Distribution of modern diatom assemblages among small playas

D.A. Boggs, P. Gell, Ian Eliot, Brenton Knott

    Research output: Contribution to journalArticle

    Abstract

    Diatom diversity of six small playa lakes within the Yarra Yarra drainage system, Western Australia, and the environmental variables likely to influence their distribution was investigated. Thirty-one pennate diatom taxa were identified. Taxa consisted of facultative planktonic and periphytic, circumneutral to alkaliphilous or pH-indifferent forms with known adaptations to saline conditions and fluctuations in salinity in NaCl dominated waters. Data were analysed by ordination (MDS and PCA), hierarchical clustering (CLUSTER), permutation-based hypothesis testing (ANOSIM) and comparative tests on similarity matrices (RELATE). Water depth accounted for the majority of variation in the environmental data. REALTE comparisons of environmental and taxa data did not produce a significant correlation value. We propose that the poor concurrence of the datasets was influenced by the wide ecological tolerances of the taxa recorded, some crucial unmeasured environmental variable/s, possible geographical regionalisation and/or unsampled taxa variability owing to the stochastic nature of the wetlands. Broad patterns of distribution were related to hydroperiod and some taxa groups were loosely associated with environmental groups consistent with established ecological tolerances for the taxa.
    Original languageEnglish
    Pages (from-to)131-143
    JournalAustralian Journal of Botany
    Volume56
    DOIs
    Publication statusPublished - 2008

    Fingerprint

    playas
    Bacillariophyceae
    playa
    diatom
    tolerance
    hydroperiod
    environmental factors
    drainage systems
    hypothesis testing
    regionalization
    ordination
    Western Australia
    water depth
    wetlands
    testing
    wetland
    salinity
    lakes
    matrix
    water

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    Boggs, D.A. ; Gell, P. ; Eliot, Ian ; Knott, Brenton. / Distribution of modern diatom assemblages among small playas. In: Australian Journal of Botany. 2008 ; Vol. 56. pp. 131-143.
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    Distribution of modern diatom assemblages among small playas. / Boggs, D.A.; Gell, P.; Eliot, Ian; Knott, Brenton.

    In: Australian Journal of Botany, Vol. 56, 2008, p. 131-143.

    Research output: Contribution to journalArticle

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