Global patterns of soil autotrophic respiration and its relation to climate, soil and vegetation characteristics
Global patterns of soil autotrophic respiration and its relation to climate, soil and vegetation characteristics
复制标题
土壤自养呼吸的全球模式及其与气候、土壤和植被特征的关系
DOI：
10.1016/j.geoderma.2020.114339
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发表时间：
2020-06
期刊：
影响因子：
6.1
通讯作者：
Liang Jingjing
中科院分区：
文献类型：
--
作者：
Tang Xiaolu;Pei Xiangjun;Lei Ningfei;Luo Xinrui;Liu Liang;Shi Leilei;Chen Guo;Liang Jingjing
Soil autotrophic respiration (RA) is one of the key components of carbon and nutrient cycling in terrestrial ecosystems. Despite conflicting findings on the dominant climatic, edaphic and vegetation controls of RA from localized studies, little is known about global RA patterns and their potential drivers. To fill the knowledge gap, we evaluated the direct and indirect effects of climatic, edaphic and vegetation variables on global RA using regression analysis and a structural equation model (SEM) based on the most updated Global Soil Respiration Dataset with 499 observations. Results showed that mean (±standard deviation) RA was 358 ± 283 g C m−2yr−1across global terrestrial ecosystems and differed significantly among forest ecosystems, croplands and grasslands (p< 0.01), highlighting the importance of vegetation on RA. Mean RA was the highest in evergreen broad-leaf forests (633 ± 397 g C m−2yr−1) and the lowest in deciduous needle-leaf forests (226 ± 170 g C m−2yr−1). RA was positively correlated with mean annual temperature and precipitation, gross primary production (GPP), ecosystem respiration (ER) and total belowground carbon allocation (TBCA), whereas it was negatively correlated with silt and clay contents, and a unimodal relation was observed between RA and sand content with a maximum at 68%. These findings implied that the amount of carbon respired from roots back into the atmosphere may increase in the context of long-term climate change, mediated by soil and vegetation. SEM analysis indicated that TBCA was the most important factor controlling RA, accounting for 50% of the variation in RA at the global scale. Globally, RA ratios to GPP and ER were 20% and 23%, respectively, which, combined with developed global GPP and ER products, provide a new concept to estimate the spatiotemporal patterns of RA at regional or global scales. However, to increase the reliability of global RA estimates using these two ratios, more simultaneous observations of RA, ER or GPP from different ecosystems are strongly recommended.
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影响因子：
9.8
作者：
Zhang Y;Xiao X;Wu X;Zhou S;Zhang G;Qin Y;Dong J
通讯作者：
Dong J
影响因子：
6.2
作者：
Bo Zhao;Jing Cao;Yan-Yan Geng-Yan;Xiu-hai Zhao;K. von Gadow
通讯作者：
Bo Zhao;Jing Cao;Yan-Yan Geng-Yan;Xiu-hai Zhao;K. von Gadow
DOI：
--
发表时间：
--
期刊：
--
影响因子：
--
作者：
Deborah;-A.;Clark;Sandra Brown;David;-W.;Kicklighter;Jeffrey;-Q.;Chambers;John;-R.;
通讯作者：
Deborah;-A.;Clark;Sandra Brown;David;-W.;Kicklighter;Jeffrey;-Q.;Chambers;John;-R.;
影响因子：
4
作者：
K. Pregitzer;M. Laskowski;A. Burton;Veronica C. Lessard;D. Zak
通讯作者：
K. Pregitzer;M. Laskowski;A. Burton;Veronica C. Lessard;D. Zak
影响因子：
6.2
作者：
Pumpanen, J;Kolari, P;Hari, P
通讯作者：
Hari, P