Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1111/ele.13697 |
Trophic interactions regulate peatland carbon cycling | |
Kevin H. Wyatt; Kevin S. McCann; Allison R. Rober; Merritt R. Turetsky | |
2021-02-07 | |
发表期刊 | Ecology Letters |
出版年 | 2021 |
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. |
领域 | 资源环境 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/313902 |
专题 | 资源环境科学 |
推荐引用方式 GB/T 7714 | Kevin H. Wyatt,Kevin S. McCann,Allison R. Rober,et al. Trophic interactions regulate peatland carbon cycling[J]. Ecology Letters,2021. |
APA | Kevin H. Wyatt,Kevin S. McCann,Allison R. Rober,&Merritt R. Turetsky.(2021).Trophic interactions regulate peatland carbon cycling.Ecology Letters. |
MLA | Kevin H. Wyatt,et al."Trophic interactions regulate peatland carbon cycling".Ecology Letters (2021). |
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