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    Habitat heterogeneity promotes intraspecific trait variability of shrub species in Australian granite inselbergs

    Access Status
    Fulltext not available
    Authors
    De Smedt, P.
    Ottaviani, G.
    Wardell-Johnson, Grant
    Sýkora, K.
    Mucina, L.
    Date
    2018
    Type
    Journal Article
    
    Metadata
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    Citation
    De Smedt, P. and Ottaviani, G. and Wardell-Johnson, G. and Sýkora, K. and Mucina, L. 2018. Habitat heterogeneity promotes intraspecific trait variability of shrub species in Australian granite inselbergs. Folia Geobotanica. 53 (2): pp. 133–145.
    Source Title
    Folia Geobotanica
    DOI
    10.1007/s12224-018-9311-x
    ISSN
    1211-9520
    School
    School of Molecular and Life Sciences (MLS)
    URI
    http://hdl.handle.net/20.500.11937/68079
    Collection
    • Curtin Research Publications
    Abstract

    The role of intraspecific trait variability is increasingly recognized as a key factor shaping plant fitness and community assembly worldwide. Studying the direct effects of habitat heterogeneity on trait expression of individual plants of the same species is a useful tool to quantify intraspecific trait variability locally. We investigated how habitat heterogeneity on granite inselbergs affected intraspecific trait variability of 19 functional traits in three shrub species of the family Proteaceae in south western Australia, a global biodiversity hotspot. We used pairwise comparison (single trait) and multivariate analysis (multiple traits, functional space) to detect shifts in trait patterns. Consistent with our predictions, we found that individuals developing in putatively more stressful habitats (highly sun-irradiated, shallow-soil patches on the outcrops) were characterized by trait expressions indicative of more conservative resource-related strategies when compared with plants occurring in the surrounding woodlands that were experiencing more benign ecological conditions. These results were significant for two out of three species. Granite inselbergs promoted plant longevity, a signal that these granite inselbergs might offer refugial conditions defined as protection against fire.

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