Toxic Cyanobacteria in the Arctic Lakes: New Environmental Challenges. A Case Study

Year-Round Presence of Microcystins and Toxin-Producing Microcystis in the Water Column and Ice Cover of a Eutrophic Lake Located in the Continuous Permafrost Zone (Yakutia, Russia)

“…In general, the seasonal dynamics of Microcystis abundance and intracellular content of MCs related tightly was proved by a rather high correlation coefficient between these parameters (r s = 0.88, р < 0.001, n = 25). Despite under-ice blooms, including Microcystis blooms, likely being a rather widespread phenomenon, especially in shallow eutrophic lakes [ 4 , 16 , 22 ], the abundance of the Microcystis population in Lake Ytyk-Kyuyol dramatically decreased in under-ice water compared to the ice-free period without Microcystis bloom-forming. Microcystis includes 65 taxonomically accepted species [ 31 ].…”

“…are occurrences on Ellesmere Island in the Canadian Arctic Archipelago [ 11 ], Franz Josef Land [ 12 ] and Taymyr peninsula [ 13 ]. Recent works reflect the presence of cyanotoxins in reservoirs of the northern and polar regions [ 14 , 15 , 16 , 17 ], where MCs were detected in the plankton of 18 Greenland lakes [ 18 ] and in the subarctic Lake Imandra of the Kola Peninsula [ 16 ].…”

Ecotoxicity Study of New Composite Materials Based on Epoxy Matrix DER-331 Filled with Biocides Used for Industrial Applications

“…The ecotoxicity of composite surfaces on metal test plates was determined using methods standard in eco-microbiology [44][45][46][47][48][49] on model systems with the typical intestinal microflora of humans and animals. The following microorganisms were used as test cultures in the model systems: probiotic strains of Lactobacillus acidophilus derived from the probiotic preparation Acidophilus Plus-Solgar (manufactured by Solgar, Inc., Leonia, NJ, USA); the Bifidobacterium bifidum strain, isolated from the probiotic preparation "Bifidumbacterinum-Biopharma" (manufacturer PJSC "BIOPHARMA", Kyiv, Ukraine); and the Escherichia coli strain isolated from the aquatic environment in vitro.…”

“…The standard method of Denisov, D. B. et al [46] was used to determine the potential of bacterial cells to activate the initial stage of biofilm formation in the study of the adhesive properties of test cultures. Based on scientific data on the composition of marine microflora [18], as an inoculum for biofilms, 18 h test cultures of microorganisms were used.…”

Laboratory growth capacity of an invasive cyanobacterium (Microcystis aeruginosa) on organic substrates from surface waters of permafrost peatlands

“…38 One such cyanobacterial species is Microcystis aeruginosa, which is the most common genus forming freshwater cyanobacterial blooms 39 and the most common genera associated with toxic blooms. 22 Its occurrence has already been noted in Arctic/subarctic settings near human activities, such as in Imandra Lake (Northern Europe) which is used as a cooling reservoir for a nuclear power plant and for technical and drinking water supply, 40 in sub-arctic lakes near Saint Petersburg, 41 in the Baltic Sea, 42 as well as in other environments, from pristine to urban areas through agricultural and industrial zones. 43 The potential presence of M. aeruginosa in Arctic and subarctic waters, the increasing number, frequency and extent of wildres in those regions, 44,45 and the favorable temperatures of surface waters reached during the summer period could lead to signicant eutrophication.…”