Effects of environmental concentrations of the fragrance amyl salicylate on the mediterranean mussel Mytilus galloprovincialis

Bernardini, Ilaria; Fabrello, Jacopo; Vecchiato, Marco; Ferraresso, Serena; Babbucci, Massimiliano; Peruzza, Luca; Rovere, Giulia Dalla; Masiero, Laura; Marin, María Gabriella; Bargelloni, Luca; Gambaro, Andrea; Patarnello, Tomaso; Matozzo, Valerio; Milan, Massimo

doi:10.1016/j.envpol.2022.119502

Cited by 5 publications

(2 citation statements)

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“…Although the sediments collected at this site showed the lowest concentrations of industrial chemicals among the sediments collected in the Canal Vittorio Emanuele III, we can speculate that some molecular changes occurring in clams exposed to these sediments could be related to the presence of other chemicals not studied in the present project. Indeed, urban emissions from the city of Venice, which in some places lacks adequate wastewater treatment facilities, can lead to relevant concentrations of several contaminants such as fragrances [ 80 , 81 ], agricultural products (e.g. glyphosate), drugs (e.g.…”

Section: Discussionmentioning

confidence: 99%

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Contaminants from dredged sediments alter the transcriptome of Manila clam and induce shifts in microbiota composition

Bernardini,

Quagliariello,

Peruzza

et al. 2023

BMC Biol

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Background The reuse of dredged sediments in ports and lagoons is a big issue as it should not affect the quality and the equilibrium of ecosystems. In the lagoon of Venice, sediment management is of crucial importance as sediments are often utilized to built-up structures necessary to limit erosion. However, the impact of sediment reuse on organisms inhabiting this delicate area is poorly known. The Manila clam is a filter-feeding species of high economic and ecological value for the Venice lagoon experiencing a drastic decline in the last decades. In order to define the molecular mechanisms behind sediment toxicity, we exposed clams to sediments sampled from different sites within one of the Venice lagoon navigable canals close to the industrial area. Moreover, we investigated the impacts of dredged sediments on clam’s microbial communities. Results Concentrations of the trace elements and organic chemicals showed increasing concentrations from the city of Venice to sites close to the industrial area of Porto Marghera, where PCDD/Fs and PCBs concentrations were up to 120 times higher than the southern lagoon. While bioaccumulation of organic contaminants of industrial origin reflected sediments’ chemical concentrations, metal bioaccumulation was not consistent with metal concentrations measured in sediments probably due to the activation of ABC transporters. At the transcriptional level, we found a persistent activation of the mTORC1 signalling pathway, which is central in the coordination of cellular responses to chemical stress. Microbiota characterization showed the over-representation of potential opportunistic pathogens following exposure to the most contaminated sediments, leading to host immune response activation. Despite the limited acquisition of new microbial species from sediments, the latter play an important role in shaping Manila clam microbial communities. Conclusions Sediment management in the Venice lagoon will increase in the next years to maintain and create new canals as well as to allow the operation of the new mobile gates at the three Venice lagoon inlets. Our data reveal important transcriptional and microbial changes of Manila clams after exposure to sediments, therefore reuse of dredged sediments represents a potential risk for the conservation of this species and possibly for other organisms inhabiting the Venice lagoon.

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Section: Discussionmentioning

confidence: 99%

“…Over-representation of Arcobacter has already been described in wild clams inhabiting Porto Marghera [ 84 ], as well as in bivalves after exposure to stressful environmental conditions [ 81 , 82 , 85 – 87 ]. Arcobacter spp.…”

Section: Discussionmentioning

confidence: 99%