Comparative phylogeography reveals consistently shallow genetic diversity in a mitochondrial marker in Antarctic bdelloid rotifers
Aim : The long history of isolation of the Antarctic continent, coupled with the harsh ecological conditions of freezing temperatures could affect the patterns of genetic diversity in the organisms living there. We aim (1) to test whether such pattern can be seen in a mitochondrial marker of bdelloi...
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ftzenodo:oai:zenodo.org:4676033 2024-09-15T17:44:08+00:00 Comparative phylogeography reveals consistently shallow genetic diversity in a mitochondrial marker in Antarctic bdelloid rotifers Fontaneto, Diego Vildan Cakil, Zeyneb Garlasché, Giuseppe Iakovenko, Nataliia Di Cesare, Andrea Eckert, Ester M. Guidetti, Roberto Hamdan, Lina Janko, Karel Lukashanets, Dzmitry Rebecchi, Lorena Schiaparelli, Stefano Sforzi, Tommaso Kašparová, Eva Štefková Velasco-Castrillón, Alejandro Walsh, Elizabeth 2022-03-04 https://doi.org/10.5061/dryad.sj3tx964b unknown Zenodo https://zenodo.org/communities/dryad https://doi.org/10.5061/dryad.sj3tx964b oai:zenodo.org:4676033 info:eu-repo/semantics/openAccess Creative Commons Zero v1.0 Universal https://creativecommons.org/publicdomain/zero/1.0/legalcode endemism meiofauna rotifera polar regions info:eu-repo/semantics/other 2022 ftzenodo https://doi.org/10.5061/dryad.sj3tx964b 2024-07-27T04:36:00Z Aim : The long history of isolation of the Antarctic continent, coupled with the harsh ecological conditions of freezing temperatures could affect the patterns of genetic diversity in the organisms living there. We aim (1) to test whether such pattern can be seen in a mitochondrial marker of bdelloid rotifers, a group of microscopic aquatic and limno-terrestrial animals, and (2) to speculate on the potential mechanisms driving the pattern. Location : focus on Antarctica. Taxon : Rotifera Bdelloidea. Methods : We analysed different metrics of genetic diversity, also spatially explicit ones, including number of haplotypes, accumulation curves, genetic distances, time to the most recent common ancestor, number of independently evolving units from DNA taxonomy, strength of the correlation between geographic and genetic distances, population genetics neutrality and differentiation indices, potential historical processes, obtained from an extensive sample of cytochrome oxidase subunit I (COI) sequences obtained from bdelloid rotifers. We included 2242 individuals from 23 species in a comparison between Antarctic and non-Antarctic taxa, correcting for sample size directly in the analyses and then by confirming the results also by using only a restricted dataset of nine well-sampled species. Results : Antarctic species had consistently lower genetic diversity and potential younger relative age than non-Antarctic species, even if they were similar in sample size, geographical extent, neutrality and differentiation indices, and correlation between genetic and geographic distances. Main conclusions : The extensive survey of genetic diversity in one mitochondrial marker in Antarctic bdelloids supports previous suggestions from other organisms that the origin and maintenance of terrestrial Antarctic fauna are different from those of other continents. Such differences could be speculated to be due, in the case of bdelloid rotifers, to the more recent origin of the species living there in comparison to non-Antarctic species. ... Other/Unknown Material Antarc* Antarctic Antarctica Zenodo |
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endemism meiofauna rotifera polar regions |
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endemism meiofauna rotifera polar regions Fontaneto, Diego Vildan Cakil, Zeyneb Garlasché, Giuseppe Iakovenko, Nataliia Di Cesare, Andrea Eckert, Ester M. Guidetti, Roberto Hamdan, Lina Janko, Karel Lukashanets, Dzmitry Rebecchi, Lorena Schiaparelli, Stefano Sforzi, Tommaso Kašparová, Eva Štefková Velasco-Castrillón, Alejandro Walsh, Elizabeth Comparative phylogeography reveals consistently shallow genetic diversity in a mitochondrial marker in Antarctic bdelloid rotifers |
topic_facet |
endemism meiofauna rotifera polar regions |
