Climate drying amplifies the effects of land-use change and interspecific interactions on birds

Joanne M. Bennett, Rohan H. Clarke, Gregory Horrocks, Ralph MAC NALLY

    Research output: Contribution to journalArticle

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    Abstract

    Context: Climate change may amplify the effects of land-use change, including induced changes in interspecific interactions. Objectives: To investigate whether an avifauna changed over a period of severe drought, and if changes in avifaunas were related to changes in vegetation characteristics and the irruption of a despotic native species, the noisy miner Manorina melanocephala. Methods: In the box–ironbark forests of south-eastern Australia, we resurveyed the avifaunas and remeasured vegetation characteristics in 120 forest transects in 2010–2011 that had previously been measured in 1995–1997. Results: The avifauna changed markedly over the prolonged drought, and changes were more marked in smaller fragments of remnant vegetation in which more pronounced vegetation change had occurred. The noisy miner increased differentially in smaller remnants adding to the declines, especially for small-bodied birds. Conclusions: Long droughts interspersed with short wet periods are projected for the region, so the imposition of climate effects on an already much-modified region has profound implications for the avifauna. The noisy miner has (and continues) to benefit from both land-use and climate change, so future sequences of drought interspersed with short wet periods are likely to lead to further changes in the avifauna as the miner extends its occupancy. Differential reductions in small nectarivores and insectivores will affect ecosystem processes, including the control of defoliating insects, seed dispersal and pollination.
    Original languageEnglish
    Pages (from-to)2031-2043
    Number of pages13
    JournalLandscape Ecology
    Volume30
    Issue number10
    DOIs
    Publication statusPublished - 2015

    Fingerprint

    interspecific interaction
    avifauna
    miner
    drought
    land use change
    land use
    climate
    bird
    vegetation
    interaction
    climate change
    insectivore
    climate effect
    seed dispersal
    pollination
    native species
    transect
    insect
    drying
    effect

    Cite this

    Bennett, Joanne M. ; Clarke, Rohan H. ; Horrocks, Gregory ; MAC NALLY, Ralph. / Climate drying amplifies the effects of land-use change and interspecific interactions on birds. In: Landscape Ecology. 2015 ; Vol. 30, No. 10. pp. 2031-2043.
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    title = "Climate drying amplifies the effects of land-use change and interspecific interactions on birds",
    abstract = "Context: Climate change may amplify the effects of land-use change, including induced changes in interspecific interactions. Objectives: To investigate whether an avifauna changed over a period of severe drought, and if changes in avifaunas were related to changes in vegetation characteristics and the irruption of a despotic native species, the noisy miner Manorina melanocephala. Methods: In the box–ironbark forests of south-eastern Australia, we resurveyed the avifaunas and remeasured vegetation characteristics in 120 forest transects in 2010–2011 that had previously been measured in 1995–1997. Results: The avifauna changed markedly over the prolonged drought, and changes were more marked in smaller fragments of remnant vegetation in which more pronounced vegetation change had occurred. The noisy miner increased differentially in smaller remnants adding to the declines, especially for small-bodied birds. Conclusions: Long droughts interspersed with short wet periods are projected for the region, so the imposition of climate effects on an already much-modified region has profound implications for the avifauna. The noisy miner has (and continues) to benefit from both land-use and climate change, so future sequences of drought interspersed with short wet periods are likely to lead to further changes in the avifauna as the miner extends its occupancy. Differential reductions in small nectarivores and insectivores will affect ecosystem processes, including the control of defoliating insects, seed dispersal and pollination.",
    author = "Bennett, {Joanne M.} and Clarke, {Rohan H.} and Gregory Horrocks and {MAC NALLY}, Ralph",
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    Climate drying amplifies the effects of land-use change and interspecific interactions on birds. / Bennett, Joanne M.; Clarke, Rohan H.; Horrocks, Gregory; MAC NALLY, Ralph.

    In: Landscape Ecology, Vol. 30, No. 10, 2015, p. 2031-2043.

    Research output: Contribution to journalArticle

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    AB - Context: Climate change may amplify the effects of land-use change, including induced changes in interspecific interactions. Objectives: To investigate whether an avifauna changed over a period of severe drought, and if changes in avifaunas were related to changes in vegetation characteristics and the irruption of a despotic native species, the noisy miner Manorina melanocephala. Methods: In the box–ironbark forests of south-eastern Australia, we resurveyed the avifaunas and remeasured vegetation characteristics in 120 forest transects in 2010–2011 that had previously been measured in 1995–1997. Results: The avifauna changed markedly over the prolonged drought, and changes were more marked in smaller fragments of remnant vegetation in which more pronounced vegetation change had occurred. The noisy miner increased differentially in smaller remnants adding to the declines, especially for small-bodied birds. Conclusions: Long droughts interspersed with short wet periods are projected for the region, so the imposition of climate effects on an already much-modified region has profound implications for the avifauna. The noisy miner has (and continues) to benefit from both land-use and climate change, so future sequences of drought interspersed with short wet periods are likely to lead to further changes in the avifauna as the miner extends its occupancy. Differential reductions in small nectarivores and insectivores will affect ecosystem processes, including the control of defoliating insects, seed dispersal and pollination.

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