1
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Vogel AL, Thompson KJ, Straub D, Musat F, Gutierrez T, Kleindienst S. Genetic redundancy in the naphthalene-degradation pathway of Cycloclasticus pugetii strain PS-1 enables response to varying substrate concentrations. FEMS Microbiol Ecol 2024; 100:fiae060. [PMID: 38614960 DOI: 10.1093/femsec/fiae060] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2023] [Revised: 03/22/2024] [Accepted: 04/12/2024] [Indexed: 04/15/2024] Open
Abstract
Polycyclic aromatic hydrocarbon (PAH) contamination in marine environments range from low-diffusive inputs to high loads. The influence of PAH concentration on the expression of functional genes [e.g. those encoding ring-hydroxylating dioxygenases (RHDs)] has been overlooked in PAH biodegradation studies. However, understanding marker-gene expression under different PAH loads can help to monitor and predict bioremediation efficiency. Here, we followed the expression (via RNA sequencing) of Cycloclasticus pugetii strain PS-1 in cell suspension experiments under different naphthalene (100 and 30 mg L-1) concentrations. We identified genes encoding previously uncharacterized RHD subunits, termed rhdPS1α and rhdPS1β, that were highly transcribed in response to naphthalene-degradation activity. Additionally, we identified six RHD subunit-encoding genes that responded to naphthalene exposure. By contrast, four RHD subunit genes were PAH-independently expressed and three other RHD subunit genes responded to naphthalene starvation. Cycloclasticus spp. could, therefore, use genetic redundancy in key PAH-degradation genes to react to varying PAH loads. This genetic redundancy may restrict the monitoring of environmental hydrocarbon-degradation activity using single-gene expression. For Cycloclasticus pugetii strain PS-1, however, the newly identified rhdPS1α and rhdPS1β genes might be potential target genes to monitor its environmental naphthalene-degradation activity.
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Affiliation(s)
- Anjela L Vogel
- Eberhard Karls University of Tübingen, Department of Geosciences, Schnarrenbergstr. 94-96, Tübingen 72076, Germany
- University of Stuttgart, Department of Environmental Microbiology, Institute for Sanitary Engineering, Water Quality and Solid Waste Management (ISWA), Am Bandtäle 2, Stuttgart 70569, Germany
| | - Katharine J Thompson
- Eberhard Karls University of Tübingen, Department of Geosciences, Schnarrenbergstr. 94-96, Tübingen 72076, Germany
- University of Stuttgart, Department of Environmental Microbiology, Institute for Sanitary Engineering, Water Quality and Solid Waste Management (ISWA), Am Bandtäle 2, Stuttgart 70569, Germany
| | - Daniel Straub
- Eberhard Karls University of Tübingen, Quantitative Biology Center (QBiC), Auf der Morgenstelle 10, Tübingen 72076, Germany
- Cluster of Excellence: EXC 2124: Controlling Microbes to Fight Infection, Auf der Morgenstelle 28, Tübingen 72076, Germany
| | - Florin Musat
- Aarhus University, Department of Biology, Section for Microbiology, Ny Munkegade 116, Aarhus C 8000, Denmark
- Babeş-Bolyai University, Department of Molecular Biology and Biotechnology, Faculty of Biology and Geology, Str. Republicii nr 44, Cluj-Napoca 400015, Romania
| | - Tony Gutierrez
- Heriot-Watt University, Institute of Mechanical Process and Energy Engineering (IMPEE), School of Engineering and Physical Sciences, Edinburgh EH14 4AS, UK
| | - Sara Kleindienst
- Eberhard Karls University of Tübingen, Department of Geosciences, Schnarrenbergstr. 94-96, Tübingen 72076, Germany
