ZHANG Mingxiang1, GU Xiaoping1, 2, LIAO Liufeng1, TIAN Pengju1

(1. Guizhou Ecological Meteorology and Satellite Remote Sensing Center, Guiyang 550002, China; Guizhou Key Laboratory of Mountainous Climate and Resources, Guiyang 550002,China)

Abstract：Based on Moderate-resolution Imaging Spectroradiometer(MODIS)/ Normalized Difference Vegetation Index(NDVI) data and surface temperature and precipitation observations at 84 meteorological stations in Guizhou, this study researched the effects of climate change and human activities on vegetation coverage change in rocky desertification area by using trend analysis, partial correlation analysis and residual analysis. The results showed that the vegetation cover in rocky desertification area showed a fluctuant increasing trend from 2000 to 2021, with a change trend of 0.76/a. Except for southwestern Liupanshui, northern Anshun and southern Guiyang, the FVC variation trend in most of rocky desertification area showed a significant increase. The partial correlation coefficients of FVC with precipitation and temperature were mainly positive, 28.13% and 60.65% areas featured with significant positive correlation with precipitation and temperature, respectively. Vegetation change in rocky desertification area was the result of the joint action of climate change and human activities. The contribution of climate factors to FVC change was 18.59%, and the contribution of human activities was 81.41%. Human activities were the dominant factor of vegetation change in rocky desertification area, which played the leading role (up to 97.57%) for the area of vegetation restoration. The comprehensive control project of rocky desertification has obviously promoted the improvement of vegetation in recent years. This study was helpful to further understand the driving factors of vegetation change in Guizhou rocky desertification area, and provide a scientific basis for ecological environment protection.

Key words：climate change; human activities; vegetation coverage; rocky desertification

EARTH AND ENVIRONMENT Vol.51, No.1, Tot No.351, 2023, Page 76