Data from: Pleistocene expansion of the bipolar lichen Cetraria aculeata into the Southern hemisphere
Data files
Dec 14, 2012 version files 594.14 MB
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GPD_haplotypes.nex
26.84 KB
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gpd_maps.log
213.68 MB
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gpd47seqsa.nex
43.06 KB
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GPDb.nex
324.71 KB
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ITS_haplotypes.nex
23.77 KB
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its_maps.log
190.03 MB
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ITS60seqsA.nex
30.74 KB
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ITSb.nex
183.34 KB
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MEC_Complete_Dataset.txt
52.33 KB
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mtLSU_haplotypes.nex
13.14 KB
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mtlsu_maps.log
189.39 MB
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mtlsu27seqsA.nex
23.12 KB
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mtlsub.nex
304.72 KB
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plotsEnd.r
5.61 KB
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README_for_gpd_maps.txt
1.04 KB
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README_for_its_maps.txt
1.04 KB
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README_for_MEC_Complete_Dataset.txt
1.20 KB
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README_for_mtlsu_maps.txt
1.04 KB
Abstract
Many boreal and polar lichens occupy bipolar distributional ranges that frequently extend into high mountains at lower latitudes. Although such disjunctions are more common among lichens than in other groups of organisms, the geographic origin of bipolar lichen taxa, and the way and time frame in which they colonized their ranges have not been studied in detail. We used the predominantly vegetative, widespread lichen Cetraria aculeata as a model species. We surveyed the origin and history of its bipolar pattern using population genetics, phylogenetic and genealogical reconstruction methods. Cetraria aculeata originated in the Northern Hemisphere and dispersed southwards during the Pleistocene. The genetic signal suggests a Pleistocene dispersive burst in which a population size expansion concurred with the acquisition of a South-American range that culminated in the colonization of the Antarctic.