RESOURCES AND ENVIRONMENT IN THE YANGTZE BASIN >> 2006, Vol. 15 >> Issue (3): 195-399.

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CHARACTERISTICS OF KARST ROCKY DESERTIFICATION LAND IN THE SUBTROPICAL ZONE IN CHINA

LI Yang-bing，JIANG Li，BAI Xiao-yong   

  • Received:2005-09-01 Revised:2005-10-25 Online:2006-05-20
  • Contact: LI Yang-bing

Abstract: The degradation land of karst rocky desertification is one of the most serious problems on economic development, ecosystem restoration and reconstruction in Southwest China. Karst rocky desertification is a kind of serious land degradation, including socialeconomical feedback, dynamical feedback and original biology feedback in its degrading processes. Because of the unique ecosystem characters and fragilities of karst ecosystem, karst rocky desertification land has different land degradation characteristics differentiated from other fragile ecoregion as follows: (1) the lithology types difference during the processes of land degradation and restoration; (2) the relativity among land use patterns and land degradation and restoration processes; (3) regional differences and artificial driving mechanism of formation and distribution; (4) the landscape spatial heterogeneity and scale of rocky desertification land; (5) the restoration depend upon soil and topography; (6) the nonrenewable ability of soil resources. Karst land rocky desertification is a kind of functional desertification, and its genesis is the fall and decline of ecosystem services. So, it is beneficial to probe into the characteristics of karst rocky desertification land for the taming as classifications and ecological restoration and reconstruction of land rocky desertification.

Key words: karst, rocky desertification, characteristics

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