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    Dominance–diversity relationships in ant communities differ with invasion

    Access Status
    Fulltext not available
    Authors
    Arnan, X.
    Andersen, A.
    Gibb, H.
    Parr, C.
    Sanders, N.
    Dunn, R.
    Angulo, E.
    Baccaro, F.
    Bishop, T.
    Boulay, R.
    Castracani, C.
    Cerdá, X.
    Toro, I.
    Delsinne, T.
    Donoso, D.
    Elten, E.
    Fayle, T.
    Fitzpatrick, M.
    Gómez, C.
    Grasso, D.
    Grossman, B.
    Guénard, B.
    Gunawardene, Nihara
    Heterick, Brian
    Hoffmann, B.
    Janda, M.
    Jenkins, C.
    Klimes, P.
    Lach, L.
    Laeger, T.
    Leponce, M.
    Lucky, A.
    Majer, Jonathan
    Menke, S.
    Mezger, D.
    Mori, A.
    Moses, J.
    Munyai, T.
    Paknia, O.
    Pfeiffer, M.
    Philpott, S.
    Souza, J.
    Tista, M.
    Vasconcelos, H.
    Retana, J.
    Date
    2018
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Arnan, X. and Andersen, A. and Gibb, H. and Parr, C. and Sanders, N. and Dunn, R. and Angulo, E. et al. 2018. Dominance–diversity relationships in ant communities differ with invasion. Global Change Biology. 24 (10): pp. 4614-4625.
    Source Title
    Global Change Biology
    DOI
    10.1111/gcb.14331
    ISSN
    1354-1013
    School
    School of Molecular and Life Sciences (MLS)
    URI
    http://hdl.handle.net/20.500.11937/73408
    Collection
    • Curtin Research Publications
    Abstract

    © 2018 John Wiley & Sons Ltd The relationship between levels of dominance and species richness is highly contentious, especially in ant communities. The dominance-impoverishment rule states that high levels of dominance only occur in species-poor communities, but there appear to be many cases of high levels of dominance in highly diverse communities. The extent to which dominant species limit local richness through competitive exclusion remains unclear, but such exclusion appears more apparent for non-native rather than native dominant species. Here we perform the first global analysis of the relationship between behavioral dominance and species richness. We used data from 1,293 local assemblages of ground-dwelling ants distributed across five continents to document the generality of the dominance-impoverishment rule, and to identify the biotic and abiotic conditions under which it does and does not apply. We found that the behavioral dominance–diversity relationship varies greatly, and depends on whether dominant species are native or non-native, whether dominance is considered as occurrence or relative abundance, and on variation in mean annual temperature. There were declines in diversity with increasing dominance in invaded communities, but diversity increased with increasing dominance in native communities. These patterns occur along the global temperature gradient. However, positive and negative relationships are strongest in the hottest sites. We also found that climate regulates the degree of behavioral dominance, but differently from how it shapes species richness. Our findings imply that, despite strong competitive interactions among ants, competitive exclusion is not a major driver of local richness in native ant communities. Although the dominance-impoverishment rule applies to invaded communities, we propose an alternative dominance-diversification rule for native communities.

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