Long term prevention of disturbance induces the collapse of a dominant species without altering ecosystem function

NWIPB OpenIR

	Long term prevention of disturbance induces the collapse of a dominant species without altering ecosystem function
	Yu, Qiang ; Wu, Honghui ; Wang, Zhengwen ; Flynn, Dan F. B. ; Yang, Hao ; Lu, Fumei ; Smith, Melinda ; Han, Xingguo
	2015-09-21
发表期刊	SCIENTIFIC REPORTS ; Yu, Qiang,Wu, Honghui,Wang, Zhengwen,et al. Long term prevention of disturbance induces the collapse of a dominant species without altering ecosystem function[J]. SCIENTIFIC REPORTS,2015,5(1):1.
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.; 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.
文献类型	期刊论文
条目标识符	http://210.75.249.4/handle/363003/22384
专题	中国科学院西北高原生物研究所
推荐引用方式 GB/T 7714	Yu, Qiang,Wu, Honghui,Wang, Zhengwen,et al. Long term prevention of disturbance induces the collapse of a dominant species without altering ecosystem function[J]. SCIENTIFIC REPORTS, Yu, Qiang,Wu, Honghui,Wang, Zhengwen,et al. Long term prevention of disturbance induces the collapse of a dominant species without altering ecosystem function[J]. SCIENTIFIC REPORTS,2015,5(1):1.,2015.
APA	Yu, Qiang.,Wu, Honghui.,Wang, Zhengwen.,Flynn, Dan F. B..,Yang, Hao.,...&Han, Xingguo.(2015).Long term prevention of disturbance induces the collapse of a dominant species without altering ecosystem function.SCIENTIFIC REPORTS.
MLA	Yu, Qiang,et al."Long term prevention of disturbance induces the collapse of a dominant species without altering ecosystem function".SCIENTIFIC REPORTS (2015).