The Influence of Reduced Light Intensity on the Response of Benthic Diatoms to Herbicide Exposure

Rebecca Wood, Simon Mitrovic, Richard Lim, Ben KEFFORD

    Research output: Contribution to journalArticle

    7 Citations (Scopus)

    Abstract

    Herbicide pollution events in aquatic ecosystems often coincide with increased turbidity and reduced light intensity. It is therefore important to determine whether reduced light intensity can influence herbicide toxicity, especially to primary producers such as benthic diatoms. Benthic diatoms collected from 4 rivers were exposed to herbicides in 48 h rapid toxicity tests under high light (100 µmol m −2 s −1) and low light (20 µmol m −2 s −1) intensities. The effects of 2 herbicides (atrazine and glyphosate) were assessed on 26 freshwater benthic diatom taxa. There was no significant interaction of light and herbicide effects at the community level or on the majority (22 of 26) of benthic diatom taxa. This indicates that low light levels will likely have only a minor influence on the response of benthic diatoms to herbicides. Environ Toxicol Chem 2016;35:2252–2260.

    Original languageEnglish
    Pages (from-to)2252-2260
    Number of pages9
    JournalEnvironmental Toxicology and Chemistry
    Volume35
    Issue number9
    DOIs
    Publication statusPublished - 1 Sep 2016

    Fingerprint

    Diatoms
    Herbicides
    light intensity
    herbicide
    diatom
    Light
    glyphosate
    Toxicity
    Atrazine
    Toxicity Tests
    Aquatic ecosystems
    Turbidity
    atrazine
    toxicity test
    Fresh Water
    Rivers
    aquatic ecosystem
    Ecosystem
    exposure
    turbidity

    Cite this

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    abstract = "Herbicide pollution events in aquatic ecosystems often coincide with increased turbidity and reduced light intensity. It is therefore important to determine whether reduced light intensity can influence herbicide toxicity, especially to primary producers such as benthic diatoms. Benthic diatoms collected from 4 rivers were exposed to herbicides in 48 h rapid toxicity tests under high light (100 µmol m −2 s −1) and low light (20 µmol m −2 s −1) intensities. The effects of 2 herbicides (atrazine and glyphosate) were assessed on 26 freshwater benthic diatom taxa. There was no significant interaction of light and herbicide effects at the community level or on the majority (22 of 26) of benthic diatom taxa. This indicates that low light levels will likely have only a minor influence on the response of benthic diatoms to herbicides. Environ Toxicol Chem 2016;35:2252–2260.",
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    The Influence of Reduced Light Intensity on the Response of Benthic Diatoms to Herbicide Exposure. / Wood, Rebecca; Mitrovic, Simon; Lim, Richard; KEFFORD, Ben.

    In: Environmental Toxicology and Chemistry, Vol. 35, No. 9, 01.09.2016, p. 2252-2260.

    Research output: Contribution to journalArticle

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    AU - Mitrovic, Simon

    AU - Lim, Richard

    AU - KEFFORD, Ben

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    AB - Herbicide pollution events in aquatic ecosystems often coincide with increased turbidity and reduced light intensity. It is therefore important to determine whether reduced light intensity can influence herbicide toxicity, especially to primary producers such as benthic diatoms. Benthic diatoms collected from 4 rivers were exposed to herbicides in 48 h rapid toxicity tests under high light (100 µmol m −2 s −1) and low light (20 µmol m −2 s −1) intensities. The effects of 2 herbicides (atrazine and glyphosate) were assessed on 26 freshwater benthic diatom taxa. There was no significant interaction of light and herbicide effects at the community level or on the majority (22 of 26) of benthic diatom taxa. This indicates that low light levels will likely have only a minor influence on the response of benthic diatoms to herbicides. Environ Toxicol Chem 2016;35:2252–2260.

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