] Open
Abstract
Wetlands are vulnerable to plant invasions and the decomposition of invasive plant litter could make impacts on the ecosystem services of wetlands including nutrient cycle and carbon sequestration. However, few studies have explored the effects of nutrient enrichment and water level change on the decomposition of invasive plant litter. In this study, we conducted a control experiment using the litterbag method to compare the decomposition rates and nutrient release in the litter of an invasive plant Alternanthera philoxeroides in three water levels and two nutrient enrichment treatments. This study found that the water level change and nutrient enrichment showed significant effects on the litter decomposition and nutrient dynamic of A. philoxeroides. The increase of water level significantly reduced the decomposition rate and nutrient release of litter in the nutrient control treatment, whereas no clear relationship was observed in the nutrient enrichment treatment, indicating that the effect of water level change on litter decomposition might be affected by nutrient enrichment. At the late stage of decomposition, the increase of phosphorus (P) concentration and the decrease of the ratio of carbon to P suggested that the decomposition of invasive plant litter was limited by P. Our results suggest that controlling P enrichment in water bodies is essential for the management of invasive plant and carbon sequestration of wetlands. In addition, the new index we proposed could provide a basis for quantifying the impact of invasive plant litter decomposition on carbon cycle in wetlands.
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Affiliation(s)
- Ruirui Yang
- Environment Research Institute, Shandong University, Qingdao, China
| | - Junyu Dong
- Environment Research Institute, Shandong University, Qingdao, China
| | - Changchao Li
- Environment Research Institute, Shandong University, Qingdao, China
| | - Lifei Wang
- Environment Research Institute, Shandong University, Qingdao, China
| | - Quan Quan
- State Key Laboratory of Eco-hydraulics in Northwest Arid Region of China, Xi’an University of Technology, Xi’an, China
| | - Jian Liu
- Environment Research Institute, Shandong University, Qingdao, China
- * E-mail:
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5
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Fraterrigo JM, Rembelski MK. Frequent Fire Reduces the Magnitude of Positive Interactions Between an Invasive Grass and Soil Microbes in Temperate Forests. Ecosystems 2021. [DOI: 10.1007/s10021-021-00615-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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6
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Cao M, Cui L, Sun H, Zhang X, Zheng X, Jiang J. Effects of Spartina alterniflora Invasion on Soil Microbial Community Structure and Ecological Functions. Microorganisms 2021; 9:138. [PMID: 33435501 DOI: 10.3390/microorganisms9010138] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2020] [Revised: 01/06/2021] [Accepted: 01/07/2021] [Indexed: 12/23/2022] Open
Abstract
It has been reported that the invasion of Spartina alterniflora changed the soil microbial community in the mangrove ecosystem in China, especially the bacterial community, although the response of soil fungal communities and soil microbial ecological functions to the invasion of Spartina alterniflora remains unclear. In this study, we selected three different communities (i.e., Spartina alterniflora community (SC), Spartina alterniflora–mangrove mixed community (TC), and mangrove community (MC)) in the Zhangjiangkou Mangrove Nature Reserve in China. High-throughput sequencing technology was used to analyze the impact of Spartina alterniflora invasion on mangrove soil microbial communities. Our results indicate that the invasion of Spartina alterniflora does not cause significant changes in microbial diversity, but it can alter the community structure of soil bacteria. The results of the LEfSe (LDA Effect Size) analysis show that the relative abundance of some bacterial taxa is not significantly different between the MC and SC communities, but different changes have occurred during the invasion process (i.e., TC community). Different from the results of the bacterial community, the invasion of Spartina alterniflora only cause a significant increase in few fungal taxa during the invasion process, and these taxa are at some lower levels (such as family, genus, and species) and classified into the phylum Ascomycota. Although the invasion of Spartina alterniflora changes the taxa with certain ecological functions, it may not change the potential ecological functions of soil microorganisms (i.e., the potential metabolic pathways of bacteria, nutritional patterns, and fungal associations). In general, the invasion of Spartina alterniflora changes the community structure of soil microorganisms, but it may not affect the potential ecological functions of soil microorganisms.
