The response of ecological security to land use change in east and west
subtropical China
Abstract
Regional land use change and ecological security have received
considerable attention in recent years. The rapid economic development
of Kunming and Fuzhou has resulted in environmental damage. It is
important to conduct a comparative analysis of the ecological security
response to land use/land cover change (LUCC) in different natural
zones. With the support of Google Earth Engine (GEE) platform, the
random forest and support vector machine methods were used to classify
land cover types in the study area, then the ArcGIS platform was used to
analyze LUCC. The driving force-pressure-state-impact-response (DPSIR)
model and entropy weight method was used to construct an ecological
security evaluation system, and gray correlation was used to compare the
ecological security responses to LUCC in Kunming and Fuzhou. The
findings revealed that: (1) The average dynamic degrees of comprehensive
land use in Kunming and Fuzhou from 1995 to 2020 were 1.05% and 0.55%,
respectively; (2) From 1995 to 2020, the ecological security index
values for Kunming and Fuzhou increased from 0.42 to 0.52 and from 0.36
to 0.68, respectively, indicating that Fuzhou’s index is rising more
quickly; and (3) The response of ecological security to LUCC varies
across regions; increases in the woodland area had a positive effect on
the ecological security of Kunming and Fuzhou, whereas the expansion of
construction land significantly impeded the improvement of ecological
security in Fuzhou, and the status of water resources had a significant
impact on the ecological security of Kunming.