漓江流域景观格局演变对生态系统服务价值的影响

Impact of Landscape Pattern Evolution on Ecosystem Services Value in Lijiang River Basin

景观格局演变必然影响生态系统服务供给,探讨二者关系,对于实现区域可持续发展具有重要意义。基于1986、2001、2016年3期Landsat遥感影像,提取景观类型数据,分析漓江流域景观格局演变对生态系统服务价值的影响。结果表明:30年来林地一直是漓江流域的优势景观,面积增加,农田和水体减少,建设用地和裸地增加,草地先减后增;研究区生态服务价值持续增加,净增7.50亿元,林地对生态服务价值贡献率最大,是生态服务价值增加的主要来源,生态系统的调节、支持等服务性功能远大于生产和文化性功能;生态系统服务价值存在明显的空间分异,中间河谷地带低、四周山林地区高;优势斑块面积扩大、斑块间保持良好自然连通性,景观类型的均匀性、异质性降低有利于生态系统服务价值的增加。研究揭示了景观格局与生态服务变化的关系,可为漓江流域景观可持续管理提供科学参考。

The evolution of landscape patterns inevitably affects the supply of ecosystem services.It is of great significance to explore the relationship between them for regional sustainable development.Based on the Landsat images of Lijiang River Basin in the 1986,2001,2016 period,this research extracts the landscape types to analyze the impacts on ecosystem services values of landscape patterns.The results show that woodland has been the dominant landscape of the Lijiang River Basin for 30 years,with an increase in areas.The areas of farmland and waterbody decreased,construction land and bare land increased,and grassland first decreased and then increased.The ecosystem services value constantly increased,with a net value of 750 million yuan.Woodland contributed the most to the ecosystem services value,serving as the main source of the increase.The function of ecosystem regulation and support was greater than that of production and culture.There were obvious spatial differences in the ecosystem services value,low in the middle valley area and high in the surrounding mountains.The expansion of the dominant patch areas and good natural connectivity between patches,and the decrease of uniformity and heterogeneity of landscape types were conducive to the increase of the ecosystem services value.The research reveals the relationship between landscape patterns and ecological services changes,which provides scientific references for landscape sustainable management in Lijiang River Basin.