Changes of Wetland Landscape Pattern and Its Driving Forces in the Central Urban Area of Chongqing from 2010 to 2020
Urban wetland is of great significance to human survival and development.This paper took the wetland in the central ur-ban area of Chongqing as the research object.Based on the classification data of land use types in 2010,2015 and 2020,the land-scape pattern index was calculated by FRAGSTATS software,and the transfer matrix of wetland utilization was constructed and ana-lyzed.The equivalent factor method was used to calculate and evaluate the value of ecosystem services,and its internal driving force was analyzed.The results show that:(1)From 2010 to 2015,the wetland landscape pattern showed the relief of landscape fragmentation,the increase of connectivity,the decrease of boundary complexity,the regularization of edge,the weakening of fractal characteristics and the decrease of spatial heterogeneity.From 2015 to 2020,it showed the opposite trend.(2)During the study pe-riod,the area of paddy field and mudflat decreased,while the area of river channel,lake,reservoir and pond increased;the conver-sion of paddy field into construction land was the dominant way of land use change.(3)The total value of wetland ecosystem servic-es showed an upward trend,and the increase rate from 2010 to 2015 was about 9 times than that from 2015 to 2020.(4)Urban de-velopment and policy factors are the two main driving factors for the evolution of wetland landscape pattern and its associated eco-logical services value.
urban wetlandlandscape patternland useequivalent factorcentral urban area of Chongqing
万方数据
