珠三角城市群地表热环境与生态系统服务价值解耦的时空特征  

Spatiotemporal charactersitics of decoupling between land surface thermal environment and ecosystem ser-vice value in Pearl River Delta Urban Agglomeration,China

作　　者：黄卓男 陈颖彪[1,2] 吴志峰 HUANG Zhuo-nan;CHEN Ying-biao;WU Zhi-feng(School of Geographical Science and Remote Sensing,Guangzhou University,Guangzhou 510006 China;Guangdong Provincial Geographical Condition Monitoring and Comprehensive Analysis Engineering Techno-logy Research Center,Guangzhou 510006 China)

机构地区：[1]广州大学地理科学与遥感学院,广州510006 [2]广东省地理国情监测与综合分析工程技术研究中心,广州510006

出　　处：《应用生态学报》2022年第7期1993-2000,共8页Chinese Journal of Applied Ecology

基　　金：教育部人文社科规划基金项目(21YJAZH009);国家重点研发计划项目(2018YFB2100703)资助。

摘　　要：珠三角城市群是我国城市化高度发展的区域,城市化气候效应尤其是热岛效应对城市生态系统及其生境产生重大影响。本研究基于2000、2005、2010、2015和2019年MODIS地表温度(LST)数据和土地覆被数据,定量测度地表热环境和生态系统服务价值(ESV),并借助解耦分析模型,分析珠三角城市群2000—2019年LST与ESV之间的解耦状态,揭示两者之间的权衡关系,进而对城市群内部LST与ESV之间协同状态的时空分异进行分析。结果表明:2000—2019年,珠三角城市群地表热环境空间格局时序变化相对稳定,但呈现出核心区高位波动、外围区低位波动的空间分异;珠三角城市群ESV呈现空间分布稳定而时间序列下降的趋势,城市群区域内9座城市ESV降幅均超过9%;珠三角城市群地表热环境与总体ESV,以及与供给、调节、支持服务价值之间呈现的解耦状态以弱负解耦和强负解耦为主,显示出较为明显的权衡关系,表明珠三角城市群生态系统仍然受到城市化环境特征的显著影响,解耦状态的时空分异与城市化水平在城市群内部的空间分异有关。珠三角城市群未来生态政策的制定须考虑城市群内部城市化水平差异以及城市化环境特征与生态系统之间的权衡状态的分异,精准制定生态管控和修复方案,提高生态规划效率和实施效果。The Pearl River Delta Urban Agglomeration(PRDUA)is a highly urbanized region in China.The urbanized climate,especially the heat island effect,has a significant impact on urban ecosystems and habitats.Based on MODIS land surface temperature(LST)data and land cover data in 2000,2005,2010,2015,and 2019,we quantified the land surface thermal environment and ecosystem service value(ESV),analyzed the decoupling between LST and ESV in the PRDUA from 2000 to 2019 using the decoupling analysis model,revealed the trade-off between them,and analyzed the spatiotemporal variation of the synergistic state between LST and ESV in PRDUA.The results showed that,from 2000 to 2019,the spatial pattern of land surface thermal environment in the PRDUA was relatively stable in time series but showed spatial variation with high fluctuation in the core area and low fluctuation in the peripheral area.The ESV of the PRDUA showed a trend of stable spatial distribution and decreasing in time series.The ESV of all the nine cities in PRDUA decreased by more than 9%.The decoupling between land surface thermal environment and the overall ESV of the PRDUA,as well as with the values of provisioning,regulating and support services,was dominated by weak negative decoupling and strong negative decoupling,showing a more significant trade-off,which indicated that the ecosystems of the PRDUA were still significantly influenced by the environmental characteristics of urbanization,and that the spatiotemporal variation of the decoupling states was related to the spatial variation of urbanization levels in PRDUA.The formulation of future ecological policies in the PRDUA must consider the differences in urbanization levels and the differences in the trade-offs between urbanized environments and ecosystems to precisely formulate ecological control and restoration plans and improve the efficiency and implementation effects of ecological planning.

关 键 词：地表热环境 生态系统服务价值 解耦状态 解耦分析模型 珠三角城市群 

分 类 号：X171.1[环境科学与工程—环境科学] X16