NDLI: Long-term vegetation changes in the four mega-sandy lands in Inner Mongolia, China

Content Provider	Springer Nature Link
Author	Zhou, Daojing Zhao, Xia Hu, Huifeng Shen, Haihua Fang, Jingyun
Copyright Year	2015
Abstract	Desertification in China has become one of the most serious ecological and social problems. The four mega-sandy lands (Hulunbeir, Horqin, Otindag, and Mu Us) in Inner Mongolia are reported to be the most widespread and seriously desertified areas in China.To explore changes of vegetation activity and the possible driving forces in the four mega-sandy lands over the last three decades.We investigated spatiotemporal variations in the growing-season (May–September) normalized difference vegetation index (NDVI) and their relationships with climate factors and human activities during 1982–2011, using two NDVI datasets from Global Inventory Modelling and Mapping Studies (GIMMS) and Moderate Resolution Imaging Spectroradiometer (MODIS).We found a significant overall NDVI increase in Mu Us, but no such trends in the other three. A significant increase was in south and northeast Mu Us and southeast Horqin, and a decrease in south Hulunbeir, northwest Horqin, and central Otindag. NDVI trends were positively correlated with precipitation and uncorrelated with temperature and wind speed in all sandy lands except Mu Us.NDVI trends showed a large spatial heterogeneity in the four sandy lands. Precipitation was a major determiner for the interannual variations and spatial patterns of NDVI at regional scale, whereas human activities were the cause of NDVI variations at local scale. The consistent interannual variations between two NDVI datasets of GIMMS and MODIS for all four sandy lands suggested that GIMMS NDVI was appropriate for investigating long-term vegetation changes in sandy lands.
Starting Page	1613
Ending Page	1626
Page Count	14
File Format	PDF
ISSN	09212973
Journal	Landscape Ecology
Volume Number	30
Issue Number	9
e-ISSN	15729761
Language	English
Publisher	Springer Netherlands
Publisher Date	2015-01-15
Publisher Place	Dordrecht
Access Restriction	Subscribed
Subject Keyword	Climate change Human activity Desertification Sandy land Vegetation change NDVI Landscape Ecology Plant Ecology Forestry Management Forestry Ecology Plant Sciences
Content Type	Text
Resource Type	Article
Subject	Geography, Planning and Development Ecology Nature and Landscape Conservation

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