Regional effects of plant diversity and biotic homogenization in urban greenspace – The case of university campuses across China

《Regional effects of plant diversity and biotic homogenization in urban greenspace – The case of university campuses across China》

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作者: Xin Wang;Jens-Christian Svenning;Jiajia Liu;Zhichun Zhao;Zhaochen Zhang;Gang Feng;Xingfeng Si;Jian Zhang

来源: URBAN FORESTRY & URBAN GREENING,Vol.62,Issue1,Article 127170

语言: 英文

关键字: Anthropogenic driver;Generalized dissimilarity modelling;Non-native species;Species introduction;Species turnover;Urbanization

作者单位: Zhejiang Tiantong Forest Ecosystem National Observation and Research Station, School of Ecological and Environmental Sciences, East China Normal University, Shanghai, 200241, PR China;Section for Ecoinformatics & Biodiversity, Department of Biology, Aarhus University, Ny Munkegade 114, Aarhus C, DK-8000, Denmark;Center for Biodiversity Dynamics in a Changing World (BIOCHANGE), Department of Biology, Aarhus University, Ny Munkegade 114, DK-8000, Aarhus C, Denmark;Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering, School of Life Sciences, Fudan University, Shanghai, 200433, PR China;Ministry of Education Key Laboratory of Ecology and Resource Use of the Mongolian Plateau & Inner Mongolia Key Laboratory of Grassland Ecology, School of Ecology and Environment, Inner Mongolia University, Hohhot, 010021, PR China;Zhejiang Tiantong Forest Ecosystem National Observation and Research Station, School of Ecological and Environmental Sciences, East China Normal University, Shanghai, 200241, PR China;Section for Ecoinformatics & Biodiversity, Department of Biology, Aarhus University, Ny Munkegade 114, Aarhus C, DK-8000, Denmark;Center for Biodiversity Dynamics in a Changing World (BIOCHANGE), Department of Biology, Aarhus University, Ny Munkegade 114, DK-8000, Aarhus C, Denmark;Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering, School of Life Sciences, Fudan University, Shanghai, 200433, PR China;Ministry of Education Key Laboratory of Ecology and Resource Use of the Mongolian Plateau & Inner Mongolia Key Laboratory of Grassland Ecology, School of Ecology and Environment, Inner Mongolia University, Hohhot, 010021, PR China

摘要: The human introduction and spread of species in urban greenspace may lead to an increase in the similarity of plant species composition between distant areas. Univervsity campuses are an important element of greenspace in many cities, but we know little about the extent to which such biotic homogenization of plant species can be detected across different regions and plant growth forms. Here, we collected plant species occurrence data from 253 Chinese university campuses in 130 cities to explore patterns and drivers of plant diversity and biotic homogenizations across different geographical regions and growth forms. We found that native species richness was positively correlated to campus area at the national scale, while non-native species richness was significantly associated with mean annual temperature, precipitation seasonality, campus area and campus age. We found limited support for homogenization caused by non-native plants in most regions. For growth forms, tree species exhibited significant biotic homogenization at the national scale, with weak or no effect for shrubs or herbs. Plant compositional similarity varied among regions, and eastern China always had the highest similarity in species composition with other regions. Combined effects of mean annual temperature and geographic distance overshadowed the roles of other predictors in shaping compositional dissimilarity in most regions. These findings suggest that multi-region settings and plant growth forms should be considered in urban biodiversity management, with special attention towards avoiding homogenization in trees. Increasing native species with local characteristics and considering region-specific environmental and socio-economic conditions are beneficial to mitigate biotic homogenization in urban greenspace.