Intra-specific variation in leaf attributes of four savanna tree species across a rainfall gradient in tropical Australia

L Prior, David Bowman, D EAMUS

    Research output: Contribution to journalArticleResearchpeer-review

    Abstract

    Leaf attributes of four savanna tree species were measured along a rainfall gradient (1650-950 mm per annum) in the Australian monsoon tropics. As the mean annual rainfall decreased, leaf thickness increased for three of these four species. However, a corresponding decrease in leaf density for two species meant that leaf mass per area increased significantly only for one species. Physiological measurements were made during both the wet and dry seasons on comparable stands of vegetation near the extremes and middle of this gradient. Assimilation per unit mass was similar at all three sites but assimilation per leaf area was higher at the drier sites because leaves were thicker with higher mass per area. These results probably reflect reduced tree density and leaf area index at the drier sites, which offsets the lower rainfall, potentially allowing similar rates of assimilation per unit carbohydrate invested in leaves. � CSIRO 2005.
    Original languageEnglish
    Pages (from-to)323-335
    Number of pages13
    JournalAustralian Journal of Botany
    Volume53
    Issue number4
    Publication statusPublished - 2005

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    intraspecific variation
    savanna
    savannas
    rain
    rainfall
    leaves
    assimilation (physiology)
    wet season
    leaf area index
    leaf area
    attribute
    dry season
    carbohydrate
    tropics
    monsoon
    carbohydrates
    vegetation
    assimilation

    Cite this

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    title = "Intra-specific variation in leaf attributes of four savanna tree species across a rainfall gradient in tropical Australia",
    abstract = "Leaf attributes of four savanna tree species were measured along a rainfall gradient (1650-950 mm per annum) in the Australian monsoon tropics. As the mean annual rainfall decreased, leaf thickness increased for three of these four species. However, a corresponding decrease in leaf density for two species meant that leaf mass per area increased significantly only for one species. Physiological measurements were made during both the wet and dry seasons on comparable stands of vegetation near the extremes and middle of this gradient. Assimilation per unit mass was similar at all three sites but assimilation per leaf area was higher at the drier sites because leaves were thicker with higher mass per area. These results probably reflect reduced tree density and leaf area index at the drier sites, which offsets the lower rainfall, potentially allowing similar rates of assimilation per unit carbohydrate invested in leaves. � CSIRO 2005.",
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    author = "L Prior and David Bowman and D EAMUS",
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    Intra-specific variation in leaf attributes of four savanna tree species across a rainfall gradient in tropical Australia. / Prior, L; Bowman, David; EAMUS, D.

    In: Australian Journal of Botany, Vol. 53, No. 4, 2005, p. 323-335.

    Research output: Contribution to journalArticleResearchpeer-review

    TY - JOUR

    T1 - Intra-specific variation in leaf attributes of four savanna tree species across a rainfall gradient in tropical Australia

    AU - Prior, L

    AU - Bowman, David

    AU - EAMUS, D

    PY - 2005

    Y1 - 2005

    N2 - Leaf attributes of four savanna tree species were measured along a rainfall gradient (1650-950 mm per annum) in the Australian monsoon tropics. As the mean annual rainfall decreased, leaf thickness increased for three of these four species. However, a corresponding decrease in leaf density for two species meant that leaf mass per area increased significantly only for one species. Physiological measurements were made during both the wet and dry seasons on comparable stands of vegetation near the extremes and middle of this gradient. Assimilation per unit mass was similar at all three sites but assimilation per leaf area was higher at the drier sites because leaves were thicker with higher mass per area. These results probably reflect reduced tree density and leaf area index at the drier sites, which offsets the lower rainfall, potentially allowing similar rates of assimilation per unit carbohydrate invested in leaves. � CSIRO 2005.

    AB - Leaf attributes of four savanna tree species were measured along a rainfall gradient (1650-950 mm per annum) in the Australian monsoon tropics. As the mean annual rainfall decreased, leaf thickness increased for three of these four species. However, a corresponding decrease in leaf density for two species meant that leaf mass per area increased significantly only for one species. Physiological measurements were made during both the wet and dry seasons on comparable stands of vegetation near the extremes and middle of this gradient. Assimilation per unit mass was similar at all three sites but assimilation per leaf area was higher at the drier sites because leaves were thicker with higher mass per area. These results probably reflect reduced tree density and leaf area index at the drier sites, which offsets the lower rainfall, potentially allowing similar rates of assimilation per unit carbohydrate invested in leaves. � CSIRO 2005.

    KW - environmental gradient

    KW - intraspecific variation

    KW - leaf

    KW - rainfall

    KW - Australasia

    KW - Australia

    KW - Eastern Hemisphere

    KW - World

    M3 - Article

    VL - 53

    SP - 323

    EP - 335

    JO - Australian Journal of Botany

    JF - Australian Journal of Botany

    SN - 0067-1924

    IS - 4

    ER -