East-west genetic differentiation in Musk Ducks (Biziura lobata) of Australia suggests late Pleistocene divergence at the Nullarbor Plain

P. J. Guay, R. T. Chesser, R. A. Mulder, A. D. Afton, D. C. Paton, Kevin McCracken

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

Musk Ducks (Biziura lobata) are endemic to Australia and occur as two geographically isolated populations separated by the Nullarbor Plain, a vast arid region in southern Australia. We studied genetic variation in Musk Duck populations at coarse (eastern versus western Australia) and fine scales (four sites within eastern Australia). We found significant genetic structure between eastern and western Australia in the mtDNA control region (ΦST = 0. 747), one nuclear intron (ΦST = 0.193) and eight microsatellite loci (FST = 0.035). In contrast, there was little genetic structure between Kangaroo Island and adjacent mainland regions within eastern Australia. One small population of Musk Ducks in Victoria (Lake Wendouree) differed from both Kangaroo Island and the remainder of mainland eastern Australia, possibly due to genetic drift exacerbated by inbreeding and small population size. The observed low pairwise distance between the eastern and western mtDNA lineages (0.36%) suggests that they diverged near the end of the Pleistocene, a period characterised by frequent shifts between wet and arid conditions in central Australia. Our genetic results corroborate the display call divergence and Mathews' (Austral Avian Record 2:83-107, 1914) subspecies classification, and confirm that eastern and western populations of Musk Duck are currently isolated from each other.

Original languageEnglish (US)
Pages (from-to)2105-2120
Number of pages16
JournalConservation Genetics
Volume11
Issue number6
DOIs
StatePublished - Dec 2010
Externally publishedYes

Fingerprint

Ducks
genetic differentiation
ducks
genetic structure
divergence
Pleistocene
genetic variation
genetic drift
isolated population
inbreeding
arid region
subspecies
Macropodidae
population size
Western Australia
Genetic Structures
Mitochondrial DNA
Islands
Population
lake

Keywords

  • Arid zone
  • Microsatellite
  • Mitochondrial DNA
  • Nuclear intron
  • Nullarbor Plain
  • Waterfowl

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Genetics

Cite this

East-west genetic differentiation in Musk Ducks (Biziura lobata) of Australia suggests late Pleistocene divergence at the Nullarbor Plain. / Guay, P. J.; Chesser, R. T.; Mulder, R. A.; Afton, A. D.; Paton, D. C.; McCracken, Kevin.

In: Conservation Genetics, Vol. 11, No. 6, 12.2010, p. 2105-2120.

Research output: Contribution to journalArticle

Guay, P. J. ; Chesser, R. T. ; Mulder, R. A. ; Afton, A. D. ; Paton, D. C. ; McCracken, Kevin. / East-west genetic differentiation in Musk Ducks (Biziura lobata) of Australia suggests late Pleistocene divergence at the Nullarbor Plain. In: Conservation Genetics. 2010 ; Vol. 11, No. 6. pp. 2105-2120.
@article{d36f516bc7584ffd901960f7bf6b0539,
title = "East-west genetic differentiation in Musk Ducks (Biziura lobata) of Australia suggests late Pleistocene divergence at the Nullarbor Plain",
abstract = "Musk Ducks (Biziura lobata) are endemic to Australia and occur as two geographically isolated populations separated by the Nullarbor Plain, a vast arid region in southern Australia. We studied genetic variation in Musk Duck populations at coarse (eastern versus western Australia) and fine scales (four sites within eastern Australia). We found significant genetic structure between eastern and western Australia in the mtDNA control region (ΦST = 0. 747), one nuclear intron (ΦST = 0.193) and eight microsatellite loci (FST = 0.035). In contrast, there was little genetic structure between Kangaroo Island and adjacent mainland regions within eastern Australia. One small population of Musk Ducks in Victoria (Lake Wendouree) differed from both Kangaroo Island and the remainder of mainland eastern Australia, possibly due to genetic drift exacerbated by inbreeding and small population size. The observed low pairwise distance between the eastern and western mtDNA lineages (0.36{\%}) suggests that they diverged near the end of the Pleistocene, a period characterised by frequent shifts between wet and arid conditions in central Australia. Our genetic results corroborate the display call divergence and Mathews' (Austral Avian Record 2:83-107, 1914) subspecies classification, and confirm that eastern and western populations of Musk Duck are currently isolated from each other.",
keywords = "Arid zone, Microsatellite, Mitochondrial DNA, Nuclear intron, Nullarbor Plain, Waterfowl",
author = "Guay, {P. J.} and Chesser, {R. T.} and Mulder, {R. A.} and Afton, {A. D.} and Paton, {D. C.} and Kevin McCracken",
year = "2010",
month = "12",
doi = "10.1007/s10592-010-0097-5",
language = "English (US)",
volume = "11",
pages = "2105--2120",
journal = "Conservation Genetics",
issn = "1566-0621",
publisher = "Springer Netherlands",
number = "6",