- University of Stuttgart, Department of Environmental Microbiology, Institute for Sanitary Engineering, Water Quality and Solid Waste Management (ISWA), Am Bandtäle 2, Stuttgart 70569, Germany
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2
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Summers S, Bin-Hudari MS, Magill C, Henry T, Gutierrez T. Identification of the bacterial community that degrades phenanthrene sorbed to polystyrene nanoplastics using DNA-based stable isotope probing. Sci Rep 2024; 14:5229. [PMID: 38433255 PMCID: PMC10909871 DOI: 10.1038/s41598-024-55825-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2023] [Accepted: 02/28/2024] [Indexed: 03/05/2024] Open
Abstract
In the Anthropocene, plastic pollution has become a new environmental biotope, the so-called plastisphere. In the oceans, nano- and micro-sized plastics are omnipresent and found in huge quantities throughout the water column and sediment, and their large surface area-to-volume ratio offers an excellent surface to which hydrophobic chemical pollutants (e.g. petrochemicals and POPs) can readily sorb to. Our understanding of the microbial communities that breakdown plastic-sorbed chemical pollutants, however, remains poor. Here, we investigated the formation of 500 nm and 1000 nm polystyrene (PS) agglomerations in natural seawater from a coastal environment, and we applied DNA-based stable isotope probing (DNA-SIP) with the 500 nm PS sorbed with isotopically-labelled phenanthrene to identify the bacterial members in the seawater community capable of degrading the hydrocarbon. Whilst we observed no significant impact of nanoplastic size on the microbial communities associated with agglomerates that formed in these experiments, these communities were, however, significantly different to those in the surrounding seawater. By DNA-SIP, we identified Arcobacteraceae, Brevundimonas, Comamonas, uncultured Comamonadaceae, Delftia, Sphingomonas and Staphylococcus, as well as the first member of the genera Acidiphilum and Pelomonas to degrade phenanthrene, and of the genera Aquabacterium, Paracoccus and Polymorphobacter to degrade a hydrocarbon. This work provides new information that feeds into our growing understanding on the fate of co-pollutants associated with nano- and microplastics in the ocean.
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Affiliation(s)
- Stephen Summers
- Institute of Mechanical, Process and Energy Engineering (IMPEE), School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh, EH14 4AS, UK
- Singapore Centre for Environmental Life Sciences Engineering, Life Sciences Institute, National University of Singapore, Singapore, 119077, Singapore
- St John's Island National Marine Laboratory, National University of Singapore, Singapore, 098634, Singapore
| | - Mohammad Sufian Bin-Hudari
- Department of Isotope Biogeochemistry, Helmholtz Centre for Environmental Research-UFZ, Permoserstraße 15, 04318, Leipzig, Germany
| | - Clayton Magill
- Institute for GeoEnergy Engineering, School of Energy, Geoscience, Infrastructure and Society, The Lyell Centre, Heriot-Watt University, Edinburgh, EH14 4AS, UK
| | - Theodore Henry
- School of Energy, Geoscience, Infrastructure and Society (EGIS), Heriot-Watt University, Edinburgh, EH14 4AS, UK
- Department of Forestry Wildlife and Fisheries, Centre for Environmental Biotechnology, The University of Tennessee, Knoxville, TN, 36849, USA
| | - Tony Gutierrez
- Institute of Mechanical, Process and Energy Engineering (IMPEE), School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh, EH14 4AS, UK.
