PLFA analyses of microbial communities associated with PAH-contaminated riverbank sediment.

Microbial Ecology
Brenda PrattCarl G Johnston

Abstract

Sediment contaminated with polycyclic aromatic hydrocarbons (PAHs) is widely distributed in aquatic ecosystems. The microbial community structure of riverbank PAH-contaminated sediments was investigated using phospholipid-derived fatty acid (PLFA) analysis. Surface and subsurface riverbank sediment was collected from a highly contaminated site and from an uncontaminated site along the Mahoning River, OH. PAH concentrations, physical sediment characteristics, and other microbial community parameters (biomass as phospholipid phosphate (PLP) and activity) were also measured. PAHs were detected in all samples but were only quantifiable in the contaminated (250 μg/g g(-1)) subsurface sediment. Subsurface samples from both locations showed very similar PLP values and distribution of PLFAs, with 27-37 % of the microbial community structure being composed of sulfate reducing and other anaerobic bacteria. Principal components analysis indicated no correlation between PAH contamination and PLFA diversity. Although PLP and phospholipid fatty acid measurements of bacterial communities did not reflect the environmental differences among sites, the highly PAH-contaminated sediment showed the highest measured microbial activity (reduction of ...Continue Reading

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Citations

Oct 20, 2015·The Science of the Total Environment·Annamaria ZoppiniLuisa Patrolecco
Apr 14, 2016·Environmental Science and Pollution Research International·Lingwen WangLizhong Zhu
May 3, 2015·Environmental Science and Pollution Research International·Assia KaciThierry Berthe
Jun 25, 2016·International Journal of Environmental Research and Public Health·Wei Huang, Xia Jiang
Oct 1, 2016·Environmental Science and Pollution Research International·Lili PanLizhong Zhu
Aug 24, 2017·Journal of Basic Microbiology·Jing LiXianzhu Dai

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