Elemental composition of particulate matter and nutrient dynamics in the Izmir Bay (Eastern Aegean)

Küçüksezgi̇n, Fi̇li̇z; Kontaş, Aynur; Altay, Oya; Uluturhan, Esin

doi:10.1016/j.jmarsys.2005.01.002

Cited by 21 publications

(16 citation statements)

References 22 publications

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“…POC concentrations in the present study are in the range of values reported from other oceanic regions (Gordon et al, 1979;Copin-Montegut and Copin-Montegut, 1983;Romankevich, 1984;Gordon and Cranford, 1985;Kucuksezgin et al, 2005). However, these POC concentrations are relatively lower than those reported earlier for the Bay (Radhakrishna et al, 1978;Bhattathiri et al, 1980;Nandakumar et al, 1987).…”

Section: Discussionsupporting

confidence: 49%

Seasonal and spatial distribution of particulate organic matter in the Bay of Bengal

Fernandes

Bhosle

Matondkar

et al. 2009

Journal of Marine Systems

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In this paper, we have assessed the temporal, spatial and depth related variation of suspended particulate organic matter (POM) in the Bay of Bengal. For this purpose, suspended particulate matter (SPM) samples were collected from eight depths (2 to 1000 m) at 9 locations in the Bay of analyzed for chlorophyll a (Chl a), particulate organic carbon (POC) and total particulate nitrogen (TPN). The surface concentrations of POC varied from 4.3 to 11.1 µM C, 3.1 to 10.9 µM C, and 4.3 to 9.0 µM C during SWM, FIM, and SPIM, respectively. The levels of SPM, and the concentrations of Chl a, and POC were relatively higher in the offshore compared to the near shore stations, especially during SWM. The POC concentration and its contribution to the SPM were higher in the surface waters, and both decreased with increasing water column depth at most of the stations. The observed decrease with depth of POC indicates heterotrophic uptake and/or dilution by inorganic material, poor in POC. This was also reflected in the C/N ratio which generally increased with water column depth. The relatively low C/N and POC/Chl a ratios, and high Chl a and % POC during the SWM and FIM indicate the presence of relatively fresh POM in the Bay during these two seasons.The observed seasonal differences in the quality of POM appears to be governed by river run-off and the physical forces such as eddies which pump nutrients into the surface waters thereby enhancing biological production.

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Section: Discussionsupporting

confidence: 49%

Seasonal and spatial distribution of particulate organic matter in the Bay of Bengal

Fernandes

Bhosle

Matondkar

et al. 2009

Journal of Marine Systems

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“…This predictive relationship is highly uncertain with 95% confidence limits of a factor of 20 in either direction (Burkhard, 2000). DOC concentrations were not measured in the present study but recently an average value of 1.1 × 10 − 6 kg L − 1 was reported for the inner Bay (Kucuksezgin et al, 2005). Even though sample specific values were not available, C w /C w,a ratios for PCBs and OCPs were approximated using their K OW values and the recently reported average DOC concentration (Eqs.…”

Section: Air-water Exchangementioning

confidence: 58%

Air–water exchange of polychlorinated biphenyls (PCBs) and organochlorine pesticides (OCPs) at a coastal site in Izmir Bay, Turkey

et al. 2008

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The air-water exchange of polychlorinated biphenyl (PCB) and organochlorine pesticides (OCPs) were investigated using paired air-water samples (n = 16) collected in July and February-March, 2005 from Guzelyali Port in Izmir Bay, Turkey. Atmospheric PCBs and OCPs were mainly in gas-phase in both periods. However, their dissolved and particle-phase water concentrations were comparable. For PCBs, 3 and 4-Cl congeners were dominant while chlorpyrifos, endosulfans and HCHs were the most abundant OCPs for all samples. Especially in summer, calculated net gas-exchange PCB fluxes were mainly volatilization from the water ranging from − 0.2 (volatilization, PCB-101) to −30.0 (volatilization, PCB-31) ng m − 2 day − 1 . For OCPs, net flux ranged from −0.03 (volatilization, cis-nonachlor) to 1568 (deposition, endosulfan I) ng m − 2 day − 1 and they have seasonal variations with generally deposition in winter and volatilization in summer. However, endosulfan I, II, endosulfan sulfate, α-and γ-HCH deposited in both periods. The calculated residence times of PCBs and OCPs in the water column indicated that the gasexchange in the Bay is at least as or a more important mechanism than advection. Annual gaseous absorption and volatilization fluxes were calculated and were used along with the estimated dry deposition fluxes and wet deposition fluxes measured recently at a suburban site in Izmir to determine the relative contributions of different atmospheric mechanisms to the pollutant inventory of the Bay water column. Results suggested that the relative contributions of all studied mechanisms to the water column PCB and OCP inventories were significant.

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“…Comparing the mean values for the winter and summer seasons, the increase was about a factor of 1.15-3.34 (for Outer Bay) and 1.32-4.99 (for MiddleInner Bays). It is suggested that the zooplankton metal concentrations increased with increasing chlorophyll-a values (Kontas et al 2004) together with high dissolved and particulate organic carbon in the summer (Kucuksezgin et al 2005). It is known that dissolved and particulate organic carbon species in seawater could be critical intermediates in controlling the fate, transport, and bioavailability of many trace metals in marine environments (Bruland et al 1991).…”

Section: Zooplanktonmentioning

confidence: 99%

Trace metals (Cu, Mn, Ni, Zn, Fe) Contamination in Marine Sediment and Zooplankton Samples from Izmir Bay. (Aegean Sea, Turkey)

Kontaş

2007

Water Air Soil Pollut

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Metal (Cu, Mn, Ni, Zn, Fe) concentrations in marine sediment and zooplankton were investigated in Izmir Bay of the Eastern Aegean Sea, Turkey. The study aimed to assess the levels of metal in different environmental compartments of the Izmir Bay. Metal concentrations in the sediment (dry weight) ranged between 4.26-70.8 μg g −1 for Cu, 233-923 μg g −1 for Mn, 14.9-127 μg g −1 for Ni, 25.6-295 μg g −1 for Zn, 12,404-76,899 μg g −1 for Fe and 38,226-91,532 μg g −1 for Al in the Izmir Bay. Maximum metal concentrations in zooplankton were observed during summer season in the inner bay. Significant relationships existed between the concentrations of certain metals (Al, Fe, Mn and Ni) in sediment, suggesting similar sources and/or similar geochemical processes controlling such metals. Higher concentrations of Cu, Zn and percent organic matter contents were found in the middle-inner bays sediments. Based on the correlation matrix obtained for metal data, organic matter was found to be the dominant factor controlling Cu and Zn distributions in the sediment. In general, mean Cu and Zn levels in the bay were above background concentrations in Mediterranean sediments.Zooplankton metal concentrations were similar to sediment distributions.

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Elemental composition of particulate matter and nutrient dynamics in the Izmir Bay (Eastern Aegean)

Cited by 21 publications

References 22 publications

Seasonal and spatial distribution of particulate organic matter in the Bay of Bengal

Seasonal and spatial distribution of particulate organic matter in the Bay of Bengal

Air–water exchange of polychlorinated biphenyls (PCBs) and organochlorine pesticides (OCPs) at a coastal site in Izmir Bay, Turkey

Trace metals (Cu, Mn, Ni, Zn, Fe) Contamination in Marine Sediment and Zooplankton Samples from Izmir Bay. (Aegean Sea, Turkey)

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