1990-2020年科尔沁沙地生态系统服务价值变化研究

基于科尔沁沙地1990-2020年4个时期的影像解译数据，分析该区土地利用变化特征；利用生态系统服务价值当量表，估算科尔沁沙地生态系统服务价值演变特征。结果表明：研究期内，科尔沁沙地耕地、城乡工矿居民地、沙地和其他未利用土地面积呈增加趋势，其余土地利用类型呈减少趋势，各土地利用类型面积主要由草地转化而来；耕地和林地的生态系统服务价值量增加显著，增幅分别为0.69%/a、2.65%/a，而草地和水域的生态系统服务价值呈下降态势。在科尔沁沙地逐步实施土地沙漠化治理工程，优化与调控土地利用结构，合理开发沙产业项目，是该区生态环境可持续发展的主要方式。

Ecosystem service value of Horqin Sandy Land during 1990 to 2020

The dynamic data of land use change in Horqin in 1990, 2000, 2010 and 2020 were extracted from remote sensing images. Based on the constructed ecosystem service value equivalent table, the change of ecosystem service value caused by land use change in Horqin was calculated. The results show that: from 1990 to 2020, the land use change in Horqin is obvious, the area of cultivated land, urban and rural industrial and mining residential land, sandy land and other areas show an increasing trend, the area of grassland and water area shows a decreasing trend, and the land use type mainly develops from grassland to cultivated land and woodland. The ecosystem service value of cultivated land and forest land increased by 0.69% and 2.65% per year, respectively. The ecosystem service value of grassland and water area decreased year by year, while that of sandy land and other unused land decreased first and then increased. In the future regional planning, we should strengthen the protection of sandy land, grassland, woodland and water area, optimize the land use structure and improve the service function of regional ecosystem.