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7
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Yang R, Li K, Fang J, Quan Q, Zhang C, Liu J. The Invasion of Alternanthera philoxeroides Increased Soil Organic Carbon in a River and a Constructed Wetland With Different Mechanisms. Front Ecol Evol 2020. [DOI: 10.3389/fevo.2020.574528] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
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8
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Yang W, Zhang D, Cai X, Xia L, Luo Y, Cheng X, An S. Significant alterations in soil fungal communities along a chronosequence of Spartina alterniflora invasion in a Chinese Yellow Sea coastal wetland. Sci Total Environ 2019; 693:133548. [PMID: 31369894 DOI: 10.1016/j.scitotenv.2019.07.354] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [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: 05/03/2019] [Revised: 07/22/2019] [Accepted: 07/22/2019] [Indexed: 05/24/2023]
Abstract
Plant invasion typically alters the microbial communities of soils, which affects ecosystem carbon (C) and nitrogen (N) cycles. The responses of the soil fungal communities to plant invasion along its chronosequence remain poorly understood. For this study, we investigated variations in soil fungal communities through Illumina MiSeq sequencing analyses of the fungal internal transcribed spacer (ITS) region, and quantitative polymerase chain reaction (qPCR), along a chronosequence (i.e., 9-, 13-, 20- and 23-year-old) of invasive Spartina alterniflora. We compared these variations with those of bare flat in a Chinese Yellow Sea coastal wetland. Our results highlighted that the abundance of soil fungi, the number of operational taxonomic units (OTUs), species richness, and Shannon diversity indices for soil fungal communities were highest in 9-year-old S. alterniflora soil, which gradually declined along the invasion chronosequence. The relative abundance of copiotrophic Basidiomycota revealed significant decreasing trend, while the relative abundance of oligotrophic Ascomycota gradually increased along the S. alterniflora invasion chronosequence. The relative abundance of soil saprotrophic fungi (e.g., undefined saprotrophs) was gradually reduced while symbiotic fungi (e.g., ectomycorrhizal fungi) and pathotrophic fungi (e.g., plant and animal pathogens) progressively increased along the S. alterniflora invasion chronosequence. Our results suggested that S. alterniflora invasion significantly altered soil fungal abundance and diversity, community composition, trophic modes, and functional groups along a chronosequence, via substantially reduced soil litter inputs, and gradually decreased soil pH, moisture, and soil nutrient substrates along the invasion chronosequence, from 9 to 23 years. These changes in soil fungal communities, particularly their trophic modes and functional groups along the S. alterniflora invasion chronosequence could well impact the decomposition and accumulation of soil C and N, while potentially altering ecosystem C and N sinks in a Chinese Yellow Sea coastal wetland.
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Affiliation(s)
- Wen Yang
- College of Life Sciences, Shaanxi Normal University, Xi'an 710119, PR China.
| | - Di Zhang
- College of Life Sciences, Shaanxi Normal University, Xi'an 710119, PR China
| | - Xinwen Cai
- College of Life Sciences, Shaanxi Normal University, Xi'an 710119, PR China
| | - Lu Xia
- School of Life Science and Institute of Wetland Ecology, Nanjing University, Nanjing 210023, PR China
| | - Yiqi Luo
- Center for Ecosystem Science and Society (Ecoss), Department of Biological Sciences, Northern Arizona University, Flagstaff, AZ 86011, USA
| | - Xiaoli Cheng
- Key Laboratory of Aquatic Botany and Watershed Ecology, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 430074, PR China.
