NDLI: Patch-level based vegetation change and environmental drivers in Tarim River drainage area of West China

Content Provider	Springer Nature Link
Author	Kong, Weijing Sun, Osbert Jianxin Chen, Yaning Yu, Yi Tian, Ziqiang
Copyright Year	2010
Abstract	Information on vegetation-related land cover change and the principle drivers is critical for environmental management and assessment of desertification processes in arid environments. In this study, we investigated patch-level based changes in vegetation and other major land cover types in lower Tarim River drainage area in Xinjiang, West China, and examined the impacts of environmental factors on those changes. Patterns of land cover change were analyzed for the time sequence of 1987–1999–2004 based on satellite-derived land classification maps, and their relationships with environmental factors were determined using Redundancy Analysis (RDA). Environmental variables used in the analysis included altitude, slope, aspect, patch shape index (fractal dimension), patch area, distance to water body, distance to settlements, and distance to main roads. We found that during the study period, 26% of the land experienced cover changes, much of which were the types from the natural riparian and upland vegetation to other land covers. The natural riparian and upland vegetation patches were transformed mostly to desert and some to farmlands, indicating expanding desertification processes of the region. A significant fraction of the natural riparian and upland vegetation experienced a phase of alkalinity before becoming desert, suggesting that drought is not the exclusive environmental driver of desertification in the study area. Overall, only a small proportion of the variance in vegetation-related land cover change is explainable by environmental variables included in this study, especially during 1987–1999, indicating that patch-level based vegetation change in this region is partly attributable to environmental perturbations. The apparent transformation from the natural riparian and upland vegetation to desert indicates an on-going process of desertification in the region.
Starting Page	1447
Ending Page	1455
Page Count	9
File Format	PDF
ISSN	09212973
Journal	Landscape Ecology
Volume Number	25
Issue Number	9
e-ISSN	15729761
Language	English
Publisher	Springer Netherlands
Publisher Date	2010-07-02
Publisher Place	Dordrecht
Access Restriction	Subscribed
Subject Keyword	Arid environment Desertification Environmental perturbations Patch dynamics RDA Vegetation change West China Plant Sciences Ecology Forestry Plant Ecology Landscape Ecology Forestry Management
Content Type	Text
Resource Type	Article
Subject	Geography, Planning and Development Ecology Nature and Landscape Conservation

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