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[1]LU Jinxin,ZHOU Ronglei,LIU Yangyang,et al.Temporal and Spatial Dynamics of Vegetation Cover on the Loess Plateau and Its Influencing Factors[J].Research of Soil and Water Conservation,2023,30(02):211-219.[doi:10.13869/j.cnki.rswc.2023.02.034]

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Temporal and Spatial Dynamics of Vegetation Cover on the Loess Plateau and Its Influencing Factors

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 30 Number of periods: 2023 02 Page number: 211-219 Column: Public date: 2023-03-10

Title:: Temporal and Spatial Dynamics of Vegetation Cover on the Loess Plateau and Its Influencing Factors

Author(s):: LU Jinxin¹, ZHOU Ronglei¹, LIU Yangyang¹, WEN Zhongming¹, WANG Licheng², GUO Qian¹, YANG Yuting¹, CHEN Sihui¹; (1.College of Grassland Agriculture, Northwest A&F University, Yangling, Shaanxi 712100, China; 2 Institute of Soil and Water Conservation, CAS&MWR, Yangling, Shaanxi712100, China)

Keywords:: vegetation dynamics; driving factors; normalized difference vegetation index; the Loess Plateau

CLC:: Q948; TP79

DOI:: 10.13869/j.cnki.rswc.2023.02.034

Abstract:: MODND1T/NDVI vegetation remote sensing data, contemporaneous meteorological data, and ESA CCI-LC vegetation cover classification data from 2000 to 2015 were used to investigate the spatial and temporal distribution and dynamic changes of vegetation cover on the Loess Plateau and its response mechanism to climate and human activities. The Loess Plateau's NDVI distribution patterns, change trends, and their driving variables were spatialized and studied based on the contributions of climatic and anthropogenic factors to changes in vegetation cover. The results showed that:(1)the NDVI of the Loess Plateau increased from the northwest to the southeast, with clear spatially uneven distribution characteristics; the NDVI during the past 16 years demonstrated a substantial upward trend, with a mean rate of increase of 0.010 2/a and a variation range of 0.54 to 0.71;(2)with a partial correlation coefficient of 0.53, the NDVI trend of Loess Plateau was highly connected with precipitation;(3)the NDVI of the Loess Plateau increased in all seasons, and the NDVI of spring was strongly and positively linked with precipitation, with precipitation being the greatest direct influence in determining the cover changes of all vegetation species in spring;(4)the residual analysis revealed that human activities had a significant effect on the fluctuation of NDVI in the Loess Plateau, which was a key driver of vegetation cover change in the Loess Plateau. In summary, the Loess Plateau's vegetation cover had increased significantly over the last 16 years, and precipitation is the main limiting factor for the Loess Plateau's vegetation growth and development. Through ecological restoration measures such as ‘Grain for Green', human activities have significantly improved the vegetation cover of the Loess Plateau.

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Last Update: 2023-03-10