2 Organisms and Methods Organisms: Substantiation of Choice and Aspects of Methods Used The subjects of investigation were typical representatives of the main trophic levels and large taxa from prokaryotes to eukaryotes including cyanobacteria (Synechococcus Näg.; Stratonostoc linckia (Roth) Elenk., f. muscorum (Ag.) Elenk. = Nostoc muscorum Ag., and others), marine bacteria (Hyphomonas (ex Pongratz 1957) Moore, Weiner and Gebers 1984), green algae (Scenedesmus quadricauda Bréb., Chlorella vilgaris Beijer, Bracteacoccus minor (Chodat) Petrova, and others) diatomic algae (Thalassiosira pseudonana Hasle et Heimdal), euglena (Euglena Ehr.; Euglena gracilis Klebs), mollusks (Unio tumidus Philipsson s. lato, U. pictorum (L.) s. lato, Crassiana crassa (Philipsson). | Organisms and Methods Organisms Substantiation of Choice and Aspects of Methods Used The subjects of investigation were typical representatives of the main trophic levels and large taxa from prokaryotes to eukaryotes including cyanobacteria Synecho-coccus Nag. Stratonostoc linckia Roth Elenk. f. muscorum Ag. Elenk. Nostoc muscorum Ag. and others marine bacteria Hyphomonas ex Pongratz 1957 Moore Weiner and Gebers 1984 green algae Scenedesmus quadricauda Bréb. Chlorella vilgaris Beijer Bracteacoccus minor Chodat Petrova and others diatomic algae Thalassiosira pseudonana Hasle et Heimdal euglena Euglena Ehr. Euglena gracilis Klebs mollusks Unio tumidus Philipsson s. lato U. pictorum L. s. lato Crassiana crassa Philipsson s. lato Anodonta cygnea L. s. lato Mytilus edulis L. M. galloprovincialis Lamarck Crassostrea gigas Thunberg Limnaea stagnalis L. Mercenaria mercenaria annelids Hirudo medicinalis L. macrophytes Pistia stratiotes L. Elodea canadensis Michaux seedlings of angiosperm plants Sinapis alba L. Fagopyrum esculentum Moench Lepidium sativum L. Oryza sativa L. Camelina sativa L. Crantz Triticum aestivum L. and others . These objects were of theoretical and practical interest due to the details of their ecology their role in the ecosystems and the possibility of their use as biological resources. Diverse biological material made it possible to obtain broader and more substantiated conclusions on the possible role of synthetic surfactants as pollutants. Below we describe the justification of the choice of the objects organisms and methodological aspects of their use. The nomenclature of cyanobacteria is given according to Gollerbakh et al. 1953 of marine phytoplankton according to Tomas 1997 . The nomenclature of vascular plants of Russia and adjacent countries territories of the former USSR is given according to Cherepanov 1995 . The nomenclature of invertebrates is according to Zatsepin and Rittikh 1975 and Zatsepin et al. 1978 . Prokaryotes .
