Metal and metallothionein levels in zoopankton in relation to environmental exposure: spatial and temporal variability (Saronikos Gulf, Greece)
2021
Strogyloudi, E. | Paraskevopoulou, V. | Campillo-González, Juan Antonio | Zervoudaki, Soultana | Bouga, V. | Catsiki, V.A. | Dassenakis, E. | Kraskapoulou, E.
Metal and metallothionein (MT) in mixed zooplankton were investigated as means of monitoring metal availability regarding environmental exposure. Spatial and temporal variability of Cd, Cu, Ni, Zn, Fe, Mn and Pb in zooplankton and seawater were studied in Saronikos Gulf (Aegean Sea, Eastern Mediterranean), once every second month during an annual cycle (2011–2012). Particulate organic carbon and chlorophyll α were also measured in seawater samples. Median zooplankton metal concentrations were 0.65, 32.4, 7.1, 864, 1420, 40.2 and 26.8 μg g-1 dw for Cd, Cu, Ni, Zn, Fe, Mn and Pb, respectively, and 109 μg g-1 ww for MTs. Metal levels in zooplankton and MTs were higher at sites influenced by human-derived pressures. Additionally, metal concentrations in pelagic fish flesh from the Greek MED-POL data base were used for bioconcentration and biomagnification factors calculation. Bioconcentration from water to zooplankton was higher than metal transfer from either seston to zooplankton or zooplankton to fish.
Mostrar más [+] Menos [-]The work presented in the present article was supported by the “Monitoring of the Saronikos Gulf ecosystem under the influence of the Psittalia sewage outfall” project of the HCMR, financed by the Athens Water Supply and Sewerage Company (EYDAP S.A.), Greece.
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