Metal body burden and tissue oxidative status in the bivalve Venerupis decussata from Tunisian coastal lagoons

Safa Bejaoui, Carmen Michán, Khaoula Telahigue, Salwa Nechi, Mhamed el Cafsi, Nejla Soudani, Julián Blasco, Pedro M. Costa, José Alhama

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

Coastal transitional waters are exposed to many anthropogenic threats. This study aims to assess the trace metals' pollution status of transitional waters by evaluating its biological effects in the clam Venerupis decussata. Among the studied sites along the Tunisian littoral, South Tunis and Boughrara were the most impacted, since clams from these two lagoons presented significant differences in: (i) trace metal contents, (ii) in-cell hydrogen peroxide, (iii) enzymatic and non-enzymatic defenses, (iv) damage to lipids and proteins, and (v) protein post-translational modifications. These changes related to evident histopathological traits. PCA showed a clear separation between the digestive gland and gills tissues and illustrated an impact gradient in Tunisian coastal lagoons. Water temperature was revealed as an added natural stressor that, when concurring with high pollution, may jeopardize an ecosystem's health and contribute to the accumulation of hazardous metals in organisms.

Original languageEnglish
Article number105000
JournalMarine Environmental Research
Volume159
DOIs
Publication statusPublished - Jul 2020

Keywords

  • Clams
  • Histopathology
  • Molecular biomarkers
  • Oxidative stress
  • Temperature
  • Trace metals
  • Transitional waters

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