Response of sediment bacterial community to triclosan in subtropical freshwater benthic microcosms

Feng Jiao Peng*, Noël J. Diepens, Chang Gui Pan, Guang Guo Ying, Daniel Salvito, Henriette Selck, Paul J. Van den Brink

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

1 Citation (Scopus)

Abstract

The response of sediment bacterial communities in subtropical freshwater benthic microcosms to sediment-associated triclosan (TCS; 28 d exposure) was analysed using Illumina high-throughput sequencing. This study highlights the interactive effects of TCS and the presence of benthic macroinvertebrates (Limnodrilus hoffmeisteri and Viviparidae bellamya) on sediment bacterial communities. Our results show that TCS alone significantly altered the taxonomic composition and decreased alpha diversity of sediment bacterial communities at concentrations ≥80 μg TCS/g dry weight (dw) sediment (sed). Regarding dominant phyla, TCS significantly reduced the relative abundance of Bacteroidetes and Firmicutes at these concentrations, whereas the relative abundance of Chloroflexi and Cyanobacteria increased. In the presence of benthic macroinvertebrates, the sediment bacterial community was affected by 8 μg TCS/g dw sed as well. However, the presence of benthic macroinvertebrates did not cause measurable changes to bacterial community in unspiked (i.e., control) sediment. These results indicate that TCS alone would not alter the sediment bacterial community at environmentally relevant concentrations (up till 8 μg/g dw sed), but may have an effect in combination with the presence of benthic macroinvertebrates. Therefore, we recommend to include benthic macroinvertebrates when assessing the response of sediment bacterial communities during exposure to environmental stress such as organic contaminants.

Original languageEnglish
Pages (from-to)676-683
Number of pages8
JournalEnvironmental Pollution
Volume248
DOIs
Publication statusPublished - 1 May 2019

Fingerprint

Triclosan
Fresh Water
Sediments
Weights and Measures
Chloroflexi
Bacteroidetes
Environmental Exposure
Cyanobacteria

Keywords

  • Benthic macroinvertebrates
  • Microcosm
  • Sediment bacterial community
  • Toxicity
  • Triclosan

Cite this

Peng, Feng Jiao ; Diepens, Noël J. ; Pan, Chang Gui ; Ying, Guang Guo ; Salvito, Daniel ; Selck, Henriette ; Van den Brink, Paul J. / Response of sediment bacterial community to triclosan in subtropical freshwater benthic microcosms. In: Environmental Pollution. 2019 ; Vol. 248. pp. 676-683.
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abstract = "The response of sediment bacterial communities in subtropical freshwater benthic microcosms to sediment-associated triclosan (TCS; 28 d exposure) was analysed using Illumina high-throughput sequencing. This study highlights the interactive effects of TCS and the presence of benthic macroinvertebrates (Limnodrilus hoffmeisteri and Viviparidae bellamya) on sediment bacterial communities. Our results show that TCS alone significantly altered the taxonomic composition and decreased alpha diversity of sediment bacterial communities at concentrations ≥80 μg TCS/g dry weight (dw) sediment (sed). Regarding dominant phyla, TCS significantly reduced the relative abundance of Bacteroidetes and Firmicutes at these concentrations, whereas the relative abundance of Chloroflexi and Cyanobacteria increased. In the presence of benthic macroinvertebrates, the sediment bacterial community was affected by 8 μg TCS/g dw sed as well. However, the presence of benthic macroinvertebrates did not cause measurable changes to bacterial community in unspiked (i.e., control) sediment. These results indicate that TCS alone would not alter the sediment bacterial community at environmentally relevant concentrations (up till 8 μg/g dw sed), but may have an effect in combination with the presence of benthic macroinvertebrates. Therefore, we recommend to include benthic macroinvertebrates when assessing the response of sediment bacterial communities during exposure to environmental stress such as organic contaminants.",
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Response of sediment bacterial community to triclosan in subtropical freshwater benthic microcosms. / Peng, Feng Jiao; Diepens, Noël J.; Pan, Chang Gui; Ying, Guang Guo; Salvito, Daniel; Selck, Henriette; Van den Brink, Paul J.

In: Environmental Pollution, Vol. 248, 01.05.2019, p. 676-683.

Research output: Contribution to journalArticleAcademicpeer-review

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AU - Peng, Feng Jiao

AU - Diepens, Noël J.

AU - Pan, Chang Gui

AU - Ying, Guang Guo

AU - Salvito, Daniel

AU - Selck, Henriette

AU - Van den Brink, Paul J.

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AB - The response of sediment bacterial communities in subtropical freshwater benthic microcosms to sediment-associated triclosan (TCS; 28 d exposure) was analysed using Illumina high-throughput sequencing. This study highlights the interactive effects of TCS and the presence of benthic macroinvertebrates (Limnodrilus hoffmeisteri and Viviparidae bellamya) on sediment bacterial communities. Our results show that TCS alone significantly altered the taxonomic composition and decreased alpha diversity of sediment bacterial communities at concentrations ≥80 μg TCS/g dry weight (dw) sediment (sed). Regarding dominant phyla, TCS significantly reduced the relative abundance of Bacteroidetes and Firmicutes at these concentrations, whereas the relative abundance of Chloroflexi and Cyanobacteria increased. In the presence of benthic macroinvertebrates, the sediment bacterial community was affected by 8 μg TCS/g dw sed as well. However, the presence of benthic macroinvertebrates did not cause measurable changes to bacterial community in unspiked (i.e., control) sediment. These results indicate that TCS alone would not alter the sediment bacterial community at environmentally relevant concentrations (up till 8 μg/g dw sed), but may have an effect in combination with the presence of benthic macroinvertebrates. Therefore, we recommend to include benthic macroinvertebrates when assessing the response of sediment bacterial communities during exposure to environmental stress such as organic contaminants.

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