Speciation in Australian Birds Adapted to Arid Habitats

Ford, Julian

doi:10.1071/mu974161

Cited by 56 publications

(32 citation statements)

References 20 publications

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“…Similarly, the Eyrean Barrier in southern Australia (Ford 1974a;Schodde 1982;Fig. 5) has been recognised as an agent of vicariance giving rise to eastern and western differentiates in the Australian Ringneck and the Splendid Fairy-wren (Ford 1987).…”

Section: Hybrid Zones Biogeographical Barriers and Modes Of Speciationmentioning

confidence: 99%

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Phylogeography: its development and impact in Australo-Papuan ornithology with special reference to paraphyly in Australian birds

Joseph

Omland

2009

Emu - Austral Ornithology

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Abstract.With examples from Australo-Papuan ornithology, we examine the technical and theoretical roots of molecular phylogeography and review its development. We describe the progression from ad hoc interpretation of gene trees in single species phylogeographic studies through to comparative phylogeography and currently advocated model-testing approaches. Mitochondrial DNA (mtDNA) sequences have provided most advances to date, although we demonstrate and advocate the future use of multilocus datasets analysed with coalescent methods. We examine interrelationships among speciation research, historical biogeography, phylogeography and landscape genetics. Mitochondrial paraphyly, in which individuals of one species or population have mtDNA that is more closely related to that of another than to their own, emerges in 44% of Australian studies to date as a common, important result in Australian avian phylogeography. Accordingly, we explore at length its most common causes and its impact on case studies in Australo-Papuan avian phylogeography. The impact of so much paraphyly on avian phylogeography and taxonomy is a major theme of the review. We suggest a full research agenda for avian phylogeography in the AustraloPapuan region that spans diverse topics: the need for more studies of pelagic birds, spatio-temporal links between New Guinea and Australia, island populations, testing of long-established biogeographical hypotheses, and integration of molecular and non-molecular datasets into integrated evolutionary understanding of species and populations. Studying the full continuum of divergences from landscape genetics, to phylogeography, to recently diverged species with evidence of paraphyly, to highly divergent species with many fixed differences will lead to a more complete understanding of the processes and patterns of avian evolution.

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Section: Hybrid Zones Biogeographical Barriers and Modes Of Speciationmentioning

confidence: 99%

“…5 shows hybrid zones and putative historical biogeographical barriers recognised for Australian birds (see Keast 1961;Ford 1974aFord , 1987Schodde and Mason 1999). Only a few phylogeographic studies have tested this rich literature, however.…”

Section: Hybrid Zones Biogeographical Barriers and Modes Of Speciationmentioning

confidence: 99%

Phylogeography: its development and impact in Australo-Papuan ornithology with special reference to paraphyly in Australian birds

Joseph

Omland

2009

Emu - Austral Ornithology

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“…The greatest number of contacts coincide with the Carpentarian, Burdekin-Lynd, Burdekin, McPherson and Mallee barriers. Secondary contacts in lower south-west of Western Australia have been produced by a westward expansion of eastern vicariants, either from the south-eastern or palaeo-South Australian refuge (Keast 1961;Ford 1974b;Serventy & Whittell 1976), whereas many of the contacts in the eastern Mallee belt are due to eastward expansions of either south-western or palaeo-South Australian isolates (Keast 196 1;Ford 1974bFord , 1986Schodde 198 1). In differential expansions, the drier adapted form has invariably dispersed the greater distance (e.g.…”

Section: P R E S E N Tmentioning

confidence: 99%

“…Thus, one arm of the Eyrean Barrier actually incorporated the Mallee Barrier and extended to the Bassian Plain. The concept and name of the Eyrean Barrier was fist introduced by Ford & Parker (1974) and discussed by Ford (1974b) who indicated that it now consists of a dry salient stretching northward from Spencer Gulf, through the Lake Eyre Basin to and beyond Simpson Desert. Sewenty (1953Sewenty ( , 1972 believed that the barrier formerly involved in splitting semi-arid and arid faunal elements in this region was Lake Dieri, a greatly expanded Pleistocene Lake incorporating Lake Eyre and Lake Frome.…”

