Response of vegetation variation to climate change and human activities in semi-arid swamps.

The results of θ NDVI and Mann–Kendall significance test were combined to obtain six scenarios of vegetation NDVI: when θ NDVI > 0 and passed α =0.05 significance test, vegetation NDVI showed a significant increasing trend; when α =0.05 significance test was not passed, vegetation NDVI showed a non-significant increasing trend; similarly, vegetation NDVI showed a decreasing trend.

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The vegetation cover showed a trend of degradation and then recovery, in which the percentage of high vegetation cover area decreased from 51.22% (1984–2000) to 28.33% (2001–2005), and then recovered to 55.69% (2006–2020).

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