普者黑岩溶湿地景观格局演变及驱动机制研究

Landscape Pattern Change and the Driving Mechanism of the Puzhehei Karst Lake Wetland

利用1990～2015年的6期遥感影像数据,结合GIS技术和景观格局指数方法,从景观整体格局和景观单一格局两个方面探讨了普者黑岩溶湿地不同时空尺度的景观格局变化。结果表明,25年来林地、农地、建筑用地面积增加,湿地、未利用地面积逐年减少,其中,2005～2010年湿地面积减少速度最快,减少率达到39.2%;整体景观类型破碎度降低,多样性指数和均匀度指数减小,蔓延度指数增加,景观分布不均匀。

Using Remote Sensing Image Data of 1990 ~2015, combining with GIS technology and landscape index method, from the aspects of overall pattern and a single pattern landscape, analyzed the variation characteristics of Puzhehei Karst landscape pattern and driving forces of wetland Basin. The results showd that the area of forest, farmland and building land have increased, whereas the wetland and unused land have decreased since the last 25 years. Significantly, the reduction rate of wetlands area is the fastest and reaches 39.2 percent from 2005 to 2010. Overall landscape fragmentation reduced, diversity index and evenness index decreased contagion index increased. landscape uneven distribution appeared, and other characteristics displayed. Drivers factos show that the variation of Puzhehei karst lake wetland Landscape Pattern is related to human factors and natural factors, however, the changes in rainfall lead an impact on the landscape pattern Puzhehei karst wetland basin, but some human factors are still the main driving factors,such as population growth, economic development and social policy regulation.