The ecotoxicological impact assessment of neonicotinoid insecticides on diatom phototaxis
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- WATANABE Shunsuke
- 秋田県立大学生物資源科学部
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- KIKUCHI Takero
- 秋田県立大学大学院生物資源科学研究科
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- SUETSUGU Atsushi
- 秋田県立大学生物資源科学部
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- KIGUCHI Osamu
- 秋田県立大学生物資源科学部
Bibliographic Information
- Other Title
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- 珪藻の走光性に対するネオニコチノイド系殺虫剤の生態影響評価
Description
<p> The load of some pesticides into water environments is seriously concerned for its adverse effects on non-target organisms. In this study, we investigated the effects of some neonicotinoid insecticides on diatom (the primary producer in aquatic ecosystems) phototaxis. Neonicotinoids had both positive and negative effects on the phototaxis, depending on the organisms and the chemical species investigated. Imidacloprid promoted Nitzschia sp. phototaxis up to 160 mg L-1 (the highest concentration in this study), while thiacloprid decreased the relative number of cells exhibiting positive phototaxis in Nitzschia sp. and Mayamaea pseudoterrestris by up to approximately 29 % and 70 %, respectively. However, the decrease in phototaxis is unlikely at the detected concentrations in the environment. Our results suggest that phototaxis is useful as an endpoint for ecotoxicological impact assessment. The method based on counting the number of cells can evaluate the ecotoxicological impact of some neonicotinoids on diatom phototaxis and may be applied to growth inhibition evaluation in an environmental situation where light is irradiated unevenly.</p>
Journal
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- Japanese Journal of JSCE
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Japanese Journal of JSCE 79 (25), n/a-, 2023
Japan Society of Civil Engineers
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Details 詳細情報について
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- CRID
- 1390580947975150848
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- ISSN
- 24366021
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- Text Lang
- ja
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- Data Source
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- JaLC
- Crossref
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- Abstract License Flag
- Disallowed