Changes of benthic bacteria and meiofauna assemblages during bio-treatments of anthracene-contaminated sediments from Bizerta lagoon (Tunisia)

Olfa Ben Said, Hela Louati, Amel Soltani, Hugues Preud’homme, Cristiana Cravo-Laureau, Patrice Got, Olivier Pringault, Patricia Aissa, Robert Duran

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Sediments from Bizerta lagoon were used in an experimental microcosm setup involving three scenarios for the bioremediation of anthracene-polluted sediments, namely bioaugmentation, biostimulation, and a combination of both bioaugmentation and biostimulation. In order to investigate the effect of the biotreatments on the benthic biosphere, 16S rRNA gene-based T-RFLP bacterial community structure and the abundance and diversity of the meiofauna were determined throughout the experiment period. Addition of fresh anthracene drastically reduced the benthic bacterial and meiofaunal abundances. The treatment combining biostimulation and bioaugmentation was most efficient in eliminating anthracene, resulting in a less toxic sedimentary environment, which restored meiofaunal abundance and diversity. Furthermore, canonical correspondence analysis showed that the biostimulation treatment promoted a bacterial community favorable to the development of nematodes while the treatment combining biostimulation and bioaugmentation resulted in a bacterial community that advantaged the development of the other meiofauna taxa (copepods, oligochaetes, polychaetes, and other) restoring thus the meiofaunal structure. The results highlight the importance to take into account the bacteria/meiofauna interactions during the implementation of bioremediation treatment.

Original languageEnglish
Pages (from-to)15319-15331
Number of pages13
JournalEnvironmental Science and Pollution Research
Volume22
Issue number20
DOIs
Publication statusPublished - 25 Jan 2015
Externally publishedYes

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Keywords

  • Anthracene
  • Bacteria diversity
  • Bioremediation
  • Bizerta lagoon
  • Community structure
  • Degradation
  • Meiofauna
  • Microcosms
  • PAH degraders

ASJC Scopus subject areas

  • Environmental Chemistry
  • Health, Toxicology and Mutagenesis
  • Pollution

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