Turkish Journal of Fisheries and Aquatic Sciences
2015, Vol 15, Num, 3 (Pages: 465-469)
Geographic Variation of Picocyanobacteria Synechococcus spp. along the Anatolian Coast of the Black Sea during the Late Autumn of 2013
A. Muzaffer Feyzioğlu 1 ,Coşkun Eruz 1 ,İlknur Yıldız 1
1 Karadeniz Technical University, Faculty of Marine Science, 61530 Çamburnu, Trabzon, Turkey
DOI :
10.4194/1303-2712-v15_2_33
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Picoplankton are particularly small phytoplankton with sizes between 0.2 and 2 μm and mostly include chroococcoid
cyanobacteria, Synechococcus spp. They are major contributors to the total autotrophic biomass in the oceans. The
importance of this group has increased in recent years. The aim of the study is to determine the geographic variation of
picoplanktonic Synechoccocus spp. biomass along the Anatolian coast during late autumn. The sampling program was carried
out from October 15 and 11 November 2013. Sample were collected from surface water of 57 station which were located
between the coast line and 15 miles off between İğneada-Hopa. Physico-chemical properties of sea water like temperature
(°C), salinity (ppt), sigma-t, conductivity (S m-1) and Dissolved Oxygen (mg L-1) were also collected from each station with
Sea & Sun Tech M75 CTD profiler. Autotrophic picoplanktonic cells were counted by using ACCURY C6 flowcytometer.
Results were given as cells ml-1. Sea surface temperature ranged between 16.2 °C - 18.2° C. Stagnated water was observed
from surface to 20 m and thermocline developed between 35-60 m. Our results showed that picoplankton concentrations
increased in recent years in the coastal area of Southern Black Sea. The lowest and the highest Synechococcus spp.
concentrations were found as 7.4x103 cells ml-1 and 9.2 x104 ml-1 in Şile off and mouth of Kızılırmak River respectively. The
results indicate that Şile and Kızılırmak area shown different picoplanktonic structure among the other sampling region.
Keywords :
Black Sea, picoplankton, Synechococcus spp., flowcytometer