Could brown bears (Ursus arctos) have survived in Ireland during the Last Glacial Maximum?
| العنوان: | Could brown bears (Ursus arctos) have survived in Ireland during the Last Glacial Maximum? |
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| المؤلفون: | Claire Risley, Saoirse A. Leonard, Samuel T. Turvey |
| المصدر: | Biology Letters |
| بيانات النشر: | The Royal Society, 2013. |
| سنة النشر: | 2013 |
| مصطلحات موضوعية: | Pleistocene, Population, Population Dynamics, migration, Extinction, Biological, Models, Biological, Refugium (population biology), Animals, population viability analysis, Ice Cover, Glacial period, mammal extinction, Ursus, education, hybridization, Holocene, education.field_of_study, geography, geography.geographical_feature_category, biology, Geography, Ecology, Last Glacial Maximum, biology.organism_classification, Agricultural and Biological Sciences (miscellaneous), Hybridization, Genetic, Population Ecology, Ice sheet, General Agricultural and Biological Sciences, Animal Distribution, Ireland, refugium, Ursidae |
| الوصف: | Brown bears are recorded from Ireland during both the Late Pleistocene and early–mid Holocene. Although most of the Irish landmass was covered by an ice sheet during the Last Glacial Maximum (LGM), Irish brown bears are known to have hybridized with polar bears during the Late Pleistocene, and it is suggested that the Irish brown bear population did not become extinct but instead persistedin situthrough the LGM in a southwestern ice-free refugium. We use historical population modelling to demonstrate that brown bears are highly unlikely to have survived through the LGM in Ireland under any combination of life-history parameters shown by living bear populations, but instead would have rapidly become extinct following advance of the British–Irish ice sheet, and probably recolonized Ireland during the end-Pleistocene Woodgrange Interstadial from a closely related nearby source population. The time available for brown bear–polar bear hybridization was therefore restricted to narrow periods at the beginning or end of the LGM. Brown bears would have been extremely vulnerable to extinction in Quaternary habitat refugia and required areas substantially larger than southwestern Ireland to survive adverse glacial conditions. |
| اللغة: | English |
| تدمد: | 1744-957X 1744-9561 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0d7b80ebe88886b184c639f015163afe http://europepmc.org/articles/PMC3730640 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....0d7b80ebe88886b184c639f015163afe |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 1744957X 17449561 |
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