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| Discuss on Concepts of Rock Desertification and Rock Desert in Karst Region |
| LI Yang-bing1,2, WANG Shi-jie1, RONG Li1,2 |
1. National Key Laboratory of Environmental Geochemistry, Geochemistry Institute, Chinese Academy of Sciences, Guiyang 550002, China;
2. School of Geographical and Biological Sciences, Guizhou Normal University, Guiyang 550001, China |
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Abstract Karst rock desertification has been recently regarded as a kind of geological-ecological disaster resulting in more and more intense economic, environmental and social effect, but basic researches on it lagged ecological construction. This paper summarizes current classification and problems of karst rock desertification. Different rock desertification types should adopt conservation, restoration, reallocation and preservation respectively based on analyses to the running processes of karst ecosystem including geological, biological and artificial processes. The karst rock desertification processes exist geological rock desertification, ecosystem rock desertification and artificially accelerating rock desertification. Rock desert is the last or the climax result of rock desertification processes, and different from rock desertification in space-time category. The formation of rock desert has much matter with the large slope gradient under natural conditions, but the distribution of artificially accelerating rock desertification has no direct relation with topography and geomorphologic position. It is suggested that the rock desertified lands resulting from artificially accelerating rock desertification should be classified into no-rock desertification land, rock desertification land and reversed "benchmark" land based on regionalization indicators "disturbed mode+vegetation+soil+geomorphology".
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Received: 22 August 2003
Published: 20 December 2004
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2004, Vol. 24 
