Metal(loid) accumulation and ecotoxicological assessment in cartilaginous fishes from the Northeastern Mediterranean
Çiftçi, Nuray | AYAS, Deniz
The present study was conducted with the objective of ascertaining the levels of selected metal(loid)s in the muscle, liver, spleen, kidney, stomach, intestinal, and gonad tissues of seven distinct cartilaginous species sampled from Northern Cyprus. This initiative was undertaken to address the dearth of metal bioaccumulation data for cartilaginous species and to elucidate the impact of metal pollution on these species, which are distinguished by their limited reproductive capacity. The samples were obtained from discarded species captured during commercial fishing activities. The metal concentrations in these tissues were subsequently determined using Inductively Coupled Plasma Mass Spectrophotometry (ICP-MS). The results indicated that the kidney tissue of Squalus blainville exhibited th...
Phytoplankton and pigment composition during an Emiliania huxleyi bloom in the Black Sea
Eker-Develi, Elif
Alterations in composition and carbon biomass of phytoplankton community are closely related to seasonal variations, anthropogenic inputs and ultimately climatic changes in a longer perspective. Accuracy of the collected data is important to determine changes occurring in phytoplankton community composition. An intercomparison exercise of haptophyte abundance obtained by microscopy was performed by three research laboratories based on samples taken from 2 to 11 June 2016, in the western and central Black Sea. Total carbon biomass of phytoplankton groups was estimated by one of the three laboratories based on microscopy. Phytoplankton group composition was also determined with marker pigments. Carbon biomass of large sized diatoms and dinoflagellates was correlated with CHEMTAX deri...
Distribution of heavy metals in surface sediments of a Coastal Lagoon (Akyatan Lagoon, Northeastern Mediterranean Sea): Ecological and potential health risk assessment
Özbay, Özgür | Akçay, İsmail | Alp, Mehmet Tahir
Coastal lagoons are highly enriched by heavy metals due to various natural and anthropogenic pressures. Sediment heavy metal pollution status and potential health risk assessment of the Akyatan Lagoon were determined from the seasonally obtained sediment samples between January 2022 and October 2022. The heavy metal concentrations in surface sediments of the Akyatan Lagoon ranged between 25.73 and 70.87 g/kg for Al, 10.28–31.03 mg/kg for Co, 0.11–1.42 mg/kg for Cd, 56.22–181.64 mg/kg for Cr, 10.06–34.16 mg/kg for Cu, 13.94–43.39 g/kg for Fe, 361.45–1118.82 mg/kg for Mn, 61.53–209.42 mg/kg for Ni, 9.46–34.43 mg/kg for Pb, and 19.57–117.42 mg/kg for Zn, respectively. The calculated ecological risk indices showed moderate Co, Cd, Cr, Ni, and Pb contamination for surface sediments of the Akyat...