Contrasting effects of climate on grey heron, malleefowl and barn owl populations

Maria Boyle, Jim Hone

    Research output: Contribution to journalArticle

    1 Citation (Scopus)

    Abstract

    Context. The population dynamics of many wildlife species are associated with fluctuations in climate. Food and abundance may also influence wildlife dynamics. Aims. The present paper aims to evaluate the relative effects of climate on the annual instantaneous population growth rate (r) of the following three bird species: grey heron and barn owl in parts of Britain and malleefowl in a part of Australia. Methods. A priori hypotheses of mechanistic effects of climate are derived and evaluated using information theoretic and regression analyses and published data for the three bird species. Climate was measured as the winter North Atlantic Oscillation (NAO) for herons and owls, and rainfall and also the Southern Oscillation Index (SOI) for malleefowl. Key results. Population dynamics of grey heron were positively related to the winter NAO, and of malleefowl were positively related to annual rainfall and related in a non-linear manner to SOI. By contrast, population dynamics of barn owl were very weakly related to climate. The best models for the grey heron differed between time periods but always included an effect of the NAO. Conclusions. The annual population growth rate of grey heron, malleefowl and barn owl show contrasting relationships with climate, from stronger (heron and malleefowl) to weaker (barn owl). The results were broadly consistent with reported patterns but differed in some details. Interpretation of the effects of climate on the basis of analyses rather than visual assessment is encouraged. Implications. Effects of climate differ among species, so effects of future climate change may also differ.
    Original languageEnglish
    Pages (from-to)7-14
    Number of pages8
    JournalWildlife Research
    Volume39
    Issue number1
    DOIs
    Publication statusPublished - 2012

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    Tyto alba
    climate
    North Atlantic Oscillation
    population dynamics
    Ardeidae
    Southern Oscillation
    oscillation
    population growth
    wildlife
    rain
    rainfall
    Ardea cinerea
    effect
    winter
    birds
    Strigiformes
    United Kingdom
    climate change
    food

    Cite this

    @article{d8b5e8b4cf4d45c299d9e29c8f8280f6,
    title = "Contrasting effects of climate on grey heron, malleefowl and barn owl populations",
    abstract = "Context. The population dynamics of many wildlife species are associated with fluctuations in climate. Food and abundance may also influence wildlife dynamics. Aims. The present paper aims to evaluate the relative effects of climate on the annual instantaneous population growth rate (r) of the following three bird species: grey heron and barn owl in parts of Britain and malleefowl in a part of Australia. Methods. A priori hypotheses of mechanistic effects of climate are derived and evaluated using information theoretic and regression analyses and published data for the three bird species. Climate was measured as the winter North Atlantic Oscillation (NAO) for herons and owls, and rainfall and also the Southern Oscillation Index (SOI) for malleefowl. Key results. Population dynamics of grey heron were positively related to the winter NAO, and of malleefowl were positively related to annual rainfall and related in a non-linear manner to SOI. By contrast, population dynamics of barn owl were very weakly related to climate. The best models for the grey heron differed between time periods but always included an effect of the NAO. Conclusions. The annual population growth rate of grey heron, malleefowl and barn owl show contrasting relationships with climate, from stronger (heron and malleefowl) to weaker (barn owl). The results were broadly consistent with reported patterns but differed in some details. Interpretation of the effects of climate on the basis of analyses rather than visual assessment is encouraged. Implications. Effects of climate differ among species, so effects of future climate change may also differ.",
    keywords = "barn owl, grey heron, malleefowl, numerical response, wildlife population dynamics.",
    author = "Maria Boyle and Jim Hone",
    year = "2012",
    doi = "10.1071/WR10233",
    language = "English",
    volume = "39",
    pages = "7--14",
    journal = "Australian Wildlife Research",
    issn = "1035-3712",
    publisher = "CSIRO",
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    }

    Contrasting effects of climate on grey heron, malleefowl and barn owl populations. / Boyle, Maria; Hone, Jim.

    In: Wildlife Research, Vol. 39, No. 1, 2012, p. 7-14.

    Research output: Contribution to journalArticle

    TY - JOUR

    T1 - Contrasting effects of climate on grey heron, malleefowl and barn owl populations

    AU - Boyle, Maria

    AU - Hone, Jim

    PY - 2012

    Y1 - 2012

    N2 - Context. The population dynamics of many wildlife species are associated with fluctuations in climate. Food and abundance may also influence wildlife dynamics. Aims. The present paper aims to evaluate the relative effects of climate on the annual instantaneous population growth rate (r) of the following three bird species: grey heron and barn owl in parts of Britain and malleefowl in a part of Australia. Methods. A priori hypotheses of mechanistic effects of climate are derived and evaluated using information theoretic and regression analyses and published data for the three bird species. Climate was measured as the winter North Atlantic Oscillation (NAO) for herons and owls, and rainfall and also the Southern Oscillation Index (SOI) for malleefowl. Key results. Population dynamics of grey heron were positively related to the winter NAO, and of malleefowl were positively related to annual rainfall and related in a non-linear manner to SOI. By contrast, population dynamics of barn owl were very weakly related to climate. The best models for the grey heron differed between time periods but always included an effect of the NAO. Conclusions. The annual population growth rate of grey heron, malleefowl and barn owl show contrasting relationships with climate, from stronger (heron and malleefowl) to weaker (barn owl). The results were broadly consistent with reported patterns but differed in some details. Interpretation of the effects of climate on the basis of analyses rather than visual assessment is encouraged. Implications. Effects of climate differ among species, so effects of future climate change may also differ.

    AB - Context. The population dynamics of many wildlife species are associated with fluctuations in climate. Food and abundance may also influence wildlife dynamics. Aims. The present paper aims to evaluate the relative effects of climate on the annual instantaneous population growth rate (r) of the following three bird species: grey heron and barn owl in parts of Britain and malleefowl in a part of Australia. Methods. A priori hypotheses of mechanistic effects of climate are derived and evaluated using information theoretic and regression analyses and published data for the three bird species. Climate was measured as the winter North Atlantic Oscillation (NAO) for herons and owls, and rainfall and also the Southern Oscillation Index (SOI) for malleefowl. Key results. Population dynamics of grey heron were positively related to the winter NAO, and of malleefowl were positively related to annual rainfall and related in a non-linear manner to SOI. By contrast, population dynamics of barn owl were very weakly related to climate. The best models for the grey heron differed between time periods but always included an effect of the NAO. Conclusions. The annual population growth rate of grey heron, malleefowl and barn owl show contrasting relationships with climate, from stronger (heron and malleefowl) to weaker (barn owl). The results were broadly consistent with reported patterns but differed in some details. Interpretation of the effects of climate on the basis of analyses rather than visual assessment is encouraged. Implications. Effects of climate differ among species, so effects of future climate change may also differ.

    KW - barn owl

    KW - grey heron

    KW - malleefowl

    KW - numerical response

    KW - wildlife population dynamics.

    U2 - 10.1071/WR10233

    DO - 10.1071/WR10233

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    SP - 7

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    JO - Australian Wildlife Research

    JF - Australian Wildlife Research

    SN - 1035-3712

    IS - 1

    ER -