Evaluation of spatial and temporal variations of inorganic nutrient species in the eastern Aegean Sea waters

Aydin-Onen, S.; Koçak, Ferah; Küçüksezgi̇n, Fi̇li̇z

doi:10.1016/j.marpolbul.2012.08.032

Cited by 20 publications

(12 citation statements)

References 14 publications

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“…A value of 30.20 ± 0.09 μM (1SD, n = 6) with a relative standard deviation (RSD) of 0.31% for dissolved silicate was obtained in MOOS-3 seawater, in good agreement with the certified value of 30.5 ± 0.8 μM ( U , k = 2), confirming the accuracy of the proposed method. A detection limit of 0.004 μM (0.11 ng g –1 as Si) was estimated for the dissolved silicate, based on three times the standard deviation of the measured analyte concentrations in three blanks normalized to 15 g subsamples used for MOOS-3 seawater and 100 μL injection volume, superior to those reported in previous studies. ,,,, …”

Section: Resultsmentioning

confidence: 78%

“…Furthermore, methods with highest possible precision and accuracy are required for the production of high quality CRMs. In this vein, to complement the classic colorimetric methods ,− for the determination of phosphate, silicate, nitrite, and nitrate, alternative methodologies have been developed over the past decade. For example, Pagliano et al recently reported a gas chromatography/mass spectrometry (GC/MS) method for the accurate and precise determination of nitrite and nitrate in seawater with relative combined uncertainties of 2.5 and 0.7%, respectively, using exact matching double spike isotope dilution and derivatization with triethyloxonium tetrafluoroborate.…”

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confidence: 99%

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Direct Determination of Dissolved Phosphate and Silicate in Seawater by Ion Exclusion Chromatography Sector Field Inductively Coupled Plasma Mass Spectrometry

Yang

Mester

2014

Anal. Chem.

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Access and use of this website and the material on it are subject to the Terms and Conditions set forth at Direct determination of dissolved phosphate and silicate in seawater by ion exclusion chromatography sector field inductively coupled plasma mass spectrometry Yang, L.; Pagliano, E.; Mester, Z. NRC Publications Record / Notice d'Archives des publications de CNRC:http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/ctrl?action=rtdoc&an=21272119&lang=en http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/ctrl?action=rtdoc&an=21272119&lang=fr READ THESE TERMS AND CONDITIONS CAREFULLY BEFORE USING THIS WEBSITE.http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/jsp/nparc_cp.jsp?lang=en Vous avez des questions? Nous pouvons vous aider. Pour communiquer directement avec un auteur, consultez la première page de la revue dans laquelle son article a été publié afin de trouver ses coordonnées. Si vous n'arrivez pas à les repérer, communiquez avec nous à PublicationsArchive-ArchivesPublications@nrc-cnrc.gc.ca.

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Section: Resultsmentioning

confidence: 78%

mentioning

confidence: 99%

Direct Determination of Dissolved Phosphate and Silicate in Seawater by Ion Exclusion Chromatography Sector Field Inductively Coupled Plasma Mass Spectrometry

Yang

Mester

2014

Anal. Chem.

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“…The values of seawater nitrate (NO 3 -), nitrite (NO 2 -), ammonium (NH 4 + ), dissolved inorganic phosphorus (PO 4 3-) and dissolved inorganic silicate (DSi) were measured with a Skalar nutrient autoanalyzer using the standard colorimetric methods according to Aydin-Onen et al (2012). The detection limits were 0.02, 0.02, 0.03, 0.01 and 0.02…”

Section: Sample Preparation and Analysismentioning

confidence: 99%

Geochemistry of organic carbon in surface sediments of a summer hypoxic region in the coastal waters of northern Shandong Peninsula

