1990-2014年长江中游经济带生态系统服务价值时空变化特征

Spatiotemporal Dynamics of Ecosystem Service Value in Middle Yangtze River Economic Region from 1990 to 2014

基于1990—2014年长江中游经济带土地利用变化过程,参照"中国生态系统单位面积生态系统服务价值当量表",采用Costanza的计算模型估算生态系统服务价值并分析其时空变化特征。结果表明:1990—2014年间,长江中游经济带生态系统服务价值增加113.84亿元,年均增长0.016%,总体呈"山区>丘陵区>平原区"的空间分布格局,上升区集中于江汉平原南部及洞庭湖平原西部,下降区主要沿"石首市—渝水区—九江县"分布;从不同功能价值来看,区域供给、支持服务功能价值分别下降28.08亿元,35.55亿元,调节、文化服务价值分别上升156.90亿元,20.57亿元,供给、支持和文化服务价值均呈山区高、平原低的分布格局,调节服务价值高值、低值区均集中于平原区,4种生态功能价值主要沿"石首市—渝水区—九江县"下降,调节、文化服务价值在江汉平原南部及洞庭湖平原西部上升,支持服务价值在江汉平原西南部上升,供给服务价值无上升集中区。

Using Middle Yangtze River Economic Belt as the study area,based on the land use data,corrected‘the equivalent value per unit area of ecosystem service in China’proposed by XIE Gao-di,estimation of spatiotemporal change of ecosystem service value(ESV)was conducted.The results are shown as follows.During the period of 1990-2014,the ESV of Middle Yangtze River Economic Belt had increased 11.38 billion yuan,annual growing rate was 0.016%.The spatial distribution pattern of ESV presented as the order:mountainous >hilly >plains.The rising area of ESV concentrated in the south of Jianghan Plain and the west of Dongting Lake Plain,while the areas with decreasing ESV mainly distributed along the line of‘Shishou-Yushui-Jiujiang’.Supply and support service value had deceased 2.81 billion yuan and 3.56 billion yuan,while accommodation service and cultural service values had increased 15.69 billion yuan and 2.06 billion yuan.The spatial distribution characteristics of supply,support,cultural service values were similar,and presented as the high values in the mountains and low value in the plain,while both the high and low values of accommodation service value concentrated in the plain.Four ecosystem service function values decreased along the line of‘Shishou-Yushui-Jiujiang’,while spatial distribution of rising values was different,and presented as the accommodation and cultural value rise in the south of Jianghan Plain and the west of Dongting Lake Plain,support value rose in the southwest of Jianghan Plain,and the rise of supply service value was not obvious.