Depth-dependent drivers of soil microbial necromass carbon across Tibetan alpine grasslands

doi:10.1111/gcb.15969

	Depth-dependent drivers of soil microbial necromass carbon across Tibetan alpine grasslands
	He, Mei ; Fang, Kai 1; Chen, Leiyi ; Feng, Xuehui 1; Qin, Shuqi 1; Kou, Dan 2; He, Hongbo 3; Liang, Chao 3; Yang, Yuanhe1
	2022
发表期刊	GLOBAL CHANGE BIOLOGY
ISSN	1354-1013
卷号	28 期号:3 页码:936-949
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 similar to 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.
关键词	carbon cycle carbon-climate feedback deep soil microbial residue mineral protection plant carbon input
学科领域	Biodiversity Conservation ; Ecology ; Environmental Sciences
DOI	10.1111/gcb.15969
收录类别	SCI
语种	英语
WOS关键词	ORGANIC-MATTER ; AMINO-SUGARS ; LITTER DECOMPOSITION ; ROOT DISTRIBUTIONS ; MURAMIC ACID ; PLANT INPUTS ; STABILIZATION ; COMMUNITIES ; TURNOVER ; PATTERNS
WOS研究方向	Science Citation Index Expanded (SCI-EXPANDED)
WOS记录号	WOS:000719061300001
出版者	WILEY
文献子类	Article
出版地	HOBOKEN
EISSN	1365-2486
资助机构	National Natural Science Foundation of China [31825006, 31988102, 91837312] ; Second Tibetan Plateau Scientific Expedition and Research (STEP) [2019QZKK0106] ; Key Research Program of Frontier Sciences, Chinese Academy of Sciences [QYZDB-SSW--SMC049]
作者邮箱	yhyang@ibcas.ac.cn
引用统计	被引频次：117[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ibcas.ac.cn/handle/2S10CLM1/28692
专题	植被与环境变化国家重点实验室
作者单位	1.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China 2.Univ Chinese Acad Sci, Beijing, Peoples R China 3.Univ Eastern Finland, Dept Environm & Biol Sci, Kuopio, Finland 4.Chinese Acad Sci, Inst Appl Ecol, Shenyang, Peoples R China
推荐引用方式 GB/T 7714	He, Mei,Fang, Kai,Chen, Leiyi,et al. Depth-dependent drivers of soil microbial necromass carbon across Tibetan alpine grasslands[J]. GLOBAL CHANGE BIOLOGY,2022,28(3):936-949.
APA	He, Mei.,Fang, Kai.,Chen, Leiyi.,Feng, Xuehui.,Qin, Shuqi.,...&Yang, Yuanhe.(2022).Depth-dependent drivers of soil microbial necromass carbon across Tibetan alpine grasslands.GLOBAL CHANGE BIOLOGY,28(3),936-949.
MLA	He, Mei,et al."Depth-dependent drivers of soil microbial necromass carbon across Tibetan alpine grasslands".GLOBAL CHANGE BIOLOGY 28.3(2022):936-949.

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