Relationships of the New Guinean subspecies, Gymnorhina tibicen papuana, of the Australian Magpie: an assessment from DNA sequence data
| Autor: | Alex Drew, Alicia Toon, Jane Hughes, Ian J. Mason, Leo Joseph |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
0106 biological sciences
0301 basic medicine education.field_of_study Land bridge Range (biology) Ecology Tibicen Biogeography Population Biology Subspecies biology.organism_classification 010603 evolutionary biology 01 natural sciences 03 medical and health sciences 030104 developmental biology Biological dispersal Animal Science and Zoology Australian magpie education Ecology Evolution Behavior and Systematics Nature and Landscape Conservation |
| Zdroj: | Emu - Austral Ornithology. 117:305-315 |
| ISSN: | 1448-5540 0158-4197 |
| DOI: | 10.1080/01584197.2017.1324249 |
| Popis: | Although it is well understood that New Guinea and Australia are essentially one landmass that connects periodically during sea-level fluctuations, the biogeographic history and effects of environmental change for species that span the two islands has not been studied in depth. The New Guinean subspecies of the Australian Magpie, Gymnorhina tibicen papuana, is known to share morphological traits with subspecies from north-western and south-western Australia (G. t. longirostris and G. t. dorsalis, respectively). Here, we use molecular data to explore the relationships of the New Guinean subspecies. Mitochondrial DNA supports a close relationship with a previously identified Australian phylogroup, which includes the two western Australian subspecies G. t. longirostris and G. t. dorsalis and western populations of what has been recognised as a northern subspecies G. t. eylandtensis. We infer that the formation of land bridges, most likely during the most recent glacial period, allowed movement of magpies between New Guinea and Australia but not, evidently, involving Cape York Peninsula, which is that part of Australia closest today to the range of G. t. papuana. Dispersal would have ceased following the most recent sea-level rise 16 500 years ago. Overall, our study is consistent with a hypothesis that savannah-associated species dispersed between Australia and New Guinea via a western route across land bridges associated with the Sahul Shelf. |
| Databáze: | OpenAIRE |
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