A low‐latitude species pump: Peripheral isolation, parapatric speciation and mating‐system evolution converge in a marine radiation
Abstract Geologically recent radiations can shed light on speciation processes, but incomplete lineage sorting and introgressive gene flow render accurate evolutionary reconstruction and interpretation challenging. Independently evolving metapopulations of low dispersal taxa may provide an additiona...
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Online Access: | http://dx.doi.org/10.1111/mec.16623 https://onlinelibrary.wiley.com/doi/pdf/10.1111/mec.16623 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/mec.16623 |
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crwiley:10.1111/mec.16623 2024-05-19T07:45:23+00:00 A low‐latitude species pump: Peripheral isolation, parapatric speciation and mating‐system evolution converge in a marine radiation Almeida, Susana C. Neiva, João Sousa, Filipe Martins, Neusa Cox, Cymon J. Melo‐Ferreira, José Guiry, Michael D. Serrão, Ester A. Pearson, Gareth A. BiodivERsA European Regional Development Fund Fundação para a Ciência e a Tecnologia Pew Charitable Trusts 2022 http://dx.doi.org/10.1111/mec.16623 https://onlinelibrary.wiley.com/doi/pdf/10.1111/mec.16623 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/mec.16623 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Molecular Ecology volume 31, issue 18, page 4797-4817 ISSN 0962-1083 1365-294X Genetics Ecology, Evolution, Behavior and Systematics journal-article 2022 crwiley https://doi.org/10.1111/mec.16623 2024-04-22T07:32:07Z Abstract Geologically recent radiations can shed light on speciation processes, but incomplete lineage sorting and introgressive gene flow render accurate evolutionary reconstruction and interpretation challenging. Independently evolving metapopulations of low dispersal taxa may provide an additional level of phylogeographic information, given sufficiently broad sampling and genome‐wide sequencing. Evolution in the marine brown algal genus Fucus in the south‐eastern North Atlantic was shaped by Quaternary climate‐driven range shifts. Over this timescale, divergence and speciation occurred against a background of expansion‐contraction cycles from multiple refugia, together with mating‐system shifts from outcrossing (dioecy) to selfing hermaphroditism. We tested the hypothesis that peripheral isolation of range edge (dioecious) F. vesiculosus led to parapatric speciation and radiation of hermaphrodite lineages. Species tree methods using 876 single‐copy nuclear genes and extensive geographic coverage produced conflicting topologies with respect to geographic clades of F. vesiculosus . All methods, however, revealed a new and early diverging hermaphrodite species, Fucus macroguiryi sp. nov. Both the multispecies coalescent and polymorphism‐aware models (in contrast to concatenation) support sequential paraphyly in F. vesiculosus resulting from distinct evolutionary processes. Our results support (1) peripheral isolation of the southern F. vesiculosus clade prior to parapatric speciation and radiation of hermaphrodite lineages‐a “low‐latitude species pump”. (2) Directional introgressive gene flow into F. vesiculosus around the present‐day secondary contact zone (sympatric‐allopatric boundary) between dioecious/hermaphrodite lineages as hermaphrodites expanded northwards, supported by concordance analysis and statistical tests of introgression. (3) Species boundaries in the extensive sympatric range are probably maintained by reproductive system (selfing in hermaphrodites) and reinforcement. Article in Journal/Newspaper North Atlantic Wiley Online Library Molecular Ecology 31 18 4797 4817 |
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collection |
Wiley Online Library |
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crwiley |
language |
English |
topic |
Genetics Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Genetics Ecology, Evolution, Behavior and Systematics Almeida, Susana C. Neiva, João Sousa, Filipe Martins, Neusa Cox, Cymon J. Melo‐Ferreira, José Guiry, Michael D. Serrão, Ester A. Pearson, Gareth A. A low‐latitude species pump: Peripheral isolation, parapatric speciation and mating‐system evolution converge in a marine radiation |
