Pleistocene colonization of afro-alpine 'sky islands' by the arctic-alpine Arabis alpina
Times Cited: 0 International audience The afro-alpine region comprises the high mountains of Ethiopia and tropical East Africa, which represent biological 'sky islands' with high level of endemism. However, some primarily arctic-alpine plants also occur in the afro-alpine mountains. It has...
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Online Access: | https://hal.science/halsde-00276507 https://doi.org/10.1038/sj.hdy.6800974 |
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ftunivnantes:oai:HAL:halsde-00276507v1 2023-05-15T14:59:12+02:00 Pleistocene colonization of afro-alpine 'sky islands' by the arctic-alpine Arabis alpina Assefa, A. Ehrich, D. Taberlet, P. Nemomissa, S. Brochmann, C. Department of Biology Addis Ababa University (AAU) National Centre for Biosystematics (NCB) University of Oslo (UiO) Laboratoire d'Ecologie Alpine (LECA) Université Joseph Fourier - Grenoble 1 (UJF)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS) 2007 https://hal.science/halsde-00276507 https://doi.org/10.1038/sj.hdy.6800974 en eng HAL CCSD Nature Publishing Group info:eu-repo/semantics/altIdentifier/doi/10.1038/sj.hdy.6800974 halsde-00276507 https://hal.science/halsde-00276507 doi:10.1038/sj.hdy.6800974 ISSN: 0018-067X EISSN: 0018-067X Heredity https://hal.science/halsde-00276507 Heredity, 2007, 99 (2), pp.133-142. ⟨10.1038/sj.hdy.6800974⟩ afro-alpine phylogeography East Africa cpDNA Arabis alpina pleistocene [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDV.BID]Life Sciences [q-bio]/Biodiversity [SDV.EE]Life Sciences [q-bio]/Ecology environment info:eu-repo/semantics/article Journal articles 2007 ftunivnantes https://doi.org/10.1038/sj.hdy.6800974 2023-02-08T06:01:37Z Times Cited: 0 International audience The afro-alpine region comprises the high mountains of Ethiopia and tropical East Africa, which represent biological 'sky islands' with high level of endemism. However, some primarily arctic-alpine plants also occur in the afro-alpine mountains. It has been suggested that these plants are Tertiary relicts, but a recent worldwide study of Arabis alpina suggests that this species colonized the region twice during the Pleistocene. Here we investigate the detailed colonization history of A. alpina in the afro-alpine region based on chloroplast DNA sequences from 11 mountain systems. The results confirm the twice-into-Africa scenario. The Asian lineage is confined to the mountains closest to the Arabian Peninsula, on opposite sides of the Rift Valley (Simen Mts and Gara Muleta in Ethiopia), suggesting long-distance dispersal of this lineage. The African lineage is divided into two phylogeographic groups with distinct geographic distribution. The observed pattern is consistent with isolation of the African lineage in at least two interglacial refugia, located on separated highlands, followed by range expansion in cooler period(s), when the afro-alpine habitat extended further down the mountains. Several long-distance dispersal events, also across the Rift Valley, are suggested by single haplotypes observed outside the area occupied by the phylogeographic groups they belonged to. Article in Journal/Newspaper Arctic Université de Nantes: HAL-UNIV-NANTES Arctic Muleta ENVELOPE(-59.933,-59.933,-62.467,-62.467) Heredity 99 2 133 142 |
institution |
Open Polar |
collection |
Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
English |
topic |
afro-alpine phylogeography East Africa cpDNA Arabis alpina pleistocene [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDV.BID]Life Sciences [q-bio]/Biodiversity [SDV.EE]Life Sciences [q-bio]/Ecology environment |
spellingShingle |
afro-alpine phylogeography East Africa cpDNA Arabis alpina pleistocene [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDV.BID]Life Sciences [q-bio]/Biodiversity [SDV.EE]Life Sciences [q-bio]/Ecology environment Assefa, A. Ehrich, D. Taberlet, P. Nemomissa, S. Brochmann, C. Pleistocene colonization of afro-alpine 'sky islands' by the arctic-alpine Arabis alpina |
topic_facet |
afro-alpine phylogeography East Africa cpDNA Arabis alpina pleistocene [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDV.BID]Life Sciences [q-bio]/Biodiversity [SDV.EE]Life Sciences [q-bio]/Ecology environment |
description |
Times Cited: 0 International audience The afro-alpine region comprises the high mountains of Ethiopia and tropical East Africa, which represent biological 'sky islands' with high level of endemism. However, some primarily arctic-alpine plants also occur in the afro-alpine mountains. It has been suggested that these plants are Tertiary relicts, but a recent worldwide study of Arabis alpina suggests that this species colonized the region twice during the Pleistocene. Here we investigate the detailed colonization history of A. alpina in the afro-alpine region based on chloroplast DNA sequences from 11 mountain systems. The results confirm the twice-into-Africa scenario. The Asian lineage is confined to the mountains closest to the Arabian Peninsula, on opposite sides of the Rift Valley (Simen Mts and Gara Muleta in Ethiopia), suggesting long-distance dispersal of this lineage. The African lineage is divided into two phylogeographic groups with distinct geographic distribution. The observed pattern is consistent with isolation of the African lineage in at least two interglacial refugia, located on separated highlands, followed by range expansion in cooler period(s), when the afro-alpine habitat extended further down the mountains. Several long-distance dispersal events, also across the Rift Valley, are suggested by single haplotypes observed outside the area occupied by the phylogeographic groups they belonged to. |
author2 |
Department of Biology Addis Ababa University (AAU) National Centre for Biosystematics (NCB) University of Oslo (UiO) Laboratoire d'Ecologie Alpine (LECA) Université Joseph Fourier - Grenoble 1 (UJF)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Assefa, A. Ehrich, D. Taberlet, P. Nemomissa, S. Brochmann, C. |
author_facet |
Assefa, A. Ehrich, D. Taberlet, P. Nemomissa, S. Brochmann, C. |
author_sort |
Assefa, A. |
title |
Pleistocene colonization of afro-alpine 'sky islands' by the arctic-alpine Arabis alpina |
title_short |
Pleistocene colonization of afro-alpine 'sky islands' by the arctic-alpine Arabis alpina |
title_full |
Pleistocene colonization of afro-alpine 'sky islands' by the arctic-alpine Arabis alpina |
title_fullStr |
Pleistocene colonization of afro-alpine 'sky islands' by the arctic-alpine Arabis alpina |
title_full_unstemmed |
Pleistocene colonization of afro-alpine 'sky islands' by the arctic-alpine Arabis alpina |
title_sort |
pleistocene colonization of afro-alpine 'sky islands' by the arctic-alpine arabis alpina |
publisher |
HAL CCSD |
publishDate |
2007 |
url |
https://hal.science/halsde-00276507 https://doi.org/10.1038/sj.hdy.6800974 |
long_lat |
ENVELOPE(-59.933,-59.933,-62.467,-62.467) |
geographic |
Arctic Muleta |
geographic_facet |
Arctic Muleta |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
ISSN: 0018-067X EISSN: 0018-067X Heredity https://hal.science/halsde-00276507 Heredity, 2007, 99 (2), pp.133-142. ⟨10.1038/sj.hdy.6800974⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1038/sj.hdy.6800974 halsde-00276507 https://hal.science/halsde-00276507 doi:10.1038/sj.hdy.6800974 |
op_doi |
https://doi.org/10.1038/sj.hdy.6800974 |
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Heredity |
container_volume |
99 |
container_issue |
2 |
container_start_page |
133 |
op_container_end_page |
142 |
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