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Range size-abundance relationships in Australian passerines

Symonds, Matthew R. E. and Johnson, Christopher N. 2006, Range size-abundance relationships in Australian passerines, Global ecology and biogeography, vol. 15, no. 2, pp. 143-152, doi: 10.1111/j.1466-822x.2005.00198.x.

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Title Range size-abundance relationships in Australian passerines
Author(s) Symonds, Matthew R. E.ORCID iD for Symonds, Matthew R. E.
Johnson, Christopher N.
Journal name Global ecology and biogeography
Volume number 15
Issue number 2
Start page 143
End page 152
Total pages 10
Publisher Wiley - Blackwell Publishing
Place of publication Oxford , Eng.
Publication date 2006-03
ISSN 1466-822X
Keyword(s) Abundance,
population density
range size
null model
Summary Aim  To investigate the relationship between geographical range size and abundance (population density) in Australian passerines.
Location  Australia (including Tasmania).
Methods   We analysed the relationship between range size and local abundance for 272 species of Australian passerines, across the whole order and within families. We measured abundance as mean and maximum abundance, and used a phylogenetic generalized least-squares regression method within a maximum-likelihood framework to control for effects of phylogeny. We also analysed the relationship within seven different habitat types.
Results  There was no correlation between range size and abundance for the whole set of species across all habitats. Analyses within families revealed some strong correlations but showed no consistent pattern. Likewise we found little evidence for any relationship or conflicting patterns in different habitats, except that woodland/forest habitat species exhibit a negative correlation between mean abundance and range size, whilst species in urban habitats exhibit a significant positive relationship between maximum abundance and range size. Despite the general lack of correlation, the raw data plots of range size and abundance in this study occupied a triangular space, with narrowly distributed species exhibiting a greater variation in abundances than widely distributed species. However, using a null model analysis, we demonstrate that this was due to a statistical artefact generated by the frequency distributions for the individual variables.
Conclusions   We find no evidence for a positive range size-abundance relationship among Australian passerines. This absence of a relationship cannot be explained by any conflicting effects introduced by comparing across different habitats, nor is it explained by the fact that large proportions of Australia are arid. We speculate that the considerable isolation and evolutionary age of Australian passerines may be an explanatory factor.
Language eng
DOI 10.1111/j.1466-822x.2005.00198.x
Field of Research 060207 Population Ecology
060309 Phylogeny and Comparative Analysis
060809 Vertebrate Biology
Socio Economic Objective 970106 Expanding Knowledge in the Biological Sciences
HERDC Research category C1.1 Refereed article in a scholarly journal
Copyright notice ©2006, Blackwell Publishing
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