Biogeographic barriers in south-eastern Australia drive phylogeographic divergence in the garden skink, Lampropholis guichenoti

Chapple, David G.; Chapple, Stephanie N. J.; Thompson, Michael B.

doi:10.1111/j.1365-2699.2011.02531.x

Cited by 49 publications

(76 citation statements)

References 75 publications

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“…; and garden skinks Chapple et al . ). Phylogeographic studies of these taxa suggest that the high‐elevation Great Dividing Range as well as the Mt Lofty Ranges in South Australia may provide a range of suitable conditions for mesic‐adapted species during arid glacial periods (Byrne ; Chapple et al .…”

Section: Discussionmentioning

confidence: 97%

Population and phylogenomic decomposition via genotyping‐by‐sequencing in Australian Pelargonium

et al. 2016

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Species delimitation has seen a paradigm shift as increasing accessibility of genomic-scale data enables separation of lineages with convergent morphological traits and the merging of recently diverged ecotypes that have distinguishing characteristics. We inferred the process of lineage formation among Australian species in the widespread and highly variable genus Pelargonium by combining phylogenomic and population genomic analyses along with breeding system studies and character analysis. Phylogenomic analysis and population genetic clustering supported seven of the eight currently described species but provided little evidence for differences in genetic structure within the most widely distributed group that containing P. australe. In contrast, morphometric analysis detected three deep lineages within Australian Pelargonium; with P. australe consisting of five previously unrecognized entities occupying separate geographic ranges. The genomic approach enabled elucidation of parallel evolution in some traits formerly used to delineate species, as well as identification of ecotypic morphological differentiation within recognized species. Highly variable morphology and trait convergence each contribute to the discordance between phylogenomic relationships and morphological taxonomy. Data suggest that genetic divergence among species within the Australian Pelargonium may result from allopatric speciation while morphological differentiation within and among species may be more strongly driven by environmental differences.

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Section: Discussionmentioning

confidence: 97%

Population and phylogenomic decomposition via genotyping‐by‐sequencing in Australian Pelargonium

et al. 2016

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“…Our extensive sampling also identified sub‐structuring within the northern mainland and Tasmanian lineages but not the southern mainland lineage. Relationships among haplotypes within the southern mainland lineage indicated widespread connectivity across southeastern Australia on an evolutionary time‐scale, unlike the herpetofauna of the region (Chapple et al ., ; Ng et al ., ; Pepper et al ., ). Microsatellite and mtDNA data were congruent in demonstrating differentiation between Tasmania and mainland populations, as well as significant structuring among P. tridactylus populations now isolated because of recent human modification to the landscape.…”

Section: Discussionmentioning

confidence: 99%

Evolutionary and contemporary responses to habitat fragmentation detected in a mesic zone marsupial, the long‐nosed potoroo (Potorous tridactylus) in south‐eastern Australia

Frankham

Handasyde

Eldridge

2015

Journal of Biogeography

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Aim Outside of Australia's Wet Tropics, studies of the biogeographical patterns of unglaciated Southern Hemisphere mesic environments are limited, and have primarily focused on herpetofauna. In this study mitochondrial DNA (mtDNA) and microsatellite (nuDNA) analyses were used to investigate the impact of biogeographical barriers on the evolutionary history of the widespread Australian marsupial Potorous tridactylus, as well as the effect of recent human‐mediated habitat fragmentation. Location Australia; Queensland, New South Wales, Victoria, and Tasmania. Methods Three hundred and fifty‐four individuals from 39 sites (representing 16 regional populations) across the species range were assessed for mtDNA Control Region and microsatellite (10 loci) variation. Genetic diversity, phylogeographical relationships and population structure were examined, as well as evidence for isolation by distance and past population expansion. Results Three highly divergent and reciprocally monophyletic mtDNA lineages were resolved (two mainland, one Tasmanian). A deep phylogeographical break, not associated with any obvious biogeographical barrier, was present on the mainland. Within the northern mainland and Tasmanian lineages, sub‐structuring was coincident with the presence of physical barriers to gene flow. Fine‐scale structuring was also present, with regional populations highly differentiated. Main conclusions This study expands on previous studies of Australia's mesic biome. Major phylogeographical breaks were identified, that dated to the Miocene (within the mainland) and Pliocene (isolation of Tasmanian), and differed from those described for the region's herpetofauna in age or location. The major mainland break appears species specific within this topographically complex region of Australia. Tasmanian populations were isolated from the mainland well before the most recent flooding of Bass Strait. Minor phylogenetic breaks within Tasmanian and northern NSW were associated with known biogeographical barriers. An absence of sub‐structuring within the southern mainland lineage suggests extensive historical connectivity. The presence of regional population structure suggests that post‐European settlement, local populations have become isolated and differentiated.

