黄河流域生态旅游发展时空异质性与组态提升路径

赵巧艳, 周霖, 任敏敏

Spatiotemporal heterogeneity and configurational enhancement pathways of ecological tourism development in the Yellow River Basin

Qiaoyan Zhao, Lin Zhou, Minmin Ren

图5 黄河流域整体与上中下游生态旅游发展核密度图

Fig.5 Kernel density plots of ecological tourism development in the Yellow River Basin overall and its upper， middle， and lower reaches