Karst remote sensing ecological index KRSEI for monitoring ecological quality in Southwest China.

5 ; Table 3 , regions exhibiting an increasing trend in KRSEI accounted for 58.25% of the study area.

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Further analysis reveals that areas showing significant or highly significant improvements in ecological quality are mainly concentrated in Qiannan.

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In contrast, areas with a decreasing trend accounted for 37.34%, with “non-significant decrease” areas comprising 36.75%, mostly concentrated in the central, northwestern, and southeastern regions, including Guiyang, Anshun, and the eastern part of Bijie.

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