25年来江苏盐城沿海滩涂生态系统服务价值研究

Study on ecosystem service value of coastal beach in Yancheng,Jiangsu province over the past 25 years

本文以生态系统较为复杂的江苏盐城沿海滩涂为研究对象,选取3个典型地区,利用1994-2018年7个时间序列的遥感影像,解译土地利用类型数据,对研究区生态系统服务价值进行测算。结果表明:(1)1994-2018年研究区土地利用类型面积总体呈现“二增四减一平”态势,即基塘、建设用地增加,农用地、草滩、盐田、泥滩面积减少,河流面积基本稳定;(2)研究区生态系统服务总价值(ESV)总体呈增长趋势,从1994年到2018年增加了20.29亿元,其中,滩涂湿地分布区域和城乡接合区域的ESV下降幅度最为明显;(3)通过对该地区敏感性分析,各生态系统类型敏感性指数均小于1,说明各系数对ESV的影响较小。

Taking the coastal beach area around Yancheng,Jiangsu province with relatively complex ecosystem as the research object,based on three typical areas,this paper uses 7 time series remote sensing image data from 1994 to 2018,interprets land use type data,and measures the ecosystem service value of the research area.The results show that:(1)The results show that from 1994 to 2018,the land use types and areas in the study area generally showed a trend of“two increases,four decreases and one stability”,that is,the foundation pond and construction land increased,the agricultural land,grass beach,salt field and mudflat decreased,and the river area was basically stable.(2)The total value of ecosystem services(ESV)in the study area showed an overall growth trend,It have increased 2.029 billion from 1994 to 2018.Among them,the ESV in the distribution area of tidal wetlands and the urban-rural fringe area decreased most significantly.(3)The sensitivity analysis results show that the sensitivity index of each ecosystem type is less than 1,indicating that each coefficient has a small impact on ESV.