干旱区生态环境知识资源中心(Arid): Response of grassland productivity to climate change and anthropogenic activities in arid regions of Central Asia

Arid

DOI	10.7717/peerj.9797
	Response of grassland productivity to climate change and anthropogenic activities in arid regions of Central Asia
	Bi, Xu; Li, Bo; Zhang, Lixin; Nan, Bo; Zhang, Xinshi; Yang, Zihan
通讯作者	Bi, X
来源期刊	PEERJ
ISSN	2167-8359
出版年	2020
卷号	8
英文摘要	Background. Quantitative evaluations of the relative impacts of climate change and anthropogenic activity on grasslands are significant for understanding grassland degradation mechanisms and controlling degraded grasslands. However, our knowledge about the effects of anthropogenic activities and climate change on the grassland in a mountain basin system in arid regions of Central Asia is still subject to great uncertainties. Methods. In this research, we have chosen the net primary productivity (NPP) as an index for revealing grassland dynamics processes. Moreover, the human appropriation of net primary production (NPPH), which was calculated as the potential NPP (NPPp) minus the actual NPP (NPPA), was applied to distinguish the relative influences of climate change and human activities on the grassland NPP variations in a mountain basin system of Central Asia from 2001-2015. Results. The results indicated that the grassland NPPA showed an increasing trend (35.88%) that was smaller than the decreasing trend (64.12%). The respective contributions of human activity, climate change and the two together to the increase in the NPPA were 6.19%, 81.30% and 12.51%, respectively. Human activity was largely responsible for the decrease in the grassland NPPA, with the area experiencing human-induced decreases accounting for 98.21% of the total decreased area, which mainly occurred during spring/autumn pasture and winter pasture. Furthermore, the average grazing pressure index (GPI) values of summer pastures, spring/autumn pasture and winter pastures were 1.04, 3.03 and 1.83, respectively, from 2001-2015. In addition, negative correlations between the NPP and GPI occupied most of the research area (92.41%). Discussion. Our results indicate that: (i) anthropogenic activities were the primary cause of the reduction in the grassland NPP, especially grazing activities. (ii) For areas where the grassland NPP has increased, precipitation was the dominant climatic factor over temperature in controlling the grassland NPP changes in the study area. (iii) The findings of the current research indicate that some measures should be taken to reduce livestock pressure, and artificial grasslands can be built along the Irtysh River and the Ulungur River to relieve grazing pressure on spring/autumn pastures and winter pastures. Our results could provide reliable information for grassland management and the prevention of grassland degradation in arid regions of Central Asia.
英文关键词	Grassland degradation Mountain basin system Climate change Anthropogenic activities Net primary productivity (NPP) Quantitative assessment
类型	Article
语种	英语
开放获取类型	Green Published, gold
收录类别	SCI-E
WOS记录号	WOS:000564039200005
WOS关键词	NET PRIMARY PRODUCTIVITY ; VEGETATION VARIATION ; LAND DEGRADATION ; CHINA ; DESERTIFICATION ; RESTORATION ; ECOSYSTEMS ; DYNAMICS ; IMPACTS ; TRENDS
WOS类目	Multidisciplinary Sciences
WOS研究方向	Science & Technology - Other Topics
来源机构	北京师范大学 ; 北京大学 ; 中国科学院植物研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/325896
作者单位	[Bi, Xu] Shanxi Univ Finance & Econ, Coll Resources & Environm, Taiyuan, Peoples R China; [Bi, Xu; Li, Bo; Nan, Bo; Zhang, Xinshi; Yang, Zihan] Beijing Normal Univ, Fac Geog Sci, Sch Nat Resources, Beijing, Peoples R China; [Zhang, Lixin] Peking Univ, Coll Urban & Environm Sci, Beijing, Peoples R China; [Zhang, Xinshi] Chinese Acad Sci, Inst Bot, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Bi, Xu,Li, Bo,Zhang, Lixin,et al. Response of grassland productivity to climate change and anthropogenic activities in arid regions of Central Asia[J]. 北京师范大学, 北京大学, 中国科学院植物研究所,2020,8.
APA	Bi, Xu,Li, Bo,Zhang, Lixin,Nan, Bo,Zhang, Xinshi,&Yang, Zihan.(2020).Response of grassland productivity to climate change and anthropogenic activities in arid regions of Central Asia.PEERJ,8.
MLA	Bi, Xu,et al."Response of grassland productivity to climate change and anthropogenic activities in arid regions of Central Asia".PEERJ 8(2020).