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Bacterial Community Legacy Effects Following the Agia Zoni II Oil-Spill, Greece

Thomas, Gareth E and Cameron, Tom C and Campo, Pablo and Clark, Dave R and Coulon, Frederic and Gregson, Benjamin H and Hepburn, Leanne J and McGenity, Terry J and Miliou, Anastasia and Whitby, Corinne and McKew, Boyd A (2020) 'Bacterial Community Legacy Effects Following the Agia Zoni II Oil-Spill, Greece.' Frontiers in Microbiology, 11. ISSN 1664-302X

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In September 2017 the Agia Zoni II sank in the Saronic Gulf, Greece, releasing approximately 500 tonnes of heavy fuel oil, contaminating the Salamina and Athens coastlines. Effects of the spill, and remediation efforts, on sediment microbial communities were quantified over the following 7 months. Five days post-spill, the concentration of measured hydrocarbons within surface sediments of contaminated beaches was 1,093–3,773 μg g–1 dry sediment (91% alkanes and 9% polycyclic aromatic hydrocarbons), but measured hydrocarbons decreased rapidly after extensive clean-up operations. Bacterial genera known to contain oil-degrading species increased in abundance, including Alcanivorax, Cycloclasticus, Oleibacter, Oleiphilus, and Thalassolituus, and the species Marinobacter hydrocarbonoclasticus from approximately 0.02 to >32% (collectively) of the total bacterial community. Abundance of genera with known hydrocarbon-degraders then decreased 1 month after clean-up. However, a legacy effect was observed within the bacterial community, whereby Alcanivorax and Cycloclasticus persisted for several months after the oil spill in formerly contaminated sites. This study is the first to evaluate the effect of the Agia Zoni II oil-spill on microbial communities in an oligotrophic sea, where in situ oil-spill studies are rare. The results aid the advancement of post-spill monitoring models, which can predict the capability of environments to naturally attenuate oil.

Item Type: Article
Uncontrolled Keywords: Mediterranean, hydrocarbons, Agia Zoni II, oil spill, Alcanivorax, Cycloclasticus, Idiomarina, Greece
Divisions: Faculty of Science and Health > Life Sciences, School of
Depositing User: Elements
Date Deposited: 20 Jul 2020 12:46
Last Modified: 20 Jul 2020 12:46

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