topic_facet |
Genetics Ecology, Evolution, Behavior and Systematics |
description |
Abstract Geologically recent radiations can shed light on speciation processes, but incomplete lineage sorting and introgressive gene flow render accurate evolutionary reconstruction and interpretation challenging. Independently evolving metapopulations of low dispersal taxa may provide an additional level of phylogeographic information, given sufficiently broad sampling and genome‐wide sequencing. Evolution in the marine brown algal genus Fucus in the south‐eastern North Atlantic was shaped by Quaternary climate‐driven range shifts. Over this timescale, divergence and speciation occurred against a background of expansion‐contraction cycles from multiple refugia, together with mating‐system shifts from outcrossing (dioecy) to selfing hermaphroditism. We tested the hypothesis that peripheral isolation of range edge (dioecious) F. vesiculosus led to parapatric speciation and radiation of hermaphrodite lineages. Species tree methods using 876 single‐copy nuclear genes and extensive geographic coverage produced conflicting topologies with respect to geographic clades of F. vesiculosus . All methods, however, revealed a new and early diverging hermaphrodite species, Fucus macroguiryi sp. nov. Both the multispecies coalescent and polymorphism‐aware models (in contrast to concatenation) support sequential paraphyly in F. vesiculosus resulting from distinct evolutionary processes. Our results support (1) peripheral isolation of the southern F. vesiculosus clade prior to parapatric speciation and radiation of hermaphrodite lineages‐a “low‐latitude species pump”. (2) Directional introgressive gene flow into F. vesiculosus around the present‐day secondary contact zone (sympatric‐allopatric boundary) between dioecious/hermaphrodite lineages as hermaphrodites expanded northwards, supported by concordance analysis and statistical tests of introgression. (3) Species boundaries in the extensive sympatric range are probably maintained by reproductive system (selfing in hermaphrodites) and reinforcement. |
author2 |
BiodivERsA European Regional Development Fund Fundação para a Ciência e a Tecnologia Pew Charitable Trusts |
format |
Article in Journal/Newspaper |
author |
Almeida, Susana C. Neiva, João Sousa, Filipe Martins, Neusa Cox, Cymon J. Melo‐Ferreira, José Guiry, Michael D. Serrão, Ester A. Pearson, Gareth A. |
author_facet |
Almeida, Susana C. Neiva, João Sousa, Filipe Martins, Neusa Cox, Cymon J. Melo‐Ferreira, José Guiry, Michael D. Serrão, Ester A. Pearson, Gareth A. |
author_sort |
Almeida, Susana C. |
title |
A low‐latitude species pump: Peripheral isolation, parapatric speciation and mating‐system evolution converge in a marine radiation |
title_short |
A low‐latitude species pump: Peripheral isolation, parapatric speciation and mating‐system evolution converge in a marine radiation |
title_full |
A low‐latitude species pump: Peripheral isolation, parapatric speciation and mating‐system evolution converge in a marine radiation |
title_fullStr |
A low‐latitude species pump: Peripheral isolation, parapatric speciation and mating‐system evolution converge in a marine radiation |
title_full_unstemmed |
A low‐latitude species pump: Peripheral isolation, parapatric speciation and mating‐system evolution converge in a marine radiation |
title_sort |
low‐latitude species pump: peripheral isolation, parapatric speciation and mating‐system evolution converge in a marine radiation |
publisher |
Wiley |
publishDate |
2022 |
url |
http://dx.doi.org/10.1111/mec.16623 https://onlinelibrary.wiley.com/doi/pdf/10.1111/mec.16623 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/mec.16623 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Molecular Ecology volume 31, issue 18, page 4797-4817 ISSN 0962-1083 1365-294X |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/mec.16623 |
container_title |
Molecular Ecology |
container_volume |
31 |
container_issue |
18 |
container_start_page |
4797 |
op_container_end_page |
4817 |
_version_ |
1799485419004362752 |