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DOI | 10.1111/ele.13697 |
Letter: Trophic interactions regulate peatland carbon cycling | |
Wyatt K.H.; McCann K.S.; Rober A.R.; Turetsky M.R. | |
发表日期 | 2021 |
ISSN | 1461023X |
起始页码 | 781 |
结束页码 | 790 |
卷号 | 24期号:4 |
英文摘要 | Peatlands are the most efficient natural ecosystems for long-term storage of atmospheric carbon. Our understanding of peatland carbon cycling is based entirely on bottom-up controls regulated by low nutrient availability. Recent studies have shown that top-down controls through predator-prey dynamics can influence ecosystem function, yet this has not been evaluated in peatlands to date. Here, we used a combination of nutrient enrichment and trophic-level manipulation to test the hypothesis that interactions between nutrient availability (bottom-up) and predation (top-down) influence peatland carbon fluxes. Elevated nutrients stimulated bacterial biomass and organic matter decomposition. In the absence of top-down regulation, carbon dioxide (CO2) respiration driven by greater decomposition was offset by elevated algal productivity. Herbivores accelerated CO2 emissions by removing algal biomass, while predators indirectly reduced CO2 emissions by muting herbivory in a trophic cascade. This study demonstrates that trophic interactions can mitigate CO2 emissions associated with elevated nutrient levels in northern peatlands. © 2021 John Wiley & Sons Ltd. |
关键词 | Algaecarbon dioxideclimate changedecompositionfood webnet ecosystem exchangenutrientspredatortrophic cascadezoogeochemical effects |
英文关键词 | Bacteria (microorganisms); carbon dioxide; animal; biomass; carbon cycle; ecosystem; food chain; predation; Animals; Biomass; Carbon Cycle; Carbon Dioxide; Ecosystem; Food Chain; Predatory Behavior |
语种 | 英语 |
来源期刊 | Ecology Letters |
文献类型 | 期刊论文 |
条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/204514 |
作者单位 | Department of Biology, Ball State University, Muncie, IN 47306, United States; Department of Integrative Biology, University of Guelph, Guelph, ON NIG2WI, Canada; Institute of Arctic and Alpine Research and Ecology and Evolutionary Biology Department, University of Colorado Boulder, Boulder, CO 80309, United States |
推荐引用方式 GB/T 7714 | Wyatt K.H.,McCann K.S.,Rober A.R.,et al. Letter: Trophic interactions regulate peatland carbon cycling[J],2021,24(4). |
APA | Wyatt K.H.,McCann K.S.,Rober A.R.,&Turetsky M.R..(2021).Letter: Trophic interactions regulate peatland carbon cycling.Ecology Letters,24(4). |
MLA | Wyatt K.H.,et al."Letter: Trophic interactions regulate peatland carbon cycling".Ecology Letters 24.4(2021). |
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