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Gutierrez T, Coulon F, Ziervogel K. Editorial: Methods in aquatic microbiology. Front Microbiol 2023; 14:1338297. [PMID: 38111641 PMCID: PMC10726113 DOI: 10.3389/fmicb.2023.1338297] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2023] [Accepted: 11/21/2023] [Indexed: 12/20/2023] Open
Affiliation(s)
- Tony Gutierrez
- School of Engineering and Physical Sciences, Institute of Mechanical Process and Energy Engineering (IMPEE), Heriot-Watt University, Edinburgh, United Kingdom
| | - Frederic Coulon
- School of Water, Energy, and Environment, Cranfield University, Cranfield, United Kingdom
| | - Kai Ziervogel
- Institute for the Study of Earth, Oceans, and Space, University of New Hampshire, Durham, NC, United States
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Vázquez Rosas Landa M, De Anda V, Rohwer RR, Angelova A, Waldram G, Gutierrez T, Baker BJ. Exploring novel alkane-degradation pathways in uncultured bacteria from the North Atlantic Ocean. mSystems 2023; 8:e0061923. [PMID: 37702502 PMCID: PMC10654063 DOI: 10.1128/msystems.00619-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2023] [Accepted: 07/19/2023] [Indexed: 09/14/2023] Open
Abstract
IMPORTANCE Petroleum pollution in the ocean has increased because of rapid population growth and modernization, requiring urgent remediation. Our understanding of the metabolic response of native microbial communities to oil spills is not well understood. Here, we explored the baseline hydrocarbon-degrading communities of a subarctic Atlantic region to uncover the metabolic potential of the bacteria that inhabit the surface and subsurface water. We conducted enrichments with a 13C-labeled hydrocarbon to capture the fraction of the community actively using the hydrocarbon. We then combined this approach with metagenomics to identify the metabolic potential of this hydrocarbon-degrading community. This revealed previously undescribed uncultured bacteria with unique metabolic mechanisms involved in aerobic hydrocarbon degradation, indicating that temperature may be pivotal in structuring hydrocarbon-degrading baseline communities. Our findings highlight gaps in our understanding of the metabolic complexity of hydrocarbon degradation by native marine microbial communities.
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Affiliation(s)
- Mirna Vázquez Rosas Landa
- Department of Marine Science, Marine Science Institute, University of Texas at Austin, Port Aransas, Texas, USA
- Instituto de Ciencias del Mar y Limnologia Universidad Nacional Autónoma de Mexico, Unidad Académica de Ecologia y Biodiversidad Acuática, Mexico City, Mexico
| | - Valerie De Anda
- Department of Marine Science, Marine Science Institute, University of Texas at Austin, Port Aransas, Texas, USA
- Department of Integrative Biology, The University of Texas at Austin, Austin, Texas, USA
| | - Robin R. Rohwer
- Department of Integrative Biology, The University of Texas at Austin, Austin, Texas, USA
| | - Angelina Angelova
- School of Engineering and Physical Sciences, Institute of Mechanical, Process and Energy Engineering (IMPEE), Heriot-Watt University, Edinburgh, United Kingdom
| | - Georgia Waldram
- School of Engineering and Physical Sciences, Institute of Mechanical, Process and Energy Engineering (IMPEE), Heriot-Watt University, Edinburgh, United Kingdom
| | - Tony Gutierrez
- School of Engineering and Physical Sciences, Institute of Mechanical, Process and Energy Engineering (IMPEE), Heriot-Watt University, Edinburgh, United Kingdom
| | - Brett J. Baker
- Department of Marine Science, Marine Science Institute, University of Texas at Austin, Port Aransas, Texas, USA
- Department of Integrative Biology, The University of Texas at Austin, Austin, Texas, USA
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Gutierrez T, Liu H. Editorial: Rising stars in aquatic microbiology: 2022. Front Microbiol 2023; 14:1265720. [PMID: 37655346 PMCID: PMC10466036 DOI: 10.3389/fmicb.2023.1265720] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2023] [Accepted: 07/31/2023] [Indexed: 09/02/2023] Open
Affiliation(s)
- Tony Gutierrez
- Institute of Mechanical Process and Energy Engineering (IMPEE), School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh, United Kingdom
| | - Hongbin Liu
- Department of Ocean Science, Hong Kong University of Science and Technology, Kowloon, Hong Kong SAR, China
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6
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Vogel AL, Thompson KJ, Straub D, App CB, Gutierrez T, Löffler FE, Kleindienst S. Substrate-independent expression of key functional genes in Cycloclasticus pugetii strain PS-1 limits their use as markers for PAH biodegradation. Front Microbiol 2023; 14:1185619. [PMID: 37455737 PMCID: PMC10338962 DOI: 10.3389/fmicb.2023.1185619] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2023] [Accepted: 05/22/2023] [Indexed: 07/18/2023] Open
Abstract
