Research on the Temporal and Spatial Evolution and Driving Factors of Net Primary Productivity of Vegetation in Mountain Cities Based on Geographic Detectors——Taking Chongqing as an Example
In order to explore the temporal and spatial evolution characteristics and main driving conditions of net primary productivity(NPP)of vegetation in Chongqing,using trend analysis,correlation analysis and geographic detector model,this study quantitatively studies the spatiotemporal evolution of vegetation NPP and the driving conditions of influencing factors in Chongqing during 2000-2020,based on the GLASS-NPP data from 2000 to 2020 as the basic data combined with meteorological data,DEM,population density,land use,and NDVI multi-source data,The results show that from 2000 to 2020,the vegetation NPP in Chongqing shows a fluctuating and rising trend over time,and the value of vegetation NPP is between 567.56 and 756.32 g·C/m2/a Spatially,it shows"two highs and one low";the highest value of vegetation NPP in Chongqing is 968.34 g·C/m2/a,and the lowest value is 76.23 g·C/m2/a There is also a significant correlation between vegetation NPP and air temperature and precipitation in Chongqing The mean values of the coefficients are-0.22 and 0.31,respectively The dominant influencing factors for the vegetation NPP in Chongqing are vegetation coverage factor,temperature factor,and altitude factor;the interaction between any two factors is nonlinearly enhanced,indicating that the interaction between multiple factors is a synergistic interaction.
net primary productivity(NPP)of vegetationgeographic detectorsspatiotemporal changesdriversChongqing
NETL
NSTL
万方数据
