No need for stepping stones: Direct, joint dispersal of the lichen‐forming fungus Mastodia tessellata (Ascomycota) and its photobiont explains their bipolar distribution
Abstract Aim The hypotheses proposed to explain the high percentage of bipolar lichens in Antarctica have never been explicitly tested. We used the strictly bipolar, coastal lichenized fungus Mastodia tessellata ( Verrucariaceae , Ascomycota) and its photobionts ( Prasiola , Trebouxiophyceae , Chlor...
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crwiley:10.1111/jbi.13105 2024-09-15T17:43:23+00:00 No need for stepping stones: Direct, joint dispersal of the lichen‐forming fungus Mastodia tessellata (Ascomycota) and its photobiont explains their bipolar distribution Garrido‐Benavent, Isaac de los Ríos, Asunción Fernández‐Mendoza, Fernando Pérez‐Ortega, Sergio Spanish Ministries of Education and Economy and Competitiveness 2017 http://dx.doi.org/10.1111/jbi.13105 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fjbi.13105 https://onlinelibrary.wiley.com/doi/pdf/10.1111/jbi.13105 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Biogeography volume 45, issue 1, page 213-224 ISSN 0305-0270 1365-2699 journal-article 2017 crwiley https://doi.org/10.1111/jbi.13105 2024-07-02T04:13:26Z Abstract Aim The hypotheses proposed to explain the high percentage of bipolar lichens in Antarctica have never been explicitly tested. We used the strictly bipolar, coastal lichenized fungus Mastodia tessellata ( Verrucariaceae , Ascomycota) and its photobionts ( Prasiola , Trebouxiophyceae , Chlorophyta) as model species to discern whether this extraordinary disjunction originated from vicariance or long‐distance dispersal. Location Coasts of Antarctica, Tierra del Fuego (Chile), Alaska ( USA ) and British Columbia (Canada). Methods Based on a comprehensive geographical (315 specimens and 16 populations from Antarctica, Tierra del Fuego and North America) and molecular sampling (three and four loci for the fungus and algae respectively), we implemented explicit Bayesian methods to compare alternative hypotheses of speciation and migration, and performed dating analyses for the fungal and algal partner, in order to infer the timing of the colonization events and the direction of gene flow among distant, disjunct areas. Results Mastodia tessellata comprises two fungal species which in turn associate with three photobiont lineages along the studied distribution range. Independent estimation of divergence ages for myco‐ and photobionts indicated a middle to latest Miocene species split in the Southern Hemisphere, and a late Miocene to Pleistocene acquisition of the bipolar distribution. Comparison of migration models and genetic diversity patterns suggested an austral origin for the bipolar species. Main conclusions The complex evolutionary history of Mastodia tessellata s.l . can be explained by a combination of vicariant and long‐distance dispersal mechanisms. We provide novel evidence of a pre‐Pleistocene long‐term evolution of lichens in Antarctica as well as for bipolar distributions shaped by Southern to Northern Hemisphere migratory routes without the need for stepping stones. Article in Journal/Newspaper Antarc* Antarctica Alaska Stepping Stones Tierra del Fuego Wiley Online Library Journal of Biogeography 45 1 213 224 |
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Open Polar |
collection |
Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract Aim The hypotheses proposed to explain the high percentage of bipolar lichens in Antarctica have never been explicitly tested. We used the strictly bipolar, coastal lichenized fungus Mastodia tessellata ( Verrucariaceae , Ascomycota) and its photobionts ( Prasiola , Trebouxiophyceae , Chlorophyta) as model species to discern whether this extraordinary disjunction originated from vicariance or long‐distance dispersal. Location Coasts of Antarctica, Tierra del Fuego (Chile), Alaska ( USA ) and British Columbia (Canada). Methods Based on a comprehensive geographical (315 specimens and 16 populations from Antarctica, Tierra del Fuego and North America) and molecular sampling (three and four loci for the fungus and algae respectively), we implemented explicit Bayesian methods to compare alternative hypotheses of speciation and migration, and performed dating analyses for the fungal and algal partner, in order to infer the timing of the colonization events and the direction of gene flow among distant, disjunct areas. Results Mastodia tessellata comprises two fungal species which in turn associate with three photobiont lineages along the studied distribution range. Independent estimation of divergence ages for myco‐ and photobionts indicated a middle to latest Miocene species split in the Southern Hemisphere, and a late Miocene to Pleistocene acquisition of the bipolar distribution. Comparison of migration models and genetic diversity patterns suggested an austral origin for the bipolar species. Main conclusions The complex evolutionary history of Mastodia tessellata s.l . can be explained by a combination of vicariant and long‐distance dispersal mechanisms. We provide novel evidence of a pre‐Pleistocene long‐term evolution of lichens in Antarctica as well as for bipolar distributions shaped by Southern to Northern Hemisphere migratory routes without the need for stepping stones. |
author2 |
Spanish Ministries of Education and Economy and Competitiveness |
format |
Article in Journal/Newspaper |
author |
Garrido‐Benavent, Isaac de los Ríos, Asunción Fernández‐Mendoza, Fernando Pérez‐Ortega, Sergio |
spellingShingle |
Garrido‐Benavent, Isaac de los Ríos, Asunción Fernández‐Mendoza, Fernando Pérez‐Ortega, Sergio No need for stepping stones: Direct, joint dispersal of the lichen‐forming fungus Mastodia tessellata (Ascomycota) and its photobiont explains their bipolar distribution |
author_facet |
Garrido‐Benavent, Isaac de los Ríos, Asunción Fernández‐Mendoza, Fernando Pérez‐Ortega, Sergio |
author_sort |
Garrido‐Benavent, Isaac |
title |
No need for stepping stones: Direct, joint dispersal of the lichen‐forming fungus Mastodia tessellata (Ascomycota) and its photobiont explains their bipolar distribution |
title_short |
No need for stepping stones: Direct, joint dispersal of the lichen‐forming fungus Mastodia tessellata (Ascomycota) and its photobiont explains their bipolar distribution |
title_full |
No need for stepping stones: Direct, joint dispersal of the lichen‐forming fungus Mastodia tessellata (Ascomycota) and its photobiont explains their bipolar distribution |
title_fullStr |
No need for stepping stones: Direct, joint dispersal of the lichen‐forming fungus Mastodia tessellata (Ascomycota) and its photobiont explains their bipolar distribution |
title_full_unstemmed |
No need for stepping stones: Direct, joint dispersal of the lichen‐forming fungus Mastodia tessellata (Ascomycota) and its photobiont explains their bipolar distribution |
title_sort |
no need for stepping stones: direct, joint dispersal of the lichen‐forming fungus mastodia tessellata (ascomycota) and its photobiont explains their bipolar distribution |
publisher |
Wiley |
publishDate |
2017 |
url |
http://dx.doi.org/10.1111/jbi.13105 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fjbi.13105 https://onlinelibrary.wiley.com/doi/pdf/10.1111/jbi.13105 |
genre |
Antarc* Antarctica Alaska Stepping Stones Tierra del Fuego |
genre_facet |
Antarc* Antarctica Alaska Stepping Stones Tierra del Fuego |
op_source |
Journal of Biogeography volume 45, issue 1, page 213-224 ISSN 0305-0270 1365-2699 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/jbi.13105 |
container_title |
Journal of Biogeography |
container_volume |
45 |
container_issue |
1 |
container_start_page |
213 |
op_container_end_page |
224 |
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1810490337765883904 |