During 2010–2015, the regions where the risk decreased obviously showed a trend of gradual diffusion from the middle to the four sides, and the regions with rapid decline appeared in western Shandong, central Henan, and southern Qinghai ( Figure 8 d).
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Exploring Spatio-Temporal Variations of Ecological Risk in the Yellow River Ecological Economic Belt Based on an Improved Landscape Index Method.
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The sentences
Water, woodland, and urban land showed an increasing trend, while cropland and grassland showed a decreasing trend.