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Published on: October 7, 2018
[Spatial-temporal Evolution Characteristics and Driving Mechanisms of Vegetation Ecological Quality in Henan
Ji-Chao Huang1,2,3, Xiao-Ying Deng1,2,3, Fei Meng1,2,3
1Ecological and Environmental Geological Service Center of Henan Provincial Bureau of Geology， Zhengzhou 450053，China.
Abstract:
To reveal the evolutionary patterns of regional ecological quality under human-nature interactions， we analyzed Henan Province （from 2001 to 2023） using MODIS data， Google Earth Engine （GEE）， and a vegetation ecological quality index （EQI）. Integrated with Theil-Sen trends， Mann-Kendall tests， spatial autocorrelation， and optimal parameter Geodetector （OPGD）， the results showed that： ① EQI increased significantly （0.21%·a-1， P < 0.05； mean： 36.67 to 41.34）， with spatial divergence （30.99% western improvement vs. 13.51% eastern degradation） reducing global autocorrelation （Moran's I：0.84 to 0.74）. ② Drivers transitioned from natural dominance （temperature∩elevation， q=0.30， 2001） to human-nature coupling （nighttime light ∩ elevation， q=0.409， 2012）， and finally land use-human synergy （land type ∩ nighttime light， q=0.5045， 2023）. ③ Policy effectiveness was evident in stable periods （CV < 33%， 2013 to 2023）， while eastern high-variability areas （CV > 35%） indicated compounding anthropogenic and natural pressures. This study validates a "natural→human→integrated" driver progression and proposes actionable zoning strategies， with OPGD-based methods offering broader applicability.
