DOI: 10.1111/ele.13697
论文题名: Letter: Trophic interactions regulate peatland carbon cycling
作者: Wyatt K.H. ; McCann K.S. ; Rober A.R. ; Turetsky M.R.
刊名: Ecology Letters
ISSN: 1461023X
出版年: 2021
卷: 24, 期: 4 起始页码: 781
结束页码: 790
语种: 英语
中文关键词: 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
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. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/166955
Appears in Collections: 气候变化与战略
There are no files associated with this item.
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
Recommended Citation:
Wyatt K.H.,McCann K.S.,Rober A.R.,et al. Letter: Trophic interactions regulate peatland carbon cycling[J]. Ecology Letters,2021-01-01,24(4)