湛江市土地利用结构及生态服务价值研究

Study on the Structure and Ecological Services Value of Land Use in Zhanjiang

利用湛江市1996—2005年土地利用变更调查数据和相关统计资料,计算土地利用结构异质性指数和生态服务价值,分析土地利用结构与生态服务价值的变化及其相互关系。结果表明:1996—2005年湛江市土地利用结构多样性指数和均匀度增加而优势度降低,土地利用趋于多样化和均匀化;除牧草地外,其他各类土地的生态服务价值都有不同程度的增加,土地利用生态服务价值总体呈增加趋势;土地利用生态服务价值与土地利用结构线性相关,通过增加水域、湿地和林地等生态用地面积,提高土地利用集约度和促进土地利用的多样化、均匀化,可以增加生态系统稳定性和提高生态系统服务功能的经济价值。

Using the land use investigation data in Zhanjiang from 1996 to 2005,this paper calculated the land use heterogeneity and ecological services value, analyzed the change of land use structure and ecological services value and their relationship. The results showed that the diversity indices and evenness indices of land use increased but the dominance indices of land use decreased and the trend of land use were diversification and evenness,and the ecological services value of all land use types increased in different degree except for grassland in Zhanjiang from 1996 to 2005. It also indicated the linear correlation between the structure and ecological services value of land use ecosystem and the stabilization and ecological services value of land use ecosystem can be improved by increasing the area of ecological land, such as water, wetland and woodland, utilizing land intensively and promoting the diversification and evenness of land use.