Diuron effects on photosynthesis and vertical migration of microphytobenthos: Potential rapid bioassessment of herbicide toxicity in coastal sediments

MARINE POLLUTION BULLETIN

卷:170

Article

Du, Guo-Ying¹  Zhong, Xue-Feng¹  Dupuy, Christine³  Che, Shuai¹  Lavaud, Johann^2,3 

[1] Ocean Univ China, Coll Marine Life Sci, MOE Key Lab Marine Genet & Breeding, Qingdao, Peoples R China

[2] CNRS Univ Brest Ifremer IRD, UMR6539 LEMAR Lab Environm Marine Sci, European Inst Marine Studies IUEM, Plouzane, France

[3] CNRS Univ La Rochelle, UMR7266 LIENSs Littoral Environm & Soc, Inst Coastal & Environm Res ILE, La Rochelle, France

关键词: Microphytobenthos;    Photosynthesis;    Vertical migration;    Diuron;    Herbicide toxicity;    Bioassessment;   

DOI  :  10.1016/j.marpolbul.2021.112619

来源: Elsevier

【 摘 要 】

The effects of herbicide diuron on photosynthesis and vertical migration of intertidal microphytobenthos (MPB) assemblages were investigated using chlorophyll fluorometry. The results shown diuron < 60 mu g L-1 had no obvious effect on MPB vertical migration during 24 h indicated by consistent rhythm. Low concentration of 10 mu g L-1 diuron had no significant influence on MPB photosynthesis throughout, however, high concentrations of 40, 50, and 60 mu g L-1 had significant impacts exhibited by decreased parameters of maximum relative electron transport rate (rETRmax), maximal PS II quantum yield (Fv/Fm) and non-photochemical quenching (NPQ). For middle concentrations of 20 and 30 mu g L-1, above decreased 3 parameters recovered sooner or later after 2 h or 16.5 h. Comparatively, rETRmax, Fv/Fm and NPQ are concentration dependent and more sensitive than other parameters in assessing diuron toxicity. This study revealed the potential of using MPB assemblages and chlorophyll fluorometry for rapid assessing diuron toxicity in coastal sediments.

【 授权许可】

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