Cryptic diversity in smooth-shelled mussels on Southern Ocean islands: connectivity, hybridisation and a marine invasion
Abstract Background Large numbers of endemic species inhabit subantarctic continental coasts and islands that are characterised by highly variable environmental conditions. Southern hemisphere populations of taxa that are morphologically similar to northern counterparts have traditionally been consi...
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ftdatacite:10.6084/m9.figshare.c.4609766 2023-05-15T15:33:43+02:00 Cryptic diversity in smooth-shelled mussels on Southern Ocean islands: connectivity, hybridisation and a marine invasion Małgorzata Zbawicka Gardner, Jonathan Wenne, Roman 2019 https://dx.doi.org/10.6084/m9.figshare.c.4609766 https://springernature.figshare.com/collections/Cryptic_diversity_in_smooth-shelled_mussels_on_Southern_Ocean_islands_connectivity_hybridisation_and_a_marine_invasion/4609766 unknown Figshare https://dx.doi.org/10.1186/s12983-019-0332-y CC BY 4.0 https://creativecommons.org/licenses/by/4.0 CC-BY Microbiology FOS Biological sciences Genetics Evolutionary Biology 59999 Environmental Sciences not elsewhere classified FOS Earth and related environmental sciences Ecology Marine Biology Inorganic Chemistry FOS Chemical sciences Collection article 2019 ftdatacite https://doi.org/10.6084/m9.figshare.c.4609766 https://doi.org/10.1186/s12983-019-0332-y 2021-11-05T12:55:41Z Abstract Background Large numbers of endemic species inhabit subantarctic continental coasts and islands that are characterised by highly variable environmental conditions. Southern hemisphere populations of taxa that are morphologically similar to northern counterparts have traditionally been considered to be extensions of such Northern hemisphere taxa, and may not exhibit differentiation amongst geographically isolated populations in the Southern Ocean. Smooth-shelled blue mussels of the genus Mytilus that exhibit an anti-tropical distribution are a model group to study phylogeography, speciation and hybridisation in the sea, and contribute to the theory and practice of marine biosecurity. Methods We used a single nucleotide polymorphism (SNPs) panel that has the ability to accurately identify reference Northern and Southern hemisphere Mytilus taxa to test for evolutionary differentiation amongst native Southern Ocean island populations. Results Native mussels from the Falkland Islands and the Kerguelen Islands exhibited greatest affinity to native M. platensis d’Orbigny 1846 from the Atlantic coast of South America. The major Southern Ocean current flow from west to east is likely to explain the spreading of M. platensis to remote offshore islands, as adults via the process of rafting or perhaps directly as larvae. SNPs variation revealed that mussels from Tasmania were native and clearly differentiated from all other blue mussel groups in the Southern and Northern hemispheres. The native mussels M. planulatus from Tasmania and from mainland New Zealand (NZ), and tentatively M. aoteanus from the two NZ Southern Ocean offshore island groups (the Auckland Islands and Campbell Island), formed a distinct M. galloprovincialis–like Southern hemisphere group with closest affinity to Northern hemisphere M. galloprovincialis from the Mediterranean Sea. In all cases, the SNPs revealed evidence of hybridisation between two or more distinct taxa. The invasive Northern hemisphere M. galloprovincialis was identified only in Tasmania, amongst native mussels of a distinct Australian M. planulatus lineage. Conclusion Overall, our results reveal that Southern hemisphere island mussels have mixed genome ancestry and are native, not introduced by human activities. The preservation of distinct evolutionary lineages of Southern hemisphere species needs to be an ongoing focus of conservation efforts, given that population sizes on some of the remote offshore oceanic islands will be small and may be more easily adversely affected by invasion and subsequent hybridisation and introgression than larger populations elsewhere. Article in Journal/Newspaper Auckland Islands Kerguelen Islands Southern Ocean Ocean Island DataCite Metadata Store (German National Library of Science and Technology) Southern Ocean Kerguelen Kerguelen Islands New Zealand Campbell Island ENVELOPE(169.500,169.500,-52.500,-52.500) |
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Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
unknown |
topic |
Microbiology FOS Biological sciences Genetics Evolutionary Biology 59999 Environmental Sciences not elsewhere classified FOS Earth and related environmental sciences Ecology Marine Biology Inorganic Chemistry FOS Chemical sciences |
spellingShingle |
Microbiology FOS Biological sciences Genetics Evolutionary Biology 59999 Environmental Sciences not elsewhere classified FOS Earth and related environmental sciences Ecology Marine Biology Inorganic Chemistry FOS Chemical sciences Małgorzata Zbawicka Gardner, Jonathan Wenne, Roman Cryptic diversity in smooth-shelled mussels on Southern Ocean islands: connectivity, hybridisation and a marine invasion |
