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    Diatom assemblages and their associated environmental factors in upland peat forest rivers

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    Author
    O'Driscoll, Connie
    de Eyto, Elvira
    Rodgers, Michael
    O'Connor, Mark
    Asam, Zaki-ul-Zaman
    Xiao, Liwen
    Keyword
    Diatom assemblage
    Blanket peat forest
    Nutrients
    Low alkalinity
    Acid-sensitive
    Flood
    Water framework directive (WFD)
    Date
    2012
    Publisher
    Elsevier
    
    Metadata
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    Abstract
    The acid-sensitive upland blanket peat catchments are important habitats for diatom assemblages. In this study, the distribution patterns of epilithic diatom assemblages in the streams of upland forested blanket peat in north-west of Ireland are presented and the associated environmental factors are discussed. A total of 43 sites in 16 rivers were sampled. Multivariate analysis highlighted alkalinity and conductivity as the main physicochemical drivers of riverine diatom assemblages. Contrary to expectations nutrients were not found to have a major influence on the diatoms. A major flood event had a significant impact on the diatom assemblage, and one year after the event, long stalked diatom taxa were still largely absent from the river, indicating that floods could be one of the important factors affecting diatom assemblages. However, the ecological status of the affected sites, as determined by the EQR, did not alter from before to after the flood. The results of this study could be applied to similar acid-sensitive upland peat forest catchments and used as the benchmark to assess the impact of forest operations and peat degradation on ecological status.
    URI
    http://hdl.handle.net/10793/746; http://dx.doi.org/10.1016/j.ecolind.2011.12.008
    Description
    NOTICE: this is the author’s version of a work that was accepted for publication in Ecological Indicators. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Ecological Indicators, [VOL18, (July 2012)] doi:10.1016/j.ecolind.2011.12.008, http://www.sciencedirect.com/science/article/pii/S1470160X11004109
    peer-reviewed
    Citation
    O'Driscoll, C., de Eyto, E., Rodgers, M., O'Connor, M., Asam, Z.-Z.-u., & Xiao, L. (2012). Diatom assemblages and their associated environmental factors in upland peat forest rivers. Ecological Indicators, 18, 443-451, doi:10.1016/j.ecolind.2011.12.008
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