Please use this identifier to cite or link to this item:
http://hdl.handle.net/10773/27403
Title: | The influence of salinity on the effects of Multi-walled carbon nanotubes on polychaetes |
Author: | De Marchi, Lucia Neto, Victor Pretti, Carlo Figueira, Etelvina Chiellini, Federica Morelli, Andrea Soares, Amadeu M. V. M. Freitas, Rosa |
Issue Date: | 2018 |
Publisher: | Nature Research |
Abstract: | Salinity shifts in estuarine and coastal areas are becoming a topic of concern and are one of the main factors influencing nanoparticles behaviour in the environment. For this reason, the impacts of multiwalled carbon nanotubes (MWCNTs) under different seawater salinity conditions were evaluated on the common ragworm Hediste diversicolor, a polychaete species widely used as bioindicator of estuarine environmental quality. An innovative method to assess the presence of MWCNT aggregates in the sediments was used for the first time. Biomarkers approach was used to evaluate the metabolic capacity, oxidative status and neurotoxicity of polychaetes after long-term exposure. The results revealed an alteration of energy-related responses in contaminated polychaetes under both salinity conditions, resulting in an increase of metabolism and expenditure of their energy reserves (lower glycogen and protein contents). Moreover, a concentration-dependent toxicity (higher lipid peroxidation, lower ratio between reduced and oxidized glutathione and activation of antioxidant defences and biotransformation mechanisms) was observed in H. diversicolor, especially when exposed to low salinity. Additionally, neurotoxicity was observed by inhibition of Cholinesterases activity in organisms exposed to MWCNTs at both salinities. |
Peer review: | yes |
URI: | http://hdl.handle.net/10773/27403 |
DOI: | |
Appears in Collections: | TEMA - Artigos CESAM - Artigos DBio - Artigos DEM - Artigos |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
Marchi_et_al-2018-Scientific_Reports.pdf | 1.8 MB | Adobe PDF | View/Open |
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.