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Changes of benthic bacteria and meiofauna assemblages during bio-treatments of anthracene-contaminated sediments from Bizerta lagoon (Tunisia)
- Source :
- Environmental Science and Pollution Research, Environmental Science and Pollution Research, 2015, 22 (20), p. 15319-15331. ⟨10.1007/s11356-015-4105-7⟩, Environmental Science and Pollution Research, Springer Verlag, 2015, 22 (20), p. 15319-15331. ⟨10.1007/s11356-015-4105-7⟩
- Publication Year :
- 2014
-
Abstract
- cited By 4; International audience; 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.
- Subjects :
- Bioaugmentation
Geologic Sediments
Microcosms
Tunisia
Nematoda
Meiofauna
Health, Toxicology and Mutagenesis
Meiobenthos
010501 environmental sciences
01 natural sciences
Biostimulation
Degradation
03 medical and health sciences
Bioremediation
Canonical correspondence analysis
RNA, Ribosomal, 16S
Environmental Chemistry
Animals
Ecosystem
030304 developmental biology
0105 earth and related environmental sciences
[SDV.EE]Life Sciences [q-bio]/Ecology, environment
Anthracenes
0303 health sciences
Bacteria
Ecology
Community structure
General Medicine
PAH degraders
Pollution
RNA, Bacterial
Biodegradation, Environmental
Benthic zone
Anthracene
Bacteria diversity
Environmental science
Bizerta lagoon
Microcosm
Water Pollutants, Chemical
Subjects
Details
- ISSN :
- 16147499 and 09441344
- Volume :
- 22
- Issue :
- 20
- Database :
- OpenAIRE
- Journal :
- Environmental science and pollution research international
- Accession number :
- edsair.doi.dedup.....ff765f0e18b2b9b7d05c8cce1eb7efca