Construction of ecological safety pattern in mineral resource-based cities by coupling value and risk assessment:taking Ma'anshan City as an example
The comprehensive effect of multi-source factors has changed the landscape structure of resource-based cities,resulting in fragile ecological environment and threatening ecological security.Landscape ecological risk and ecosystem service value are two complementary dimensions to measure regional ecological security and important factors to construct ecological security pattern.Based on the three-period land use data of Ma'anshan City,this study analyzes the spatial and temporal changes of ecosystem service value and landscape ecological risk in 20 years through the value equivalent method and landscape pattern index.At the same time,considering the impact of landscape ecological risk on species migration,a multi-dimensional resistance surface of nature-society-landscape is constructed.Based on the evaluation results of ecosystem service value,MSPA(morphological spatial pattern analysis)and circuit theory are combined to identify ecological sources,corridors and ecological nodes.The results show that:1)the medium risk area is the most important type of risk area,and it is distributed in the plain area where various landscape types are intertwined,and its area shows an expanding trend(a total increase of 250.31 km2);2)the lower and middle value areas are the most important ecosystem service value classes,which are distributed in areas where cultivated land and construction land are intertwined,as well as mountainous and hilly areas with dense forest land,and the area shows a continuous downward trend(a total decrease of 221.20 km2);3)Ma'anshan City has a total of 10 ecological sources,5 important ecological corridors,11 general ecological corridors,22 ecological pinch points,and 28 ecological obstacle points;4)it has constructed an ecological security pattern of"One Belt and Three Districts".
coal resource citieslandscape ecological riskcircuit theoryecological security patternecosystem service value
万方数据
维普
