Restoration Prospects for Heitutan Degraded Grassland inthe Sanjiangyuan
文献类型：期刊论文
| 作者 | LI Xi-lai ; PERRY LW George ; BRIERLEY Gary ; GAO Jay ; ZHANG Jing ; YANG Yuan-wu |
| 刊名 | Journal of Mountain Science
 |
| 出版日期 | 2013-08 |
| 卷号 | 10期号:4页码:687-698 |
| 关键词 | Heitutan degraded grassland Alpine meadow Restoration/rehabilitation Sanjiangyuan Qinghai-Tibet Plateau (QTP) |
| 通讯作者 | LI Xi-lai |
| 英文摘要 | In many ecosystems ungulates have coexisted with grasslands over long periods of time. However, high densities of grazing animals may change the floristic and structural characteristics of vegetation, reduce biodiversity, and increase soil erosion, potentially triggering abrupt and rapid changes in ecosystem condition. Alternate stable state theory provides a framework for understanding this type of dynamic. In the Sanjiangyuan atop the Qinghai-Tibetan plateau (QTP), grassland degradation has been accompanied by irruptions of native burrowing animals, which has accentuated the loss of ground cover. Severely degraded areas of alpine meadows are referred to as ‘Heitutan’. Here, using the framework of alternate stable state theory, we describe the proximate and ultimate drivers of the formation of Heitutan on the QTP, and we assess prospects for recovery, in relation to the degree of biophysical alteration, of these alpine meadows. Effective rehabilitation measures must address the underlying causes of degradation rather than their symptoms. Heitutan degradation is not uni-causal. Rather it reflects different mechanisms operating at different spatio-temporal scales across this vast region. Underlying causes include overly aggressive exploitation of the grasslands (e.g. overgrazing), amplification of grazing and erosion damage by small mammals when outbreaks occur, and/or climate change. Given marked variability in environmental conditions and stressors, restorative efforts must vary across the region. Restoration efforts are likely to yield greatest success if moderately and severely degraded areas are targeted as the first priority in management programmes, before these areas are transformed into extreme Heitutan. |
| 语种 | 英语 |
| 公开日期 | 2013-07-15 |
| 源URL | [http://ir.imde.ac.cn/handle/131551/5673]  |
| 专题 | 成都山地灾害与环境研究所_Journal of Mountain Science _Journal of Mountain Science-2013_Vol10 No.4 |
| 推荐引用方式 GB/T 7714 | LI Xi-lai,PERRY LW George,BRIERLEY Gary,et al. Restoration Prospects for Heitutan Degraded Grassland inthe Sanjiangyuan[J]. Journal of Mountain Science,2013,10(4):687-698. |
| APA | LI Xi-lai,PERRY LW George,BRIERLEY Gary,GAO Jay,ZHANG Jing,&YANG Yuan-wu.(2013).Restoration Prospects for Heitutan Degraded Grassland inthe Sanjiangyuan.Journal of Mountain Science,10(4),687-698. |
| MLA | LI Xi-lai,et al."Restoration Prospects for Heitutan Degraded Grassland inthe Sanjiangyuan".Journal of Mountain Science 10.4(2013):687-698. |
入库方式： OAI收割
来源：成都山地灾害与环境研究所
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