Knowledge Management System of Northwest Institute of Plateau Biology, CAS
Long term prevention of disturbance induces the collapse of a dominant species without altering ecosystem function | |
Yu, Qiang1,2; Wu, Honghui1; Wang, Zhengwen1; Flynn, Dan F. B.3,4; Yang, Hao5; Lu, Fumei6; Smith, Melinda2; Han, Xingguo1,7 | |
2015-09-21 | |
发表期刊 | SCIENTIFIC REPORTS |
卷号 | 5期号:1页码:1 |
文章类型 | Article |
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. |
WOS标题词 | Science & Technology |
关键词[WOS] | NATIVE TALLGRASS PRAIRIE ; INNER-MONGOLIA ; COMMUNITY STRUCTURE ; PLANT-COMMUNITIES ; GLOBAL CHANGE ; GRASSLAND ; STABILITY ; DYNAMICS ; BIODIVERSITY ; DIVERSITY |
收录类别 | SCI |
语种 | 英语 |
WOS研究方向 | Science & Technology - Other Topics |
WOS类目 | Multidisciplinary Sciences |
WOS记录号 | WOS:000361464900001 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://210.75.249.4/handle/363003/5506 |
专题 | 中国科学院西北高原生物研究所 |
作者单位 | 1.Chinese Acad Sci, Inst Appl Ecol, State Key Lab Forest & Soil Ecol, Shenyang 110016, Peoples R China 2.Colorado State Univ, Dept Biol, Grad Degree Program Ecol, Ft Collins, CO 80523 USA 3.Chinese Acad Sci, Northwest Inst Plateau Biol, Global Change & Alpine Ecosyst Res Lab, Xining 810008, Peoples R China 4.Univ Zurich, Inst Evolutionary Biol & Environm Studies, CH-8057 Zurich, Switzerland 5.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China 6.Shenzhen Baoan Qianlong Sch, Shenzhen 518131, Peoples R China 7.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China |
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,2015,5(1):1. |
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,5(1),1. |
MLA | Yu, Qiang,et al."Long term prevention of disturbance induces the collapse of a dominant species without altering ecosystem function".SCIENTIFIC REPORTS 5.1(2015):1. |
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