description |
Aim : The long history of isolation of the Antarctic continent, coupled with the harsh ecological conditions of freezing temperatures could affect the patterns of genetic diversity in the organisms living there. We aim (1) to test whether such pattern can be seen in a mitochondrial marker of bdelloid rotifers, a group of microscopic aquatic and limno-terrestrial animals, and (2) to speculate on the potential mechanisms driving the pattern. Location : focus on Antarctica. Taxon : Rotifera Bdelloidea. Methods : We analysed different metrics of genetic diversity, also spatially explicit ones, including number of haplotypes, accumulation curves, genetic distances, time to the most recent common ancestor, number of independently evolving units from DNA taxonomy, strength of the correlation between geographic and genetic distances, population genetics neutrality and differentiation indices, potential historical processes, obtained from an extensive sample of cytochrome oxidase subunit I (COI) sequences obtained from bdelloid rotifers. We included 2242 individuals from 23 species in a comparison between Antarctic and non-Antarctic taxa, correcting for sample size directly in the analyses and then by confirming the results also by using only a restricted dataset of nine well-sampled species. Results : Antarctic species had consistently lower genetic diversity and potential younger relative age than non-Antarctic species, even if they were similar in sample size, geographical extent, neutrality and differentiation indices, and correlation between genetic and geographic distances. Main conclusions : The extensive survey of genetic diversity in one mitochondrial marker in Antarctic bdelloids supports previous suggestions from other organisms that the origin and maintenance of terrestrial Antarctic fauna are different from those of other continents. Such differences could be speculated to be due, in the case of bdelloid rotifers, to the more recent origin of the species living there in comparison to non-Antarctic species. ... |
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Other/Unknown Material |
author |
Fontaneto, Diego Vildan Cakil, Zeyneb Garlasché, Giuseppe Iakovenko, Nataliia Di Cesare, Andrea Eckert, Ester M. Guidetti, Roberto Hamdan, Lina Janko, Karel Lukashanets, Dzmitry Rebecchi, Lorena Schiaparelli, Stefano Sforzi, Tommaso Kašparová, Eva Štefková Velasco-Castrillón, Alejandro Walsh, Elizabeth |
author_facet |
Fontaneto, Diego Vildan Cakil, Zeyneb Garlasché, Giuseppe Iakovenko, Nataliia Di Cesare, Andrea Eckert, Ester M. Guidetti, Roberto Hamdan, Lina Janko, Karel Lukashanets, Dzmitry Rebecchi, Lorena Schiaparelli, Stefano Sforzi, Tommaso Kašparová, Eva Štefková Velasco-Castrillón, Alejandro Walsh, Elizabeth |
author_sort |
Fontaneto, Diego |
title |
Comparative phylogeography reveals consistently shallow genetic diversity in a mitochondrial marker in Antarctic bdelloid rotifers |
title_short |
Comparative phylogeography reveals consistently shallow genetic diversity in a mitochondrial marker in Antarctic bdelloid rotifers |
title_full |
Comparative phylogeography reveals consistently shallow genetic diversity in a mitochondrial marker in Antarctic bdelloid rotifers |
title_fullStr |
Comparative phylogeography reveals consistently shallow genetic diversity in a mitochondrial marker in Antarctic bdelloid rotifers |
title_full_unstemmed |
Comparative phylogeography reveals consistently shallow genetic diversity in a mitochondrial marker in Antarctic bdelloid rotifers |
title_sort |
comparative phylogeography reveals consistently shallow genetic diversity in a mitochondrial marker in antarctic bdelloid rotifers |
publisher |
Zenodo |
publishDate |
2022 |
url |
https://doi.org/10.5061/dryad.sj3tx964b |
genre |
Antarc* Antarctic Antarctica |
genre_facet |
Antarc* Antarctic Antarctica |
op_relation |
https://zenodo.org/communities/dryad https://doi.org/10.5061/dryad.sj3tx964b oai:zenodo.org:4676033 |
op_rights |
info:eu-repo/semantics/openAccess Creative Commons Zero v1.0 Universal https://creativecommons.org/publicdomain/zero/1.0/legalcode |
op_doi |
https://doi.org/10.5061/dryad.sj3tx964b |
_version_ |
1810491491101966336 |