Section: Stability Of Hybrid Zonesmentioning

confidence: 99%

“…The refuge area concept, entailing an allopatric mechanism of speciation and the close association of many bird species with certain vegetation types, has generally been advanced to explain distribution patterns and speciation sequences in Australian birds (Gentilli 1949;Serventy 195 1;Keast 1961;Ford 1974b). If hybrid zones represent thwarted stages of the speciation process in which differentiated vicars prematurely rejoin before acquiring different sets of recognition signalling-systems (Paterson 1982), the general geographic positions of hybrid zones would tend to cluster across the former barriers (Endler 1982a(Endler , 1982b).…”

Section: Introductionmentioning

confidence: 99%

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Hybrid Zones in Australian Birds

Ford

1987

Emu - Austral Ornithology

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Summary Ford, J. (1987). Hybrid zones in Australian birds. Emu 87, 158-178.Geographic patterns in positions of 79-87 avian hybrid zones and 12 parapatric contacts in Australia are analysed in the context of past climates, palaeo-refugia, mechanisms of origin, and temporal stability. No hybrid zone occurs in rain-forest species and differentiated vicariant forms of these are generally separated by unsuitable tracts of sclerophyll forest or savanna woodland. Most hybrid zones occur in semi-arid and sub-humid species. The zones appear to have originated by secondary contact of differentiated vicars rather than by parapatric divergence, because most lie between refugia postulated on the basis of late Pleistocene climates; their widths are generally in accord with those predicted from dispersion rates. The evidence suggests that most, if not all, hybrid zones were formed when expansion of isolates from refugia became possible following the marked improvement in climate at the close of the severe arid phase of about 17 000 y before present. The persistence of hybnd zones since then and their widths offer no support for the concept of reinforcement of previously acquired differences in recognition (signalling) systems. Where a hybrid zone coincides closely with the boundary of a presumed refuge, a semiarid form has differentially expanded towards its subhumid counterpart.

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A species assemblage approach to comparative phylogeography of birds in southern Australia

Dolman

Joseph

2012

Ecology and Evolution

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We present a novel approach to investigating the divergence history of biomes and their component species using single-locus data prior to investing in multilocus data. We use coalescent-based hierarchical approximate Bayesian computation (HABC) methods (MsBayes) to estimate the number and timing of discrete divergences across a putative barrier and to assign species to their appropriate period of co-divergence. We then apply a coalescent-based full Bayesian model of divergence (IMa) to suites of species shown to have simultaneously diverged. The full Bayesian model results in reduced credibility intervals around divergence times and allows other parameters associated with divergence to be summarized across species assemblages. We apply this approach to 10 bird species that are wholly or patchily discontinuous in semi-arid habitats between Australia's southwest (SW) and southeast (SE) mesic zones. There was substantial support for up to three discrete periods of divergence. HABC indicates that two species wholly restricted to more mesic habitats diverged earliest, between 594,382 and 3,417,699 years ago, three species from semi-arid habitats diverged between 0 and 1,508,049 years ago, and four diverged more recently, between 0 and 396,843 years ago. Eight species were assigned to three periods of co-divergence with confidence. For full Bayesian analyses, we accounted for uncertainty in the two remaining species by analyzing all possible suites of species. Estimates of divergence times from full Bayesian divergence models ranged between 429,105 and 2,006,355; 67,172 and 663,837; and 24,607 and 171,085 for the earliest, middle, and most recent periods of co-divergence, respectively. This single-locus approach uses the power of multitaxa coalescent analyses as an efficient means of generating a foundation for further, targeted research using multilocus and genomic tools applied to an understudied biome.

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Speciation in Australian Birds Adapted to Arid Habitats

Cited by 56 publications

References 20 publications

Phylogeography: its development and impact in Australo-Papuan ornithology with special reference to paraphyly in Australian birds

Phylogeography: its development and impact in Australo-Papuan ornithology with special reference to paraphyly in Australian birds

Hybrid Zones in Australian Birds

A species assemblage approach to comparative phylogeography of birds in southern Australia

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