Journal
CHEMOSPHERE
Volume 168, Issue -, Pages 1194-1202Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chemosphere.2016.10.079
Keywords
Ecotoxicological assessment; Indicator; Invertebrate; Toxicity; Genomics; Next generation sequencing; Antimicrobial
Categories
Funding
- Environmental Protection Public Welfare Scientific Research Project of China [201409040]
- Fundamental Research Funds for the Central Universities
- Collaborative Innovation Center for Regional Environmental Quality
- Canada Research Chair program
- High Level Foreign Experts program - State Administration of Foreign Experts Affairs, the P.R. China [GDT20143200016]
- Einstein Professor Program of the Chinese Academy of Sciences
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Responses of the earthworm (Eisenia fetida) and compositions of associated microbial communities were determined after exposure to various concentrations of Triclosan (TCS) for 7 d. Concentrations of TCS were greater in intestines than in epidermis of earthworms, which suggested that earthworms accumulate TCS mainly by ingestion rather than by epidermic penetration. Exposure to TCS caused a concentration-dependent increase in activities of antioxidant enzymes, including superoxide dismutase (SOD), catalase (CAT), and peroxidase (POD) and in malondialdehyde (MDA) in E. fetida. Analyses of both the bacterial and eukaryotic community by next generation sequencing (NGS), demonstrated that TCS caused a concentration-dependent decrease in sensitive genera. While relative abundances of Pseudomonas, Stenotrophomonas, and Achromobacter were increased. Nine susceptible microbial groups were more sensitive to exposure to TCS, than were activities of enzymes in earthworms. Thus, rapid genomic measures of gut flora can be used as indicators to assess adverse effects of chemicals on earthworms. (C) 2016 Elsevier Ltd. All rights reserved.
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