Evaluation of the cultivated land ecosystem stability based on multi-source remote sensing data—A case study of Fenhe River Basin
This study was initiated from the perspective of exogenous stresses on cultivated land in the Fenhe River Basin.Multiple remote sensing data sources were utilized to obtain monitoring indicators such as soil erosion,desertification,salinization,pollution,remote sensing ecological index,and vegetation productivity.A dynamic stability evaluation model within the framework of stress-resistance-response was constructed,analyzing the spatiotemporal evolution characteristics of cultivated land ecosystem stability.Cultivated land was partitioned using two-dimensional graph theory clustering,and corresponding control measures were proposed.The results show that:(1)From 2011 to 2021,certain counties in the Jinzhong Basin and its northeast experienced a significant exacerbation of soil pollution and salinization.The exogenous stress values increased slightly in these areas,while in other regions,a decrease in exogenous stress values predominated,accounting for 91.66％of the total farmland area.Resistance values exhibited a noticeable increase,with 98.69％of cultivated land experiencing an upward trend.Spatially,a basic pattern emerged,with the Jinzhong Basin and Linfen Basin forming dual core growth areas.83.13％of cultivated land experienced an increase in response values,while declining areas were concentrated in the Jinzhong Basin and its northeast.(2)The cultivated land ecosystem stability increased markedly,with 99.06％of cultivated land experiencing an enhancement.Stability in the Jinzhong Basin showed a slight increase,whereas downstream areas such as the Linfen Basin and river valleys exhibited a significant increase.The disparity in stability between regions gradually diminished,primarily due to improvements in the ecological environment quality.(3)Based on stability and its intrinsic indicators,the study area was divided into the Loess Hilly Area-core governance zone,Jinzhong Basin-urban agricultural zone,Linghuo Mountain Gorge-ecological safeguard zone,Linfen Basin-conservation buffer zone,and River Valley Plain-stable and productive zone.Differential cultivated land protection and management measures were proposed accordingly.The research findings can provide a scientific basis for enhancing the stability of the cultivated land ecosystem.
exogenous stresscultivated landecosystem stabilityspatial-temporal evolutionFenhe River Basin
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