title: A global synthesis of plant extinction rates in urban areas.
abstract: Plant extinctions from urban areas are a growing threat to biodiversity worldwide. To minimize this threat, it is critical to understand what factors are influencing plant extinction rates. We compiled plant extinction rate data for 22 cities around the world. Two-thirds of the variation in plant extinction rates was explained by a combination of the city's historical development and the current proportion of native vegetation, with the former explaining the greatest variability. As a single variable, the amount of native vegetation remaining also influenced extinction rates, particularly in cities > 200 years old. Our study demonstrates that the legacies of landscape transformations by agrarian and urban development last for hundreds of years, and modern cities potentially carry a large extinction debt. This finding highlights the importance of preserving native vegetation in urban areas and the need for mitigation to minimize potential plant extinctions in the future.
authors.affiliation: Australian Research Centre for Urban Ecology, Royal Botanic Gardens Melbourne, South Yarra, Vic 3141, Australia. hahsa@unimelb.edu.au
authors.forename: Amy K
authors.initials: AK
authors.lastname: Hahs
authors.forename: Mark J
authors.initials: MJ
authors.lastname: McDonnell
authors.forename: Michael A
authors.initials: MA
authors.lastname: McCarthy
authors.forename: Peter A
authors.initials: PA
authors.lastname: Vesk
authors.forename: Richard T
authors.initials: RT
authors.lastname: Corlett
authors.forename: Briony A
authors.initials: BA
authors.lastname: Norton
authors.forename: Steven E
authors.initials: SE
authors.lastname: Clemants
authors.forename: Richard P
authors.initials: RP
authors.lastname: Duncan
authors.forename: Ken
authors.initials: K
authors.lastname: Thompson
authors.forename: Mark W
authors.initials: MW
authors.lastname: Schwartz
authors.forename: Nicholas S G
authors.initials: NS
authors.lastname: Williams
mesh_terms: D044822:Biodiversity; D002947:Cities; D003247:Conservation of Natural Resources; D053476:Extinction, Biological; D010944:Plants; D011157:Population Dynamics