[Temporal and Spatial Evolution of Ecosystem Health in the Poyang Lake Basin and Responses of Regional Connections]

Analyzing the spatiotemporal evolution characteristics of ecosystem health in Jiangxi Province and revealing the interconnected responses of coupling coordination degrees among urban ecosystems hold significant implications for regional ecological civilization construction and sustainable development. From the perspective of "water-energy-food，" this study integrates the VORS model with a coupling coordination degree model， utilizing multi-source data to analyze the spatiotemporal evolution characteristics of ecosystem health in Jiangxi Province from 2000 to 2020. By constructing a gravity model network， it explores the spatial responses of ecological linkages within the region. The results indicate： ① From the "water-energy-food" perspective， the center of ecosystem health in Poyang Lake Basin shifted to the northern region by 2020， with its average value showing a decline. ② The spatial pattern of VORS coupling coordination degree within the Poyang Lake Basin in 2020 demonstrated superior performance in northern areas compared to that in southern regions， though Nanchang City remained consistently in a state of mild imbalance. ③ Between 2000 and 2020， the ecological connectivity intensity within the basin initially decreased before rising， with an overall increase of 0.02. Central cities exhibited relatively better centrality levels， while Nanchang City maintained moderate centrality despite not being outstanding， and Ganzhou City demonstrated the poorest performance. These findings provide valuable references for coordinating ecosystem health and water-energy-food nexus development in river basins.