How do climate-linked sex ratios and dispersal limit range boundaries?

Maria Boyle, Lisa Schwanz, Jim HONE, Arthur GEORGES

    Research output: Contribution to journalArticle

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    Abstract

    Background: Geographic ranges of ectotherms such as reptiles may be determined strongly by abiotic factors owing to causal links between ambient temperature, juvenile survival and individual sex (male or female). Unfortunately, we know little of how these factors interact with dispersal among populations across a species range. We used a simulation model to examine the effects of dispersal, temperature-dependent juvenile survival and sex determining mechanism (temperature-dependent sex determination (TSD) and genotypic sex determination (GSD)) and their interactions, on range limits in populations extending across a continuous range of air temperatures. In particular, we examined the relative importance of these parameters for population persistence to recommend targets for future empirical research.Results: Dispersal influenced the range limits of species with TSD to a greater extent than in GSD species. Whereas male dispersal led to expanded species ranges across warm (female-producing) climates, female dispersal led to expanded ranges across cool (male-producing) climates. Two-sex dispersal eliminated the influence of biased sex ratios on ranges.Conclusion: The results highlight the importance of the demographic parameter of sex ratio in determining population persistence and species range limits.

    Original languageEnglish
    Article number19
    Pages (from-to)1-10
    Number of pages10
    JournalBMC Ecology
    Volume14
    DOIs
    Publication statusPublished - 2014

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    sex ratio
    sex determination
    climate
    gender
    persistence
    temperature
    reptile
    reptiles
    air temperature
    simulation models
    ambient temperature
    demographic statistics
    environmental factors
    simulation
    parameter

    Cite this

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    title = "How do climate-linked sex ratios and dispersal limit range boundaries?",
    abstract = "Background: Geographic ranges of ectotherms such as reptiles may be determined strongly by abiotic factors owing to causal links between ambient temperature, juvenile survival and individual sex (male or female). Unfortunately, we know little of how these factors interact with dispersal among populations across a species range. We used a simulation model to examine the effects of dispersal, temperature-dependent juvenile survival and sex determining mechanism (temperature-dependent sex determination (TSD) and genotypic sex determination (GSD)) and their interactions, on range limits in populations extending across a continuous range of air temperatures. In particular, we examined the relative importance of these parameters for population persistence to recommend targets for future empirical research.Results: Dispersal influenced the range limits of species with TSD to a greater extent than in GSD species. Whereas male dispersal led to expanded species ranges across warm (female-producing) climates, female dispersal led to expanded ranges across cool (male-producing) climates. Two-sex dispersal eliminated the influence of biased sex ratios on ranges.Conclusion: The results highlight the importance of the demographic parameter of sex ratio in determining population persistence and species range limits.",
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    author = "Maria Boyle and Lisa Schwanz and Jim HONE and Arthur GEORGES",
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    doi = "10.1186/1472-6785-14-19",
    language = "English",
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    pages = "1--10",
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    How do climate-linked sex ratios and dispersal limit range boundaries? / Boyle, Maria; Schwanz, Lisa; HONE, Jim; GEORGES, Arthur.

    In: BMC Ecology, Vol. 14, 19, 2014, p. 1-10.

    Research output: Contribution to journalArticle

    TY - JOUR

    T1 - How do climate-linked sex ratios and dispersal limit range boundaries?

    AU - Boyle, Maria

    AU - Schwanz, Lisa

    AU - HONE, Jim

    AU - GEORGES, Arthur

    PY - 2014

    Y1 - 2014

    N2 - Background: Geographic ranges of ectotherms such as reptiles may be determined strongly by abiotic factors owing to causal links between ambient temperature, juvenile survival and individual sex (male or female). Unfortunately, we know little of how these factors interact with dispersal among populations across a species range. We used a simulation model to examine the effects of dispersal, temperature-dependent juvenile survival and sex determining mechanism (temperature-dependent sex determination (TSD) and genotypic sex determination (GSD)) and their interactions, on range limits in populations extending across a continuous range of air temperatures. In particular, we examined the relative importance of these parameters for population persistence to recommend targets for future empirical research.Results: Dispersal influenced the range limits of species with TSD to a greater extent than in GSD species. Whereas male dispersal led to expanded species ranges across warm (female-producing) climates, female dispersal led to expanded ranges across cool (male-producing) climates. Two-sex dispersal eliminated the influence of biased sex ratios on ranges.Conclusion: The results highlight the importance of the demographic parameter of sex ratio in determining population persistence and species range limits.

    AB - Background: Geographic ranges of ectotherms such as reptiles may be determined strongly by abiotic factors owing to causal links between ambient temperature, juvenile survival and individual sex (male or female). Unfortunately, we know little of how these factors interact with dispersal among populations across a species range. We used a simulation model to examine the effects of dispersal, temperature-dependent juvenile survival and sex determining mechanism (temperature-dependent sex determination (TSD) and genotypic sex determination (GSD)) and their interactions, on range limits in populations extending across a continuous range of air temperatures. In particular, we examined the relative importance of these parameters for population persistence to recommend targets for future empirical research.Results: Dispersal influenced the range limits of species with TSD to a greater extent than in GSD species. Whereas male dispersal led to expanded species ranges across warm (female-producing) climates, female dispersal led to expanded ranges across cool (male-producing) climates. Two-sex dispersal eliminated the influence of biased sex ratios on ranges.Conclusion: The results highlight the importance of the demographic parameter of sex ratio in determining population persistence and species range limits.

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    KW - Range limits

    KW - Reptiles

    KW - Sex ratio

    KW - TSD

    KW - Climate

    KW - Temperature

    KW - Male

    KW - Animal Distribution

    KW - Sex Ratio

    KW - Animals

    KW - Fertility

    KW - Computer Simulation

    KW - Female

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