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Distribution of genetic diversity reveals colonization patterns and philopatry of the loggerhead sea turtles across geographic scales
Understanding the processes that underlie the current distribution of genetic diversity in endangered species is a goal of modern conservation biology. Specifically, the role of colonization and dispersal events throughout a species’ evolutionary history often remains elusive. The loggerhead sea tur...
Autores principales: | , , , , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7583243/ https://www.ncbi.nlm.nih.gov/pubmed/33093463 http://dx.doi.org/10.1038/s41598-020-74141-6 |
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author | Baltazar-Soares, Miguel Klein, Juliana D. Correia, Sandra M. Reischig, Thomas Taxonera, Albert Roque, Silvana Monteiro Dos Passos, Leno Durão, Jandira Lomba, João Pina Dinis, Herculano Cameron, Sahmorie J.K. Stiebens, Victor A. Eizaguirre, Christophe |
author_facet | Baltazar-Soares, Miguel Klein, Juliana D. Correia, Sandra M. Reischig, Thomas Taxonera, Albert Roque, Silvana Monteiro Dos Passos, Leno Durão, Jandira Lomba, João Pina Dinis, Herculano Cameron, Sahmorie J.K. Stiebens, Victor A. Eizaguirre, Christophe |
author_sort | Baltazar-Soares, Miguel |
collection | PubMed |
description | Understanding the processes that underlie the current distribution of genetic diversity in endangered species is a goal of modern conservation biology. Specifically, the role of colonization and dispersal events throughout a species’ evolutionary history often remains elusive. The loggerhead sea turtle (Caretta caretta) faces multiple conservation challenges due to its migratory nature and philopatric behaviour. Here, using 4207 mtDNA sequences, we analysed the colonisation patterns and distribution of genetic diversity within a major ocean basin (the Atlantic), a regional rookery (Cabo Verde Archipelago) and a local island (Island of Boa Vista, Cabo Verde). Data analysis using hypothesis-driven population genetic models suggests the colonization of the Atlantic has occurred in two distinct waves, each corresponding to a major mtDNA lineage. We propose the oldest lineage entered the basin via the isthmus of Panama and sequentially established aggregations in Brazil, Cabo Verde and in the area of USA and Mexico. The second lineage entered the Atlantic via the Cape of Good Hope, establishing colonies in the Mediterranean Sea, and from then on, re-colonized the already existing rookeries of the Atlantic. At the Cabo Verde level, we reveal an asymmetric gene flow maintaining links across island-specific nesting groups, despite significant genetic structure. This structure stems from female philopatric behaviours, which could further be detected by weak but significant differentiation amongst beaches separated by only a few kilometres on the island of Boa Vista. Exploring biogeographic processes at diverse geographic scales improves our understanding of the complex evolutionary history of highly migratory philopatric species. Unveiling the past facilitates the design of conservation programmes targeting the right management scale to maintain a species’ evolutionary potential. |
format | Online Article Text |
id | pubmed-7583243 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-75832432020-10-27 Distribution of genetic diversity reveals colonization patterns and philopatry of the loggerhead sea turtles across geographic scales Baltazar-Soares, Miguel Klein, Juliana D. Correia, Sandra M. Reischig, Thomas Taxonera, Albert Roque, Silvana Monteiro Dos Passos, Leno Durão, Jandira Lomba, João Pina Dinis, Herculano Cameron, Sahmorie J.K. Stiebens, Victor A. Eizaguirre, Christophe Sci Rep Article Understanding the processes that underlie the current distribution of genetic diversity in endangered species is a goal of modern conservation biology. Specifically, the role of colonization and dispersal events throughout a species’ evolutionary history often remains elusive. The loggerhead sea turtle (Caretta caretta) faces multiple conservation challenges due to its migratory nature and philopatric behaviour. Here, using 4207 mtDNA sequences, we analysed the colonisation patterns and distribution of genetic diversity within a major ocean basin (the Atlantic), a regional rookery (Cabo Verde Archipelago) and a local island (Island of Boa Vista, Cabo Verde). Data analysis using hypothesis-driven population genetic models suggests the colonization of the Atlantic has occurred in two distinct waves, each corresponding to a major mtDNA lineage. We propose the oldest lineage entered the basin via the isthmus of Panama and sequentially established aggregations in Brazil, Cabo Verde and in the area of USA and Mexico. The second lineage entered the Atlantic via the Cape of Good Hope, establishing colonies in the Mediterranean Sea, and from then on, re-colonized the already existing rookeries of the Atlantic. At the Cabo Verde level, we reveal an asymmetric gene flow maintaining links across island-specific nesting groups, despite significant genetic structure. This structure stems from female philopatric behaviours, which could further be detected by weak but significant differentiation amongst beaches separated by only a few kilometres on the island of Boa Vista. Exploring biogeographic processes at diverse geographic scales improves our understanding of the complex evolutionary history of highly migratory philopatric species. Unveiling the past facilitates the design of conservation programmes targeting the right management scale to maintain a species’ evolutionary potential. Nature Publishing Group UK 2020-10-22 /pmc/articles/PMC7583243/ /pubmed/33093463 http://dx.doi.org/10.1038/s41598-020-74141-6 Text en © The Author(s) 2020 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/. |
spellingShingle | Article Baltazar-Soares, Miguel Klein, Juliana D. Correia, Sandra M. Reischig, Thomas Taxonera, Albert Roque, Silvana Monteiro Dos Passos, Leno Durão, Jandira Lomba, João Pina Dinis, Herculano Cameron, Sahmorie J.K. Stiebens, Victor A. Eizaguirre, Christophe Distribution of genetic diversity reveals colonization patterns and philopatry of the loggerhead sea turtles across geographic scales |
title | Distribution of genetic diversity reveals colonization patterns and philopatry of the loggerhead sea turtles across geographic scales |
title_full | Distribution of genetic diversity reveals colonization patterns and philopatry of the loggerhead sea turtles across geographic scales |
title_fullStr | Distribution of genetic diversity reveals colonization patterns and philopatry of the loggerhead sea turtles across geographic scales |
title_full_unstemmed | Distribution of genetic diversity reveals colonization patterns and philopatry of the loggerhead sea turtles across geographic scales |
title_short | Distribution of genetic diversity reveals colonization patterns and philopatry of the loggerhead sea turtles across geographic scales |
title_sort | distribution of genetic diversity reveals colonization patterns and philopatry of the loggerhead sea turtles across geographic scales |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7583243/ https://www.ncbi.nlm.nih.gov/pubmed/33093463 http://dx.doi.org/10.1038/s41598-020-74141-6 |
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