EXPLORING THE DRIVING MECHANISMS OF REGIONAL VEGETATION COVER CHANGE USING A COMBINATION OF FACTOR REGRESSION AND FACTOR INTERACTION IN THE LIAOHE RIVER BASIN, CHINA.

Comprehending the underlying mechanisms governing the dynamics of vegetation alteration constitutes a fundamental prerequisite for the effective implementation of ecological construction. In this study, the spatial heterogeneity of vegetation coverage in the Liaohe River Basin (LHRB) in China from 2000 to 2019 was analyzed using the Normalized Difference Vegetation Index (NDVI) derived from MOD13Q1 product. It proposed to combine factor regression and factor interaction to jointly explore the effects of factors on the NDVI. The results showed that: (1) The NDVI in the LHRB showed an overall increasing trend from 2000 to 2019; (2) Precipitation emerged as the predominant factor exerting influence on vegetation change across the basin, and the change trend of NDVI was synchronized with precipitation; (3) The interactions between two environmental factors had a greater influence on NDVI than any single factor. The interactions of natural factors played a dominant role; (4) The gradient changes in precipitation affected the explanatory power of other factors for NDVI. With the increase of precipitation, the activity of other factors kept getting stronger, and the fit of other factors to NDVI improved; (5) The human activities have generally been dominated by positive effects in the LHRB over the past 20 years. [ABSTRACT FROM AUTHOR]