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Metatranscriptomic responses and microbial degradation of background polycyclic aromatic hydrocarbons in the coastal Mediterranean and Antarctica
CSIC, Spain.
CSIC, Spain.
CSIC, Spain.
Linnaeus University, Faculty of Health and Life Sciences, Department of Biology and Environmental Science. (Ctr Ecol & Evolut Microbial Model Syst EEMiS)ORCID iD: 0000-0002-8779-6464
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2023 (English)In: Environmental Science and Pollution Research, ISSN 0944-1344, E-ISSN 1614-7499, Vol. 30, no 57, p. 119988-119999Article in journal (Refereed) Published
Abstract [en]

Although microbial degradation is a key sink of polycyclic aromatic hydrocarbons (PAH) in surface seawaters, there is a dearth of field-based evidences of regional divergences in biodegradation and the effects of PAHs on site-specific microbial communities. We compared the magnitude of PAH degradation and its impacts in short-term incubations of coastal Mediterranean and the Maritime Antarctica microbiomes with environmentally relevant concentrations of PAHs. Mediterranean bacteria readily degraded the less hydrophobic PAHs, with rates averaging 4.72 +/- 0.5 ng L h-1. Metatranscriptomic responses showed significant enrichments of genes associated to horizontal gene transfer, stress response, and PAH degradation, mainly harbored by Alphaproteobacteria. Community composition changed and increased relative abundances of Bacteroidota and Flavobacteriales. In Antarctic waters, there was no degradation of PAH, and minimal metatranscriptome responses were observed. These results provide evidence for factors such as geographic region, community composition, and pre-exposure history to predict PAH biodegradation in seawater.

Place, publisher, year, edition, pages
Springer, 2023. Vol. 30, no 57, p. 119988-119999
Keywords [en]
Polycyclic aromatic hydrocarbons (PAH), Metatranscriptomics, 16S amplicon sequencing, PAH biodegradation rates, Antarctica, Mediterranean
National Category
Microbiology Environmental Sciences
Research subject
Ecology, Microbiology; Natural Science, Environmental Science
Identifiers
URN: urn:nbn:se:lnu:diva-125935DOI: 10.1007/s11356-023-30650-1ISI: 001100586300004PubMedID: 37934408Scopus ID: 2-s2.0-85178995648OAI: oai:DiVA.org:lnu-125935DiVA, id: diva2:1818212
Available from: 2023-12-08 Created: 2023-12-08 Last updated: 2024-01-18Bibliographically approved

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