Mercury distribution in the krka river Estuary (Eastern Adriatic Coast)

Mikac, Nevenka; Kwokal, Željko; May, K.; Branica, Marko

doi:10.1016/0304-4203(89)90190-4

Cited by 39 publications

(8 citation statements)

References 21 publications

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“…The Zrmanja Estuary shows a similarity with the neighbouring Krka Estuary, with respect to the prounounced stratification (Žutić and Legović 1987) and low content of suspended inorganic and organic matter (Moreira-Turcq et al 1993;Cauwet 1991;Svensen et al 2007). The halocline provides an interface that accumulates micro-and nanophytoplankton (Viličić et al 1989;Denant et al 1991;Ahel et al 1996), bacteria (Fuks et al 1991), dissolved organic matter and detritic particles (Žutić and Legović 1987;Cauwet 1991), and pollutants (Mikac et al 1989) along the brackish water-sea water interface.…”

Section: Discussionmentioning

confidence: 95%

Phytoplankton abundance and pigment biomarkers in the oligotrophic, eastern Adriatic estuary

Viličić

Terzić

Ahel

et al. 2007

Environ Monit Assess

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Phytoplankton distribution and environmental characteristics were determined in a shallow, highly stratified and oligotrophic estuary (Zrmanja, eastern Adriatic). Samples were collected in two contrasting seasons; winter (February 2000), when river discharge was high, and in summer (July 2003), a period of drought. Phytoplankton distribution was closely related to salinity gradients, nutrient levels, and water residence time. Microscopic analysis revealed that phytoplankton was composed mainly of marine diatoms, dinoflagellates, cryptophytes, green flagellates, and coccolithophorids. The dominant biomarker pigments were fucoxanthin, alloxanthin and 19'-hexanoyloxyfucoxanthin, while lower, but indicative contributions of peridinin and chlorophyll b were also noted. Maximum abundance and biomass were found in the middle estuary in winter and in the upper estuary in summer. The estuary is mostly P-limited. Development of chain-forming marine diatoms was evident in winter. Due to the reduced nutrient input in summer, the biomass accumulated in the upper estuary (1,000 ng chlorophyll a l(-1)) was composed mostly of nanoplanktonic unicellular diatoms, nanoplanktonic marine dinoflagellates, cryptophytes, and chlorophytes. The concentrations of about 200 ng l(-1) hex-fuco, suggested that the contribution of prymnesiophytes to total biomass was comparable to that of diatoms and dinoflagellates. In the middle estuary and coastal sea, PO(4) and TIN were 3.5 times lower, resulting in a fivefold decrease in biomass (<100 ng chlorophyll a l(-1)). The oligotrophic Zrmanja and other karstic rivers discharging in the eastern Adriatic Sea, provide insufficient source of nutrients and low productivity of the eastern Adriatic Sea.

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Section: Discussionmentioning

confidence: 95%

Phytoplankton abundance and pigment biomarkers in the oligotrophic, eastern Adriatic estuary

Viličić

Terzić

Ahel

et al. 2007

Environ Monit Assess

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“…They were obtained by using different electrochemical methods and refer to Venice lagoon water samples gained in different years and different locations. Even if these measurements have been performed with the main goal of testing the suitability of the methods developed, the comparison of the data obtained outline a substantial uniformity of concentration values determined for mercury in the waters of some channels of the town of Venice; these data range between 0.3 and 6 × 10 −10 M. The majority of these values are slightly higher than the mercury concentration values measured for the coastal water of the Northern Adriatic Sea in the vicinity of Venice ((1.6 ± 0.5) × 10 −10 M [8]) and in the other neighbouring coastal areas [33][34][35]. This trend agrees with the increase of mercury concentration expected, when passing from the open sea to coastal and lagoon waters when land based mercury sources (agricultural, industrial or urban) are present in the territory [36,37].…”

Section: Lagoon Watersmentioning

confidence: 99%

Determination of mercury in process and lagoon waters by inductively coupled plasma-mass spectrometric analysis after electrochemical preconcentration: comparison with anodic stripping at gold and polymer coated electrodes

Ugo

Zampieri

Moretto

et al. 2001

Analytica Chimica Acta

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A combined electrochemical-inductively coupled plasma-mass spectrometry (EC-ICP-MS) method for the determination of trace mercury in water samples is presented. It takes advantage of the electrochemical preconcentration of mercury onto a gold spiral electrode followed by ICP-MS analysis after the electrochemical reoxidation of deposited mercury in pure supporting electrolyte. The advantages of the EC-ICP-MS approach with respect to conventional ICP-MS, are the increased sensitivity and the elimination of the effect of interfering substances eventually present in the sample.EC-ICP-MS is applied to the determination of nanomolar and subnanomolar concentrations of mercury(II) ions in real samples such as process waters (from a chlor-alkali plant) and lagoon waters (from Venice channels). Analytical performances obtained by EC-ICP-MS are discussed and compared with those obtained by anodic stripping voltammetry at gold and at Tosflex-coated glassy carbon electrodes.

