Impact of land use compactness on the habitat services from green infrastructure in Wuhan,China

As an important carrier of biodiversity, green infrastructure (GI) is significantly affected by changes in urban land use in the process of urbanization. In this study, habitat services from GI were used to represent biodiversity support services, and geographic information system (GIS), remote sensing and statistical analysis were combined to analyze the changes in urban land use compactness and GI habitat services in Wuhan in 2005, 2013 and 2018. Seven indices for land use compactness mainly covering three aspects (land use morphology, land use intensity and land function layout) were selected to explore the correlation and regression relationships between urban land use compactness and habitat services on a grid scale. The results show that: i) The urban land use in Wuhan presents a compact development trend except for the degree of integration; and habitat services decrease along with increasing land use compactness. ii) Relative to land use morphology and land function layout, land use intensity is a more prominent factor affecting habitat services, with construction land density and residential land density always being significant indicators for the habitat pattern. iii) Urban areas with different degrees of land use compactness tend to have different indices that affect the habitat services. Therefore, differential urban development strategies should be formulated based on the regional characteristics of land use compactness levels, so as to coordinate urban compact land use and biodiversity conservation.