IMHE OpenIR  > Journal of Mountain Science  > Journal of Mountain Science-2013  > Vol10 No.4
Restoration Prospects for Heitutan Degraded Grassland inthe Sanjiangyuan
LI Xi-lai; PERRY LW George; BRIERLEY Gary; GAO Jay; ZHANG Jing; YANG Yuan-wu
Corresponding AuthorLI Xi-lai
2013-08
Source PublicationJournal of Mountain Science
Volume10Issue:4Pages:687-698
AbstractIn 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.
KeywordHeitutan Degraded Grassland Alpine Meadow Restoration/rehabilitation Sanjiangyuan Qinghai-tibet Plateau (Qtp)
Language英语
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/5673
CollectionJournal of Mountain Science_Journal of Mountain Science-2013_Vol10 No.4
Corresponding AuthorLI Xi-lai
Recommended Citation
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.
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