Akvatická ekotoxikologie Ekosystémová ekotoxikologie •Produkce/ hrubý příjem jako ekologický parametr toku energie •Relative frequency of the use of specific structural parameters to characterize the responses of phytoplankton, periphyton, and macrophytes, respectively (Co=Composition of lowest practical taxon; Ch=Chlorophyll-a; Bi=Biomass; Ab=Abundance; Si=Similarity index; Div=Diversity index; Sd=Spatial distribution. •Relative frequency of the use of specific structural parameters to characterize the responses of zooplankton, macro-invertebrates and fish, respectively (Co=Composition at lowest practical taxon; Bi=Biomass; Ab=Abundance; Flg=Functional feeding groups, food choice and diet; Si=Similarity index; Di=Diversity index; Ds=Demographic characteristics; Sd=Spatial distribution). •Numbers of experiments in which structural aspects of different (sub)communities have been studied, in the three types of aquatic (model) ecosystem discerned. (Mo=Microorganisms; Ph=Phytoplankton; Pe=Perinhyton; M=Macrophytos; Zo=Zooplankton; Mi=Macro-invertebrates, Fi=fish) • •Komponenty standardního akvatického mikrokosmu •Design experimentu ovlivní spektrum sledovaných organismů •Taxa, volumes and endpoints appropriate for tests of circa three to six month duration in aquatic experimental ecosystem used in testing the fate and effects of agricultural chemicals. Taxa richness may be supplemented by indices or diversity, dominance and similarity. Chl a is chlorophyll a. From SETAC•Europe, "Testing Procedures tor Pesticides in Freshwater Static Mesocosms," Monks Wood Experimental Station, • •Taxa, volume and endpoints appropriate for tests of circa one-month duration in aquatic experimental ecosystems used in testing the fate and effects of agricultural chemical. LC50 is the lethal concentration for a 50% reduction in test organisms. EC50 is an effective concentration, typically used for behavioral endpoint • •Schematic diagram of the lentic mesocosm ponds at the Water Research Field Station of the University of North Texas. Smaller circles represent the location of fiberglass microcosm test systems