Arid
DOI10.1080/15324982.2012.719568
Vegetation in a Post-Ecological Threshold State May Not Recover after Short-Term Livestock Exclusion in Mongolian Rangelands
Sasaki, Takehiro1; Ohkuro, Toshiya2; Kakinuma, Kaoru2; Okayasu, Tomoo2; Jamsran, Undarmaa3; Takeuchi, Kazuhiko2
通讯作者Sasaki, Takehiro
来源期刊ARID LAND RESEARCH AND MANAGEMENT
ISSN1532-4982
EISSN1532-4990
出版年2013
卷号27期号:1页码:101-110
英文摘要

In the present study, we tested the potential irreversibility of vegetation dynamics in Mongolian rangelands using well-studied plant communities that exist along grazing gradients, in which ecological thresholds (defined as the points or zones at which disturbance should be limited to prevent drastic changes in ecological conditions) exist in terms of the compositional changes along these gradients. To accomplish this, we removed livestock grazing impacts by establishing exclosures along a grazing gradient at two study sites located in Mandalgobi and Bulgan, Mongolia. Each exclosure was established in the summer of 2004 at a location with either a post-ecological threshold state or a pre-ecological threshold state. We examined general patterns of temporal change in vegetation for the permanent plots inside and outside each exclosure at each site between 2005 and 2010. The trajectories of floristic composition in the permanent plots outside and inside each exclosure were similar from 2005 to 2010, indicating that the trajectories were mainly associated with annual rainfall and annual phenological changes in the plant communities. Post-threshold states at both sites did not reach their respective target community for restoration, indicating the lack of restorability despite livestock exclusion. Moreover, ordination separated the trajectories of floristic composition for the permanent plots inside exclosure in the post-threshold state from those in the pre-threshold state. Thus, our results suggest that vegetation in a post-threshold state may not recover after short-term livestock exclusion in Mongolian rangelands.


英文关键词alternative stable states arid and semi-arid rangelands ecological threshold rangeland management resilience
类型Article
语种英语
国家Japan ; Mongolia
收录类别SCI-E
WOS记录号WOS:000313679400008
WOS关键词GRAZING GRADIENT ; REGIME SHIFTS ; RESTORATION ; DEGRADATION
WOS类目Environmental Sciences ; Soil Science
WOS研究方向Environmental Sciences & Ecology ; Agriculture
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/175909
作者单位1.Tohoku Univ, Grad Sch Life Sci, Aoba Ku, Sendai, Miyagi 9808578, Japan;
2.Univ Tokyo, Grad Sch Agr & Life Sci, Dept Ecosyst Studies, Tokyo, Japan;
3.Mongolian State Univ Agr, Ctr Ecosyst Study, Ulaanbaatar, Mongolia
推荐引用方式
GB/T 7714
Sasaki, Takehiro,Ohkuro, Toshiya,Kakinuma, Kaoru,et al. Vegetation in a Post-Ecological Threshold State May Not Recover after Short-Term Livestock Exclusion in Mongolian Rangelands[J],2013,27(1):101-110.
APA Sasaki, Takehiro,Ohkuro, Toshiya,Kakinuma, Kaoru,Okayasu, Tomoo,Jamsran, Undarmaa,&Takeuchi, Kazuhiko.(2013).Vegetation in a Post-Ecological Threshold State May Not Recover after Short-Term Livestock Exclusion in Mongolian Rangelands.ARID LAND RESEARCH AND MANAGEMENT,27(1),101-110.
MLA Sasaki, Takehiro,et al."Vegetation in a Post-Ecological Threshold State May Not Recover after Short-Term Livestock Exclusion in Mongolian Rangelands".ARID LAND RESEARCH AND MANAGEMENT 27.1(2013):101-110.
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