topic_facet |
Microbiology FOS Biological sciences Genetics Evolutionary Biology 59999 Environmental Sciences not elsewhere classified FOS Earth and related environmental sciences Ecology Marine Biology Inorganic Chemistry FOS Chemical sciences |
description |
Abstract Background Large numbers of endemic species inhabit subantarctic continental coasts and islands that are characterised by highly variable environmental conditions. Southern hemisphere populations of taxa that are morphologically similar to northern counterparts have traditionally been considered to be extensions of such Northern hemisphere taxa, and may not exhibit differentiation amongst geographically isolated populations in the Southern Ocean. Smooth-shelled blue mussels of the genus Mytilus that exhibit an anti-tropical distribution are a model group to study phylogeography, speciation and hybridisation in the sea, and contribute to the theory and practice of marine biosecurity. Methods We used a single nucleotide polymorphism (SNPs) panel that has the ability to accurately identify reference Northern and Southern hemisphere Mytilus taxa to test for evolutionary differentiation amongst native Southern Ocean island populations. Results Native mussels from the Falkland Islands and the Kerguelen Islands exhibited greatest affinity to native M. platensis d’Orbigny 1846 from the Atlantic coast of South America. The major Southern Ocean current flow from west to east is likely to explain the spreading of M. platensis to remote offshore islands, as adults via the process of rafting or perhaps directly as larvae. SNPs variation revealed that mussels from Tasmania were native and clearly differentiated from all other blue mussel groups in the Southern and Northern hemispheres. The native mussels M. planulatus from Tasmania and from mainland New Zealand (NZ), and tentatively M. aoteanus from the two NZ Southern Ocean offshore island groups (the Auckland Islands and Campbell Island), formed a distinct M. galloprovincialis–like Southern hemisphere group with closest affinity to Northern hemisphere M. galloprovincialis from the Mediterranean Sea. In all cases, the SNPs revealed evidence of hybridisation between two or more distinct taxa. The invasive Northern hemisphere M. galloprovincialis was identified only in Tasmania, amongst native mussels of a distinct Australian M. planulatus lineage. Conclusion Overall, our results reveal that Southern hemisphere island mussels have mixed genome ancestry and are native, not introduced by human activities. The preservation of distinct evolutionary lineages of Southern hemisphere species needs to be an ongoing focus of conservation efforts, given that population sizes on some of the remote offshore oceanic islands will be small and may be more easily adversely affected by invasion and subsequent hybridisation and introgression than larger populations elsewhere. |
format |
Article in Journal/Newspaper |
author |
Małgorzata Zbawicka Gardner, Jonathan Wenne, Roman |
author_facet |
Małgorzata Zbawicka Gardner, Jonathan Wenne, Roman |
author_sort |
Małgorzata Zbawicka |
title |
Cryptic diversity in smooth-shelled mussels on Southern Ocean islands: connectivity, hybridisation and a marine invasion |
title_short |
Cryptic diversity in smooth-shelled mussels on Southern Ocean islands: connectivity, hybridisation and a marine invasion |
title_full |
Cryptic diversity in smooth-shelled mussels on Southern Ocean islands: connectivity, hybridisation and a marine invasion |
title_fullStr |
Cryptic diversity in smooth-shelled mussels on Southern Ocean islands: connectivity, hybridisation and a marine invasion |
title_full_unstemmed |
Cryptic diversity in smooth-shelled mussels on Southern Ocean islands: connectivity, hybridisation and a marine invasion |
title_sort |
cryptic diversity in smooth-shelled mussels on southern ocean islands: connectivity, hybridisation and a marine invasion |
publisher |
Figshare |
publishDate |
2019 |
url |
https://dx.doi.org/10.6084/m9.figshare.c.4609766 https://springernature.figshare.com/collections/Cryptic_diversity_in_smooth-shelled_mussels_on_Southern_Ocean_islands_connectivity_hybridisation_and_a_marine_invasion/4609766 |
long_lat |
ENVELOPE(169.500,169.500,-52.500,-52.500) |
geographic |
Southern Ocean Kerguelen Kerguelen Islands New Zealand Campbell Island |
geographic_facet |
Southern Ocean Kerguelen Kerguelen Islands New Zealand Campbell Island |
genre |
Auckland Islands Kerguelen Islands Southern Ocean Ocean Island |
genre_facet |
Auckland Islands Kerguelen Islands Southern Ocean Ocean Island |
op_relation |
https://dx.doi.org/10.1186/s12983-019-0332-y |
op_rights |
CC BY 4.0 https://creativecommons.org/licenses/by/4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.6084/m9.figshare.c.4609766 https://doi.org/10.1186/s12983-019-0332-y |
_version_ |
1766364238968782848 |