Global analysis for recognizing the relationships between urban biodiversity and urban landscape patterns.

Authors: Chun-Wei Huang*, National Taiwan University, Department of Geography, Hui-Xian Lau, National Taiwan University, Department of Geography
Topics: Biogeography, Land Use and Land Cover Change, Urban and Regional Planning
Keywords: Urban biodiversity, Urban form, Landscape ecology, Cities
Session Type: Paper
Day: 4/3/2019
Start / End Time: 12:40 PM / 2:20 PM
Room: Washington 2, Marriott, Exhibition Level
Presentation File: No File Uploaded

Global urbanization has expensively led to habitat loss. If current trends of global urbanization continue, how to design eco-friendly urban landscapes becomes a crucial issue to mitigate urban threats to biodiversity. Even though previous studies have completed global analyses for identifying anthropogenic factors that shape urban biodiversity, most of cities analyzed in the studies are located in Europe and North America. Interaction between urbanization and biodiversity in other geographic realms is still insufficiently recognized. This study statistically analyzes the correlation between vertebrate richness with climate, topography, geography and landscape structures for 512 cities, which have more than one million inhabitants in 2016 based on the world population prospects from UN. We identify vertebrate richness, including mammals, avians and amphibians within administrative boundaries of the cities (i.e. city proper) from the global biodiversity maps provided by Jenkins et al., (2013). Then, we quantify landscape structures based on landscape metrics, including patch number, patch size and patch connectivity of urban green spaces, using patch analyst. The results show that number and size of urban green spaces (e.g. urban forest and grassland) are correlated to richness of territorial vertebrates. We overview how land cover and landscape configuration are relevant to urban biodiversity for the cities in different biogeographic realms. As such, our analysis provides hints to understand not only how much area but also what kinds of landscape structures are needed for maintaining high urban biodiversity.

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