UCL Discovery
UCL home » Library Services » Electronic resources » UCL Discovery

Bergmann's rule in alien birds

Blackburn, TM; Redding, DW; Dyer, EE; (2019) Bergmann's rule in alien birds. Ecography , 42 (1) pp. 102-110. 10.1111/ecog.03750. Green open access

[thumbnail of Blackburn_Bergmann's Rule in Alien Birds_VoR.pdf]
Preview
Text
Blackburn_Bergmann's Rule in Alien Birds_VoR.pdf

Download (333kB) | Preview

Abstract

Native bird species show latitudinal gradients in body size across species (Bergmann's rule), but whether or not such gradients are recapitulated in the alien distributions of bird species are unknown. Here, we test for the existence of Bergmann's rule in alien bird species worldwide, and investigate the causes of the observed patterns. Published databases were used to obtain the worldwide distributions of established alien bird populations, the locations of alien bird introductions, and bird body masses. Randomisation tests and linear models were used to assess latitudinal patterns in the body masses of introduced and established alien bird populations. Established alien bird species exhibit Bergmann's rule, but this is largely explained by where alien bird species have been introduced: latitudinal variation in the body masses of established alien bird species simply reflects latitudinal variation in the body masses of introduced species. There is some evidence that body mass is implicated in whether or not established species' alien ranges spread towards or contract away from the Equator following establishment. However, most alien bird ranges are encompassed by the latitudinal band(s) to which the species was introduced. Bergmann's rule in alien birds is therefore a consequence of where humans have introduced different species, rather than of natural processes operating after population introduction.

Type: Article
Title: Bergmann's rule in alien birds
Open access status: An open access version is available from UCL Discovery
DOI: 10.1111/ecog.03750
Publisher version: https://doi.org/10.1111/ecog.03750
Language: English
Additional information: © 2018 The Authors. This is an open access article under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0/).
Keywords: biological invasion, body mass, establishment, introduction, latitude, non-native
UCL classification: UCL
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Life Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Life Sciences > Div of Biosciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Life Sciences > Div of Biosciences > Genetics, Evolution and Environment
URI: https://discovery.ucl.ac.uk/id/eprint/10050603
Downloads since deposit
52Downloads
Download activity - last month
Download activity - last 12 months
Downloads by country - last 12 months

Archive Staff Only

View Item View Item