Homogenization of plant diversity, composition, and structure in North American urban yards:

Journal Article (Journal Article)

Urban ecosystems are widely hypothesized to be more ecologically homogeneous than natural ecosystems. We argue that urban plant communities assemble from a complex mix of horticultural and regional species pools, and evaluate the homogenization hypothesis by comparing cultivated and spontaneously occurring urban vegetation to natural area vegetation across seven major U.S. cities. There was limited support for homogenization of urban diversity, as the cultivated and spontaneous yard flora had greater numbers of species than natural areas, and cultivated phylogenetic diversity was also greater. However, urban yards showed evidence of homogenization of composition and structure. Yards were compositionally more similar across regions than were natural areas, and tree density was less variable in yards than in comparable natural areas. This homogenization of biodiversity likely reflects similar horticultural source pools, homeowner preferences, and management practices across U.S. cities.

Full Text

Duke Authors

Cited Authors

  • Pearse, WD; Cavender-Bares, J; Hobbie, SE; Avolio, ML; Bettez, N; Roy Chowdhury, R; Darling, LE; Groffman, PM; Grove, JM; Hall, SJ; Heffernan, JB; Learned, J; Neill, C; Nelson, KC; Pataki, DE; Ruddell, BL; Steele, MK; Trammell, TLE

Published Date

  • February 1, 2018

Published In

Volume / Issue

  • 9 / 2

Electronic International Standard Serial Number (EISSN)

  • 2150-8925

Digital Object Identifier (DOI)

  • 10.1002/ecs2.2105

Citation Source

  • Scopus