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 of the control: thermal resitance of mollusks and amphipods decreased, time of restoration of heart rate after loads (salinity test) in mollusks increased; in amphipods, individual fecundity decreased, frequency of abnormalities and of mortality of embryos increased. The presence of Elodea intensified these effects. Thus, mass development of cyanobacteria and Elodea influences ecological-physiological parameters of aquatic animals, decreasing their adaptivity to natural stresses and deteriorating the quality of the progeny.

中文翻译：

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缩影中水生生物对蓝细菌和伊乐藻的反应。

本研究的目的是调查蓝细菌和伊乐藻的大量发育对水生无脊椎动物种群特征（丰度，生物量，繁殖力）和“健康”参数（胚胎状态，心率和热阻）的影响。在受控条件下进行实验。在2018年7月至8月的四个缩影中，对蓝细菌大规模发展时期雷宾斯克水库海岸带的特征进行了建模。将大量物种置于浮游动物（占主导地位（80％）水蚤（Daphnia longispina））和底层动物（Unio pictorum，Gmelinoides fasciatus，Asellus aquaticus）以及加拿大伊乐藻的缩影中。在具有蓝细菌的变体中，显示出了毒性微囊藻毒素LR（占毒素总量的24-53％，或从6.6-66.5μg/ L）。蓝藻的存在（Aphanizomenon flos-aquae，Microcystis aeruginosa和Gloeoitrichia spp。）影响了浮游生物的结构参数：绿藻数量减少，小型甲壳类动物增加。蓝细菌的影响使水生动物的参数与对照相比发生了可靠的变化：软体动物和两栖动物的热阻降低，软体动物负荷（盐度测试）后恢复心率的时间增加；在两栖动物中，个体繁殖力下降，异常发生频率和胚胎死亡率增加。Elodea的存在增强了这些作用。因此，蓝细菌和伊乐藻的大量发育影响了水生动物的生态生理参数，降低了它们对自然胁迫的适应性，并降低了后代的质量。