Long-term monitoring emphasizes impacts of the dredging on dissolved Cu and Pb contamination along with ultraplankton distribution and structure in Toulon Bay (NW Mediterranean Sea, France) (CROSBI ID 286235)
Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija
Podaci o odgovornosti
Layglon, Nicolas ; Misson, Benjamin ; Durieu, Gaël ; Coclet, Clément ; D'Onofrio, Sébastien ; Dang, Duc Huy ; François, David ; Mullot, Jean- Ulrich ; Mounier, Stéphane ; Lenoble, Véronique ; Omanović, Dario ; Garnier, Cédric
engleski
Long-term monitoring emphasizes impacts of the dredging on dissolved Cu and Pb contamination along with ultraplankton distribution and structure in Toulon Bay (NW Mediterranean Sea, France)
A long-term monitoring during dredging and non- dredging periods was performed. Total and dissolved Cu and Pb concentrations, DGT-labile Pb, ultraphytoplankton abundance and structure were monitored at four sites: dredging site, dumping site (inside/outside of a geotextile bag) and reference site. During the reference period (non-dredging), an increasing contamination in Pb, Cu and a progressive shift from Synechococcus to photosynthetic picoeukaryotes dominance was observed from reference to dumping site. Pb concentrations were significantly higher during dredging period, pointing out sediment resuspension as Pb major source of contamination. Unlike Pb, Cu concentrations were not statistically different during the two periods. Dredging period did not impact on ultraphytoplankton abundance and structure but influence heterotrophic prokaryotes abundance. Sediment resuspension is therefore a major driver of chemical and biological qualities in Toulon Bay. Furthermore, although the geotextile bag reduces particulate transport of the dredged sediment, the transport in the dissolved phase remains a major problem.
Sediment resuspension ; Dissolved metals ; Chelex-DGT samplers ; Toulon Bay
nije evidentirano
nije evidentirano
nije evidentirano
nije evidentirano
nije evidentirano
nije evidentirano
Podaci o izdanju
156
2020.
111196
10
objavljeno
0025-326X
1879-3363
10.1016/j.marpolbul.2020.111196
Povezanost rada
Interdisciplinarne prirodne znanosti, Kemija