乌江流域的生态地质环境

Environment of Ecological Geology of Wujiang River Valley

发育在黔北台隆上的乌江流域,是一个裸露的岩溶山区,其森林立地条件低劣,水土流失后果严重。本文将与生态密切相关的地质环境称为生态地质环境。地质环境和地貌环境是地球表面最基础的环境。在同一气候带里,地质—地貌是引起山区生态分异的根本要素,制约着各种各样的自然景观,控制着地貌形态和土壤性状,支配着水文条件,进而影响着植被性质及其生长发育。而在乌江流域这类植被严重破坏,土壤剧烈侵蚀,基岩普遍裸露的湿润亚热带山区,地质对于生态环境的影响则显得格外突出。

Wujiang River Valley ,developed on the table-land rises in Northern Guizhou, is an exposed karst area, where the Conditions for forests to grow are inferior and soil erosion is serious. In this paper, the writers refer to geological enviornment closely related to biology as the environment of ecological geology. Geological environment and geomorphological environment are basic ones on the earth's surface. In the same atmosphere zone, geology and geomorphology are essential factors in causing mountainous e-cology to differentiate, restricting various natural landscapes. Of these factors, geology is an essential one, controlling geomorphological shapes and soil forms, dominating hydrological conditions and affecting the nature of vegetation and its growth. But in the moist subtropical mountain area like Wujiang River Valley where vegetation is seriously damaged, soil is intensely erosed and original rocks are widely exposed, geology has great influence on biological environment.