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    Climatic drivers of hemispheric asymmetry in global patterns of ant species richness

    Access Status
    Fulltext not available
    Authors
    Dunn, Robert
    Agosti, D.
    Andersen, A.
    Arnan, X.
    Bruhl, C.
    Cerda, X.
    Ellison, A.
    Fisher, B.
    Fitzpatrick, M.
    Gibb, H.
    Gotelli, N.
    Gove, Aaron
    Guenard, B.
    Janda, M.
    Kaspari, M.
    Laurent, E.
    Lessard, J.
    Longino, J.
    Majer, Jonathan
    Menke, S.
    McGlynn, T.
    Parr, C.
    Philpott, S.
    Pfeiffer, M.
    Retana, J.
    Suarez, A.
    Vasconcelos, H.
    Weiser, M.
    Sanders, N.
    Date
    2009
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Dunn, R. and Agosti, D. and Andersen, A. and Arnan, X. and Bruhl, C. and Cerda, X. and Ellison, A. et al. 2009. Climatic drivers of hemispheric asymmetry in global patterns of ant species richness. Ecology Letters. 12 (4): pp. 324-333.
    Source Title
    Ecology Letters
    DOI
    10.1111/j.1461-0248.2009.01291.x
    ISSN
    00129658
    URI
    http://hdl.handle.net/20.500.11937/43715
    Collection
    • Curtin Research Publications
    Abstract

    Although many taxa show a latitudinal gradient in richness, the relationship between latitude and species richness is often asymmetrical between the northern and southern hemispheres. Here we examine the latitudinal pattern of species richness across 1003 local ant assemblages. We find latitudinal asymmetry, with southern hemisphere sites being more diverse than northern hemisphere sites. Most of this asymmetry could be explained statistically by differences in contemporary climate. Local ant species richness was positively associated with temperature, but negatively (although weakly) associated with temperature range and precipitation. After contemporary climate was accounted for, a modest difference in diversity between hemispheres persisted, suggesting that factors other than contemporary climate contributed to the hemispherical asymmetry. The most parsimonious explanation for this remaining asymmetry is that greater climate change since the Eocene in the northern than in the southern hemisphere has led to more extinctions in the northern hemisphere with consequent effects on local ant species richness.

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