气候变化领域集成服务门户(CCPortal): Reducing human activity promotes environmental restoration in arid and semi-arid regions: A case study in Northwest China

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DOI	10.1016/j.scitotenv.2020.144525
	Reducing human activity promotes environmental restoration in arid and semi-arid regions: A case study in Northwest China
	Li, Chuanhua; Wang, Yutao; Wu, Xiaodong; Cao, Hongjuan; Li, Wangping; Wu, Tonghua
通讯作者	Wu, XD (通讯作者)，Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Cryospher Sci, Cryosphere Res Stn Qinghai Tibet Plateau, Lanzhou 730070, Peoples R China.
发表日期	2021
ISSN	0048-9697
EISSN	1879-1026
卷号	768
英文摘要	Human activities have adversely impacted grassland net primary productivity (NPP) across the world, and quantitative estimations of the anthropogenic impacts on NPP (HNPP) can be helpful to improve environmental protection and climate adaptation measures. However, disentangling the effects of climate variability and human activities on NPP is problematic and requires the calculation of potential net primary productivity (PNPP). In this study, we assessed the anthropogenic impacts on NPP in the Shiyang River basin-a typical arid and semi-arid region. We used the seasonal changes in NPP to identify the grids that were not affected by human activity and then proposed a method to calculate PNPP based on the leaf area index (LAI). We estimated the actual net primary productivity (ANPP) using the Carnegie-Ames-Stanford Approach (CASA) model, and the HNPP was then calculated as the difference between ANPP and PNPP. Our results showed that this method for PNPP calculation was reliable. From 2001 to 2016, the positive (90.85 gC.m(-2).a(-1)) and negative effects (-130.21 gC.m(-2).a(-1)) of human activities on NPP accounted for 32.68% and 96.84% of the ANPP, respectively, and the overall average HNPP was -3936 g C.m(2).a(-1). The implementation of ecological and environmental protection projects gradually mitigated the negative effects of human activity on NPP at a rate of 4.55 gC.m(-2).a(-1); however, negative HNPP values still occupied 55.39% of the entire region in 2016. In contrast with the prevailing views that climate change is the main factor accounting for vegetation recovery in arid and semi-arid regions, our results suggest that reducing human activities can significantly promote environmental restoration. The findings of this study suggest that policy makers and stakeholders can restore grassland ecosystems and promote environmental protection by reducing anthropogenic activities in arid and semi-arid regions. (C) 2021 Elsevier B.V. All rights reserved.
英文关键词	Net primary productivity; Grassland; Human activities; CASA model; Ecological environment
语种	英语
WOS研究方向	Environmental Sciences & Ecology
WOS类目	Environmental Sciences
WOS记录号	WOS:000625384700066
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/254319
作者单位	[Li, Chuanhua; Wang, Yutao; Cao, Hongjuan] Northwest Normal Univ, Coll Geog & Environm Sci, Lanzhou 730070, Peoples R China; [Li, Chuanhua; Wu, Xiaodong; Wu, Tonghua] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Cryospher Sci, Cryosphere Res Stn Qinghai Tibet Plateau, Lanzhou 730070, Peoples R China; [Wu, Xiaodong; Wu, Tonghua] Univ Chinese Acad Sci, Beijing 100049, Peoples R China; [Li, Wangping] Lanzhou Univ Technol, Sch Civil Engn, Lanzhou 730050, Peoples R China; [Wu, Tonghua] Southern Marine Sci & Engn Guangdong Lab Guangzho, Guangzhou 511458, Peoples R China
推荐引用方式 GB/T 7714	Li, Chuanhua,Wang, Yutao,Wu, Xiaodong,et al. Reducing human activity promotes environmental restoration in arid and semi-arid regions: A case study in Northwest China[J]. 中国科学院西北生态环境资源研究院,2021,768.
APA	Li, Chuanhua,Wang, Yutao,Wu, Xiaodong,Cao, Hongjuan,Li, Wangping,&Wu, Tonghua.(2021).Reducing human activity promotes environmental restoration in arid and semi-arid regions: A case study in Northwest China.SCIENCE OF THE TOTAL ENVIRONMENT,768.
MLA	Li, Chuanhua,et al."Reducing human activity promotes environmental restoration in arid and semi-arid regions: A case study in Northwest China".SCIENCE OF THE TOTAL ENVIRONMENT 768(2021).