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Comparison of Hydrocarbon-Degrading Consortia from Surface and Deep Waters of the Eastern Mediterranean Sea: Characterization and Degradation Potential

Author

Listed:
  • Georgia Charalampous

    (School of Environmental Engineering, Technical University of Crete, 73100 Chania, Greece
    These authors have contributed equally to the work.)

  • Efsevia Fragkou

    (School of Environmental Engineering, Technical University of Crete, 73100 Chania, Greece
    These authors have contributed equally to the work.)

  • Konstantinos A. Kormas

    (Department of Ichthyology and Aquatic Environment, University of Thessaly, 38446 Volos, Greece)

  • Alexandre B. De Menezes

    (Ryan Institute, School of Natural Sciences, National University of Ireland Galway, Galway, Ireland)

  • Paraskevi N. Polymenakou

    (Institute of Marine Biology, Biotechnology and Aquaculture, Hellenic Centre for Marine Research, 71500 Heraklion, Crete, Greece)

  • Nikos Pasadakis

    (School of Mineral Resources Engineering, Technical University of Crete, 73100 Chania, Crete, Greece
    Institute of Petroleum Research, Foundation for Research and Technology Hellas, 73100 Chania, Greece)

  • Nicolas Kalogerakis

    (School of Environmental Engineering, Technical University of Crete, 73100 Chania, Greece
    Institute of Petroleum Research, Foundation for Research and Technology Hellas, 73100 Chania, Greece)

  • Eleftheria Antoniou

    (School of Environmental Engineering, Technical University of Crete, 73100 Chania, Greece)

  • Evangelia Gontikaki

    (School of Environmental Engineering, Technical University of Crete, 73100 Chania, Greece)

Abstract

The diversity and degradation capacity of hydrocarbon-degrading consortia from surface and deep waters of the Eastern Mediterranean Sea were studied in time-series experiments. Microcosms were set up in ONR7a medium at in situ temperatures of 25 °C and 14 °C for the Surface and Deep consortia, respectively, and crude oil as the sole source of carbon. The Deep consortium was additionally investigated at 25 °C to allow the direct comparison of the degradation rates to the Surface consortium. In total, ~50% of the alkanes and ~15% of the polycyclic aromatic hydrocarbons were degraded in all treatments by Day 24. Approximately ~95% of the total biodegradation by the Deep consortium took place within 6 days regardless of temperature, whereas comparable levels of degradation were reached on Day 12 by the Surface consortium. Both consortia were dominated by well-known hydrocarbon-degrading taxa. Temperature played a significant role in shaping the Deep consortia communities with Pseudomonas and Pseudoalteromonas dominating at 25 °C and Alcanivorax at 14 °C. Overall, the Deep consortium showed a higher efficiency for hydrocarbon degradation within the first week following contamination, which is critical in the case of oil spills, and thus merits further investigation for its exploitation in bioremediation technologies tailored to the Eastern Mediterranean Sea.

Suggested Citation

  • Georgia Charalampous & Efsevia Fragkou & Konstantinos A. Kormas & Alexandre B. De Menezes & Paraskevi N. Polymenakou & Nikos Pasadakis & Nicolas Kalogerakis & Eleftheria Antoniou & Evangelia Gontikaki, 2021. "Comparison of Hydrocarbon-Degrading Consortia from Surface and Deep Waters of the Eastern Mediterranean Sea: Characterization and Degradation Potential," Energies, MDPI, vol. 14(8), pages 1-18, April.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:8:p:2246-:d:537825
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    References listed on IDEAS

    as
    1. Muehlenbachs, Lucija & Cohen, Mark A. & Gerarden, Todd, 2013. "The impact of water depth on safety and environmental performance in offshore oil and gas production," Energy Policy, Elsevier, vol. 55(C), pages 699-705.
    2. Paul J McMurdie & Susan Holmes, 2014. "Waste Not, Want Not: Why Rarefying Microbiome Data Is Inadmissible," PLOS Computational Biology, Public Library of Science, vol. 10(4), pages 1-12, April.
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    Cited by:

    1. Eleftheria Antoniou & Efsevia Fragkou & Georgia Charalampous & Dimitris Marinakis & Nicolas Kalogerakis & Evangelia Gontikaki, 2022. "Emulating Deep-Sea Bioremediation: Oil Plume Degradation by Undisturbed Deep-Sea Microbial Communities Using a High-Pressure Sampling and Experimentation System," Energies, MDPI, vol. 15(13), pages 1-16, June.

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