干旱区生态环境知识资源中心(Arid): The impacts of climate changes and human activities on net primary productivity vary across an ecotone zone in Northwest China

Arid

DOI	10.1016/j.scitotenv.2020.136691
	The impacts of climate changes and human activities on net primary productivity vary across an ecotone zone in Northwest China
	Teng, Mingjun 1; Zeng, Lixiong 2; Hu, Wenjie 1; Wang, Pengcheng 1; Yan, Zhaogui 1; He, Wei 1; Zhang, Yu 1; Huang, Zhilin 2; Xiao, Wenfa 2,3
通讯作者	Wang, Pengcheng
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
ISSN	0048-9697
EISSN	1879-1026
出版年	2020
卷号	714
英文摘要	The variations in net primary productivity (NPP) and its controls are critical to understand the mechanisms that maintain ecosystem services under ongoing climate change and human activities. However, such knowledge is still incomplete in ecotone areas where plant species may reach their physiological thresholds. Our study quantified the variations in NPP and its controls resulting from interannual climate variations and human activities in the Qilian Mountain region (QLMR), an ecotone zone in central Asia. To achieve this goal, three indexes, including actual NPP (ANPP), potential NPP (PNPP), and human-induced NPP (HNPP), and their variations during 2001-2012 were estimated by combining the Carnegie-Ames-Stanford approach and a residual trend method. The results showed that the average PNPP, HNPP and ANPP values across the whole QLMR increased at rates of 4.71, 3.08, and 1.63 g C m(-2) yr(-1), respectively. The ANPP increased in 66.8% of the area during 2001-2012. The impacts of climate variations and human activities on NPP varied across the ecotone zone, vegetation types and altitudinal gradient. Climate-derived impacts caused the ANPP to increase in over 53% of the area in all vegetation ecosystems except forests. Climate variations were expected to account for most of the changes in ANPP in high-altitude zones (above 3500 m). while the impacts of human activities on ANPP were concentrated mainly in mid- and low-elevation zones. Our results suggest that increasing precipitation factor underlying the increase in ANPP in such semiarid regions, while human activity is the primary reason for declines in NPP even if there is vegetation restoration. To improve the functions of vegetation ecosystems in such ecotones, a holistic strategy that combines spatially distinct measures is urgently needed. (C) 2020 Elsevier B.V. All rights reserved.
英文关键词	Net primary productivity (NPP) Climate variation Human activity Ecological restoration Semiarid area
类型	Article
语种	英语
国家	Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000517760200137
WOS关键词	USE EFFICIENCY ; QUANTITATIVE ASSESSMENT ; ALPINE GRASSLAND ; RELATIVE ROLES ; RIVER-BASIN ; PRECIPITATION ; CARBON ; DESERTIFICATION ; VARIABILITY ; ECOSYSTEMS
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/315530
作者单位	1.Huazhong Agr Univ, Coll Hort & Forestry Sci, Hubei Engn Technol Res Ctr Forestry Informat, Wuhan 430070, Peoples R China; 2.Chinese Acad Forestry, Res Inst Forest Ecol Environm & Protect, Beijing 100091, Peoples R China; 3.Nanjing Forestry Univ, Coinnovat Ctr Sustainable Forestry Southern China, Nanjing 210037, Peoples R China
推荐引用方式 GB/T 7714	Teng, Mingjun,Zeng, Lixiong,Hu, Wenjie,et al. The impacts of climate changes and human activities on net primary productivity vary across an ecotone zone in Northwest China[J],2020,714.
APA	Teng, Mingjun.,Zeng, Lixiong.,Hu, Wenjie.,Wang, Pengcheng.,Yan, Zhaogui.,...&Xiao, Wenfa.(2020).The impacts of climate changes and human activities on net primary productivity vary across an ecotone zone in Northwest China.SCIENCE OF THE TOTAL ENVIRONMENT,714.
MLA	Teng, Mingjun,et al."The impacts of climate changes and human activities on net primary productivity vary across an ecotone zone in Northwest China".SCIENCE OF THE TOTAL ENVIRONMENT 714(2020).