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  • Phycocyanin sensors as an early warning system for cyanobacteria blooms concentrations: a case study in the Rotorua lakes

    Author(s)
    Cotterill, Vanessa
    Hamilton, David P
    Puddick, Jonathan
    Suren, Alastair
    Wood, Susanna A
    Griffith University Author(s)
    Hamilton, David P.
    Year published
    2019
    Metadata
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    Abstract
    Cyanobacterial blooms pose health risks to recreational water users. In New Zealand, cyanobacteria biovolumes are used to assess risk, but analyses can be time-consuming and costly. In this study, measurements from a handheld phycocyanin sensor (Cyclops-7, Turner Designs, USA) were compared with biovolumes from five lakes and a river in the Rotorua district over two years (2016, n = 121; 2017, n = 63). In the laboratory, relationships between sensor phycocyanin and biovolumes were assessed for four species to investigate precision and detection limits. The relationship between phycocyanin and biovolume was generally weak ...
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    Cyanobacterial blooms pose health risks to recreational water users. In New Zealand, cyanobacteria biovolumes are used to assess risk, but analyses can be time-consuming and costly. In this study, measurements from a handheld phycocyanin sensor (Cyclops-7, Turner Designs, USA) were compared with biovolumes from five lakes and a river in the Rotorua district over two years (2016, n = 121; 2017, n = 63). In the laboratory, relationships between sensor phycocyanin and biovolumes were assessed for four species to investigate precision and detection limits. The relationship between phycocyanin and biovolume was generally weak (<R2 = 0.4) and varied among lakes and years, except at high biovolumes. Precision and detection limits differed among species. The biovolume detection limit derived from relationships with phycocyanin was above alert level thresholds for two of the four cyanobacteria species assessed. The phycocyanin sensor that was tested likely has limited utility but may be useful for on-site confirmation of exceedances of alert level thresholds corresponding to when authorities should immediately issue health warnings.
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    Journal Title
    New Zealand Journal of Marine and Freshwater Research
    DOI
    https://doi.org/10.1080/00288330.2019.1617322
    Note
    This publication has been entered into Griffith Research Online as an Advanced Online Version.
    Subject
    Earth sciences
    Environmental sciences
    Biological sciences
    Publication URI
    http://hdl.handle.net/10072/386396
    Collection
    • Journal articles

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