Land management affects grass biomass in the Eucalyptus tetrodonta savannas of monsoonal Australia

David Bowman, Donald Franklin, Owen Price, B BROOK

    Research output: Contribution to journalArticleResearchpeer-review

    Abstract

    We surveyed herbaceous biomass across the range of Eucalyptus tetrodonta savannas in north-western Australia. Sample sites (n = 211) were stratified within four broad geographical regions characterized by different mixes of land management regimes. Grasses dominated (87% mean) the herbaceous biomass. After controlling for climatic and edaphic gradients, herbaceous biomass was highest in the Greater Darwin region (2.2 t ha-1) which is managed predominantly by Europeans, and least under semi-traditional Aboriginal management in Arnhem Land region (1.1 t ha-1). In the drier Gulf of Carpentaria and Kimberley regions, where a mix of Aboriginal, conservation and pastoral land uses occurs, fuel loads were higher than in Arnhem Land region but still considerably lower than around Darwin. Sarga was recorded in all regions except the Gulf of Carpentaria and had the highest biomass in Darwin (0.88 t ha-1) and lowest biomass in the Kimberley (0.54 t ha-1). The proportion of herbaceous biomass made up of perennial grasses was least in Darwin (17%) and greatest in the Gulf (77%) regions. We suggest that climate, soils and land management account for differences between the drier pastoral regions of the Gulf of Carpentaria and the Kimberley and the wet Greater Darwin region relative to the Arnhem Land region. The high frequency, and larger spatial scale, of fires in the Greater Darwin region relative to the Arnhem Land region underpins the contrasting trends in total herbaceous biomass and abundance of flammable annual grasses. � 2007 Ecological Society of Australia.
    Original languageEnglish
    Pages (from-to)446-452
    Number of pages7
    JournalAustral Ecology
    Volume32
    Issue number4
    Publication statusPublished - 2007

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    Eucalyptus tetrodonta
    land management
    savanna
    savannas
    grass
    grasses
    biomass
    soil management
    Western Australia
    geographical region
    land use
    arid region
    climate

    Cite this

    Bowman, D., Franklin, D., Price, O., & BROOK, B. (2007). Land management affects grass biomass in the Eucalyptus tetrodonta savannas of monsoonal Australia. Austral Ecology, 32(4), 446-452.
    Bowman, David ; Franklin, Donald ; Price, Owen ; BROOK, B. / Land management affects grass biomass in the Eucalyptus tetrodonta savannas of monsoonal Australia. In: Austral Ecology. 2007 ; Vol. 32, No. 4. pp. 446-452.
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    abstract = "We surveyed herbaceous biomass across the range of Eucalyptus tetrodonta savannas in north-western Australia. Sample sites (n = 211) were stratified within four broad geographical regions characterized by different mixes of land management regimes. Grasses dominated (87{\%} mean) the herbaceous biomass. After controlling for climatic and edaphic gradients, herbaceous biomass was highest in the Greater Darwin region (2.2 t ha-1) which is managed predominantly by Europeans, and least under semi-traditional Aboriginal management in Arnhem Land region (1.1 t ha-1). In the drier Gulf of Carpentaria and Kimberley regions, where a mix of Aboriginal, conservation and pastoral land uses occurs, fuel loads were higher than in Arnhem Land region but still considerably lower than around Darwin. Sarga was recorded in all regions except the Gulf of Carpentaria and had the highest biomass in Darwin (0.88 t ha-1) and lowest biomass in the Kimberley (0.54 t ha-1). The proportion of herbaceous biomass made up of perennial grasses was least in Darwin (17{\%}) and greatest in the Gulf (77{\%}) regions. We suggest that climate, soils and land management account for differences between the drier pastoral regions of the Gulf of Carpentaria and the Kimberley and the wet Greater Darwin region relative to the Arnhem Land region. The high frequency, and larger spatial scale, of fires in the Greater Darwin region relative to the Arnhem Land region underpins the contrasting trends in total herbaceous biomass and abundance of flammable annual grasses. � 2007 Ecological Society of Australia.",
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    author = "David Bowman and Donald Franklin and Owen Price and B BROOK",
    year = "2007",
    language = "English",
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    Bowman, D, Franklin, D, Price, O & BROOK, B 2007, 'Land management affects grass biomass in the Eucalyptus tetrodonta savannas of monsoonal Australia', Austral Ecology, vol. 32, no. 4, pp. 446-452.

