TY - JOUR AU - Miroshnichenko, E. S. PY - 2019/12/30 Y2 - 2024/03/29 TI - Microcystis wesenbergii (Komárek) Komárek ex Komárek, 2006 (Cyanophyceae) – a new species for the Crimean coast of the Black Sea JF - Marine Biological Journal JA - mbj VL - 4 IS - 4 SE - Notes DO - 10.21072/mbj.2019.04.4.09 UR - https://marine-biology.ru/mbj/article/view/207 SP - 93-96 AB - <p>The note describes a new species of toxic cyanobacteria <em>Microcystis wesenbergii</em> (Komárek) Komárek ex Komárek, 2006, which was discovered after the study of the periphyton community of synthetic polymeric materials during experimental vertical exposure of 45 samples of polyethylene terephthalate (PET), high-density polyethylene (HDPE), and polypropylene (PP). The experimental vertical module was located in the water column of the Karantinnaya Bay of the Black Sea near Sevastopol (44°37′23.0″N, 33°29′38.5″E) from August to September 2018, when the water temperature varied from +22.4 to +26.6 °C and water salinity – from 17 to 18 ‰. <em>Microcystis wesenbergii</em> was found at a depth of 7.6 to 9.2 m on samples of HDPE, green PET, PP, and fragments of plastic containers for polymer samples. <em>Microcystis wesenbergii</em> is a polymorphic, planktonic species that occurs in small quantities in the water column of stagnant and slowly flowing eutrophic and mesotrophic freshwater reservoirs; it is toxic, sometimes forming blooms; cosmopolitan, except subpolar regions. The species was found in complex colonies consisting of subcolonies reaching a maximum length of 3700 μm; the diameter of young spherical colonies ranged from 240 to 367 μm. The diameter of <em>M. wesenbergii</em> cells was larger than the diagnosis [(10.19 ± 0.79) μm]; the color of the cells was predominantly light brown instead of blue-green. The discovery of toxic <em>M. wesenbergii</em> in the Karantinnaya Bay of the Black Sea indicates high latent diversity of cyanobacteria in this water area.</p> ER -