Construction of avian biodiversity conservation patterns and optimization of ecological corridors in Jiangsu province
The Kunming-Montreal Global Biodiversity Framework heralds a transformative vi-sion for global biodiversity governance extending beyond 2030.In alignment with this frame-work,China has formulated its strategic approach and action plan for biodiversity conservation in the contemporary era.Taking Jiangsu province as a case study,our study explores the meth-odology of constructing avian diversity conservation patterns and optimizing ecological corri-dors at a provincial scale.We employed an integrated ecosystem structure and function evalua-tion method to identify the ecological sources,followed by the utilization of the MaxEnt model to focus on identifying the habitats of 64 species of rare forest birds and water birds within these sources.Based on the landscape resistance surface and least-cost path,we used the kernel analysis method to classify the habitat groups according to patch density.To delineate the spa-tial extent of ecological corridors,we applied the LSCorridors software package to optimize the proposed ecological corridors by identifying stepping-stones,barriers,and pinch points.Our re-sults show that:(1)Ecological source areas showed a tendency to aggregate locally while re-maining regionally isolated.The dominant landscape components included water bodies along with cultivated lands possessing high ecological value.(2)The habitat network for target spe-cies comprised 692 least-cost paths,25 of which extended over 100 km,accounting for 36.72％of the total length,predominantly oriented in an east-west direction.(3)Spatial analysis identi-fied ten distinct habitat groups within the study area,with four concentrated in southern Jiangsu and the others highly isolated.(4)The twelve identified crucial ecological corridors between these groups typically displayed cross-regional characteristics with multiple potential migration routes.For instance,one corridor required optimization at 114 strategic points,including 19 stepping stones,45 barriers,and 50 pinch points.Our study offers valuable insights for the prac-tical implementation of the Convention on Biological Diversity in China.It supports the com-prehensive promotion of mainstreaming biodiversity conservation into ecological protection and restoration planning,serving as a reference for advancing these initiatives.
biodiversity conservationecological corridorstarget specieshabitat distribution patternavian speciesJiangsu province
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