Journal
ENVIRONMENTAL POLLUTION
Volume 202, Issue -, Pages 205-214Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.envpol.2015.03.023
Keywords
Ocean acidification; Biomarkers; Oxidative stress; Bivalves; Pharmaceutical drugs
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Funding
- European Funds through COMPETE
- National Funds through the Portuguese Science Foundation (FCT) [PEst-C/MAR/LA0017/2013]
- Portuguese Fundacao para a Ciencia e Tecnologia (FCT) [SFRH/BPD/92258/2013, SFRH/BPD/78645/2011]
- FCT [SFRH/BD/86356/2012, SFRH/BD/93107/2013]
- Fundação para a Ciência e a Tecnologia [SFRH/BPD/92258/2013, SFRH/BD/93107/2013] Funding Source: FCT
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In the present study, the bivalve Scrobicularia piano, collected from two contrasting areas (pristine location and mercury contaminated area), was selected to assess the biochemical alterations imposed by pH decrease, carbamazepine (an antiepileptic) and the combined effect of both stressors. The effects on oxidative stress related biomarkers after 96 h exposure revealed that pH decrease and carbamazepine induced alterations on clams, with greater impacts on individuals from the contaminated area which presented higher mortality, higher lipid peroxidation and higher glutathione S-transferase activity. These results emphasize the risk of extrapolating results from one area to another, since the same species inhabiting different areas may be affected differently when exposed to the same stressors. Furthermore, the results obtained showed that, when combined, the impact of pH decrease and carbamazepine was lower than each stressor acting alone, which could be related to the defence mechanism of valves closure when bivalves are under higher stressful conditions. (C) 2015 Elsevier Ltd. All rights reserved.
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