Loss of density dependence underpins decoupling of livestock population and plant biomass in intensive grazing systems

doi:10.1002/eap.2450

	Loss of density dependence underpins decoupling of livestock population and plant biomass in intensive grazing systems
	Li, Ang ; Chen, Shi 1,2
	2021
发表期刊	ECOLOGICAL APPLICATIONS
ISSN	1051-0761
卷号	31 期号:8
摘要	Across the world, social-ecological rangeland systems have been transformed from a preindustrial extensive status to intensive exploitation, often leading to long-term livestock population booms, overgrazing, and rangeland degradation. To understand the regulatory mechanisms involved in such historical social-ecological transformations, we collected population data on the native sheep of the last nomadic county in the Inner Mongolia Autonomous Region (1961-2005). We detected changes in internal feedbacks (e.g., density-dependent effects) and external disturbance (e.g., winter harshness, rainfall, harvest) between the extensive and intensive management periods using regression models of sheep population growth rate and counterfactual analyses. We found that, in the extensive period, sheep populations were regulated during harsh winters by climate, while they were regulated during mild winters by negative density dependence. In the intensive period, the negative feedback of density dependence was removed through the provision of additional forage and shelter, and only winter climate and growing season rainfall regulated sheep populations. Counterfactual analyses also confirmed the irreplaceable role of density-dependence in maintaining a sustainable rangeland ecosystem. Although herders attempted to adapt to the removal of negative feedbacks by improving livestock harvest, overgrazing and grassland degradation remain a challenge in this system. We conclude that internal feedbacks within social-ecological systems should be carefully anticipated and accounted for when managing rangelands for sustainability.
关键词	density dependence grassland degradation livestock population booms Mongolian Plateau nomadism regime shift sedentary social-ecological system
学科领域	Ecology ; Environmental Sciences
DOI	10.1002/eap.2450
收录类别	SCI
语种	英语
WOS关键词	GRASSLAND DEGRADATION ; INNER-MONGOLIA ; RANGELANDS ; CLIMATE ; NONEQUILIBRIUM ; DYNAMICS ; DROUGHTS
WOS研究方向	Science Citation Index Expanded (SCI-EXPANDED) ; Social Science Citation Index (SSCI)
WOS记录号	WOS:000703509500001
出版者	WILEY
文献子类	Article
出版地	HOBOKEN
EISSN	1939-5582
资助机构	National Natural Science Foundation of China [31971484] ; Chinese Ministry of Science and Technology through the National Basic Research Program of China [2016YFC0500706] ; Strategic Priority Research Program of the Chinese Academy of Sciences [XDA23080401, XDA26010301]
作者邮箱	lyons@ibcas.ac.cn
引用统计	被引频次：2[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/2S10CLM1/26686
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 North Carolina Charlotte, Dept Publ Hlth Sci, Charlotte, NC 28223 USA 3.Univ North Carolina Charlotte, Sch Data Sci, Charlotte, NC 28223 USA
推荐引用方式 GB/T 7714	Li, Ang,Chen, Shi. Loss of density dependence underpins decoupling of livestock population and plant biomass in intensive grazing systems[J]. ECOLOGICAL APPLICATIONS,2021,31(8).
APA	Li, Ang,&Chen, Shi.(2021).Loss of density dependence underpins decoupling of livestock population and plant biomass in intensive grazing systems.ECOLOGICAL APPLICATIONS,31(8).
MLA	Li, Ang,et al."Loss of density dependence underpins decoupling of livestock population and plant biomass in intensive grazing systems".ECOLOGICAL APPLICATIONS 31.8(2021).

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