| | - Shuqing An
- School of Life Science and Institute of Wetland Ecology, Nanjing University, Nanjing 210023, PR China
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9
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Sugihara S, Shibata M, Mvondo Ze AD, Tanaka H, Kosaki T, Funakawa S. Forest understories controlled the soil organic carbon stock during the fallow period in African tropical forest: a 13C analysis. Sci Rep 2019; 9:9835. [PMID: 31285565 PMCID: PMC6614393 DOI: 10.1038/s41598-019-46406-2] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2019] [Accepted: 06/24/2019] [Indexed: 11/24/2022] Open
Abstract
Soil organic carbon (SOC) dynamics after slash-burn agriculture are poorly understood in African tropical forest, though recent studies have revealed C4 grass invasion as a forest understory influences SOC dynamics after deforestation. This study aimed to quantify the relative SOC contribution of C4 and C3 plants separately through the sequential fallow periods of forest (cropland, or 4–7, 20–30, or >50 years of fallow forest) in the tropical forest of eastern Cameroon. We evaluated the SOC stock and natural 13C abundance for each layer. The SOC stock was largest in 4–7 years fallow forest (136.6 ± 8.8 Mg C ha−1; 100 cm depth, and C4:C3 = 58:42), and decreased with increasing fallow period. SOC from C4 plants was larger in the 4–7 and 20–30 years fallow forests (57.2–60.4 ± 5.8 Mg C ha−1; 100 cm depth), while it clearly decreased in >50 years fallow forest (35.0 ± 4.1 Mg C ha−1; 100 cm depth), resulting in the smallest SOC in this mature forest (106.4 ± 12.9 Mg C ha−1; 100 cm depth). These findings indicate that C4 grass understories contributed to the SOC restoration during early fallow succession in the tropical forest of eastern Cameroon.
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Affiliation(s)
- Soh Sugihara
- Graduate School, Institute of Agriculture, Tokyo University of Agriculture and Technology, Tokyo, 183-8509, Japan.
| | - Makoto Shibata
- Graduate School of Global Environmental Studies, Kyoto University, Kyoto, 606-8501, Japan.,Department of Agro-Food Science, Niigata Agro-Food University, Niigata, 950-3102, Japan
| | | | - Haruo Tanaka
- Graduate School, Institute of Agriculture, Tokyo University of Agriculture and Technology, Tokyo, 183-8509, Japan
| | - Takashi Kosaki
- Graduate School of Global Liberal Arts, Aichi University, Aichi, 453-8777, Japan
| | - Shinya Funakawa
- Graduate School of Global Environmental Studies, Kyoto University, Kyoto, 606-8501, Japan
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10
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Martin PA, Newton AC, Bullock JM. Impacts of invasive plants on carbon pools depend on both species' traits and local climate. Ecology 2018; 98:1026-1035. [PMID: 28036096 DOI: 10.1002/ecy.1711] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/17/2016] [Revised: 11/25/2016] [Accepted: 12/13/2016] [Indexed: 11/06/2022]
Abstract
Invasive plants can alter ecosystem properties, leading to changes in the ecosystem services on which humans depend. However, generalizing about these effects is difficult because invasive plants represent a wide range of life forms, and invaded ecosystems differ in their plant communities and abiotic conditions. We hypothesize that differences in traits between the invader and native species can be used to predict impacts and so aid generalization. We further hypothesize that environmental conditions at invaded sites modify the effect of trait differences and so combine with traits to predict invasion impacts. To test these hypotheses, we used systematic review to compile data on changes in aboveground and soil carbon pools following non-native plant invasion from studies across the World. Maximum potential height (Hmax ) of each species was drawn from trait databases and other sources. We used meta-regression to assess which of invasive species' Hmax , differences in this height trait between native and invasive plants, and climatic water deficit, a measure of water stress, were good predictors of changes in carbon pools following invasion. We found that aboveground biomass in invaded ecosystems relative to uninvaded ones increased as the value of Hmax of invasive relative to native species increased, but that this effect was reduced in more water stressed ecosystems. Changes in soil carbon pools were also positively correlated with the relative Hmax of invasive species, but were not altered by water stress. This study is one of the first to show quantitatively that the impact of invasive species on an ecosystem may depend on differences in invasive and native species' traits, rather than solely the traits of invasive species. Our study is also the first to show that the influence of trait differences can be altered by climate. Further developing our understanding of the impacts of invasive species using this framework could help researchers to identify not only potentially dangerous invasive species, but also the ecosystems where impacts are likely to be greatest.
