Ecological opportunity shapes a large Arctic charr species radiation
Ecological opportunity is considered a crucial factor for adaptive radiation. Here, we combine genetic, morphological and ecological data to assess species and ecomorphological diversity of Artic charr in six lakes of a catchment in southernmost Greenland, where only charr and stickleback occur. Bec...
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ftdatacite:10.7892/boris.134234 2023-05-15T14:30:03+02:00 Ecological opportunity shapes a large Arctic charr species radiation Dönz, Carmela J. Krähenbühl, Andrin K. Walker, Jonas Seehausen, Ole Brodersen, Jakob 2019 application/pdf https://dx.doi.org/10.7892/boris.134234 https://boris.unibe.ch/134234/ en eng Royal Society of London info:eu-repo/semantics/restrictedAccess 570 Life sciences; biology Text article-journal ScholarlyArticle 2019 ftdatacite https://doi.org/10.7892/boris.134234 2021-11-05T12:55:41Z Ecological opportunity is considered a crucial factor for adaptive radiation. Here, we combine genetic, morphological and ecological data to assess species and ecomorphological diversity of Artic charr in six lakes of a catchment in southernmost Greenland, where only charr and stickleback occur. Because the diversity of habitats and resources increases with lake size, we predict a positive association between lake size and the extent of ecomorphological diversity. The largest lake of the catchment harbours the largest Arctic charr assemblage known today. It consists of six genetically differentiated species belonging to five ecomorphs (anadromous, littoral benthic, profundal dwarf, planktivorous, piscivorous), of which the latter comprises two ecomorphologically extremely similar species. Lakes of intermediate size contain two ecomorphologically and genetically distinct species. Small lakes harbour one genetically homogeneous, yet sometimes ecomorphologically variable population. Supporting our prediction, lake size is positively correlated with the extent of ecomorphological specialization towards profundal, pelagic and piscivorous lifestyle. Furthermore, assemblagewide morphospace increases sharply when more than one genetic cluster is present. Our data suggest that ecological opportunity and speciation jointly determine phenotypic expansion in this charr radiation. Text Arctic charr Arctic Greenland DataCite Metadata Store (German National Library of Science and Technology) Arctic Greenland |
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DataCite Metadata Store (German National Library of Science and Technology) |
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English |
topic |
570 Life sciences; biology |
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570 Life sciences; biology Dönz, Carmela J. Krähenbühl, Andrin K. Walker, Jonas Seehausen, Ole Brodersen, Jakob Ecological opportunity shapes a large Arctic charr species radiation |
topic_facet |
570 Life sciences; biology |
description |
Ecological opportunity is considered a crucial factor for adaptive radiation. Here, we combine genetic, morphological and ecological data to assess species and ecomorphological diversity of Artic charr in six lakes of a catchment in southernmost Greenland, where only charr and stickleback occur. Because the diversity of habitats and resources increases with lake size, we predict a positive association between lake size and the extent of ecomorphological diversity. The largest lake of the catchment harbours the largest Arctic charr assemblage known today. It consists of six genetically differentiated species belonging to five ecomorphs (anadromous, littoral benthic, profundal dwarf, planktivorous, piscivorous), of which the latter comprises two ecomorphologically extremely similar species. Lakes of intermediate size contain two ecomorphologically and genetically distinct species. Small lakes harbour one genetically homogeneous, yet sometimes ecomorphologically variable population. Supporting our prediction, lake size is positively correlated with the extent of ecomorphological specialization towards profundal, pelagic and piscivorous lifestyle. Furthermore, assemblagewide morphospace increases sharply when more than one genetic cluster is present. Our data suggest that ecological opportunity and speciation jointly determine phenotypic expansion in this charr radiation. |
format |
Text |
author |
Dönz, Carmela J. Krähenbühl, Andrin K. Walker, Jonas Seehausen, Ole Brodersen, Jakob |
author_facet |
Dönz, Carmela J. Krähenbühl, Andrin K. Walker, Jonas Seehausen, Ole Brodersen, Jakob |
author_sort |
Dönz, Carmela J. |
title |
Ecological opportunity shapes a large Arctic charr species radiation |
title_short |
Ecological opportunity shapes a large Arctic charr species radiation |
title_full |
Ecological opportunity shapes a large Arctic charr species radiation |
title_fullStr |
Ecological opportunity shapes a large Arctic charr species radiation |
title_full_unstemmed |
Ecological opportunity shapes a large Arctic charr species radiation |
title_sort |
ecological opportunity shapes a large arctic charr species radiation |
publisher |
Royal Society of London |
publishDate |
2019 |
url |
https://dx.doi.org/10.7892/boris.134234 https://boris.unibe.ch/134234/ |
geographic |
Arctic Greenland |
geographic_facet |
Arctic Greenland |
genre |
Arctic charr Arctic Greenland |
genre_facet |
Arctic charr Arctic Greenland |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.7892/boris.134234 |
_version_ |
1766303977798893568 |