中文摘要：

在遥感与地理信息系统的支持下,从2000年的LANDSAT TM影像中提取洞庭湖湿地信息,结合景观结构分析软件FRAGSTATS计算湿地景观指数,采用主成分分析法与方差矩阵分析法选取最能表征湿地结构及功能的核心景观指数,分析洞庭湖区湿地的景观结构特征及功能状态。研究表明：Shannon多样性指数、斑块面积标准差、斑块丰富度密度与景观类型平均分维度最能反应湿地景观的信息及特征;研究区景观格局的空间差异性与组织结构状态具有明显的不均衡性,湿地景观类型比例不均,水田与湖泊景观优势显著;以洞庭湖核心区滨湖的县市和远离湿地核心区的县市为两大群体,在景观格局复杂性和多样性状态中表现出两大群体相似的特征。

英文摘要：

Based on geography information system（GIS） and remote sensing（RS） techniques,the information of wetland of Dongting Lake in 2000 was interpreted using the Landsat TM.Using landscape structure analysis program FRAGSTATS and the method of principal component analysis and covariance matrix analysis,various wetland landscape indices were calculated and major landscape indices were selected to analyze the landscape pattern in Dongting Lake area.The result showed that Shannon Diversity Index,Patch Size coefficient of Standard,Patch Richness Density and Mean Patch Fractal Dimension could well reflect the characteristics of the wetland lanascape.There were obvious differences between the spatial differenciation and the state of structure in the study area,which showed large differences in the proportion of total land area among different types of wetland within the wetland landscape,the distribution of different wetland types was un-even,and the farmland and lake landscape had obvious advantage over the others.The cities both in the lakefront of Dongting Lake core area and in the outer of the lake core area showed the complexity and diversity of landscape pattern.