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Affiliation(s)
- Philip A Martin
- Centre for Ecology and Hydrology, Benson Lane, Wallingford, Oxfordshire, OX10 8BB, UK.,Centre for Conservation Ecology and Environmental Science, School of Applied Sciences, Bournemouth University, Poole, BH12 5BB, UK
| | - Adrian C Newton
- Centre for Conservation Ecology and Environmental Science, School of Applied Sciences, Bournemouth University, Poole, BH12 5BB, UK
| | - James M Bullock
- Centre for Ecology and Hydrology, Benson Lane, Wallingford, Oxfordshire, OX10 8BB, UK
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Culpepper LZ, Wang HH, Koralewski TE, Grant WE, Rogers WE. Understory upheaval: factors influencing Japanese stiltgrass invasion in forestlands of Tennessee, United States. Bot Stud 2018; 59:20. [PMID: 30083978 PMCID: PMC6079111 DOI: 10.1186/s40529-018-0236-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [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: 11/30/2017] [Accepted: 08/02/2018] [Indexed: 06/08/2023]
Abstract
BACKGROUND Invasions by non-native plants contribute to loss of ecosystem biodiversity and productivity, modification of biogeochemical cycles, and inhibition of natural regeneration of native species. Japanese stiltgrass (Microstegium vimineum (Trin.) A. Campus) is one of the most prevalent invasive grasses in the forestlands of Tennessee, United States. We measured the extent of invasion, identified potential factors affecting invasion, and quantified the relative importance of each factor. We analyzed field data collected by the Forest Inventory and Analysis Program of the U.S. Forest Service to measure the extent of invasion from 2005 to 2011 and identified potential factors affecting invasion during this period using boosted regression trees. RESULTS Our results indicated that presence of Japanese stiltgrass on sampled plots increased 50% (from 269 to 404 plots) during the time period. The probability of invasion was correlated with one landscape condition (elevation) (20.5%) and five forest features (including tree species diversity, basal area, stand age, site productivity, and natural regeneration) (79.5%). Boosted regression trees identified the most influential (highly correlated) variables as tree species diversity (30.7%), basal area (22.9%), elevation (20.5%), and stand age (16.7%). Our results suggest that Japanese stiltgrass is likely to continue its invasion in Tennessee forests. CONCLUSIONS The present model, in addition to correlating the probability of Japanese stiltgrass invasions with current climatic conditions and landscape attributes, could aid in the on-going development of control strategies for confronting Japanese stiltgrass invasions by identifying vulnerable areas that might emerge as a result of likely changes in climatic conditions and land use patterns.
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Affiliation(s)
- Lela Z. Culpepper
- Department of Ecosystem Science and Management, Texas A&M University, College Station, TX 77843 USA
| | - Hsiao-Hsuan Wang
- Department of Wildlife and Fisheries Sciences, Texas A&M University, College Station, TX 77843 USA
| | - Tomasz E. Koralewski
- Department of Ecosystem Science and Management, Texas A&M University, College Station, TX 77843 USA
- Present Address: Department of Wildlife and Fisheries Sciences, Texas A&M University, College Station, TX 77843 USA
| | - William E. Grant
- Department of Wildlife and Fisheries Sciences, Texas A&M University, College Station, TX 77843 USA
| | - William E. Rogers
- Department of Ecosystem Science and Management, Texas A&M University, College Station, TX 77843 USA
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Affiliation(s)
- Tyler K. Refsland
- Program in Ecology, Evolution and Conservation Biology University of Illinois Urbana Illinois 61801 USA
| | - Jennifer M. Fraterrigo
- Program in Ecology, Evolution and Conservation Biology University of Illinois Urbana Illinois 61801 USA
- Department of Natural Resources and Environmental Sciences University of Illinois Urbana Illinois 61801 USA
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13