Yang

Gao

Xing

2018

Continental Shelf Research

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The geochemistry of sedimentary organic matter (SOM) in coastal areas is complex due to its multiple sources and intricate hydrological features. In this study, the biogenic element concentrations and stable carbon (δ 13 C) and nitrogen (δ 15 N) isotopic compositions in the coastal surface sediments of northern Shandong Peninsula, along with some parameters related to water quality, were analyzed to investigate the temporal-spatial variations in SOM and the processes that control its distribution. The results revealed that marine autogenous organic matter is a major contributor to SOM, accounting for 75.4 ± 3.3%, 60.8 ± 6.6% and 67.4 ± 10.3% in August and November 2015 and March 2016, respectively. In summer, TOC and TN concentrations were significantly higher than those in autumn and spring. The relatively high abundances of SOM were found in the offshore areas in summer and spring, which was contrary to those in autumn. Riverine discharge, nutrients, primary productivity and dissolved oxygen (DO) dynamics could all influence the composition and contents of SOM in different seasons. In summer, high primary productivity and hypoxia condition led to high SOM values. In comparison, SOM contents were relatively low due to sufficient DO in bottom water in autumn and spring. Dissolved nutrients in seawater could affect the accumulation of autogenous organic matter by impacting upon primary production. In summer, nitrate in surface water had the most obvious effects on autogenous organic carbon (AOC) and may be the principal factor of limiting the growth of phytoplankton. In autumn, nitrate as well as dissolved silicate had more effects on AOC storage. However, phosphate had the most obvious influence on AOC storage in spring.

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“…But, they are lower than those found in aquaculture farms in the Mediterranean Sea. High concentrations of nutrients in waters have been reported in Aegean Sea (Aydin-Onen et al, 2012), where nitrate levels are 7 μmol -1 ; nitrite 1.5 μmol -1 and phosphate 6.8 μmol -1 .…”

Section: Enrichment By Nutrients To the Water Columnmentioning

confidence: 99%

“…The quality of surface waters is a very sensitive issue, and it is affected by various physicochemical factors such as temperature, pH, salinity, conductivity, dissolved oxygen, other dissolved gases, rainfall, turbidity, transparency, and nutrients (Aydin-Onen et al, 2012).…”

Section: Enrichment By Nutrients To the Water Columnmentioning

confidence: 99%

Environmental Effects of A Marine Fish Farm of Sea Bass and Sea Bream in The Eastern Mediterranean Sea on Water Column and Sediment

Ennouri¹,

Mili²,

Missaoui

2020

Marit. Technol. Res.

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Concentration of selected Metallic Element Contaminants (MECs) (Cd, Pb, Hg,Cu, Fe, Zn, Mn, Mg, Ca, Na and K), Total Organic Carbon (TOC) and Total Nitrogen (TN) in the superficial layer of sediments from four fish farms in the Eastern Mediterranean Sea were studied in order to evaluate the environmental effects of marine aquaculture and to establish correlations between aquaculture and accumulation of selected Metallic Elements Contaminants (MECs)(Cd, Pb, Hg, Cu, Fe, Zn, Mg, Mn, K, Na and Ca). The levels of nutrients (Nitrate (NO3, Nitrite (NO2), Ammonium (NH4), Phosphate (PO4), Silicate (Si), Total Nitrogen (TN) and Total Phosphorus (TP) in the water column was evaluated. The concentrations of Cd, Pb and Cu were determined by atomic absorption spectrophotometry with graphite furnace and Zeeman correction (Varian 220 Z). The Metallic Element Fe, Zn, Mg, Mn, K, Na and Ca were measured by the flame atomic absorption spectrophotometry (Varian AA 10). Hg was analyzed by Direct Analyzer of Mercury. Nutrients analyses were carried out by Autoanalyzer using the standard colorimetric methods according to Strickland and Parsons. The results suggested that MECs enrichment in the sediments may be attributed to the fish farm effluents, although metal concentrations are not likely to cause harmful effects in the marine ecosystem. Continuous monitoring and further studies of the area are recommended to determine long-term effects. The nutrient levels in the water column can be due to sources arising from various anthropogenic activities within the study area. Moreover, the spatial variability was due to increasing nutrient concentrations at the localities close to nonpoint sources.

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Evaluation of spatial and temporal variations of inorganic nutrient species in the eastern Aegean Sea waters

Cited by 20 publications

References 14 publications

Direct Determination of Dissolved Phosphate and Silicate in Seawater by Ion Exclusion Chromatography Sector Field Inductively Coupled Plasma Mass Spectrometry

Direct Determination of Dissolved Phosphate and Silicate in Seawater by Ion Exclusion Chromatography Sector Field Inductively Coupled Plasma Mass Spectrometry

Geochemistry of organic carbon in surface sediments of a summer hypoxic region in the coastal waters of northern Shandong Peninsula

Environmental Effects of A Marine Fish Farm of Sea Bass and Sea Bream in The Eastern Mediterranean Sea on Water Column and Sediment

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