Effects of dispersal strategy and migration history on genetic diversity and population structure of Antarctic lichens
Abstract Aim The homogenisation of historically isolated gene pools has been recognised as one of the most serious conservation problems in the Antarctic. Lichens are the dominant components of terrestrial biotas in the Antarctic and in high mountain ranges of southern South America. We study the ef...
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crwiley:10.1111/jbi.14101 2024-04-07T07:47:34+00:00 Effects of dispersal strategy and migration history on genetic diversity and population structure of Antarctic lichens Lagostina, Elisa Andreev, Mikhail Dal Grande, Francesco Grewe, Felix Lorenz, Aline Lumbsch, H. Thorsten Rozzi, Ricardo Ruprecht, Ulrike Sancho, Leopoldo García Søchting, Ulrik Scur, Mayara Wirtz, Nora Printzen, Christian 2021 http://dx.doi.org/10.1111/jbi.14101 https://onlinelibrary.wiley.com/doi/pdf/10.1111/jbi.14101 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/jbi.14101 en eng Wiley http://creativecommons.org/licenses/by-nc-nd/4.0/ Journal of Biogeography volume 48, issue 7, page 1635-1653 ISSN 0305-0270 1365-2699 Ecology Ecology, Evolution, Behavior and Systematics journal-article 2021 crwiley https://doi.org/10.1111/jbi.14101 2024-03-14T00:43:36Z Abstract Aim The homogenisation of historically isolated gene pools has been recognised as one of the most serious conservation problems in the Antarctic. Lichens are the dominant components of terrestrial biotas in the Antarctic and in high mountain ranges of southern South America. We study the effects of dispersal strategy and migration history on their genetic structure to better understand the importance of these processes and their interplay in shaping population structure as well as their relevance for conservation. Location Maritime Antarctic and southern South America. Methods Populations of three fruticose lichen species, Usnea aurantiacoatra , U. antarctica and Cetraria aculeata , were collected in different localities in the Maritime Antarctic and southern South America. Usnea aurantiacoatra reproduces sexually by ascospores, whereas the other two species mostly disperse asexually by symbiotic diaspores. Samples were genotyped at 8–22 microsatellite loci. Different diversity and variance metrics, Bayesian cluster analyses and Discriminant Analysis of Principal Components (DAPC) were used to study population genetic structure. Historical migration patterns between southern South America and the Antarctic were investigated for U. aurantiacoatra and C. aculeata by approximate Bayesian computation (ABC). Results The two vegetative species display lower levels of genetic diversity than U. aurantiacoatra . Antarctic populations of C. aculeata and South American populations of U. aurantiacoatra display much stronger genetic differentiation than their respective counterparts on the opposite side of the Drake Passage. Usnea antarctica was not found in South America but shows comparably low levels of genetic differentiation in Antarctica as those revealed for U. aurantiacoatra . Phylogeographic histories of lichens in the region differ strongly with recent colonisation in some instances and potential in situ persistence during Last Glacial Maximum (LGM) in others. Patterns of genetic diversity indicate the ... Article in Journal/Newspaper Antarc* Antarctic Antarctica Drake Passage Usnea antarctica Wiley Online Library Antarctic Drake Passage The Antarctic Journal of Biogeography 48 7 1635 1653 |
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language |
English |
topic |
Ecology Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Ecology Ecology, Evolution, Behavior and Systematics Lagostina, Elisa Andreev, Mikhail Dal Grande, Francesco Grewe, Felix Lorenz, Aline Lumbsch, H. Thorsten Rozzi, Ricardo Ruprecht, Ulrike Sancho, Leopoldo García Søchting, Ulrik Scur, Mayara Wirtz, Nora Printzen, Christian Effects of dispersal strategy and migration history on genetic diversity and population structure of Antarctic lichens |
topic_facet |
Ecology Ecology, Evolution, Behavior and Systematics |
description |
