气候变化领域集成服务门户(CCPortal): Letter: Trophic interactions regulate peatland carbon cycling

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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	Algae carbon dioxide climate change decomposition food web net ecosystem exchange nutrients predator trophic cascade zoogeochemical 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).