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Genetic and morphological divergence in island and mainland birds: Informing conservation priorities

Dudaniec, Rachael LU ; Schlotfeldt, Beth E.; Bertozzi, Terry; Donnellan, Stephen C. and Kleindorfer, Sonia (2011) In Biological Conservation 144(12). p.2902-2912
Abstract
Evolutionary processes can complicate conservation efforts for species with uncertain taxonomic classifications and discrete geographic populations. Discordant morphological and genetic patterns across the geographic range of species further calls for the identification of evolutionary significant units for conservation. Using island and mainland populations of a small Australian passerine (the superb fairy-wren, Malurus cyaneus), we examine the relationship between morphological and genetic divergence among two subspecies, M. c. ashbyi (Kangaroo Island, South Australia) and M. c. leggei (South Australia, mainland), using eight microsatellite markers. Island birds showed clear evidence for morphological divergence, with a larger body size... (More)
Evolutionary processes can complicate conservation efforts for species with uncertain taxonomic classifications and discrete geographic populations. Discordant morphological and genetic patterns across the geographic range of species further calls for the identification of evolutionary significant units for conservation. Using island and mainland populations of a small Australian passerine (the superb fairy-wren, Malurus cyaneus), we examine the relationship between morphological and genetic divergence among two subspecies, M. c. ashbyi (Kangaroo Island, South Australia) and M. c. leggei (South Australia, mainland), using eight microsatellite markers. Island birds showed clear evidence for morphological divergence, with a larger body size and thinner bill compared to mainland birds. Two genetic clusters were found using Bayesian methods, comprising mainland and island regions. Estimates of recent migration rates between all sites were very low (<2%). Morphological and genetic differentiation between island and mainland sites correlated significantly, but not when controlling for isolation by distance. Genetic and morphological substructure was evident with three distinct genetic clusters in each region. Males, the highly sedentary sex, appeared to drive correlations between morphological and genetic differentiation. Our study provides evidence that the subspecies classification of M. cyaneus in island and mainland regions encapsulates two independently diverging populations that can be recognised in conservation planning. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Genetic divergence, Morphological divergence, Evolutionary lineage, Superb fairy-wren, Sex-biased dispersal, Island, Mainland
in
Biological Conservation
volume
144
issue
12
pages
2902 - 2912
publisher
Elsevier
external identifiers
  • scopus:83555164796
ISSN
1873-2917
DOI
10.1016/j.biocon.2011.08.007
language
English
LU publication?
yes
id
fea26602-acce-435e-95a1-e6fb9fb19b04 (old id 3738454)
alternative location
http://www.sciencedirect.com/science/article/pii/S0006320711003156
date added to LUP
2013-05-23 14:19:45
date last changed
2017-03-12 03:19:00
@article{fea26602-acce-435e-95a1-e6fb9fb19b04,
  abstract     = {Evolutionary processes can complicate conservation efforts for species with uncertain taxonomic classifications and discrete geographic populations. Discordant morphological and genetic patterns across the geographic range of species further calls for the identification of evolutionary significant units for conservation. Using island and mainland populations of a small Australian passerine (the superb fairy-wren, Malurus cyaneus), we examine the relationship between morphological and genetic divergence among two subspecies, M. c. ashbyi (Kangaroo Island, South Australia) and M. c. leggei (South Australia, mainland), using eight microsatellite markers. Island birds showed clear evidence for morphological divergence, with a larger body size and thinner bill compared to mainland birds. Two genetic clusters were found using Bayesian methods, comprising mainland and island regions. Estimates of recent migration rates between all sites were very low (&lt;2%). Morphological and genetic differentiation between island and mainland sites correlated significantly, but not when controlling for isolation by distance. Genetic and morphological substructure was evident with three distinct genetic clusters in each region. Males, the highly sedentary sex, appeared to drive correlations between morphological and genetic differentiation. Our study provides evidence that the subspecies classification of M. cyaneus in island and mainland regions encapsulates two independently diverging populations that can be recognised in conservation planning.},
  author       = {Dudaniec, Rachael and Schlotfeldt, Beth E. and Bertozzi, Terry and Donnellan, Stephen C. and Kleindorfer, Sonia},
  issn         = {1873-2917},
  keyword      = {Genetic divergence,Morphological divergence,Evolutionary lineage,Superb fairy-wren,Sex-biased dispersal,Island,Mainland},
  language     = {eng},
  number       = {12},
  pages        = {2902--2912},
  publisher    = {Elsevier},
  series       = {Biological Conservation},
  title        = {Genetic and morphological divergence in island and mainland birds: Informing conservation priorities},
  url          = {http://dx.doi.org/10.1016/j.biocon.2011.08.007},
  volume       = {144},
  year         = {2011},
}