Root, not aboveground litter, controls soil carbon storage under grazing exclusion across grasslands worldwide

doi:10.1002/ldr.4008

	Root, not aboveground litter, controls soil carbon storage under grazing exclusion across grasslands worldwide
	Su, Jishuai ; Xu, Fengwei 1,2
	2021
发表期刊	LAND DEGRADATION & DEVELOPMENT
ISSN	1085-3278
卷号	32 期号:11 页码:3326-3337
摘要	Grazing exclusion is a common management strategy for improving grasslands degraded due to overgrazing. Although previous meta-analyses proved that grazing exclusion improved soil carbon (C) storage of grasslands in China, we know little about its effect on grassland ecosystems elsewhere and whether litter accumulation induced by grazing exclusion regulates soil C storage. Using meta-analysis, we integrated 91 publications to examine the effects of grazing exclusion on community litter and soil C storage, accompanied by analysis of the regulating roles of body size of herbivore, climatic conditions, and grazing exclusion duration. We found that grazing exclusion enhanced litter biomass and decomposition rate but did not change litter chemical quality. Generally, grazing exclusion enhanced plant production and soil C storage across grassland worldwide. Exclusion of medium and small herbivores had stronger effects on aboveground litter production and soil C storage than exclusion of large herbivores, and grazing exclusion's enhancement on litter production and soil C storage tended to increase as grazing exclusion proceeded. Notably, grazing exclusion-induced increase in aboveground litter biomass was attributed to the increase in biomass of graminoids, while root biomass, not aboveground litter biomass, primarily regulated the increase in soil C storage. The stimulating effect of grazing exclusion on soil C storage was enhanced possibly due to enhanced root biomass response along a precipitation gradient. Generally, our study provided new insights that management practice under grazing exclusion should take plant community dynamics, grazing exclusion duration, preceding grazer type, and climate conditions into account simultaneously.
关键词	grazing exclusion grazing exclusion duration herbivore body size litter root biomass soil carbon storage
学科领域	Environmental Sciences ; Soil Science
DOI	10.1002/ldr.4008
收录类别	SCI
语种	英语
WOS关键词	INNER-MONGOLIA ; ORGANIC-CARBON ; TERRESTRIAL ECOSYSTEMS ; COMMUNITY STRUCTURE ; LARGE HERBIVORES ; PLANT LITTER ; BIOMASS ALLOCATION ; NITROGEN ADDITION ; FUNCTIONAL TRAITS ; TYPICAL STEPPE
WOS研究方向	Science Citation Index Expanded (SCI-EXPANDED)
WOS记录号	WOS:000661611800001
出版者	WILEY
文献子类	Article
出版地	HOBOKEN
EISSN	1099-145X
资助机构	Natural Science Foundation of China [31901139] ; Postdoctoral Science Foundation of China [2019M650890]
作者邮箱	xfw21@sina.com
引用统计	被引频次：15[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/2S10CLM1/26427
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, Peoples R China 2.Chinese Acad Forestry, Res Inst Forestry, Beijing 100091, Peoples R China 3.Natl Forestry & Grassland Adm, Grassland Res Ctr, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Su, Jishuai,Xu, Fengwei. Root, not aboveground litter, controls soil carbon storage under grazing exclusion across grasslands worldwide[J]. LAND DEGRADATION & DEVELOPMENT,2021,32(11):3326-3337.
APA	Su, Jishuai,&Xu, Fengwei.(2021).Root, not aboveground litter, controls soil carbon storage under grazing exclusion across grasslands worldwide.LAND DEGRADATION & DEVELOPMENT,32(11),3326-3337.
MLA	Su, Jishuai,et al."Root, not aboveground litter, controls soil carbon storage under grazing exclusion across grasslands worldwide".LAND DEGRADATION & DEVELOPMENT 32.11(2021):3326-3337.

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