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    Comparative assessment of single and joint effects of diuron and Irgarol 1051 on Arctic and temperate microalgae using chlorophyll a fluorescence imaging

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    Type
    Article
    Authors
    Kottuparambil, Sreejith
    Brown, Murray T.
    Park, Jihae
    Choi, Soyeon
    Lee, Hojun
    Choi, Han-Gu
    Depuydt, Stephen
    Han, Taejun
    KAUST Department
    Biological and Environmental Sciences and Engineering (BESE) Division
    Red Sea Research Center (RSRC)
    Date
    2017-02-06
    Online Publication Date
    2017-02-06
    Print Publication Date
    2017-05
    Permanent link to this record
    http://hdl.handle.net/10754/622887
    
    Metadata
    Show full item record
    Abstract
    Ship groundings and ice-breakers can cause pollution of the polar environment with antifouling biocides such as diuron and Irgarol 1051. The present study used pulse amplitude modulated fluorometry to compare single and joint toxicities of diuron and Irgarol 1051 on two freshwater taxa of microalgae (Chlorella and Chlamydomonas) originating from Arctic and temperate regions. 30min acute toxicity tests using chlorophyll a (Chl a) fluorescence revealed that Arctic strains of microalgae were more sensitive to herbicides than their temperate counterparts. Diuron and Irgarol 1051 had equal toxicities in the Arctic species, while Irgarol 1051 was more toxic (EC50=5.55–14.70μgL−1) than diuron (EC50=12.90–>40μgL−1) in the temperate species. Toxicity assessment of various mixtures of diuron and Irgarol 1051 revealed antagonistic, additive, and synergistic effects. Our data suggest that herbicides can adversely affect photosynthesis in Arctic microalgae at relatively low levels, and their impact can increase under complex mixture conditions.
    Citation
    Kottuparambil S, Brown MT, Park J, Choi S, Lee H, et al. (2017) Comparative assessment of single and joint effects of diuron and Irgarol 1051 on Arctic and temperate microalgae using chlorophyll a fluorescence imaging. Ecological Indicators 76: 304–316. Available: http://dx.doi.org/10.1016/j.ecolind.2017.01.024.
    Sponsors
    The study was financially supported by Incheon National University (2012). Thanks are due to the Editor and the anonymous reviewers for their valuable and constructive comments.
    Publisher
    Elsevier BV
    Journal
    Ecological Indicators
    DOI
    10.1016/j.ecolind.2017.01.024
    Additional Links
    http://www.sciencedirect.com/science/article/pii/S1470160X17300304
    ae974a485f413a2113503eed53cd6c53
    10.1016/j.ecolind.2017.01.024
    Scopus Count
    Collections
    Articles; Biological and Environmental Science and Engineering (BESE) Division; Red Sea Research Center (RSRC)

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