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Spatiotemporal Evolution of Habitat Quality Based on Ecological Red Line - A Case of Shiyan-Shenanongjia

Habitat quality is a reflection of regional biodiversity and ecosystem service value, and plays an important role in the harmonious development of man and nature. However, frequent and large-scale human activities are increasingly threatening the quality of habitats on a global scale. This study uses the Habitat Quality Module of the Integrated Evaluation of Ecosystem Services and Tradeoffs (InVEST) model to evaluate the habitat quality and its spatial characteristics in the Shiyan-Shennongjia region from 2000 to 2020. We further compared and analyzed the effects of ecological red lines on habitat quality in the county-level region. The results show that the habitat degradation degree was less than 0.05, and the overall habitat degradation degree was small. The habitat quality in the study area shows a low-high-low-high spatial pattern from north to south, and low habitat quality was mainly concentrated in the construction land and large arable land areas. In addition, comparing the mean values of the habitat quality in each county excluding the ecological red lines and the regions including the ecological red lines, it was found that the habitat quality in each county decreased significantly after removing the ecological red line area, and the ecological protection red line contributed to the improvement of the overall ecological environment of the county. The results of this study could have theoretical support and policy significance for the maintenance of biodiversity and the protection of the natural environment in the study area.