}

TY - JOUR

T1 - East-west genetic differentiation in Musk Ducks (Biziura lobata) of Australia suggests late Pleistocene divergence at the Nullarbor Plain

AU - Guay, P. J.

AU - Chesser, R. T.

AU - Mulder, R. A.

AU - Afton, A. D.

AU - Paton, D. C.

AU - McCracken, Kevin

PY - 2010/12

Y1 - 2010/12

N2 - Musk Ducks (Biziura lobata) are endemic to Australia and occur as two geographically isolated populations separated by the Nullarbor Plain, a vast arid region in southern Australia. We studied genetic variation in Musk Duck populations at coarse (eastern versus western Australia) and fine scales (four sites within eastern Australia). We found significant genetic structure between eastern and western Australia in the mtDNA control region (ΦST = 0. 747), one nuclear intron (ΦST = 0.193) and eight microsatellite loci (FST = 0.035). In contrast, there was little genetic structure between Kangaroo Island and adjacent mainland regions within eastern Australia. One small population of Musk Ducks in Victoria (Lake Wendouree) differed from both Kangaroo Island and the remainder of mainland eastern Australia, possibly due to genetic drift exacerbated by inbreeding and small population size. The observed low pairwise distance between the eastern and western mtDNA lineages (0.36%) suggests that they diverged near the end of the Pleistocene, a period characterised by frequent shifts between wet and arid conditions in central Australia. Our genetic results corroborate the display call divergence and Mathews' (Austral Avian Record 2:83-107, 1914) subspecies classification, and confirm that eastern and western populations of Musk Duck are currently isolated from each other.

AB - Musk Ducks (Biziura lobata) are endemic to Australia and occur as two geographically isolated populations separated by the Nullarbor Plain, a vast arid region in southern Australia. We studied genetic variation in Musk Duck populations at coarse (eastern versus western Australia) and fine scales (four sites within eastern Australia). We found significant genetic structure between eastern and western Australia in the mtDNA control region (ΦST = 0. 747), one nuclear intron (ΦST = 0.193) and eight microsatellite loci (FST = 0.035). In contrast, there was little genetic structure between Kangaroo Island and adjacent mainland regions within eastern Australia. One small population of Musk Ducks in Victoria (Lake Wendouree) differed from both Kangaroo Island and the remainder of mainland eastern Australia, possibly due to genetic drift exacerbated by inbreeding and small population size. The observed low pairwise distance between the eastern and western mtDNA lineages (0.36%) suggests that they diverged near the end of the Pleistocene, a period characterised by frequent shifts between wet and arid conditions in central Australia. Our genetic results corroborate the display call divergence and Mathews' (Austral Avian Record 2:83-107, 1914) subspecies classification, and confirm that eastern and western populations of Musk Duck are currently isolated from each other.

KW - Arid zone

KW - Microsatellite

KW - Mitochondrial DNA

KW - Nuclear intron

KW - Nullarbor Plain

KW - Waterfowl

UR - http://www.scopus.com/inward/record.url?scp=78049361626&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=78049361626&partnerID=8YFLogxK

U2 - 10.1007/s10592-010-0097-5

DO - 10.1007/s10592-010-0097-5

M3 - Article

AN - SCOPUS:78049361626

VL - 11

SP - 2105

EP - 2120

JO - Conservation Genetics

JF - Conservation Genetics

SN - 1566-0621

IS - 6

ER -