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Tamura M, Suseela V, Simpson M, Powell B, Tharayil N. Plant litter chemistry alters the content and composition of organic carbon associated with soil mineral and aggregate fractions in invaded ecosystems. Glob Chang Biol 2017; 23:4002-4018. [PMID: 28480539 DOI: 10.1111/gcb.13751] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [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: 06/09/2016] [Revised: 03/08/2017] [Accepted: 03/10/2017] [Indexed: 06/07/2023]
Abstract
Through the input of disproportionate quantities of chemically distinct litter, invasive plants may potentially influence the fate of organic matter associated with soil mineral and aggregate fractions in some of the ecosystems they invade. Although context dependent, these native ecosystems subjected to prolonged invasion by exotic plants may be instrumental in distinguishing the role of plant-microbe-mineral interactions from the broader edaphic and climatic influences on the formation of soil organic matter (SOM). We hypothesized that the soils subjected to prolonged invasion by an exotic plant that input recalcitrant litter (Japanese knotweed, Polygonum cuspidatum) would have a greater proportion of plant-derived carbon (C) in the aggregate fractions, as compared with that in adjacent soil inhabited by native vegetation that input labile litter, whereas the soils under an invader that input labile litter (kudzu, Pueraria lobata) would have a greater proportion of microbial-derived C in the silt-clay fraction, as compared with that in adjacent soils that receive recalcitrant litter. At the knotweed site, the higher C content in soils under P. cuspidatum, compared with noninvaded soils inhabited by grasses and forbs, was limited to the macroaggregate fraction, which was abundant in plant biomarkers. The noninvaded soils at this site had a higher abundance of lignins in mineral and microaggregate fractions and suberin in the macroaggregate fraction, partly because of the greater root density of the native species, which might have had an overriding influence on the chemistry of the above-ground litter input. At the kudzu site, soils under P. lobata had lower C content across all size fractions at a 0-5 cm soil depth despite receiving similar amounts of Pinus litter. Contrary to our prediction, the noninvaded soils receiving recalcitrant Pinus litter had a similar abundance of plant biomarkers across both mineral and aggregate fractions, potentially because of the higher surface area of soil minerals at this site. The plant biomarkers were lower in the aggregate fractions of the P. lobata-invaded soils, compared with noninvaded pine stands, potentially suggesting a microbial co-metabolism of pine-derived compounds. These results highlight the complex interactions among litter chemistry, soil biota, and minerals in mediating soil C storage in unmanaged ecosystems; these interactions are particularly important under global changes that may alter plant species composition and hence the quantity and chemistry of litter inputs in terrestrial ecosystems.
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Affiliation(s)
- Mioko Tamura
- Department of Plant and Environmental Sciences, Clemson University, Clemson, SC, USA
| | - Vidya Suseela
- Department of Plant and Environmental Sciences, Clemson University, Clemson, SC, USA
| | - Myrna Simpson
- Department of Physical and Environmental Sciences, University of Toronto, Scarborough, Toronto, ON, Canada
| | - Brian Powell
- Department of Environmental Engineering and Earth Sciences, Clemson University, Clemson, SC, USA
| | - Nishanth Tharayil
- Department of Plant and Environmental Sciences, Clemson University, Clemson, SC, USA
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14
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Sokol NW, Kuebbing SE, Bradford MA. Impacts of an invasive plant are fundamentally altered by a co-occurring forest disturbance. Ecology 2017; 98:2133-2144. [DOI: 10.1002/ecy.1906] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/31/2017] [Revised: 05/02/2017] [Accepted: 05/08/2017] [Indexed: 11/06/2022]
Affiliation(s)
- Noah W. Sokol
- Yale School of Forestry and Environmental Studies; Yale University; 195 Prospect Street New Haven Connecticut 06511 USA
| | - Sara E. Kuebbing
- Yale School of Forestry and Environmental Studies; Yale University; 195 Prospect Street New Haven Connecticut 06511 USA
| | - Mark A. Bradford
- Yale School of Forestry and Environmental Studies; Yale University; 195 Prospect Street New Haven Connecticut 06511 USA
