DU Xue-lian1, WANG Shi-jie2*
(1．Department of Resources and Environment Management，Guizhou College of Finance and Economics，Guiyang 550004，China;
2．State Key Laboratory of Environmental Geochemistry，Institute of Geochemistry, Chinese Academy of Sciences，Guiyang 550002，China)
Abstract: On the basis of practical field exploration and measures, we studied the type, characteristics, combination and microclimate of micro-habitats in the Wangjiazhai catchment, a typical karst desertification area in Guizhou Province. Plant resource use on micro-habitats was also studied in the paper. The results showed that the types of micro-habitats include stony surface, soil surface, stony gully and stony crevice in the study area, the combination of micro-habitats includes stony surface, stony surface -soil surface and stony surface -stony gully, stony surface .The micro-habitat severe degreesfollow the order of stony surface > soil surface > stony gully >stony crevice and the severe degrees increase with increasing degree of karst rocky desertification in various micro-habitats. Plants mainly grow in stony gully and stony crevice and plant resource use efficiency on various micro-habitats follows the order of stony crevice> stony gully> soil surface> stony surface by the average numbers of trees in per unit area. With the process of karst rocky desertification, the community density firstly increases, and then declines in various micro-habitats.
Key words: karst rocky desertification; micro-habitat; microclimate
E-Mail: wangshijie@vip.skleg.cn
EARTH AND ENVIRONMENT Vol. 38, No.3, Tot No.281, 2010, Page 255-261
