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    Legacy issues in post-pine (Pinus pinaster) restoration environments: Weeds compromise seedling growth and function more than edaphic factors

    Access Status
    Fulltext not available
    Authors
    Stanbury, K.
    Stevens, Jason
    Ritchie, Alison
    Date
    2018
    Type
    Journal Article
    
    Metadata
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    Citation
    Stanbury, K. and Stevens, J. and Ritchie, A. 2018. Legacy issues in post-pine (Pinus pinaster) restoration environments: Weeds compromise seedling growth and function more than edaphic factors. Land Degradation and Development. 29 (6): pp. 1694-1704.
    Source Title
    Land Degradation and Development
    DOI
    10.1002/ldr.2945
    ISSN
    1085-3278
    School
    School of Molecular and Life Sciences (MLS)
    URI
    http://hdl.handle.net/20.500.11937/69757
    Collection
    • Curtin Research Publications
    Abstract

    Restoration of commercial pine plantations to native ecosystems is increasing globally. This study investigated the abiotic and biotic factors in a postpine (Pinus pinaster) ecosystem that could potentially limit successful restoration of highly biodiverse Banksia woodlands. Soil abiotic conditions were analysed across a 7-year postpine chronosequence and compared with a reference Banksia woodland soil to assess soil legacy issues. Ten native species were grown in postpine soils and monitored for germination and growth responses. Three species were selected and grown in the presence of an invasive species, Ehrharta calycina, to assess biotic impacts on seedling emergence, establishment, physiology, and drought response. Analysis revealed no differences in soil abiotic conditions along the chronosequence in comparison with the reference soil, apart from increasing organic carbon along the chronosequence (p =.003). Germination was not impeded in postpine soils, but seedling growth responses varied among species and soils. Seedling emergence was not affected by the presence of E. calycina; however, seedling growth measurements were significantly reduced (20%–78% decline). Physiological function (stomatal conductance) of native seedlings prior to drought treatment was not impeded, though when grown with E. calycina under drought 2 species, Banksia menziesii and Corymbia calophylla, exhibited a more rapid loss of physiological function. This case study examines abiotic and biotic limitations to Banksia woodland restoration success in postpine environments, suggesting postpine soils are not a barrier to restoration, and highlight the importance of preventing E. calycina from becoming established.

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