Subterranean archipelago in the Australian arid zone: mitochondrial DNA phylogeography of amphipods from central Western Australia

Simple item page
dc.contributor.authorCooper, S.
dc.contributor.authorBradbury, J.
dc.contributor.authorSaint, K.
dc.contributor.authorLeijs, R.
dc.contributor.authorAustin, A.
dc.contributor.authorHumphreys, W.
dc.date.issued2007
dc.descriptionThe definitive version is available at www.blackwell-synergy.com
dc.description.abstractIn 1998, a unique subterranean ecosystem was discovered in numerous isolated calcrete (carbonate) aquifers in the arid Yilgarn region of Western Australia. Previous morphological and genetic analyses of a subterranean water beetle fauna suggest that calcrete aquifers are equivalent to closed island habitats that have been isolated for millions of years. We tested this hypothesis further by phylogeographic analyses of subterranean amphipods (Crangonyctoidea: Paramelitidae and Hyalidae) using mitochondrial DNA sequence data derived from the cytochrome oxidase I gene. Phylogenetic analyses and population genetic analyses (samova) provided strong evidence for the existence of at least 16 crangonyctoid and six hyalid divergent mitochondrial lineages, each restricted in their distribution to a single calcrete aquifer, in support of the ‘subterranean island (archipelago) hypothesis’ and extending its scope to include entirely water respiring invertebrates. Sequence divergence estimates between proximate calcrete populations suggest that calcretes have been isolated at least since the Pliocene, coinciding with a major aridity phase that led to the intermittent drying of surface water. The distribution of calcretes along palaeodrainage channels and on either side of drainage divides, have had less influence on the overall phylogeographic structure of populations, with evidence that ancestral crangonyctoid and hyalid species moved between catchments multiple times prior to their isolation within calcretes. At least two potential modes of evolution may account for the diversity of subterranean amphipod populations: dispersal/vicariance of stygobitic species or colonization of calcretes by surface species and independent evolution of stygobitic characteristics.
dc.description.statementofresponsibilitySteven J. B. Cooper, John H. Bradbury, Kathleen M. Saint, Remko Leys, Andrew D. Austin and William F. Humphreys
dc.identifier.citationMolecular Ecology, 2007; 16(7):1533-1544
dc.identifier.doi10.1111/j.1365-294X.2007.03261.x
dc.identifier.issn0962-1083
dc.identifier.issn1365-294X
dc.identifier.orcidCooper, S. [0000-0002-7843-8438]
dc.identifier.orcidAustin, A. [0000-0002-9602-2276]
dc.identifier.urihttp://hdl.handle.net/2440/41135
dc.language.isoen
dc.publisherBlackwell Publishing Ltd
dc.source.urihttps://doi.org/10.1111/j.1365-294x.2007.03261.x
dc.subjectAnimals
dc.subjectAmphipoda
dc.subjectDNA, Mitochondrial
dc.subjectDNA Primers
dc.subjectAnalysis of Variance
dc.subjectBayes Theorem
dc.subjectSequence Analysis, DNA
dc.subjectGenetics, Population
dc.subjectEcosystem
dc.subjectDemography
dc.subjectPopulation Dynamics
dc.subjectPhylogeny
dc.subjectBase Sequence
dc.subjectGeography
dc.subjectModels, Genetic
dc.subjectMolecular Sequence Data
dc.subjectWestern Australia
dc.subjectGenetic Variation
dc.titleSubterranean archipelago in the Australian arid zone: mitochondrial DNA phylogeography of amphipods from central Western Australia
dc.typeJournal article
pubs.publication-statusPublished

Files

Collections

Earth and Environmental Sciences publications
Environment Institute Leaders publications