A Preliminary Study on the Intense Pelagic and Benthic Mucilage Phenomenon Observed in the Sea of Marmara

In the intense mucilage formation observed in Sea of Marmara 2021, Phaeocystis pouchetii (Prymnesiophyceae) together with Skeletonema costatum, Cylindrotheca closterium, Thalassiosira rotula (Bacillariophyceae), and Gonyaulax fragilis (Dinophyceae) were detected foamy surface layer, Chrysoreinhardia giraudii Nematochrysopsis marina (Chrysophyceae), which are known to produce filamentous benthic habitat. addition, contribution these groups, a higher cell abundance (2.1×107 cells/L) chlorophyll-a value (15.9 µg/L) was reached than event experienced previous years. microscopic observations, typical dominant genera such as Protoperidinium Tripos very little terms species composition, fact that three previously unobserved became Cyanophyceae group represented by different indicated phytoplankton composition changed this period. The changing 3 make new records for point transportation ship ballast waters or inflow brackish water heavy rains. It is recommended take necessary measures control domestic industrial wastes terrestrial inputs, cause reach numerical form mucilage, carry out fisheries controlled manner, prevent discharge bilge waters.