Effects of the triazine herbicide, simetryn, on freshwater plankton communities in experimental ponds

agua algae bacillariophyceae chlorophylle chlorophylls clorofilas communities disponibilidad de nutrientes eau estanques fitoplancton herbicidas herbicide herbicides japan japon nutrient availability oxygen ph photosynthese photosynthesis phytoplancton phytoplankton ponds population density residues residuos simetrina simetryn toxicidad toxicity volvocales water zooplancton zooplankton