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Microorganisms
Volume 11
Issue 4
10.3390/microorganisms11040882
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Article

Effects of Dispersant on the Petroleum Hydrocarbon Biodegradation and Microbial Communities in Seawater from the Baltic Sea and Norwegian Sea

by
Ossi Tonteri
1,*,
Anna Reunamo
1,
Aura Nousiainen
1,
Laura Koskinen
2,
Jari Nuutinen
2,
Jaak Truu
3 and
Kirsten S. Jørgensen
1
1
Marine Research Centre, Finnish Environmental Institute, Latokartanonkaari 11, FI-00790 Helsinki, Finland
2
Laboratory Centre, Finnish Environmental Institute, Latokartanonkaari 11, FI-00790 Helsinki, Finland
3
Institute of Molecular and Cell Biology, Faculty of Science and Technology, University of Tartu, Riia 23, 51010 Tartu, Estonia
*
Author to whom correspondence should be addressed.
Microorganisms 2023, 11(4), 882; https://doi.org/10.3390/microorganisms11040882
Submission received: 31 January 2023 / Revised: 20 March 2023 / Accepted: 22 March 2023 / Published: 29 March 2023
(This article belongs to the Special Issue Oil Biodegradation and Bioremediation in Cold Marine Environment 2.0)
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Abstract

Dispersants have been used in several oil spill accidents, but little information is available on their effectiveness in Baltic Sea conditions with low salinity and cold seawater. This study investigated the effects of dispersant use on petroleum hydrocarbon biodegradation rates and bacterial community structures. Microcosm experiments were conducted at 5 °C for 12 days with North Sea crude oil and dispersant Finasol 51 with open sea Gulf of Bothnia and coastal Gulf of Finland and Norwegian Sea seawater. Petroleum hydrocarbon concentrations were analysed with GC-FID. Bacterial community structures were studied using 16S rDNA gene amplicon sequencing, and the abundance of genes involved in hydrocarbon degradation with quantitative PCR. The highest oil degradation gene abundances and oil removal were observed in microcosms with coastal seawater from the Gulf of Bothnia and Gulf of Finland, respectively, and the lowest in the seawater from the Norwegian Sea. Dispersant usage caused apparent effects on bacterial communities in all treatments; however, the dispersant’s effect on the biodegradation rate was unclear due to uncertainties with chemical analysis and variation in oil concentrations used in the experiments.
Keywords: oil biodegradation; dispersant; Baltic Sea; Norwegian Sea; oil spill; bacterial community oil biodegradation; dispersant; Baltic Sea; Norwegian Sea; oil spill; bacterial community

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MDPI and ACS Style

Tonteri, O.; Reunamo, A.; Nousiainen, A.; Koskinen, L.; Nuutinen, J.; Truu, J.; Jørgensen, K.S. Effects of Dispersant on the Petroleum Hydrocarbon Biodegradation and Microbial Communities in Seawater from the Baltic Sea and Norwegian Sea. Microorganisms 2023, 11, 882. https://doi.org/10.3390/microorganisms11040882

AMA Style

Tonteri O, Reunamo A, Nousiainen A, Koskinen L, Nuutinen J, Truu J, Jørgensen KS. Effects of Dispersant on the Petroleum Hydrocarbon Biodegradation and Microbial Communities in Seawater from the Baltic Sea and Norwegian Sea. Microorganisms. 2023; 11(4):882. https://doi.org/10.3390/microorganisms11040882

Chicago/Turabian Style

Tonteri, Ossi, Anna Reunamo, Aura Nousiainen, Laura Koskinen, Jari Nuutinen, Jaak Truu, and Kirsten S. Jørgensen. 2023. "Effects of Dispersant on the Petroleum Hydrocarbon Biodegradation and Microbial Communities in Seawater from the Baltic Sea and Norwegian Sea" Microorganisms 11, no. 4: 882. https://doi.org/10.3390/microorganisms11040882

APA Style

Tonteri, O., Reunamo, A., Nousiainen, A., Koskinen, L., Nuutinen, J., Truu, J., & Jørgensen, K. S. (2023). Effects of Dispersant on the Petroleum Hydrocarbon Biodegradation and Microbial Communities in Seawater from the Baltic Sea and Norwegian Sea. Microorganisms, 11(4), 882. https://doi.org/10.3390/microorganisms11040882

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