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[1]XU Yong,HUANG Wenting,LU Mengyuan,et al.Vegetation Cover Change and the Relative Role of Climate Change and Human Activities in Southwest Karst Areas[J].Research of Soil and Water Conservation,2022,29(03):292-299.

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Vegetation Cover Change and the Relative Role of Climate Change and Human Activities in Southwest Karst Areas

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 29 Number of periods: 2022 03 Page number: 292-299 Column: Public date: 2022-04-20

Title:: Vegetation Cover Change and the Relative Role of Climate Change and Human Activities in Southwest Karst Areas

Author(s):: XU Yong^1,2, HUANG Wenting², LU Mengyuan², OU Yuxian², ZHANG Zhanyi², LI Mingjie², GUO Zhendong², MA Ruixue²; (1.Guangxi Key Laboratory of Spatial Information and Geomatics, Guilin University of Technology, Guilin, Guangxi 541006, China; 2.College of Geomatics and Geoinformation, Guilin University of Technology, Guilin, Guangxi 541006, China)

Keywords:: southwest karst areas; NDVI; climate change; human activities; relative role

CLC:: Q948

DOI:: -

Abstract:: Studying on vegetation cover change and the relative role of climate change and human activities can provide a better understanding for spatiotemporal vegetation variation and the driving mechanism of climate change and human activities to vegetation variation in southwest karst areas, China. Based on the moderate resolution imaging spectroradiometer(MODIS)normalized difference vegetation index(NDVI)time series, digital elevation model data(DEM), in situ climate data using Theil-Sen Median analysis, Mann-Kendall significance test, relative analysis, and so on, we analyzed the relative role of climate change and human activities on vegetation variation, explored the correlation coefficients between NDVI and climate variables in southwest karst areas, China from 2001 to 2019. The results showed that from 2001 to 2019, the vegetation cover presented an upward trend in southwest karst areas. The spatial pattern of vegetation variation exhibited obvious spatial heterogeneity and the areas with vegetation improvement were greater than the areas with vegetation degradation. Furthermore, the relative role of human activities on vegetation improvement and vegetation degradation was higher than the relative role of climate change on vegetation variation. The vegetation cover was positively and most significantly associated with precipitation, followed by temperature and relative humidity but negatively associated with sunshine duration in southwest karst areas from 2001 to 2019. These results indicated that both the vegetation improvement and vegetation degradation were dominated by human activities, and the correlation coefficient between NDVI and climate variables exhibited significant regional differences in southwest karst areas in the study period.

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Last Update: 2022-04-20