Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1111/gcb.15969 |
Depth-dependent drivers of soil microbial necromass carbon across Tibetan alpine grasslands | |
Mei He; Kai Fang; Leiyi Chen; Xuehui Feng; Shuqi Qin; Dan Kou; Hongbo He; Chao Liang; Yuanhe Yang | |
2021-11-16 | |
发表期刊 | Global Change Biology |
出版年 | 2021 |
英文摘要 | Microbial necromass carbon (C) has been considered an important contributor to persistent soil C pool. However, there still lacks large-scale systematic observations on microbial necromass C in different soil layers, particularly for alpine ecosystems. Besides, it is still unclear whether the relative importance of biotic and abiotic variables such as plant C input and mineral properties in regulating microbial necromass C would change with soil depth. Based on the combination of large-scale sampling along a ~2200 km transect across Tibetan alpine grasslands and biomarker analysis, together with a global data synthesis across grassland ecosystems, we observed a relatively low proportion of microbial-derived C in Tibetan alpine grasslands compared to global grasslands (topsoil: 45.4% vs. 58.1%; subsoil: 41.7% vs. 53.7%). We also found that major determinants of microbial necromass C depended on soil depth. In topsoil, both plant C input and mineral protection exerted dominant effects on microbial necromass C. However, in subsoil, the physico-chemical protection provided by soil clay particles, iron-aluminum oxides, and exchangeable calcium dominantly facilitated the preservation of microbial necromass C. The differential drivers over microbial necromass C between soil depths should be considered in Earth system models for accurately forecasting soil C dynamics and its potential feedback to global warming. |
领域 | 气候变化 ; 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/342058 |
专题 | 气候变化 资源环境科学 |
推荐引用方式 GB/T 7714 | Mei He,Kai Fang,Leiyi Chen,et al. Depth-dependent drivers of soil microbial necromass carbon across Tibetan alpine grasslands[J]. Global Change Biology,2021. |
APA | Mei He.,Kai Fang.,Leiyi Chen.,Xuehui Feng.,Shuqi Qin.,...&Yuanhe Yang.(2021).Depth-dependent drivers of soil microbial necromass carbon across Tibetan alpine grasslands.Global Change Biology. |
MLA | Mei He,et al."Depth-dependent drivers of soil microbial necromass carbon across Tibetan alpine grasslands".Global Change Biology (2021). |
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