Fang Tang, Zhongfa Zhou, Yangbing Li, Yating Jing
The policy of ex situ poverty alleviation and relocation (PAR) effectively achieves socioecological sustainable development goals. However, crossregional socioecological system (SES) interactions and their spatial heterogeneity remain insufficiently explored, potentially constraining constrain the efficacy of subsequent support policies for migrant relocation. Based on the continuous monitoring data, this study constructs an evaluation index system of social adaptability (SA) using four dimensions, namely, economy, livelihood, psychology and development ability. This study applied the methods of ecosystem health (EH) index, coupling coordination degree, and generalized additive model and introduced the telecoupling theory of SES to construct an analysis framework connecting the EH of the migrant outflow sites (MOS) and the SA of the migrant inflow sites (MIS). Results revealed that the SA improved significantly from 2019 to 2022, increaseing by 7.22 % and 15.93 % in 2021 and 2022, respectively. The EH decreased initially and then increased suddenly before stabilizing. Moreover, 18.75 % of the emigration counties continued to increase spatially. Microanalysis revealed the contribution process of PAR to EH. The telecoupling of SA and EH demonstrated a synergistic developmental trend, and spatial distance was found to affect this relationship through complex nonlinear characteristics. Our research deliver insights facilitating the consolidating of the outcomes of ex situ PAR and provide practical support for efforts to reduce global poverty reduction and ensure the coordinated development of cross-regional SES.