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Restructuring of a meiobenthic assemblage after sediment contamination with an antibacterial compound: case study of ciprofloxacin
Nasri, A.; Allouche, M.; Hannachi, A.; Harrath, A.H.; Aldahmash, W.; Alwasel, S.; Mahmoudi, E.; Beyrem, H.; Boufahja, F. (2020). Restructuring of a meiobenthic assemblage after sediment contamination with an antibacterial compound: case study of ciprofloxacin. Ecotoxicol. Environ. Saf. 205: 111084. https://dx.doi.org/10.1016/j.ecoenv.2020.111084
In: Ecotoxicology and Environmental Safety. Academic Press/Elsevier: Amsterdam, Netherlands etc. ISSN 0147-6513; e-ISSN 1090-2414
Peer reviewed article  
Beschikbaar in  Auteurs 
Trefwoord
    Marien/Kust
Author keywords
    Meiobenthic taxa; Nematode genera; Ciprofloxacin; Sediment contamination; Functional traits; Population evolution
Auteurs  Top 
  • Nasri, A.
  • Allouche, M.
  • Hannachi, A.
  • Harrath, A.H.
  • Aldahmash, W.
  • Alwasel, S.
  • Mahmoudi, E.
  • Beyrem, H.
  • Boufahja, F.
Abstract
    A microcosm experiment was conducted to evaluate the impacts of the fluoroquinolone antibiotic ciprofloxacin on meiobenthic taxa abundance, nematode genus structure, and functional trait parameters. Sediment samples were experimentally enriched with four different doses of ciprofloxacin [D1 (50 ppm Dry weight ‘DW’), D2 (100 ppm DW), D3 (200 ppm DW), and D4 (500 ppm DW)] and were then compared with non-enriched sediments (controls). After one month of exposure, the data showed that ciprofloxacin had altered the meiofaunal taxa abundance. A change in the structure of nematofaunal genera was observed, particularly with the highest dose (D4), which was characterized by the lowest taxonomic diversity. The SIMPER analysis revealed that the average dissimilarity between nematode communities increased with increasing doses of ciprofloxacin. Two dimensional (2D) non-metric multidimensional scaling (nMDS) plots and relative abundances of functional groups of nematode genus assemblages revealed that all functional trait abundances were affected, particularly with the highest dose. However, only the amphid shape and feeding group functions showed a clear distribution separation between the control and ciprofloxacin treatments. The nMDS second-stage ordination of inter-matrix rank correlations for matrices including genus and functional traits showed that the tail shape was the closest functional trait to the generic distribution. Thus, only the curves of cumulative dominance related to the tail shape mirrored discernibly the sedimentary concentrations in ciprofloxacin.
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