Abstract
We examined cytochrome b sequence data to resolve the intraspecific taxonomy of ground parrots Pezoporus wallicus. The species occurs in fragmented coastal heaths in south-eastern and south-western Australia. Net nucleotide divergences among all eastern populations were very low (0.0–0.6%) and genetic diversity unstructured, suggesting relatively recent common ancestry. Gene flow among them was probably maintained via land bridges and the persistence of suitable habitat during the Pleistocene. In contrast, net nucleotide divergence was high (4.4–5.1%) between western and eastern populations, suggesting more ancient divergence about 2 million years ago. The magnitude of divergence between eastern and western lineages is similar to a wide range of avian congeners. Our data support the need to reconsider the intraspecific taxonomy of ground parrots, and we cautiously suggest the recognition of Western Ground Parrots as a species, P. flaviventris, for conservation prioritization, planning and management purposes. Given their recent precipitous decline to approximately 110 individuals, most of which occur at one location, this makes Western Ground Parrots one of the world’s most threatened bird species.
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References
Blom WM (1988) Late quaternary sediments and sea-levels in bass basin, south eastern Australia—a preliminary report. Search 19:94–96
Boessenkool S, Austin JJ, Worthy TH, Scofield RP, Cooper A, Seddon PJ, Water JM (2009) Relict or colonizer? extinction and range expansion of penguins in southern New Zealand. Proc R Soc Lond B Biol 276:815–821
Bradley RD, Baker RJ (2001) A test of the genetic species concept: cytochrome-b sequences and mammals. J Mammal 82:960–973
Bryant SL (1994) Habitat and potential diet of the ground parrot in tasmania. Emu 94:166–171
Burbidge AH, Blyth J (2008) Threatened and rare birds of Western Australia. Department of Environment and Conservation, Perth
Burbidge AH, Blyth J, Danks A, Gillen K, Newbey B (1997) Western Ground Parrot interim recovery plan 1996–1999. Department of Conservation and Land Management, Interim Recovery Plan no. 6, Perth
Clement M, Posada D, Crandall KA (2000) TCS: a computer program to estimate gene genealogies. Mol Ecol 9:1657–1659
Cracraft J (1986) Origin and evolution of continental biotas: speciation and historical congruence within the Australian avifauna. Evolution 40:977–996
DECC (2010) Threatened species. Species, populations and ecological communities. http://www.threatenedspecies.environment.nsw.gov.au/tsprofile/browse_allspecies.aspx?limit=p. Accessed 16 May 2010
DERM (2010) Vulnerable animals. http://www.derm.qld.gov.au/wildlife-ecosystems/wildlife/threatened_plants_and_animals/vulnerable/vulnerable_animals.html. Accessed 16 May 2010
DSE (2007) Advisory list of threatened vertebrate fauna in Victoria. Department of Sustainability and Environment, East Melbourne
Edwards SV, Arctander P, Wilson AC (1991) Mitochondrial resolution of a deep branch in the genealogical tree for perching birds. Proc R Soc Lond B Biol 243:99–107
Forshaw JM, Cooper W (2002) Australian parrots, 3rd edn. Avi-Trader Publishing, Robina
Garnett S, Crowley G (2000) The action plan for Australian birds 2000. Environment Australia, Canberra
Hope GS (1978) The Late Pleistocene and Holocene vegetational history of Hunter Island, north-western Tasmania. Aust J Bot 26:493–514
IUCN (2001) IUCN red list categories and criteria: version 3.1. IUCN, Gland
Johns GC, Avise JC (1998) A comparative summary of genetic distances in the vertebrates from the mitochondrial cytochrome b gene. Mol Biol Evol 15:1481–1490
Joseph L, Omland KE (2009) Phylogeography: its development and impact in Australo-Papuan ornithology with special reference to paraphyly in Australian birds. Emu 109:1–23
Joseph L, Slikas B, Alpers D, Schodde R (2001) Molecular systematics and phylogeography of New Guinean logrunners (Orthonychidae). Emu 101:273–280
Kimura M (1980) A simple method for estimating evolutionary rate of base substitution through comparative studies of nucleotide sequences. J Mol Evol 16:111–120
Klicka J, Zink RM (1997) The importance of recent ice ages in speciation: a failed paradigm. Science 277:1666
Kocher TD, Thomas WK, Meyer A, Edwards SV, Paabo S, Villablanca FX, Wilson AC (1989) Dynamics of mitochondrial DNA evolution in animals: amplification and sequencing with conserved primers. Proc Natl Acad Sci USA 86:6196–6200
Lambeck K, Chappell J (2009) Sea level change through the last glacial cycle. Science 292:679–686
Lovette IJ (2004) Mitochondrial dating and mixed support for the “2% rule” in birds. Auk 121:1–6
Mace GM (2004) The role of taxonomy in species conservation. Phil Trans R Soc B 359:711–719
Murphy SA, Double MC, Legge SM (2007) The phylogeography of palm cockatoos, Probosciger aterrimus, in the dynamic Australo-Papuan region. J Biogeogr 34:1534–1545
Nei M, Miller JC (1990) A simple method for estimating average number of nucleotide substitutions within and between populations from restriction data. Genetics 125:873–879
Norman JA, Christidis L, Joseph L, Slikas B, Alpers D (2002) Unravelling a biogeographical knot: origin of the ‘leapfrog’ distribution pattern of Australo-Papuan sooty owls (Strigiformes) and logrunners (Passeriformes). Proc R Soc Lond B Biol 269:2127–2133
North A (1901–1914) Nests and eggs of birds found breeding in Australia and Tasmania. Special catalogue no. 1, vol 3, part 2. Australian Museum, Sydney
Schodde R, Mason IJ (1997) Aves (Columbidae to Coraciidae). Zoological catalogue of Australia, vol. 37.2. CSIRO Publishing, Melbourne
Tamura K, Dudley J, Nei M, Kumar S (2007) MEGA4: Molecular Evolutionary Genetics Analysis (MEGA) software version 4.0. Mol Biol Evol 24:1596–1599
Acknowledgments
We thank South Coast NRM, Australian National Wildlife Collection Foundation, Australian Wildlife Conservancy, WA Dept. Environment and Conservation, Friends of the Western Ground Parrot and Exetel Pty Ltd. The following individuals played key roles in supporting this work: Abby Berryman, Walter Boles, Steve van Dyck, Stephen Garnett, Karen Gibb, Philippa Horton, Heather Janetzki, Ron Johnstone, Sarah Legge, Robert Palmer and Claire Stevenson. We also thank the Associate Editor and two anonymous referees whose comments improved this manuscript.
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Murphy, S.A., Joseph, L., Burbidge, A.H. et al. A cryptic and critically endangered species revealed by mitochondrial DNA analyses: the Western Ground Parrot. Conserv Genet 12, 595–600 (2011). https://doi.org/10.1007/s10592-010-0161-1
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DOI: https://doi.org/10.1007/s10592-010-0161-1