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15
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Wei H, Xu J, Quan G, Zhang J, Qin Z. Invasion effects of Chromolaena odorata
on soil carbon and nitrogen fractions in a tropical savanna. Ecosphere 2017. [DOI: 10.1002/ecs2.1831] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Affiliation(s)
- Hui Wei
- Department of Ecology; College of Natural Resources and Environment; South China Agricultural University; Guangzhou 510642 China
- Key Laboratory of Agro-Environment in the Tropics; Ministry of Agriculture; Guangzhou 510642 China
- Guangdong Engineering Research Center for Modern Eco-agriculture and Circular Agriculture; Guangzhou 510642 China
| | - Jialin Xu
- Department of Ecology; College of Natural Resources and Environment; South China Agricultural University; Guangzhou 510642 China
| | - Guoming Quan
- Guangdong Engineering Research Center for Modern Eco-agriculture and Circular Agriculture; Guangzhou 510642 China
- Department of Urban Construction Engineering; Guangzhou City Polytechnic; Guangzhou 510405 China
| | - Jiaen Zhang
- Department of Ecology; College of Natural Resources and Environment; South China Agricultural University; Guangzhou 510642 China
- Key Laboratory of Agro-Environment in the Tropics; Ministry of Agriculture; Guangzhou 510642 China
- Guangdong Engineering Research Center for Modern Eco-agriculture and Circular Agriculture; Guangzhou 510642 China
| | - Zhong Qin
- Department of Ecology; College of Natural Resources and Environment; South China Agricultural University; Guangzhou 510642 China
- Key Laboratory of Agro-Environment in the Tropics; Ministry of Agriculture; Guangzhou 510642 China
- Guangdong Engineering Research Center for Modern Eco-agriculture and Circular Agriculture; Guangzhou 510642 China
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Craig ME, Fraterrigo JM. Plant-microbial competition for nitrogen increases microbial activities and carbon loss in invaded soils. Oecologia 2017; 184:583-596. [PMID: 28421325 DOI: 10.1007/s00442-017-3861-0] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2016] [Accepted: 03/31/2017] [Indexed: 11/25/2022]
Abstract
Many invasive plant species show high rates of nutrient acquisition relative to their competitors. Yet the mechanisms underlying this phenomenon, and its implications for ecosystem functioning, are poorly understood, particularly in nutrient-limited systems. Here, we test the hypothesis that an invasive plant species (Microstegium vimineum) enhances its rate of nitrogen (N) acquisition by outcompeting soil organic matter-degrading microbes for N, which in turn accelerates soil N and carbon (C) cycling. We estimated plant cover as an indicator of plant N acquisition rate and quantified plant tissue N, soil C and N content and transformations, and extracellular enzyme activities in invaded and uninvaded plots. Under low ambient N availability, invaded plots had 77% higher plant cover and lower tissue C:N ratios, suggesting that invasion increased rates of plant N acquisition. Concurrent with this pattern, we observed significantly higher mass-specific enzyme activities in invaded plots as well as 71% higher long-term N availability, 21% lower short-term N availability, and 16% lower particulate organic matter N. A structural equation model showed that these changes were interrelated and associated with 27% lower particulate organic matter C in invaded areas. Our findings suggest that acquisition of N by this plant species enhances microbial N demand, leading to an increased flux of N from organic to inorganic forms and a loss of soil C. We conclude that high N acquisition rates by invasive plants can drive changes in soil N cycling that are linked to effects on soil C.
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Affiliation(s)
- Matthew E Craig
- Department of Natural Resources and Environmental Sciences, University of Illinois at Urbana-Champaign, 1102 S Goodwin, Urbana, IL, 61801, USA.
- Department of Biology, Indiana University, 1001 E Third St, Bloomington, IN, 47405, USA.
| | - Jennifer M Fraterrigo
- Department of Natural Resources and Environmental Sciences, University of Illinois at Urbana-Champaign, 1102 S Goodwin, Urbana, IL, 61801, USA
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