Effects of contrasting tidal habitats on growth, suvivorship and dispersal in an intertidal snail

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    Abstract

    We examined size-frequency distributions, growth rates, sizes of mating snails, dispersal and genetics in populations of the littorine Bembicium vittatum Philippi in two connected, but very different tidal ponds on Long Island, in the Houtman Abrolhos Islands, Western Australia. At one extreme, the "wet pond", snails are inundated by the tide each day. At the other extreme, the "dry pond", snails are at a higher tidal elevation, and are thus inundated only during spring tides, with intervening dry periods of up to 7 weeks. Snails in the wet pond are significantly larger,;row faster, and disperse more than those in the dry pond. Nevertheless, abundance and survivorship are higher in the dry pond, indicating a significant tradeoff of size and growth with survivorship. Reciprocal transplant experiments indicate that growth rate is a function of habitat: wet-pond snails grow faster than dry-pond conspecifics. Von Bertalanffy growth rate curves indicate that wet pond snails mature earlier and at a larger size than dry pond snails, indicating that differences in the size of mating snails are due to differences in growth rate. Measured rates of dispersal indicate that the wet pond, which is about 100 m long, is a single genetic neighbourhood. Genetic comparisons at four polymorphic allozyme loci support the interpretation of genetic mixing throughout the wet pond. Despite mixing over large distances in the wet pond, no movements were detected through the 20 m channel that connects the wet and dry ponds, and genetic comparisons confirmed isolation of the two populations. This study highlights the substantial ecological plasticity of B. vittatum, allowing persistence in a wide range of habitats. (C) 2008 Elsevier B.V. All rights reserved.
    Original languageEnglish
    Pages (from-to)96-103
    JournalJournal of Experimental Marine Biology and Ecology
    Volume363
    DOIs
    Publication statusPublished - 2008

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    snail
    snails
    pond
    habitat
    habitats
    effect
    survivorship
    tides
    tide
    survival rate
    allozyme
    allozymes
    Western Australia
    plasticity
    population genetics
    persistence

    Cite this

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    title = "Effects of contrasting tidal habitats on growth, suvivorship and dispersal in an intertidal snail",
    abstract = "We examined size-frequency distributions, growth rates, sizes of mating snails, dispersal and genetics in populations of the littorine Bembicium vittatum Philippi in two connected, but very different tidal ponds on Long Island, in the Houtman Abrolhos Islands, Western Australia. At one extreme, the {"}wet pond{"}, snails are inundated by the tide each day. At the other extreme, the {"}dry pond{"}, snails are at a higher tidal elevation, and are thus inundated only during spring tides, with intervening dry periods of up to 7 weeks. Snails in the wet pond are significantly larger,;row faster, and disperse more than those in the dry pond. Nevertheless, abundance and survivorship are higher in the dry pond, indicating a significant tradeoff of size and growth with survivorship. Reciprocal transplant experiments indicate that growth rate is a function of habitat: wet-pond snails grow faster than dry-pond conspecifics. Von Bertalanffy growth rate curves indicate that wet pond snails mature earlier and at a larger size than dry pond snails, indicating that differences in the size of mating snails are due to differences in growth rate. Measured rates of dispersal indicate that the wet pond, which is about 100 m long, is a single genetic neighbourhood. Genetic comparisons at four polymorphic allozyme loci support the interpretation of genetic mixing throughout the wet pond. Despite mixing over large distances in the wet pond, no movements were detected through the 20 m channel that connects the wet and dry ponds, and genetic comparisons confirmed isolation of the two populations. This study highlights the substantial ecological plasticity of B. vittatum, allowing persistence in a wide range of habitats. (C) 2008 Elsevier B.V. All rights reserved.",
    author = "Michael Johnson and Robert Black",
    year = "2008",
    doi = "10.1016/j.jembe.2008.06.021",
    language = "English",
    volume = "363",
    pages = "96--103",
    journal = "Journal of Experimental Marine Biology and Ecology",
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    TY - JOUR

    T1 - Effects of contrasting tidal habitats on growth, suvivorship and dispersal in an intertidal snail

    AU - Johnson, Michael

    AU - Black, Robert

    PY - 2008

    Y1 - 2008

    N2 - We examined size-frequency distributions, growth rates, sizes of mating snails, dispersal and genetics in populations of the littorine Bembicium vittatum Philippi in two connected, but very different tidal ponds on Long Island, in the Houtman Abrolhos Islands, Western Australia. At one extreme, the "wet pond", snails are inundated by the tide each day. At the other extreme, the "dry pond", snails are at a higher tidal elevation, and are thus inundated only during spring tides, with intervening dry periods of up to 7 weeks. Snails in the wet pond are significantly larger,;row faster, and disperse more than those in the dry pond. Nevertheless, abundance and survivorship are higher in the dry pond, indicating a significant tradeoff of size and growth with survivorship. Reciprocal transplant experiments indicate that growth rate is a function of habitat: wet-pond snails grow faster than dry-pond conspecifics. Von Bertalanffy growth rate curves indicate that wet pond snails mature earlier and at a larger size than dry pond snails, indicating that differences in the size of mating snails are due to differences in growth rate. Measured rates of dispersal indicate that the wet pond, which is about 100 m long, is a single genetic neighbourhood. Genetic comparisons at four polymorphic allozyme loci support the interpretation of genetic mixing throughout the wet pond. Despite mixing over large distances in the wet pond, no movements were detected through the 20 m channel that connects the wet and dry ponds, and genetic comparisons confirmed isolation of the two populations. This study highlights the substantial ecological plasticity of B. vittatum, allowing persistence in a wide range of habitats. (C) 2008 Elsevier B.V. All rights reserved.

    AB - We examined size-frequency distributions, growth rates, sizes of mating snails, dispersal and genetics in populations of the littorine Bembicium vittatum Philippi in two connected, but very different tidal ponds on Long Island, in the Houtman Abrolhos Islands, Western Australia. At one extreme, the "wet pond", snails are inundated by the tide each day. At the other extreme, the "dry pond", snails are at a higher tidal elevation, and are thus inundated only during spring tides, with intervening dry periods of up to 7 weeks. Snails in the wet pond are significantly larger,;row faster, and disperse more than those in the dry pond. Nevertheless, abundance and survivorship are higher in the dry pond, indicating a significant tradeoff of size and growth with survivorship. Reciprocal transplant experiments indicate that growth rate is a function of habitat: wet-pond snails grow faster than dry-pond conspecifics. Von Bertalanffy growth rate curves indicate that wet pond snails mature earlier and at a larger size than dry pond snails, indicating that differences in the size of mating snails are due to differences in growth rate. Measured rates of dispersal indicate that the wet pond, which is about 100 m long, is a single genetic neighbourhood. Genetic comparisons at four polymorphic allozyme loci support the interpretation of genetic mixing throughout the wet pond. Despite mixing over large distances in the wet pond, no movements were detected through the 20 m channel that connects the wet and dry ponds, and genetic comparisons confirmed isolation of the two populations. This study highlights the substantial ecological plasticity of B. vittatum, allowing persistence in a wide range of habitats. (C) 2008 Elsevier B.V. All rights reserved.

    U2 - 10.1016/j.jembe.2008.06.021

    DO - 10.1016/j.jembe.2008.06.021

    M3 - Article

    VL - 363

    SP - 96

    EP - 103

    JO - Journal of Experimental Marine Biology and Ecology

    JF - Journal of Experimental Marine Biology and Ecology

    SN - 0022-0981

    ER -