韶山市土地利用变化对周围土地生态服务价值的影响

Impacts of Land Use Change on Ecological Service Value of Land Surrounding Shaoshan City

[目的]分析湖南省韶山市土地利用变化及生态服务价值变化,探讨土地利用变化对周围土地生态服务价值的影响,为土地利用变化与生态服务价值的相关研究以及生态服务价值评估体系的确定提供科学参考。[方法]利用1985和2020年的两期遥感影像通过遥感解译提取土地利用数据,基于生态服务的基本定义,综合考虑土地利用变化和土地生态服务价值的关系。[结果]①韶山市土地利用的转换主要发生在林地、耕地和草地之间,林地的单一土地动态度最大,约为3%;②1985—2020年韶山市生态服务价值逐年增加,由12.66亿元上升到22.01亿元,其中林地对生态服务价值的贡献率最大,约为70%;③研究期内,韶山市土地利用变化对周围土地生态服务价值的遥相关增加值为4.67亿元。土地利用变化对周围土地生态服务价值的影响随距离增加而减小,直到达到某一临界距离。不同地类转换其临界距离也各不相同。其中土地利用类型转换为水体时其临界距离最大,约为100个斑块。[结论]1985—2020年韶山市土地利用变化对周围土地的生态服务价值产生了较大影响。今后在土地规划时应综合考虑土地利用变化对周围土地的影响。以期更好地实现经济与环境的协调发展。

[Objective]The change of land use and ecological service value in Shaoshan City,Hunan Province was analyzed to discusse the impacts of land use change on the surrounding land ecological service value,in order to provide a scientific reference for the related research of land use change and ecological service value,and to determine an ecological service value evaluation system.[Methods]Using remote sensing images in 1985 and 2020,land use data were extracted by remote sensing interpretation.Based on the basic definition of ecosystem service,land use change and the relationship between land ecosystem service value were comprehensively considered.A related concept was put forward and a remote correlation model was built.The surrounding land ecosystem service value following land use change was discussed.[Results]①Land use conversion mainly occurred between forest land,cropland,and grassland,and the land dynamic attitude of forest land was the largest(about 3%).②The value of ecosystem services in Shaoshan City increased year by year from 1.266 billion yuan in 1985 to 2.201 billion yuan in 2020,and the contribution rate of forest land to the ecosystem services value was 70%.③During the study period,the remote correlation added value of land use change to the surrounding land ecosystem service value was 467 million yuan.The impact of land use change on the value of surrounding land ecosystem services decreased with increasing distance,until a critical distance was reached,and the critical distance varied with different land types.When land use type was converted to water body,the critical distance was the largest,about 100 patches(land type conversion area).[Conclusion]In the future,the impact of land use change on surrounding land should be comprehensively considered in land planning so as to formulate reasonable land use policy,optimize land use structure,and realize the coordinated development of economy and environment in Shaoshan City.