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“…Box-and-whiskers plots of the geographical distribution of THg in mussels (Mytilus galloprovincialis) from the Adriatic Sea. Data from BILANDŽIĆ et al, 2016;BLOOM et al, 2004;BOGDANOVIĆ et al, 2014;CASTELLANI et al, 2015;CATTANI et al, 1999;CORSI et al, 2011;CUBADDA et al, 2006;CULLAJ et al, 2006;DA ROS et al, 2000;DOMINIK et al, 2014;FABBRI et al, 2006;FATTORINI et al, 2008;FAVRETTO et al, 1997;GIORDANO et al, 1991;GORBI et al, 2008;JOVIĆ & STANKOVIĆ, 2014;KLJAKOVIĆ-GAŠPIĆ et al, 2006;KOSTA et al, 1978;LOCATELLI, 2003;LOCATELLI & MELUCCI, 2010;LOWE et al, 1995;MAJORI et al, 1991;MARKOVIĆ et al, 2012;MARTINČIĆ et al, 1987;MIEDICO et al, 2013;MIKAC et al, , 1989MIKAC et al, , 1996MOSCHINO et al, 2016;NAJDEK & SAPUNAR, 1987;NASCI et al, 1998;ODŽAK et al, 2000;RAMŠAK et al, 2012;SPADA et al, 2013;STANKOVIĆ et al, 2011;STORELLI & MARCOTRI-GIANO, 2001;TURK et al, 2007;WIDDOWS et al, 1997;ZATTA et al, 1992;ZVONARIĆ, 1991....…”

Section: Mercury In Adriatic Musselsmentioning

confidence: 99%

“…in the Adriatic Sea. Data from BILLE et al, 2015;CASTELLANI et al, 2015;CATTANI et al, 1999;CUBADDA et al, 2006;DA ROS et al, 2000;DOMINIK et al, 2014;FABBRI et al, 2006;KLJAKOVIĆ-GAŠPIĆ et al, 2006;LOWE et al, 1995;MIKAC et al, , 1989MIKAC et al, , 1996NASCI et al, 1998;ODŽAK et al, 2000;WIDDOWS et al, 1997;ZATTA et al, 1992. Mercury speciation in tissues indicates different distribution pathways in the mussels. It appears that MeHg is transported to other tissues after uptake through digestive gland and gills (ODŽAK et al, 2000), while inorganic Hg is accumulated in the digestive gland where it is probably transformed to some less toxic form before its excretion or storage (KLJAKOVIĆ-GAŠPIĆ et al, 2006).…”

Section: Fig 9 Temporal Changes Of Thg and Mehg Concentrations And mentioning

confidence: 99%

The abundance and speciation of mercury in the Adriatic plankton, bivalves and fish – a review

Živković

Šolić

Kotnik

et al. 2017

Acta Adriat. (Online)

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This article presents an overview of available research on mercury speciation in the most studied biota of the Adriatic Sea as a specific biogeochemical subunit of the Mediterranean. We present current knowledge about mercury concentration, speciation, spatial distribution and temporal changes in plankton, bivalves and fish from the Adriatic Sea. Results from mercury speciation studies in marine organisms are used to describe the extent of mercury bioaccumulation in the Adriatic Sea. Mercury biogeochemical cycle in the Adriatic is characterised by increased mercury concentrations from the water column, through plankton, bivalves and smaller fish to predator fish species. Although the Adriatic Sea has the highest mercury concentration in the whole Mediterranean Sea, fish species at the higher trophic levels have similar mercury concentrations everywhere in the Mediterranean, indicating incomplete understanding of the transfer mechanisms of mercury from seawater to upper trophic levels. As consumption of (contaminated) food is the main route of human exposure to mercury, it is of great importance to understand the influence of mercury contamination in the Adriatic Sea.

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Mercury distribution in the krka river Estuary (Eastern Adriatic Coast)

Cited by 39 publications

References 21 publications

Phytoplankton abundance and pigment biomarkers in the oligotrophic, eastern Adriatic estuary

Phytoplankton abundance and pigment biomarkers in the oligotrophic, eastern Adriatic estuary

Determination of mercury in process and lagoon waters by inductively coupled plasma-mass spectrometric analysis after electrochemical preconcentration: comparison with anodic stripping at gold and polymer coated electrodes

The abundance and speciation of mercury in the Adriatic plankton, bivalves and fish – a review

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