Surviving in a changing ocean. Tolerance to acidification might affect the susceptibility of polychaetes to chemical contamination
2022
Munari, Marco | Chiarore, Antonia | Signorini, Silvia Giorgia | Cannavacciuolo, Antonio | Nannini, Matteo | Magni, Stefano | Binelli, Andrea | Gambi, M. C. (Maria Cristina) | Della Torre, Camilla
This study aimed to assess the combined effects of ocean acidification (OA) and pollution to the polychaete Syllis prolifera inhabiting the CO₂ vent system of the Castello Aragonese (Ischia Island, Italy). We investigated the basal activities of antioxidant enzymes in organisms from the acidified site and from an ambient-pH control site in two different periods of the year. Results showed a limited influence of acidified conditions on the functionality of the antioxidant system. We then investigated the responsiveness of individuals living inside the CO₂ vent compared to those from the control to face exposure to acetone and copper. Results highlighted a higher susceptibility of organisms from the vent to acetone and a different response of antioxidant enzymes in individuals from the two sites. Conversely, a higher tolerance to copper was observed in polychaetes from the acidified-site with respect to controls, but any significant oxidative stress was induced at sublethal concentrations.
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