Construction and Optimization of Ecological Security Pattern for Waterbirds in Tianjin Wetland based on Habitat Suitability
Tianjin,as a crucial wetland area in the Bohai Bay region and a sensitive zone under the dual pressures of land-sea interaction,faces significant ecological security challenges exacerbated by global climate change and human development activities,including the degradation of wetland ecosystem services,disruption of ecological network patterns,and the shrinking of safe habitats for waterbirds.This study focus on wetland waterbirds in Tianjin,adopts a"species-habitat-restoration"perspective to identify ecological source areas based on habitat suitability.By using habitat suitability evaluation results,the initial resistance surface is modified.And ecological corridors were extracted using the least-cost resistance model to construct the ecological security pattern for waterbirds in the wetlands of Tianjin City.The results indicate that the total area of waterbird ecological source in Tianjin's wetland is 2 695.06 km2,accounting for 21.05%of the city's total area,mainly distributed in Binhai New Area,Baodi District,Jizhou District,Ninghe District and Jinghai District.A total of 120 key ecological corridors,with a spoon-shaped distribution,are mainly located along the source areas and river systems,ensuring the connectivity between the waterbirds habitats in Tianjin City.A comprehensive plan for the identified source areas and ecological corridors is proposed,including strategies for constructing ecological corridors for waterbird activities,establishing waterbird activity protection hotspots,and designating of key protected plots for waterbird activities.Macroscopically,this forms a wetland waterbird ecological security pattern of"two screens,three corridors,six areas and multiple points".The approach of identifing source areas based on habitat suitability and modifying the basic resistance surface through habitat suitability results comprehensively considers the significance of ecological processes in the construction of the wetland waterbird ecological security pattern.This study provides a practical pathway and scientific guidance for solving the problem of wetland waterbird ecological security in Tianjin City.
ecological security patternhabitat suitabilityminimum cumulative resistance modelwaterbirdTianjin City
NETL
NSTL
万方数据
