东洞庭湖湿地景观空间结构的完整性分析

选取2005年东洞庭湖湿地的遥感影像,利用GIS技术、MapInfo Professional7.0 SCP软件和景观结构分析软件FRAGSTATS,应用景观生态学的理论和方法,对东洞庭湖湿地景观空间结构的完整性进行了分析。结果表明：（1）区域内斑块分维数相差不大,但沼泽和库塘湿地受人为干扰明显且形状规则,其分维数趋近于1。（2）区域内湿地景观类型体系中各类湿地所占比例差异不大,分配较均匀;多样性较低,优势度不明显;整个区域的破碎化程度较低,但各类景观类型破碎化程度差异明显,相对破坏性较大。（3）由于人类垦殖影响,斑块间隙指数较高。上述分析,为东洞庭湖湿地资源的开发和保护提供参阅资料和依据。

Analysis on Spatial Structural Integrity of Wetland Landscape in the East Dongting Lake

Choosing a remote sensing image for the East Dongting Lake wetland（2005）,using GIS,MapInfo Professional7.0 and landscape structure analysis program FRAGSTATS, applying to theory and method of landscape ecology,the paper analyses spatial structural integrity of wetland landscape in the East Dongting Lake.The results show that：（1）The fractal dimension of patch is a little difference.However,the swamp wetland and pond wetland have been obviously interfered by human activities,their shapes are regular,and their fractal dimensions of patches are close to 1.（2）There is a little different proportions among each kind of wetland in the type system of wetland landscape,their distributions are also relatively even;The diversity is relatively low,and the predo minance is not very obviously.The degree of fragmentations of the wetland landscape is relatively low in the region,but their differences of degree of fragmentations are obviously,the devastation is relatively great.（3）On account of human activities,the index of patch clearance is relatively high.Analyses above have been providing some reference data and advice for exploiting and protecting wetland resources in the East Dongting Lake.