Short term temporal & spatial fluctuations in marine cyanobacterium synechococcus abundance in oligotrophic deep shelf waters (northeastern Mediterranean)

Date

2017-01-01

Author

Uysal, Zahit

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

130
views

0
downloads

© by PSP.Abundance of picoplanktonic marine cyano-bacterium Synechococcus was monitored weekly over a year period at an oligotrophic deep shelf station in the northeastern Levantine basin (northeastern Mediterranean). In addition to abundance, ambient parameters such as; temperature, salinity, secchi disc depth, total suspended sediment, ni-trate+nitrite, phosphate, chlorophyll and phyto-plankton were also collected. Population was found most abundant during March & December (1.8 × 104 cells/ml) and June & August (1.4 × 104 cells/ml) whereas to the lowest counts were retained in October (9.6 × 103 cells/ml) and July (1.0 × 104 cells/ml). Low levels observed in July coincided with the initial phase of an extraordinary upwelling event that lasted for about 10 weeks. Average cell counts at surface (1.8 × 104 cells/ml) almost three fold that observed at 100m (6.4 × 103 cells/ml). In contrast to homogeneous temperature & salinity profiles, fluctuations in population abundance with depth was observed during winter con-vectional mixing (January & February). Abundances remained below 1.0×104 cells/ml below 50 m due to stratification observed during summer & autumn. Cell abundances ranged from a minimum of 4.9 × 103 to a maximum of 4.4 × 104 cells ml-1-1 with an annual mean level of 1.8 × 104 cells ml-1-1 at surface. At the lower part of the euphotic layer abundances ranged from a minimum of 3.0 × 102 to a maximum of 2.8 × 104 cells ml-1-1 with an annual mean level of 6.5 × 103 cells ml-1-1 at 100 m depth. Based on Spearman's rank correlation analysis, a highly significant correlation between Synechococ-cus abundance and ambient temperature was observed indicating the populations' affinity to elevated temperatures.

Subject Keywords

Northeastern Mediterranean, Levantine Basin, Temporal, Spatial, Synechococcus, Abundance

URI

https://hdl.handle.net/11511/54035

Journal

Fresenius Environmental Bulletin

Collections

Graduate School of Marine Sciences, Article

Suggestions

OpenMETU
Core

Synechococcus dynamics in the Levantine basin shelf waters (northeastern Mediterranean) Uysal, Zahit (2010-12-01) The abundance of picoplanktonic marine cyanobacteria Synechococcus was measured at weekly intervals over a period of one year in the northern Levantine basin shelf waters. Synechococcus was found more abundant during summer and early autumn and least during winter. Significant increases in abundances mostly occurred during very low nutrient concentrations either a week or two weeks after the nutrient enrichments. Cells were distributed homogenously in the water column due to intense mixing observed during w...
The annual cycle of Synechococcus (cyanobacteria) in the northern Levantine Basin shelf waters (Eastern Mediterranean) Uysal, Zahit (2006-09-01) Abundance of picoplanktonic chroococcoid marine cyanobacteria Synechococcus was monitored weekly over the year 1998 in shallow coastal waters of the northern Levantine Basin. The ambient physical, chemical and biological variables (temperature, salinity, Secchi disk depth, total suspended sediment, nitrate, phosphate, Chl a and phytoplankton) were also measured. Synechococcus was found to be more abundant during summer and early autumn and less during winter and early spring. At the surface and 15 m depth, ...
CROSS-SHELF TEMPORAL AND SPATIAL CHANGES IN BACTERIAL AND CYANOBACTERIAL (SYNECHOCOCCUS SP) ASSEMBLAGES IN THE CILICIAN BASIN (NORTHEASTERN MEDITERRANEAN) Uysal, Zahit (2019-01-01) Spatial and temporal changes in bacterial and cyanobacterial abundances were studied at three stations in monthly intervals over a period of one year in the Cilician basin shelf waters. Both populations displayed an apparent decrease in abundance with depth except winter during which a homogeneous distribution was achieved due to convectional mixing. Annual average bacterial and cyanobacterial biomass yield of the nearshore shelf station exceeded 1.8, 2.7 and 2.3, 5.4 fold of the middle and offshore station...
Spatio-temporal aerosol trace metal concentrations and sources in the Levantine Basin of the Eastern Mediterranean Koçak, Mustafa; Kubilay, N; Herut, B (2004-05-01) The current study considers the spatial and temporal variability in aerosol trace metal concentrations (Al, Fe, Mn, Cr, Cu, Pb, Cd, Zn) in the Levantine Basin of the Eastern Mediterranean, utilising an extensive sample library (n = 621) collected between 1999 and 2001, at two coastal sites located at the northern, Erdemli (Turkey) and southeastern, Tel Shikmona (TS, Israel), region of the Basin. A critical evaluation of the datasets from the two locations was presented. Enhanced concentrations of Al (1.7 x)...
Chemical composition of the fine and coarse fraction of aerosols in the northeastern Mediterranean Koçak, Mustafa; Kubilay, Nilguen (2007-11-01) Two-stage aerosol samples (PM10-2.5 and PM2.5) were collected at a coastal rural site located in the northeastern Mediterranean, between April 2001 and 2002. A total of 562 aerosol samples were analyzed for trace elements (Fe, Ti, Mn, Ca, V, Ni, Zn, Cr) and water-soluble ions (Na+, NH4+, K+, Mg2+, Ca2+, Cl-, Br-, NO3-, SO42-, C2O42- and 3 4 4 MS-:methane sulfonate). PM10, crustal elements, sea salt aerosols and NO3- were mainly associated with the coarse mode SO42-, C2O42-; whereas non-sea salt (nss) SO42-,...

Citation Formats

Z. Uysal, “Short term temporal & spatial fluctuations in marine cyanobacterium synechococcus abundance in oligotrophic deep shelf waters (northeastern Mediterranean),” Fresenius Environmental Bulletin, pp. 5115–5124, 2017, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/54035.