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“…In some taxa, disjunctions among clades occur further south of the Hunter Valley, possibly associated with other lowland open forests (see following section), although this pattern may also represent southward re‐expansion of northern populations following initial divergence across the HVB. Estimated divergence times generally are concordant with expectations for vicariance of closed forest driving divergence in isolation, appearing to cluster around the Pliocene, with older divergences estimated for Lampropholis guichenoti in the mid‐Miocene (Chapple et al ., ) and late Miocene for Austrarchaea assassin spiders (Rix & Harvey, ; Fig. ).…”

Section: Hunter Valley Barriermentioning

confidence: 98%

“…In the broader phylogeographical literature for Australia's eastern forests, the Main, McPherson and Border Ranges (MMBR) are inferred to have driven the disjunction of open and dry forest‐adapted taxa that inhabit the lowlands either side (e.g. James and Moritz, 2000; Chapple, Chapple & Thompson, ). This is intuitive, because these mountains harbour some of the oldest and most stable closed forests outside of the Wet Tropics of north Queensland (Weber et al ., ; Rosauer et al ., ) and this, along with their physical topography, has surely acted as a significant ecological barrier to many dry forest taxa in the past.…”

Section: Brisbane Valley Barriermentioning

confidence: 99%

Lines in the land: a review of evidence for eastern Australia's major biogeographical barriers to closed forest taxa

Bryant

Krosch

2016

Biol. J. Linn. Soc.

125

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The influence of climatic changes occurring since the late Miocene on Australia's eastern mesic ecosystems has received significant attention over the past 20 years. In particular, the impact of the dramatic shift from widespread rainforest habitat to a much drier landscape in which closed forest refugia were dissected by open woodland/savannah ecosystems has long been a focal point in Australian ecology and biogeography. Several specific regions along the eastern coast have been identified previously as potentially representing major biogeographical disjunctions for closed forest taxa. Initially, evidence stemmed from recognition of common zones where avian species/subspecies distributions and/or floral communities were consistently separated, but the body of work has since grown significantly with the rise of molecular phylogeographic tools and there is now a significant literature base that discusses the drivers, processes and effects of these hypothesised major biogeographical junctions (termed barriers). Here, we review the literature concerning eight major barriers argued to have influenced closed forest taxa; namely, the Laura Basin, Black Mountain Corridor, Burdekin Gap, Saint Lawrence Gap, Brisbane Valley Barrier, Hunter Valley Barrier, Southern Transition Zone and East Gippsland Barrier. We synthesise reported phylogeographical patterns and the inferred timing of influence with current climatic, vegetation and geological characteristics for each barrier to provide insights into regional evolution and seek to elicit common trends. All eight putative biogeographical barriers are characterised currently by lowland zones of drier, warmer, more open woodland and savannah habitat, with adjacent closed forest habitats isolated to upland cool, wet refugia. Molecular divergence estimates suggest two pulses of divergence, one in the early Miocene (~20–15 Mya) and a later one from the Pliocene–Pleistocene (~6–0.04 Mya). We conclude with a prospectus for future research on the eastern Australian closed forests and highlight critical issues for ongoing studies of biogeographical barriers worldwide.

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Biogeographic barriers in south-eastern Australia drive phylogeographic divergence in the garden skink, Lampropholis guichenoti

Cited by 49 publications

References 75 publications

Population and phylogenomic decomposition via genotyping‐by‐sequencing in Australian Pelargonium

Population and phylogenomic decomposition via genotyping‐by‐sequencing in Australian Pelargonium

Evolutionary and contemporary responses to habitat fragmentation detected in a mesic zone marsupial, the long‐nosed potoroo (Potorous tridactylus) in south‐eastern Australia

Lines in the land: a review of evidence for eastern Australia's major biogeographical barriers to closed forest taxa

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