Abstract Aim The homogenisation of historically isolated gene pools has been recognised as one of the most serious conservation problems in the Antarctic. Lichens are the dominant components of terrestrial biotas in the Antarctic and in high mountain ranges of southern South America. We study the effects of dispersal strategy and migration history on their genetic structure to better understand the importance of these processes and their interplay in shaping population structure as well as their relevance for conservation. Location Maritime Antarctic and southern South America. Methods Populations of three fruticose lichen species, Usnea aurantiacoatra , U. antarctica and Cetraria aculeata , were collected in different localities in the Maritime Antarctic and southern South America. Usnea aurantiacoatra reproduces sexually by ascospores, whereas the other two species mostly disperse asexually by symbiotic diaspores. Samples were genotyped at 8–22 microsatellite loci. Different diversity and variance metrics, Bayesian cluster analyses and Discriminant Analysis of Principal Components (DAPC) were used to study population genetic structure. Historical migration patterns between southern South America and the Antarctic were investigated for U. aurantiacoatra and C. aculeata by approximate Bayesian computation (ABC). Results The two vegetative species display lower levels of genetic diversity than U. aurantiacoatra . Antarctic populations of C. aculeata and South American populations of U. aurantiacoatra display much stronger genetic differentiation than their respective counterparts on the opposite side of the Drake Passage. Usnea antarctica was not found in South America but shows comparably low levels of genetic differentiation in Antarctica as those revealed for U. aurantiacoatra . Phylogeographic histories of lichens in the region differ strongly with recent colonisation in some instances and potential in situ persistence during Last Glacial Maximum (LGM) in others. Patterns of genetic diversity indicate the ... |
format |
Article in Journal/Newspaper |
author |
Lagostina, Elisa Andreev, Mikhail Dal Grande, Francesco Grewe, Felix Lorenz, Aline Lumbsch, H. Thorsten Rozzi, Ricardo Ruprecht, Ulrike Sancho, Leopoldo García Søchting, Ulrik Scur, Mayara Wirtz, Nora Printzen, Christian |
author_facet |
Lagostina, Elisa Andreev, Mikhail Dal Grande, Francesco Grewe, Felix Lorenz, Aline Lumbsch, H. Thorsten Rozzi, Ricardo Ruprecht, Ulrike Sancho, Leopoldo García Søchting, Ulrik Scur, Mayara Wirtz, Nora Printzen, Christian |
author_sort |
Lagostina, Elisa |
title |
Effects of dispersal strategy and migration history on genetic diversity and population structure of Antarctic lichens |
title_short |
Effects of dispersal strategy and migration history on genetic diversity and population structure of Antarctic lichens |
title_full |
Effects of dispersal strategy and migration history on genetic diversity and population structure of Antarctic lichens |
title_fullStr |
Effects of dispersal strategy and migration history on genetic diversity and population structure of Antarctic lichens |
title_full_unstemmed |
Effects of dispersal strategy and migration history on genetic diversity and population structure of Antarctic lichens |
title_sort |
effects of dispersal strategy and migration history on genetic diversity and population structure of antarctic lichens |
publisher |
Wiley |
publishDate |
2021 |
url |
http://dx.doi.org/10.1111/jbi.14101 https://onlinelibrary.wiley.com/doi/pdf/10.1111/jbi.14101 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/jbi.14101 |
geographic |
Antarctic Drake Passage The Antarctic |
geographic_facet |
Antarctic Drake Passage The Antarctic |
genre |
Antarc* Antarctic Antarctica Drake Passage Usnea antarctica |
genre_facet |
Antarc* Antarctic Antarctica Drake Passage Usnea antarctica |
op_source |
Journal of Biogeography volume 48, issue 7, page 1635-1653 ISSN 0305-0270 1365-2699 |
op_rights |
http://creativecommons.org/licenses/by-nc-nd/4.0/ |
op_doi |
https://doi.org/10.1111/jbi.14101 |
container_title |
Journal of Biogeography |
container_volume |
48 |
container_issue |
7 |
container_start_page |
1635 |
op_container_end_page |
1653 |
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1795674688325681152 |