Hierarchical filters determine community assembly of urban species pools
Tóm tắt
The majority of humanity now lives in cities or towns, with this proportion expected to continue increasing for the foreseeable future. As novel ecosystems, urban areas offer an ideal opportunity to examine multi‐scalar processes involved in community assembly as well as the role of human activities in modulating environmental drivers of biodiversity. Although ecologists have made great strides in recent decades at documenting ecological relationships in urban areas, much remains unknown, and we still need to identify the major ecological factors, aside from habitat loss, behind the persistence or extinction of species and guilds of species in cities. Given this paucity of knowledge, there is an immediate need to facilitate collaborative, interdisciplinary research on the patterns and drivers of biodiversity in cities at multiple spatial scales. In this review, we introduce a new conceptual framework for understanding the filtering processes that mold diversity of urban floras and faunas. We hypothesize that the following hierarchical series of filters influence species distributions in cities: (1) regional climatic and biogeographical factors; (2) human facilitation; (3) urban form and development history; (4) socioeconomic and cultural factors; and (5) species interactions. In addition to these filters, life history and functional traits of species are important in determining community assembly and act at multiple spatial scales. Using these filters as a conceptual framework can help frame future research needed to elucidate processes of community assembly in urban areas. Understanding how humans influence community structure and processes will aid in the management, design, and planning of our cities to best support biodiversity.
Từ khóa
Tài liệu tham khảo
Cilliers S. S., 2012, Applied urban ecology: a global framework, 123
Kühn I., 2004, The flora of German cities is naturally species rich, Evolutionary Ecology Research, 6, 749
Lubbe C. S., 2010, Political legacy of South Africa affects the plant diversity patterns of urban domestic gardens along a socioeconomic gradient, Scientific Research and Essays, 5, 2900
Martin C. A., 2003, Residential landscaping in Phoenix, Arizona: practices and preferences relative to covenants, codes and restrictions (CC&Rs), Journal of Arboriculture, 29, 9
Martine G.2007.State of the World Population: Unleashing the Potential of Urban Growth. United Nations Population Fund.http://www.unfpa.org/swp/swpmain.htm
Nilon C. H., 2009, Baltimore birdscape study: identifying habitat and land cover variables for an urban bird monitoring project, Urban Habitats, 6
Reid S. T.2011.Ecological and social drivers of tree species diversity and distribution in urban habitats of the central valley of California. MS Thesis.California State University Fresno California USA.
United Nations Environment Programme andUrban Environment Unit.2007.Report of the Cities and Biodiversity: Achieving the 2010 Diversity Target. UNEP/CBD/Cities/1/3.http://www.cbd.int/doc/meetings/biodiv/mayors-01/official/mayors-01-03-en.doc