    Land management affects grass biomass in the Eucalyptus tetrodonta savannas of monsoonal Australia. / Bowman, David; Franklin, Donald; Price, Owen; BROOK, B.

    In: Austral Ecology, Vol. 32, No. 4, 2007, p. 446-452.

    Research output: Contribution to journalArticleResearchpeer-review

    TY - JOUR

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    N2 - We surveyed herbaceous biomass across the range of Eucalyptus tetrodonta savannas in north-western Australia. Sample sites (n = 211) were stratified within four broad geographical regions characterized by different mixes of land management regimes. Grasses dominated (87% mean) the herbaceous biomass. After controlling for climatic and edaphic gradients, herbaceous biomass was highest in the Greater Darwin region (2.2 t ha-1) which is managed predominantly by Europeans, and least under semi-traditional Aboriginal management in Arnhem Land region (1.1 t ha-1). In the drier Gulf of Carpentaria and Kimberley regions, where a mix of Aboriginal, conservation and pastoral land uses occurs, fuel loads were higher than in Arnhem Land region but still considerably lower than around Darwin. Sarga was recorded in all regions except the Gulf of Carpentaria and had the highest biomass in Darwin (0.88 t ha-1) and lowest biomass in the Kimberley (0.54 t ha-1). The proportion of herbaceous biomass made up of perennial grasses was least in Darwin (17%) and greatest in the Gulf (77%) regions. We suggest that climate, soils and land management account for differences between the drier pastoral regions of the Gulf of Carpentaria and the Kimberley and the wet Greater Darwin region relative to the Arnhem Land region. The high frequency, and larger spatial scale, of fires in the Greater Darwin region relative to the Arnhem Land region underpins the contrasting trends in total herbaceous biomass and abundance of flammable annual grasses. � 2007 Ecological Society of Australia.

    AB - We surveyed herbaceous biomass across the range of Eucalyptus tetrodonta savannas in north-western Australia. Sample sites (n = 211) were stratified within four broad geographical regions characterized by different mixes of land management regimes. Grasses dominated (87% mean) the herbaceous biomass. After controlling for climatic and edaphic gradients, herbaceous biomass was highest in the Greater Darwin region (2.2 t ha-1) which is managed predominantly by Europeans, and least under semi-traditional Aboriginal management in Arnhem Land region (1.1 t ha-1). In the drier Gulf of Carpentaria and Kimberley regions, where a mix of Aboriginal, conservation and pastoral land uses occurs, fuel loads were higher than in Arnhem Land region but still considerably lower than around Darwin. Sarga was recorded in all regions except the Gulf of Carpentaria and had the highest biomass in Darwin (0.88 t ha-1) and lowest biomass in the Kimberley (0.54 t ha-1). The proportion of herbaceous biomass made up of perennial grasses was least in Darwin (17%) and greatest in the Gulf (77%) regions. We suggest that climate, soils and land management account for differences between the drier pastoral regions of the Gulf of Carpentaria and the Kimberley and the wet Greater Darwin region relative to the Arnhem Land region. The high frequency, and larger spatial scale, of fires in the Greater Darwin region relative to the Arnhem Land region underpins the contrasting trends in total herbaceous biomass and abundance of flammable annual grasses. � 2007 Ecological Society of Australia.

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    KW - savanna

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    KW - Kimberley

    KW - Northern Cape

    KW - Northern Territory

    KW - Pacific Ocean

    KW - South Africa

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    KW - Sub-Saharan Africa

    KW - Carpentaria

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    KW - Poaceae

    KW - Sarga

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