Mar Pollut Bull 2021 Jun 18;170:112619. Epub 2021 Jun 18.
UMR6539 LEMAR-Laboratory of Environmental Marine Sciences, CNRS/University of Brest/Ifremer/IRD, European Institute for Marine Studies (IUEM), Plouzané, France; UMR7266 LIENSs-Littoral, Environnement et Sociétés, CNRS/University of La Rochelle, Institute for Coastal and Environmental Research (ILE), La Rochelle, France. Electronic address:
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 μg L had no obvious effect on MPB vertical migration during 24 h indicated by consistent rhythm. Low concentration of 10 μg L diuron had no significant influence on MPB photosynthesis throughout, however, high concentrations of 40, 50, and 60 μg L had significant impacts exhibited by decreased parameters of maximum relative electron transport rate (rETR), maximal PS II quantum yield (F/F) and non-photochemical quenching (NPQ). Read More