Loss of density dependence underpins decoupling of livestock population and plant biomass in intensive grazing systems
文献类型：期刊论文
| 作者 | Li, Ang; Chen, Shi1,3 |
| 刊名 | ECOLOGICAL APPLICATIONS
 |
| 出版日期 | 2021 |
| 卷号 | 31期号:8 |
| 关键词 | density dependence grassland degradation livestock population booms Mongolian Plateau nomadism regime shift sedentary social-ecological system |
| ISSN号 | 1051-0761 |
| DOI | 10.1002/eap.2450 |
| 文献子类 | Article |
| 英文摘要 | 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. |
| 学科主题 | Ecology ; Environmental Sciences |
| 出版地 | HOBOKEN |
| 电子版国际标准刊号 | 1939-5582 |
| 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) |
| 语种 | 英语 |
| WOS记录号 | WOS:000703509500001 |
| 出版者 | WILEY |
| 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] |
| 源URL | [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.Univ North Carolina Charlotte, Dept Publ Hlth Sci, Charlotte, NC 28223 USA 2.Univ North Carolina Charlotte, Sch Data Sci, Charlotte, NC 28223 USA 3.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China |
| 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). |
入库方式： OAI收割
来源：植物研究所
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