Ancient landscapes of the Namib Desert harbor high levels of genetic variability and deeply divergent lineages for Collembola
AIM : To assess spatial patterns of genetic and species‐level diversity for Namib Desert Collembola using mitochondrial DNA cytochrome c oxidase subunit I (COI) gene sequences. LOCATION : Namib Desert gravel plains. TAXON : Collembola (springtails). METHODS : A total of 77 soil samples were collecte...
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ftunivpretoria:oai:repository.up.ac.za:2263/75581 2023-05-15T14:02:19+02:00 Ancient landscapes of the Namib Desert harbor high levels of genetic variability and deeply divergent lineages for Collembola Collins, Gemma E. Hogg, Ian D. Baxter, Janine R. Cowan, Don A. 2019-04 http://hdl.handle.net/2263/75581 https://doi.org/10.1002/ece3.5103 en eng Wiley Open Access http://hdl.handle.net/2263/75581 2045-7758 (online) doi:10.1002/ece3.5103 © 2019 The Authors. This is an open access article under the terms of the Creative Commons Attribution License. CC-BY Biogeography Collembola Genetic diversity Namib Desert Article 2019 ftunivpretoria https://doi.org/10.1002/ece3.5103 2022-05-31T13:21:05Z AIM : To assess spatial patterns of genetic and species‐level diversity for Namib Desert Collembola using mitochondrial DNA cytochrome c oxidase subunit I (COI) gene sequences. LOCATION : Namib Desert gravel plains. TAXON : Collembola (springtails). METHODS : A total of 77 soil samples were collected along NE‐SW (60 km) and E‐W (160 km) transects from within a 4,000 km2 area of the Namib Desert gravel plains. We extracted 434 springtails from the 37 samples which contained Collembola and sequenced them at the COI gene locus. In the absence of specific taxonomic keys and previous genetic data for these taxa, we used Generalized Mixed Yule Coalescent (GMYC) analyses to provide putative species‐level designations. RESULTS : We obtained 341 successful COI sequences, 175 of which were unique haplotypes. GMYC analyses identified 30 putative species, with up to 28% sequence divergence (uncorrected p‐distance). The distribution of genetic variants was disjunct, with 97% of haplotypes and 70% of “GMYC species” found only at single sites. MAIN CONCLUSIONS : Dispersal events, although rare, may be facilitated by environmental events such as prevailing onshore winds or occasional flow of rainwater to the coast. We conclude that the high genetic diversity we observed is the result of ancient springtail lineages, patchy distribution of suitable habitats, and limited dispersal (gene flow) among habitable locations. The World Academy of Sciences (TWAS) fellowship, the University of Pretoria Genomics Research Institute, a Waikato University Doctoral Scholarship, a Waikato Graduate Women Merit Award for Doctoral Study and an Antarctica New Zealand Postgraduate Scholarship. http://www.ecolevol.org am2020 Genetics Article in Journal/Newspaper Antarc* Antarctica Antarctica New Zealand Springtail University of Pretoria: UPSpace New Zealand Ecology and Evolution 9 8 4969 4979 |
institution |
Open Polar |
collection |
University of Pretoria: UPSpace |
op_collection_id |
ftunivpretoria |
language |
English |
topic |
Biogeography Collembola Genetic diversity Namib Desert |
spellingShingle |
Biogeography Collembola Genetic diversity Namib Desert Collins, Gemma E. Hogg, Ian D. Baxter, Janine R. Cowan, Don A. Ancient landscapes of the Namib Desert harbor high levels of genetic variability and deeply divergent lineages for Collembola |
topic_facet |
Biogeography Collembola Genetic diversity Namib Desert |
description |
AIM : To assess spatial patterns of genetic and species‐level diversity for Namib Desert Collembola using mitochondrial DNA cytochrome c oxidase subunit I (COI) gene sequences. LOCATION : Namib Desert gravel plains. TAXON : Collembola (springtails). METHODS : A total of 77 soil samples were collected along NE‐SW (60 km) and E‐W (160 km) transects from within a 4,000 km2 area of the Namib Desert gravel plains. We extracted 434 springtails from the 37 samples which contained Collembola and sequenced them at the COI gene locus. In the absence of specific taxonomic keys and previous genetic data for these taxa, we used Generalized Mixed Yule Coalescent (GMYC) analyses to provide putative species‐level designations. RESULTS : We obtained 341 successful COI sequences, 175 of which were unique haplotypes. GMYC analyses identified 30 putative species, with up to 28% sequence divergence (uncorrected p‐distance). The distribution of genetic variants was disjunct, with 97% of haplotypes and 70% of “GMYC species” found only at single sites. MAIN CONCLUSIONS : Dispersal events, although rare, may be facilitated by environmental events such as prevailing onshore winds or occasional flow of rainwater to the coast. We conclude that the high genetic diversity we observed is the result of ancient springtail lineages, patchy distribution of suitable habitats, and limited dispersal (gene flow) among habitable locations. The World Academy of Sciences (TWAS) fellowship, the University of Pretoria Genomics Research Institute, a Waikato University Doctoral Scholarship, a Waikato Graduate Women Merit Award for Doctoral Study and an Antarctica New Zealand Postgraduate Scholarship. http://www.ecolevol.org am2020 Genetics |
format |
Article in Journal/Newspaper |
author |
Collins, Gemma E. Hogg, Ian D. Baxter, Janine R. Cowan, Don A. |
author_facet |
Collins, Gemma E. Hogg, Ian D. Baxter, Janine R. Cowan, Don A. |
author_sort |
Collins, Gemma E. |
title |
Ancient landscapes of the Namib Desert harbor high levels of genetic variability and deeply divergent lineages for Collembola |
title_short |
Ancient landscapes of the Namib Desert harbor high levels of genetic variability and deeply divergent lineages for Collembola |
title_full |
Ancient landscapes of the Namib Desert harbor high levels of genetic variability and deeply divergent lineages for Collembola |
title_fullStr |
Ancient landscapes of the Namib Desert harbor high levels of genetic variability and deeply divergent lineages for Collembola |
title_full_unstemmed |
Ancient landscapes of the Namib Desert harbor high levels of genetic variability and deeply divergent lineages for Collembola |
title_sort |
ancient landscapes of the namib desert harbor high levels of genetic variability and deeply divergent lineages for collembola |
publisher |
Wiley Open Access |
publishDate |
2019 |
url |
http://hdl.handle.net/2263/75581 https://doi.org/10.1002/ece3.5103 |
geographic |
New Zealand |
geographic_facet |
New Zealand |
genre |
Antarc* Antarctica Antarctica New Zealand Springtail |
genre_facet |
Antarc* Antarctica Antarctica New Zealand Springtail |
op_relation |
http://hdl.handle.net/2263/75581 2045-7758 (online) doi:10.1002/ece3.5103 |
op_rights |
© 2019 The Authors. This is an open access article under the terms of the Creative Commons Attribution License. |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1002/ece3.5103 |
container_title |
Ecology and Evolution |
container_volume |
9 |
container_issue |
8 |
container_start_page |
4969 |
op_container_end_page |
4979 |
_version_ |
1766272526184349696 |