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COI sequences of Ophiontous victoriae and O. hexactis

Assembled and aligned COI sequences of Ophiontous victoriae and O. hexactis

[Abstract: Related publication]: The drivers behind evolutionary innovations such as contrasting life histories and morphological change are central questions of evolutionary biology. However, the environmental and ecological contexts linked to evolutionary innovations are generally unclear. During the Pleistocene glacial cycles, grounded ice sheets expanded across the Southern Ocean continental shelf. Limited ice-free areas remained, and fauna were isolated from other refugial populations. Survival in Southern Ocean refugia could present opportunities for ecological adaptation and evolutionary innovation. Here, we reconstructed the phylogeographic patterns of circum-Antarctic brittle stars Ophionotus victoriae and O. hexactis with contrasting life histories (broadcasting vs brooding) and morphology (5 vs 6 arms). We examined the evolutionary relationship between the two species using cytochrome c oxidase subunit I (COI) data. COI data suggested that O. victoriae is a single species (rather than a species complex) and is closely related to O. hexactis (a separate species). Since their recent divergence in the mid-Pleistocene, O. victoriae and O. hexactis likely persisted differently throughout glacial maxima, in deep-sea and Antarctic island refugia, respectively. Genetic connectivity, within and between the Antarctic continental shelf and islands, was also observed and could be linked to the Antarctic Circumpolar Current and local oceanographic regimes. Signatures of a probable seascape corridor linking connectivity between the Scotia Sea and Prydz Bay are also highlighted. We suggest that survival in Antarctic island refugia was associated with increase in arm number and a switch from broadcast spawning to brooding in O. hexactis, and propose that it could be linked to environmental changes (such as salinity) associated with intensified interglacial-glacial cycles.

Software/equipment used to create/collect the data: Sanger sequencing 

Software/equipment used to manipulate/analyse the data: Geneious v10.2.4 for sequence assembly and alignment

The full methods including Sections 2.1 (Sample collection) and 2.2 ( Molecular sequencing) are available in the Open Access publication from the Related publications link below.
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    Data Record Details
    Data record related to this publication COI sequences of Ophiontous victoriae and O. hexactis
    Data Publication title COI sequences of Ophiontous victoriae and O. hexactis
  • Description

    Assembled and aligned COI sequences of Ophiontous victoriae and O. hexactis

    [Abstract: Related publication]: The drivers behind evolutionary innovations such as contrasting life histories and morphological change are central questions of evolutionary biology. However, the environmental and ecological contexts linked to evolutionary innovations are generally unclear. During the Pleistocene glacial cycles, grounded ice sheets expanded across the Southern Ocean continental shelf. Limited ice-free areas remained, and fauna were isolated from other refugial populations. Survival in Southern Ocean refugia could present opportunities for ecological adaptation and evolutionary innovation. Here, we reconstructed the phylogeographic patterns of circum-Antarctic brittle stars Ophionotus victoriae and O. hexactis with contrasting life histories (broadcasting vs brooding) and morphology (5 vs 6 arms). We examined the evolutionary relationship between the two species using cytochrome c oxidase subunit I (COI) data. COI data suggested that O. victoriae is a single species (rather than a species complex) and is closely related to O. hexactis (a separate species). Since their recent divergence in the mid-Pleistocene, O. victoriae and O. hexactis likely persisted differently throughout glacial maxima, in deep-sea and Antarctic island refugia, respectively. Genetic connectivity, within and between the Antarctic continental shelf and islands, was also observed and could be linked to the Antarctic Circumpolar Current and local oceanographic regimes. Signatures of a probable seascape corridor linking connectivity between the Scotia Sea and Prydz Bay are also highlighted. We suggest that survival in Antarctic island refugia was associated with increase in arm number and a switch from broadcast spawning to brooding in O. hexactis, and propose that it could be linked to environmental changes (such as salinity) associated with intensified interglacial-glacial cycles.

    Software/equipment used to create/collect the data: Sanger sequencing 

    Software/equipment used to manipulate/analyse the data: Geneious v10.2.4 for sequence assembly and alignment

    The full methods including Sections 2.1 (Sample collection) and 2.2 ( Molecular sequencing) are available in the Open Access publication from the Related publications link below.

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    • Descriptor
      • Descriptor type
    • Data type dataset
  • Keywords
    • contrasting life histories
    • evolutionary innovations
    • glacial refugia
    • morphological innovation
    • population genetics
  • Funding source
    • National Science Foundation (USA) Office of Polar Programs (award 1043749)
    • Antarctic Circumnavigation Expedition (carried out by the Swiss Polar Institute, supported by the ACE Foundation and Ferring Pharmaceuticals)
    • Australian Research Council Discovery grant (DP190101347)
    • Thomas Davies Research grant (Australian Academy of Science)
    • David Pearse bequest
    • Antarctic PhD student support grant (Antarctic Science Foundation)
    • ARC SRIEAS Grant SR200100005 Securing Antarctica’s Environmental Future
  • Research grant(s)/Scheme name(s)
    • 24850 - Dating West Antarctic ice sheet collapse using molecular sequence data
    • 23048 - Dating the collapse of the West Antarctic ice sheet using next generation sequencing of marine invertebrates
    • Research themes
    Tropical Ecosystems, Conservation and Climate Change
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    Data Locations

    Type Location Notes
    URL https://www.ncbi.nlm.nih.gov/nuccore/?term=MZ543435%3AMZ543949%5Baccn%5D COI sequences deposited to GenBank at NCBI under accession numbers MZ543435—MZ543949
    The Data Manager is: Jan Strugnell
    College or Centre College of Science & Engineering
    Access conditions Open: free access under license
  • Alternative access conditions
    • Data record size 515 sequences
- Related resources
  • Related publications
      Name Lau, Sally C.Y., Strugnell, Jan M., Sands, Chester J., Silva, Catarina N.S., and Wilson, Nerida G. (2021) Evolutionary innovations in Antarctic brittle stars linked to glacial refugia. Ecology and Evolution, 11 (23). pp. 17428-17446.
    • URL https://doi.org/10.1002/ece3.8376
    • Notes Open Access
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    • Statement of rights in data NCBI places no restrictions on the use or distribution of data
  • Data owners
      James Cook University
- Citation
    Citation Lau, Cheuk Ying; Strugnell, Jan (2022): COI sequences of Ophiontous victoriae and O. hexactis. James Cook University. https://research.jcu.edu.au/data/published/565c5240a00e11ecadc7cd125c4cc081