The contribution of grassland and watershed are in the third and fourth places, respectively, and the ecological service value of grassland shows a decreasing trend, while that of water area shows an increasing trend.
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Coupling Evaluation and Spatial-Temporal Evolution of Land Ecosystem Services and Economic-Social Development in a City Group: The Case Study of the Chengdu-Chongqing City Group.
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The sentences
The contribution rate of the cultivated land is located in the second place, with an average contribution rate of 26.55%, and the ecological value also shows a decreasing trend.