Microbial degradation of petroleum hydrocarbons is a crucial process for the clean-up of oil-contaminated environments. Cycloclasticus spp. are well-known polycyclic aromatic hydrocarbon (PAH) degraders that possess PAH-degradation marker genes including rhd3α, rhd2α, and pahE. However, it remains unknown if the expression of these genes can serve as an indicator for active PAH degradation. Here, we determined transcript-to-gene (TtG) ratios with (reverse transcription) qPCR in cultures of Cycloclasticus pugetii strain PS-1 grown with naphthalene, phenanthrene, a mixture of these PAHs, or alternate substrates (i.e., no PAHs). Mean TtG ratios of 1.99 × 10-2, 1.80 × 10-3, and 3.20 × 10-3 for rhd3α, rhd2α, and pahE, respectively, were measured in the presence or absence of PAHs. The TtG values suggested that marker-gene expression is independent of PAH degradation. Measurement of TtG ratios in Arctic seawater microcosms amended with water-accommodated crude oil fractions, and incubated under in situ temperature conditions (i.e., 1.5°C), only detected Cycloclasticus spp. rhd2α genes and transcripts (mean TtG ratio of 4.15 × 10-1). The other marker genes-rhd3α and pahE-were not detected, suggesting that not all Cycloclasticus spp. carry these genes and a broader yet-to-be-identified repertoire of PAH-degradation genes exists. The results indicate that the expression of PAH marker genes may not correlate with PAH-degradation activity, and transcription data should be interpreted cautiously.
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Affiliation(s)
- Anjela L. Vogel
- Department of Geosciences, Eberhard Karls University of Tübingen, Tübingen, Germany
- Department of Environmental Microbiology, Institute for Sanitary Engineering, Water Quality and Solid Waste Management (ISWA), University of Stuttgart, Stuttgart, Germany
| | - Katharine J. Thompson
- Department of Geosciences, Eberhard Karls University of Tübingen, Tübingen, Germany
- Department of Environmental Microbiology, Institute for Sanitary Engineering, Water Quality and Solid Waste Management (ISWA), University of Stuttgart, Stuttgart, Germany
| | - Daniel Straub
- Quantitative Biology Center (QBiC), Eberhard Karls University of Tübingen, Tübingen, Germany
- Cluster of Excellence: EXC 2124: Controlling Microbes to Fight Infection, Tübingen, Germany
| | - Constantin B. App
- Department of Geosciences, Eberhard Karls University of Tübingen, Tübingen, Germany
| | - Tony Gutierrez
- School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh, United Kingdom
| | - Frank E. Löffler
- Center for Environmental Biotechnology, University of Tennessee, Knoxville, TN, United States
- Department of Microbiology, University of Tennessee, Knoxville, TN, United States
- Biosciences Division, Oak Ridge National Laboratory, Oak Ridge, TN, United States
- Department of Civil and Environmental Engineering, University of Tennessee, Knoxville, TN, United States
- Department of Biosystems Engineering and Soil Science, University of Tennessee, Knoxville, TN, United States
| | - Sara Kleindienst
- Department of Geosciences, Eberhard Karls University of Tübingen, Tübingen, Germany
- Department of Environmental Microbiology, Institute for Sanitary Engineering, Water Quality and Solid Waste Management (ISWA), University of Stuttgart, Stuttgart, Germany
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7
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Sanjuan E, Pancorbo O, Santana K, Miñarro O, Sala V, Muchada M, Boned S, Juega JM, Pagola J, García-Tornel Á, Requena M, Rodríguez-Villatoro N, Rodríguez-Luna D, Deck M, Ribo M, Molina CA, Meler P, Romero V, Dalmases G, Rodríguez-Samaniego MT, Calleja L, Gutierrez T, Peña L, Gallego JC, Lorenzo E, Gonzalez Y, Moreno R, Rubiera M. Management of acute stroke. Specific nursing care and treatments in the stroke unit. Neurologia 2023:S2173-5808(23)00022-6. [PMID: 37120108 DOI: 10.1016/j.nrleng.2020.07.026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2020] [Accepted: 07/29/2020] [Indexed: 05/01/2023] Open
Abstract
OBJECTIVE This study provides a series of updated, evidence-based recommendations for the management of acute stroke. We aim to lay a foundation for the development of individual centres' internal protocols, serving as a reference for nursing care. METHODS We review the available evidence on acute stroke care. The most recent national and international guidelines were consulted. Levels of evidence and degrees of recommendation are based on the Oxford Centre for Evidence-Based Medicine classification. RESULTS The study describes prehospital acute stroke care, the operation of the code stroke protocol, care provided by the stroke team upon the patient's arrival at hospital, reperfusion treatments and their limitations, admission to the stroke unit, nursing care in the stroke unit, and discharge from hospital. CONCLUSIONS These guidelines provide general, evidence-based recommendations to guide professionals who care for patients with acute stroke. However, limited data are available on some aspects, showing the need for continued research on acute stroke management.
