利用GEE平台的长时间序列Landsat影像,获取了2005-2020年每5年的土地利用数据,并采用价值当量因子法结合植被指数核算了生态系统服务价值(ESV),揭示了从化区近15年ESV的时空变化特征.结果表明:①林地是从化区最主要的自然生态系统,研究期间林地呈波动增加的趋势,耕地数量逐渐萎缩,建设用地逐渐扩张,增长了约100%;②研究期间从化区ESV先增后降,净增长了3.04亿元,调节服务和支持服务对ESV总量的贡献最大,占比在80%以上;③从化区ESV总体呈现明显的北部高、南部低的空间分异特征,ESV变化主要集中在南部,城市建设是ESV损失的主要原因,而植树造林、耕地转化为园地是ESV增益的主要路径.
Base on GEE platform,we obtained the land-use data every five years from 2005 to 2020,and used the value equivalent factor method combined with vegetation index to calculate the ecosystem service value(ESV),revealing the spatio-temporal variation characteristics of ESV in Conghua District in the past 15 years.The main results are as follows:①during the study period,forest showed a trend of fluctuation and in-crease,cultivated land gradually shrank,and construction land gradually expanded,increasing by about 100%.②From 2005 to 2020,ESV in-creased first and then decreased in Conghua District,with a net increase of 304 million yuan.③ESV generally presented obvious spatial differen-tiation characteristics of high in the north and low in the south.