CROSS-SHELF TEMPORAL AND SPATIAL CHANGES IN BACTERIAL AND CYANOBACTERIAL (SYNECHOCOCCUS SP) ASSEMBLAGES IN THE CILICIAN BASIN (NORTHEASTERN MEDITERRANEAN)

Date

2019-01-01

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

190
views

0
downloads

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 stations, respectively. Both populations have been found most abundant during summer and least during winter in the entire shelf. Based on seasonal water column averages of both abundance and biomass, summer was followed by autumn, spring and winter in decreasing order. Cyanobacteria Synechococcus spp. was found more abundant at or near surface waters with elevated temperatures during the summer. In general, bacterial biomass exceeded the cyanobacterial biomass in the water column throughout the year. Cyanobacterial abundance and biomass have positively correlated with bacterial abundance and biomass, water temperature, photosynthetic active radiation (PAR), particulate organic carbon (POC) and particulate organic nitrogen (PON), and negatively with depth, density, in-situ fluorescence, nitrate and dissolved oxygen (DO) at midshelf. Similarly, bacterial numbers and biomass have displayed significant positive correlations with water temperature, cyanobacterial abundance and biomass, particulate organic carbon (POC), particulate organic nitrogen (PON) and photosynthetic active radiation (PAR), and negative correlation with depth, density, dissolved oxygen (DO) and nitrate in the offshore station.

Subject Keywords

Bacteria, Cyanobacterium synechococcus sp., Abundance, Stratification, Cilician basin, Northeastern Mediterranean

URI

https://hdl.handle.net/11511/54537

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...
Short term temporal & spatial fluctuations in marine cyanobacterium synechococcus abundance in oligotrophic deep shelf waters (northeastern Mediterranean) Uysal, Zahit (2017-01-01) © 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 & ...
Seasonal and spatial variation of bacterial production and abundance in the northern Levantine Sea YUCEL, N. (National Documentation Centre (EKT), 2017-3-13) Spatial and temporal heterogeneity in bacterial production and abundance in relation to ambient bio-physicochemical parameters has been investigated in the Levantine Sea. Five stations with different trophic states in an area extending from highly eutrophic Mersin bay to the mesotrophic Rhodes gyre area including the oligotrophic offshore waters were sampled four times. Integrated bacterial production varied between 6.1 and 90.3 g C m(-2) d(-1) with higher rates occurring during September 2012 in offshore w...
Temporal variability of atmospheric trace element concentrations over the eastern Mediterranean Sea GÜLLÜ, GÜLEN; Ölmez, İlhan; Tuncel, Süleyman Gürdal (2000-07-01) Concentrations of elements and ions measured in aerosol samples collected between March 1992 and December 1993 were investigated to understand temporal variability of elemental concentrations. Collected samples were analyzed by atomic absorption spectrometry, instrumental neutron activation analysis, ion chromatography and colorimetry for approximately 40 elements and major ionic species. Concentrations of elements were found to vary greatly on time scales ranging from days to seasons. Short-term variations...
SPATIAL VARIATIONS OF PARTICULATE ORGANIC MATTER (POM) COMPOSITION AND CONCENTRATIONS IN SURFACE WATERS AND SEDIMENTS OF THE MERSIN BAY Akçay, İsmail; Tuğrul , Süleyman; Department of Oceanography (2015-10-05) Spatial and temporal variations of hydrophysical properties (temperature, salinity, density), eutrophication-related parameters (nutrients, Chl-a, dissolved oxygen) and particulate organic matter (POM) concentrations and composition (C/N/P) in water column and surface sediments were examined at 33 stations between April 2014 and February 2015 in Mersin Bay located at northeastern (NE) Mediterranean. Regional and seasonal distributions of nutrients in the Mersin Bay are affected by human-induced pressures. ...

Citation Formats

Z. Uysal, “CROSS-SHELF TEMPORAL AND SPATIAL CHANGES IN BACTERIAL AND CYANOBACTERIAL (SYNECHOCOCCUS SP) ASSEMBLAGES IN THE CILICIAN BASIN (NORTHEASTERN MEDITERRANEAN),” FRESENIUS ENVIRONMENTAL BULLETIN, pp. 8583–8590, 2019, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/54537.