辽河三角洲地区土地利用及生态服务价值变化研究

以辽河三角洲地区为例,利用修正的生态服务价值当量因子表结合服务价值评估方法,分析了3个时期土地利用格局时空动态变化特征及其服务价值变化状况。结果表明:研究区土地利用以水田为主,占56.76%,其次为湿地和建设用地,分别占15.29%和14.77%,3种土地利用类型占总面积的86.82%;1986~2000年土地利用格局变化较大,而2000~2010年土地利用格局变化程度较小,两个时段内建设用地面积都稳步增加,湿地面积均逐渐下降;研究区土地利用服务的总价值逐年减少,湿地服务价值对总服务价值的贡献度最大,占总服务价值的60%以上。

Land Use Pattern and Ecological Service Changes in Liaohe Delta

In this paper,Liaohe Delta was taken as the study target.Correction factors of the ecological service value equivalent table was used in combination with the ecosystem service value assessment to analyze the spatial-temporal dynamic variation characteristics of land use patterns in three periods as well as the service value changes.The results showed that the land use structure was mainly composed by paddy field (56.76％),followed by wetland (15.29％) and construction land (14.77％),accounting for 86.82％ of the total area.Land use pattern changed quickly from 1986 to 2000 but slowly from 2000 to 2010.A common feature during these two periods was that the area of construction land increased steadily,but that of wetland decreased gradually.The total value of land use ecological service reduced year by year.Wetland service value contributed the most to the total service value,accounting for over 60％.