黄土丘陵沟壑区村域生态系统服务簇的时空分异及其地形梯度分析
刘迪, 陈海, 荔童, 张行, 耿雨

Spatiotemporal differentiation of village ecosystem service bundles in the loess hilly and gully region and terrain gradient analysis
LIU Di, CHEN Hai, LI Tong, ZHANG Hang, GENG Yu
图3 生态系统服务簇数目的确定
Fig.3 Determination of the number of ecosystem service bundles