Responses of Aquatic Organisms to Cyanobacteria and Elodea in Microcosms.

Responses of Aquatic Organisms to Cyanobacteria and Elodea in Microcosms. Dokl Biol Sci. 2019 Sep;488(1):136-140 Authors: Verbitsky VB, Kurbatova SA, Berezina NA, Korneva LG, Meteleva NY, Makarova OS, Sharov AN, Ershov IY, Malysheva OA, Russkikh YV, Chernova EN, Borisovskaya EV Abstract The aim of the present study is investigation of the impact of mass development of cyanobacteria and Elodea on population characteristics (abundance, biomass, fecundity) and "health" parameters (the state of embryos, heart rate, and thermal resistance) of aquatic invertebrates in experiments with controlled conditions. In July-August 2018, in four variants of microcosms, the conditions were modeled characteristic of the coastal zone of the Rybinsk Reservoir in the period of mass development of cyanobacteria. Mass species were placed in microcosms of planktonic (with domination (80%) Daphnia longispina) and bottom animals (Unio pictorum, Gmelinoides fasciatus, Asellus aquaticus), as well as Elodea canadensis. In the variants with cyanobacteria, the toxic microcystins LR were revealed (24-53% of the sum of toxins, or from 6.6-66.5 μg/L). The presence of cyanobacteria (Aphanizomenon flos-aquae, Microcystis aeruginosa, and Gloeoitrichia spp.) influenced structural parameters of plankton: the quantity to green algae decreased, small-sized crustaceans increased. Influence of cyanobacteria caused reliable changes in parameters of aquatic animal from those o...
Source: Doklady Biological Sciences - Category: Biology Authors: Tags: Dokl Biol Sci Source Type: research