气候变化领域集成服务门户(CCPortal): Spatiotemporal variations of Alxa national public welfare forest net primary productivity in northwest China and the response to climate change

CCPortal

DOI	10.1002/eco.2377
	Spatiotemporal variations of Alxa national public welfare forest net primary productivity in northwest China and the response to climate change
	Xi, Haiyang; Feng, Qi; Cheng, Wenju; Si, Jianhua; Yu, Tengfei
发表日期	2021
ISSN	1936-0584
EISSN	1936-0592
英文摘要	Net primary productivity (NPP) is an important index to evaluate vegetation growth. This study used MODIS remote sensing image data during growing seasons to calculate the normalized difference vegetation index (NDVI) and surface water stress coefficient (W-epsilon) and then utilized Carnegie-Ames-Stanford-Approach (CASA) model to estimate the NPP of Alxa public welfare forest. Furthermore, the impacts of national policy, temperature and precipitation on spatiotemporal variations of NPP were also discussed. The results showed that: (1) Significant changes of NDVI and vegetation NPP of Alxa public welfare forest were found since the beginning of the monitoring in 2010. The NDVI of the forest area increased during 2010-2018 from 0.110 to 0.122. In most areas, NDVI showed a significant or insignificant increasing trend. (2) Obviously spatial differences of the distribution of vegetation NPP in Alxa public welfare forest were detected. The vegetation NPP increased from 50.41 to 58.61 gC center dot m(-2)center dot a(-1) during 2010-2018, with an average NPP of 53.95 gC center dot m(-2)center dot a(-1). (3) National policy was the dominant factor affecting the increase of vegetation NPP of Alxa public welfare forest. In addition, among the meteorological factors investigated, precipitation was the main factor affecting the spatial variation of NPP. There was a positive correlation between precipitation and NPP in 63% of the regions, whereas the spatial correlation between temperature and NPP was generally weak. This study could provide a macroscopic basis for the monitoring of vegetation growth in Alxa public welfare forest in recent 10 years.
英文关键词	Alxa national public welfare forest; CASA model; climate change; NDVI; net primary productivity
WOS研究方向	Environmental Sciences & Ecology ; Water Resources
WOS类目	Ecology ; Environmental Sciences ; Water Resources
WOS关键词	CASA MODEL ; VEGETATION ; TERRESTRIAL
WOS记录号	WOS:000716553400001
来源期刊	ECOHYDROLOGY
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/239424
作者单位	[Xi, Haiyang; Feng, Qi; Cheng, Wenju; Si, Jianhua; Yu, Tengfei] Chinese Acad Sci, Alxa Desert Ecohydrol Expt Res Stn, Key Lab Ecohydrol Inland River Basin, Northwest Inst Ecoenvironm & Resources, Lanzhou, Gansu, Peoples R China; [Cheng, Wenju] Univ Chinese Acad Sci, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Xi, Haiyang,Feng, Qi,Cheng, Wenju,et al. Spatiotemporal variations of Alxa national public welfare forest net primary productivity in northwest China and the response to climate change[J]. 中国科学院西北生态环境资源研究院,2021.
APA	Xi, Haiyang,Feng, Qi,Cheng, Wenju,Si, Jianhua,&Yu, Tengfei.(2021).Spatiotemporal variations of Alxa national public welfare forest net primary productivity in northwest China and the response to climate change.ECOHYDROLOGY.
MLA	Xi, Haiyang,et al."Spatiotemporal variations of Alxa national public welfare forest net primary productivity in northwest China and the response to climate change".ECOHYDROLOGY (2021).