New record of the heterotrophic Ebridian microflagellate Hermesinium adriaticum Zach. in the eutrophic Izmir Bay (Aegean Sea, Turkey)
Nihayet Bizsel, Sükran Cirik
Dokuz Eylul University, Institute of Marine Science and Technology, No 10, 35340 lnciraltı, lzmir, TURKEY
Hermesinium adriaticum ZACH. 1906, as a rare non-photosynthetic flagellate was identified for the first time in the eutrophic Izmir Bay and along the coasts of Turkey, i.e., southern Black Sea, eastern Mediterranean Sea and Aegean Sea. It has internal siliceous skeleton. For the first time in Izmir Bay, it was found in the surface water (up to max. 14.250 cells/I) during the sampling in September 1998 in the Middle and Outer Bay when the water temperature was maximum. Water quality parameters in September 1998 were also recorded and presented to elucidate in which the conditions presumably favored by Hermesinium adriaticum. In contrast to H adriaticum, another ebridian species; Ebria tripartita was observed (up to max. 410.150 cells/I) throughout the bay not only in September but also in April and November 1998 without showing any correlation with temperature.
Keywords: Hermesinium adriaticum, Ebria tripartita, eutrophication, Izmir Bay, new record, Aegean Sea