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DOI | 10.1111/ele.13906 |
Nonlinear responses of ecosystem carbon fluxes to nitrogen deposition in an old-growth boreal forest | |
Aijun Xing; Enzai Du; Haihua Shen; Longchao Xu; Wim de Vries; Mengying Zhao; Xiuyuan Liu; Jingyun Fang | |
2021-10-25 | |
发表期刊 | Ecology Letters
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出版年 | 2021 |
英文摘要 | Nitrogen (N) deposition is known to increase carbon (C) sequestration in N-limited boreal forests. However, the long-term effects of N deposition on ecosystem carbon fluxes have been rarely investigated in old-growth boreal forests. Here we show that decade-long experimental N additions significantly stimulated net primary production (NPP) but the effect decreased with increasing N loads. The effect on soil heterotrophic respiration (Rh) shifted from a stimulation at low-level N additions to an inhibition at higher levels of N additions. Consequently, low-level N additions resulted in a neutral effect on net ecosystem productivity (NEP), due to a comparable stimulating effect on NPP and Rh, while NEP was increased by high-level N additions. Moreover, we found nonlinear temporal responses of NPP, Rh and NEP to low-level N additions. Our findings imply that actual N deposition in boreal forests likely exerts a minor contribution to their soil C storage. |
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/340975 |
专题 | 资源环境科学 |
推荐引用方式 GB/T 7714 | Aijun Xing,Enzai Du,Haihua Shen,et al. Nonlinear responses of ecosystem carbon fluxes to nitrogen deposition in an old-growth boreal forest[J]. Ecology Letters,2021. |
APA | Aijun Xing.,Enzai Du.,Haihua Shen.,Longchao Xu.,Wim de Vries.,...&Jingyun Fang.(2021).Nonlinear responses of ecosystem carbon fluxes to nitrogen deposition in an old-growth boreal forest.Ecology Letters. |
MLA | Aijun Xing,et al."Nonlinear responses of ecosystem carbon fluxes to nitrogen deposition in an old-growth boreal forest".Ecology Letters (2021). |
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