贵州连续性石灰岩小流域石漠化景观格局研究  

Landscape Pattern of Rocky Desertification for Homogenous Limestone Minor Catchments in Guizhou

作　　者：谭秋[1] 

机构地区：[1]贵州师范大学地理与环境科学学院,贵阳550001

出　　处：《矿物岩石地球化学通报》2009年第3期217-222,共6页Bulletin of Mineralogy, Petrology and Geochemistry

基　　金：国家重点基础研究发展计划项目(2006CB403201);贵州省科学技术基金资助项目(黔科合J字[2008]2012号)

摘　　要：本文选择三个典型的连续性石灰岩为基底,以不同地貌区域的小流域为研究对象,分析了石漠化景观格局。结果表明,从高原区到峡谷区,石漠化的面积大体相当,强度上则愈加严重;景观形状指数和破碎度指数渐增,蔓延度指数渐减。景观多样性指数和均匀度指数以斜坡区最高,峡谷区次之。连续性石灰岩小流域的生态环境对地貌区带变化敏感,从高原区到峡谷区,石漠化的主要驱动力中人为因素逐渐减少,自然营力作用逐步加强。Three homogenous limestone catchments in different landform areas were selected to analyze for their landscape patterns of rocky desertification. Although the rocky desertification areas in the study regions are nearly equivalent, the rocky desertification degrees are gradually serious from plateau region to valley region. Both the landscape shape index and the landscape fragmentation index of these catchments gradually increase, but the landscape contagion index decrease. The highest landscape diversity index and the landscape evenness index are found in the slope region and then in the valley region. Ecological environment of these minor catchments is sensitive to the regional geomorphology variations. From plateau to valley, natural force gradually substitutes human disturbance to be the main driving force of rocky desertification.

关 键 词：喀斯特 景观指数 石漠化治理 

分 类 号：X171[环境科学与工程—环境科学]