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	Long term prevention of disturbance induces the collapse of a dominant species without altering ecosystem function
	Yu Q.; Wu, H. H.; Wang, Z. W.; Flynn, D. F. B.; Yang, H.; Lu, F. M.; Smith, M.; Han, X. G.
	2015
关键词	native tallgrass prairie inner-mongolia community structure plant-communities global change grassland stability dynamics biodiversity diversity
英文摘要	Limitation of disturbances, such as grazing and fire, is a key tool for nature reserve management and ecological restoration. While the role of these disturbances in shaping ecosystem structure and functioning has been intensively studied, less is known about the consequences of long-term prevention of grazing and fire. Based on a 31-year study, we show that relative biomass of the dominant grass, Leymus chinensis, of grasslands in northern China declined dramatically, but only after 21 years of exclusion of fire and grazing. However, aboveground net primary productivity (ANPP) did not decline accordingly due to compensatory responses of several subdominant grass species. The decline in dominance of L. chinensis was not related to gradually changing climate during the same period, whereas experimentally imposed litter removal (simulating fire), mowing (simulating grazing), fire and moderate grazing enhanced dominance of L. chinensis significantly. Thus, our findings show that disturbances can be critical to maintain the dominance of key grass species in semiarid grassland, but that the collapse of a dominant species does not necessarily result in significant change in ANPP if there are species in the community capable of compensating for loss of a dominant.
出处	Scientific Reports
卷	5
收录类别	SCI
语种	英语
ISSN号	2045-2322
内容类型	SCI/SSCI论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/38520]
专题	地理科学与资源研究所_历年回溯文献
推荐引用方式 GB/T 7714	Yu Q.,Wu, H. H.,Wang, Z. W.,et al. Long term prevention of disturbance induces the collapse of a dominant species without altering ecosystem function. 2015.

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