D. Klisarova, D. Gerdzhikov

Institute of Fish Resources, 9000 Varna, Bulgaria
(Manuscript received 13 August 2017; accepted for publication 3 October 2017)

Abstract. In this article have been investigated the taxonomic structure of the phytoplankton communities developing in the Black Sea area in front of the Cape Galata. For the period 2008 – 2016, relatively high species diversity was found (161 species). Throughout the most of the year dominated class Dinophyceae (up to 54.17%). The number of phytoplankton species decreased with distance from the shore, but the percentage participation of the group of peridineas and diatoms in the general taxonomic composition grew. Only in class Prymnesiophyceae increased biodiversity was registered in the high seas