Climate change and long-term fire management impacts on Australian savannas

Simon Scheiter, Steven Higgins, Jason Beringer, Lindsay Hutley

    Research output: Contribution to journalArticleResearchpeer-review

    Abstract

    Tropical savannas cover a large proportion of the Earth's land surface and many people are dependent on the ecosystem services that savannas supply. Their sustainable management is crucial. Owing to the complexity of savanna vegetation dynamics, climate change and land use impacts on savannas are highly uncertain.

    We used a dynamic vegetation model, the adaptive dynamic global vegetation model (aDGVM), to project how climate change and fire management might influence future vegetation in northern Australian savannas.

    Under future climate conditions, vegetation can store more carbon than under ambient conditions. Changes in rainfall seasonality influence future carbon storage but do not turn vegetation into a carbon source, suggesting that CO2 fertilization is the main driver of vegetation change. The application of prescribed fires with varying return intervals and burning season influences vegetation and fire impacts. Carbon sequestration is maximized with early dry season fires and long fire return intervals, while grass productivity is maximized with late dry season fires and intermediate fire return intervals.

    The study has implications for management policy across Australian savannas because it identifies how fire management strategies may influence grazing yield, carbon sequestration and greenhouse gas emissions. This knowledge is crucial to maintaining important ecosystem services of Australian savannas.
    Original languageEnglish
    Pages (from-to)1211-1226
    Number of pages16
    JournalNew Phytologist
    Volume205
    Issue number3
    DOIs
    Publication statusPublished - 2015

    Fingerprint

    Climate Change
    savannas
    climate change
    vegetation
    Carbon Sequestration
    carbon sequestration
    Carbon
    ecosystem services
    Ecosystem
    dry season
    burning season
    Grassland
    prescribed burning
    greenhouse gas emissions
    Poaceae
    Climate
    Fertilization
    carbon sinks
    land use
    Gases

    Cite this

    Scheiter, Simon ; Higgins, Steven ; Beringer, Jason ; Hutley, Lindsay. / Climate change and long-term fire management impacts on Australian savannas. In: New Phytologist. 2015 ; Vol. 205, No. 3. pp. 1211-1226.
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    Climate change and long-term fire management impacts on Australian savannas. / Scheiter, Simon; Higgins, Steven; Beringer, Jason; Hutley, Lindsay.

    In: New Phytologist, Vol. 205, No. 3, 2015, p. 1211-1226.

    Research output: Contribution to journalArticleResearchpeer-review

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    AU - Scheiter, Simon

    AU - Higgins, Steven

    AU - Beringer, Jason

    AU - Hutley, Lindsay

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    N2 - Tropical savannas cover a large proportion of the Earth's land surface and many people are dependent on the ecosystem services that savannas supply. Their sustainable management is crucial. Owing to the complexity of savanna vegetation dynamics, climate change and land use impacts on savannas are highly uncertain.We used a dynamic vegetation model, the adaptive dynamic global vegetation model (aDGVM), to project how climate change and fire management might influence future vegetation in northern Australian savannas.Under future climate conditions, vegetation can store more carbon than under ambient conditions. Changes in rainfall seasonality influence future carbon storage but do not turn vegetation into a carbon source, suggesting that CO2 fertilization is the main driver of vegetation change. The application of prescribed fires with varying return intervals and burning season influences vegetation and fire impacts. Carbon sequestration is maximized with early dry season fires and long fire return intervals, while grass productivity is maximized with late dry season fires and intermediate fire return intervals.The study has implications for management policy across Australian savannas because it identifies how fire management strategies may influence grazing yield, carbon sequestration and greenhouse gas emissions. This knowledge is crucial to maintaining important ecosystem services of Australian savannas.

    AB - Tropical savannas cover a large proportion of the Earth's land surface and many people are dependent on the ecosystem services that savannas supply. Their sustainable management is crucial. Owing to the complexity of savanna vegetation dynamics, climate change and land use impacts on savannas are highly uncertain.We used a dynamic vegetation model, the adaptive dynamic global vegetation model (aDGVM), to project how climate change and fire management might influence future vegetation in northern Australian savannas.Under future climate conditions, vegetation can store more carbon than under ambient conditions. Changes in rainfall seasonality influence future carbon storage but do not turn vegetation into a carbon source, suggesting that CO2 fertilization is the main driver of vegetation change. The application of prescribed fires with varying return intervals and burning season influences vegetation and fire impacts. Carbon sequestration is maximized with early dry season fires and long fire return intervals, while grass productivity is maximized with late dry season fires and intermediate fire return intervals.The study has implications for management policy across Australian savannas because it identifies how fire management strategies may influence grazing yield, carbon sequestration and greenhouse gas emissions. This knowledge is crucial to maintaining important ecosystem services of Australian savannas.

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    KW - Computer Simulation

    KW - Conservation of Natural Resources

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    DO - 10.1111/nph.13130

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