Öztürk, İlayda Destan
Spatial distribution and composition of zooplankton was studied in the southern Black Sea at 46 stations in July 2013. The southern Black Sea was examined as three different study areas namely; western, central and eastern regions. Each region was also examined as inshore and offshore to determine the difference in zooplankton communities. Additionally a DNA barcoding study was also performed with samples collected from seven stations in the southern Black Sea to generate a gene library of zooplankton species of the Black Sea. A total of 19 zooplankton species were identified at species level and a further 13 species at higher taxa levels. The eastern region of the southern Black Sea displayed the lowest abundance values (average of 82,476 ind/m2) of total zooplankton compared to the central (85,008 ind/m2) and western Black Sea (average of 175,495 ind/m2). 68% of the entire zooplankton community consisted of copepods, the dominant species being Acartia clausi (65%) in terms of abundance. Copepods were followed by Noctiluca scintillans (14%) and cladocerans (7%) in terms of abundance. The total absence of N. scintillans in the eastern region was striking in July 2013. Its abundance was rather high (39,495 ind/m2) in the west decreasing towards the central southern Black Sea. Among cladoceran species Penilia avirostris was the most abundant (69%) for the entire southern Black Sea. Chaetognatha constituted 4% of the entire zooplankton community for the southern Black Sea in July 2013. In terms of biomass, the central zone exhibited the lowest fodder zooplankton values (average of 4,882 mg/m2) but the highest macro gelatinous organisms values (average of 581,329 mg/m2). Despite higher abundance values in the west, the biomass values of fodder zooplankton were quite similar in western and eastern regions of the southern Black Sea, indicating the existence of larger individuals of fodder zooplankton in the eastern zone. In this study DNA barcoding of many zooplankton species was obtained. It was found that DNA barcoding could help successful identification of 11 species of holoand mero- zooplankton species.


Distribution of phytoplankton in the southern Black Sea in summer 1996, spring and autumn 1998
Eker-Develi, E; Kıdeyş, Ahmet Erkan (2003-03-01)
The species composition, abundance, and biomass of micro- (>15 mum) and nano- (<15 mu m) phytoplankton were studied along the southern Black Sea during June-July 1996 and March-April and September 1998. A total of 150 species were identified, similar to 50% of them being dinoflagellates. The average total phytoplankton abundance changed from 77 x 10(3) Cells l(-1) in spring to 110 x 10(3) cells l(-1) in autumn and biomass from 250 mu g l(-1) in summer to 1370 mu g l(-1) in spring. Based on the extensive sam...
Spatial distribution and source identification of persistent organic pollutants in the sediments of the Yesilirmak River and coastal area in the Black Sea
Dinc, Burak; ÇELEBİ, AHMET; Avaz, Gulsen; Canl, Oltan; Guzel, Baris; EREN, BEYTULLAH; Yetiş, Ülkü (2021-11-01)
Surface sediments from the Yes,ilirmak River and the near coastal area in the Black Sea were collected using sediment traps to assess the spatial distributions of persistent organic pollutants and find their potential sources. Analyses were carried out to determine the concentrations of the persistent organic pollutants of seventeen polychlorinated dibenzo-p-dioxins and dibenzofurans, sixteen polycyclic aromatic hydrocarbons, seven polychlorinated biphenyls, and eight organochlorine pesticides using high-re...
Seasonality of zooplankton in the Southern Black Sea and genetics of Calanus Euxinus (Copepoda)
Ünal, Ebru; Kıdeyş, Ahmet; Graduate School of Marine Sciences (2002)
Seasonality and composition of zooplankton was comparatively studied at two stations (inshore and offshore) off Sinop, in southern Black Sea in 1999. Intra-specific genetic differentiation of the copepod Calanus euxinus dwelling in different layers along the water column was also investigated in samples obtained from different regions of the southern Black Sea in September 2000. A total of 64 zooplankton species were identified in the Sinop region in 1999, most of which being meroplankton. Out of these, 17 ...
Seasonal variation of the phytoplankton composition in the northern Levantine Sea
Yücel, Nebil; Uysal, Zahit; Tuğrul, Süleyman (2017-10-13)
Seasonal and spatial distribution of phytoplankton pigment composition in July & Sep 2012 and Mar & May 2013 was studied at five stations in different parts of the northern Levantine Sea from Mersin Bay to Rhodes Gyre. Total chlorophyll a concentrations varied 0.001 – 0.578 mg m-3 during the study. The highest value was measured in cyclonic Rhodes Gyre at 70 meters in Deep Chlorophyll Maximum (DCM). But, concentrations were found less than 0.1 mg m-3 in offshore waters and Rhodes Gyre. Seven phytoplankton g...
Vertical distribution of marine cyanobacteria Synechococcus spp. in the Black, Marmara, Aegean, and eastern Mediterranean seas
Uysal, Zahit (2006-01-01)
The vertical distributions of the unicellular cyanobacteria Synechococcus were studied in several highly contrasting seas: the Black Sea, Sea of Marmara, Aegean Sea, and Mediterranean Sea. Cell abundances varied significantly on both vertical and horizontal scales in all physically and spatially discrete water masses. Epifluorescence microscope cell counts from all seas clearly showed that majority of the population remains suspended in the surface-mixed layer and decreases gradually towards the base of the...
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