干旱区生态环境知识资源中心(Arid): Desertification dynamic and the relative roles of climate change and human activities in desertification in the Heihe River Basin based on NPP

Arid

	Desertification dynamic and the relative roles of climate change and human activities in desertification in the Heihe River Basin based on NPP
	Zhou Wei; Sun Zhengguo; Li Jianlong; Gang Chengcheng; Zhang Chaobin
来源期刊	Journal of Arid Land
ISSN	1674-6767
出版年	2013
卷号	5 期号:4 页码:465-479
英文摘要	Relative roles of climate change and human activities in desertification are the hotspot of research on desertification dynamic and its driving mechanism.To overcome the shortcomings of existing studies,this paper selected net primary productivity(NPP) as an indicator to analyze desertification dynamic and its impact factors.In addition,the change trends of actual NPP,potential NPP and HNPP(human appropriation of NPP,the difference between potential NPP and actual NPP) were used to analyze the desertification dynamic and calculate the relative roles of climate change,human activities and a combination of the two factors in desertification.In this study,the Moderate Resolution Imaging Spectroradiometer(MODIS)-Normalised Difference Vegetation Index(NDVI) and meteorological data were utilized to drive the Carnegie-Ames-Stanford Approach(CASA) model to calculate the actual NPP from 2001 to 2010 in the Heihe River Basin.Potential NPP was estimated using the Thornthwaite Memorial model.Results showed that 61% of the whole basin area underwent land degradation,of which 90.5% was caused by human activities,8.6% by climate change,and 0.9% by a combination of the two factors.On the contrary,1.5% of desertification reversion area was caused by human activities and 90.7% by climate change,the rest 7.8% by a combination of the two factors.Moreover,it was demonstrated that 95.9% of the total actual NPP decrease was induced by human activities,while 69.3% of the total actual NPP increase was caused by climate change.The results revealed that climate change dominated desertification reversion,while human activities dominated desertification expansion.Moreover,the relative roles of both climate change and human activities in desertification possessed great spatial heterogeneity.Additionally,ecological protection policies should be enhanced in the Heihe River Basin to prevent desertification expansion under the condition of climate change.
英文关键词	desertification net primary productivity(NPP) climate change human activities quantitative assessment Heihe River Basin
类型	Article
语种	英语
开放获取类型	Bronze
收录类别	CSCD
WOS研究方向	Environmental Sciences & Ecology
CSCD记录号	CSCD:4906461
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/335251
作者单位	Zhou Wei, School of Life Science,Nanjing University, Nanjing, Jiangsu 210093, China.; Sun Zhengguo, School of Life Science,Nanjing University, Nanjing, Jiangsu 210093, China.; Li Jianlong, School of Life Science,Nanjing University, Nanjing, Jiangsu 210093, China.; Gang Chengcheng, School of Life Science,Nanjing University, Nanjing, Jiangsu 210093, China.; Zhang Chaobin, School of Life Science,Nanjing University, Nanjing, Jiangsu 210093, China.
推荐引用方式 GB/T 7714	Zhou Wei,Sun Zhengguo,Li Jianlong,et al. Desertification dynamic and the relative roles of climate change and human activities in desertification in the Heihe River Basin based on NPP[J],2013,5(4):465-479.
APA	Zhou Wei,Sun Zhengguo,Li Jianlong,Gang Chengcheng,&Zhang Chaobin.(2013).Desertification dynamic and the relative roles of climate change and human activities in desertification in the Heihe River Basin based on NPP.Journal of Arid Land,5(4),465-479.
MLA	Zhou Wei,et al."Desertification dynamic and the relative roles of climate change and human activities in desertification in the Heihe River Basin based on NPP".Journal of Arid Land 5.4(2013):465-479.