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Affiliation(s)
- E Sanjuan
- Unidad de Ictus, Servicio de Neurología, Vall d'Hebron Hospital Universitari, Vall d'Hebron Barcelona Hospital Campus, Barcelona, Spain.
| | - O Pancorbo
- Unidad de Ictus, Servicio de Neurología, Vall d'Hebron Hospital Universitari, Vall d'Hebron Barcelona Hospital Campus, Barcelona, Spain; Departament de Medicina, Universitat Autònoma de Barcelona, Barcelona, Spain
| | - K Santana
- Unidad de Ictus, Servicio de Neurología, Vall d'Hebron Hospital Universitari, Vall d'Hebron Barcelona Hospital Campus, Barcelona, Spain
| | - O Miñarro
- Unidad de Ictus, Servicio de Neurología, Vall d'Hebron Hospital Universitari, Vall d'Hebron Barcelona Hospital Campus, Barcelona, Spain
| | - V Sala
- Unidad de Ictus, Servicio de Neurología, Vall d'Hebron Hospital Universitari, Vall d'Hebron Barcelona Hospital Campus, Barcelona, Spain
| | - M Muchada
- Unidad de Ictus, Servicio de Neurología, Vall d'Hebron Hospital Universitari, Vall d'Hebron Barcelona Hospital Campus, Barcelona, Spain
| | - S Boned
- Unidad de Ictus, Servicio de Neurología, Vall d'Hebron Hospital Universitari, Vall d'Hebron Barcelona Hospital Campus, Barcelona, Spain
| | - J M Juega
- Unidad de Ictus, Servicio de Neurología, Vall d'Hebron Hospital Universitari, Vall d'Hebron Barcelona Hospital Campus, Barcelona, Spain
| | - J Pagola
- Unidad de Ictus, Servicio de Neurología, Vall d'Hebron Hospital Universitari, Vall d'Hebron Barcelona Hospital Campus, Barcelona, Spain
| | - Á García-Tornel
- Unidad de Ictus, Servicio de Neurología, Vall d'Hebron Hospital Universitari, Vall d'Hebron Barcelona Hospital Campus, Barcelona, Spain
| | - M Requena
- Unidad de Ictus, Servicio de Neurología, Vall d'Hebron Hospital Universitari, Vall d'Hebron Barcelona Hospital Campus, Barcelona, Spain
| | - N Rodríguez-Villatoro
- Unidad de Ictus, Servicio de Neurología, Vall d'Hebron Hospital Universitari, Vall d'Hebron Barcelona Hospital Campus, Barcelona, Spain
| | - D Rodríguez-Luna
- Unidad de Ictus, Servicio de Neurología, Vall d'Hebron Hospital Universitari, Vall d'Hebron Barcelona Hospital Campus, Barcelona, Spain
| | - M Deck
- Unidad de Ictus, Servicio de Neurología, Vall d'Hebron Hospital Universitari, Vall d'Hebron Barcelona Hospital Campus, Barcelona, Spain
| | - M Ribo
- Unidad de Ictus, Servicio de Neurología, Vall d'Hebron Hospital Universitari, Vall d'Hebron Barcelona Hospital Campus, Barcelona, Spain
| | - C A Molina
- Unidad de Ictus, Servicio de Neurología, Vall d'Hebron Hospital Universitari, Vall d'Hebron Barcelona Hospital Campus, Barcelona, Spain
| | - P Meler
- Unidad de Ictus, