西洞庭湖区森林景观斑块对构建研究

Construction of forest landscape patch pairs in west Donting lake region

森林景观斑块及斑块对的构建是森林景观斑块耦合网络研究的基础。通过对西洞庭湖区森林景观的分类及相同优势树种、相同龄组的相邻小班的融合,构成了森林景观斑块,利用不同类型斑块间的相邻构成了森林景观斑块对。从研究区域中提取10个由闭合廊道形成的封闭区域得知,在西洞庭湖区的森林景观中,灌木林小班融合度最高,松木幼龄林融合度最低,融合比最低的区域,其斑块对最多,更有利于边缘地带物种多样性的发展,有利于景观类型丰富度的提高和生态功能的发挥。

The constructions of forest landscape patches and pairs of forest landscape patches are the bases of studying forest landscape patches coupled network. Through the classification of the west Dngting lake forest landscape and the fusion of adjacent subcompartments with same dominant tree species and tree age groups, the forest landscape patches were constituted and the pairs of forest landscape patches also were formed by using the adjacent relation different types of patches of forest landscape. Ten closed regions formed by closed corridors were extracted from the studied area. The results show that in the west Dongting lake forest landscape, the fusion degree of the shrub forest sub-compartment fusion was the maximum, that of pine plantations was the lowest, the area that it＇s fusion ratio was the lowest had maximum number of patches, this is more conducive to the development of species diversity of the fringe zones, and the improvement of the richness of landscape types and the raise of ecological function.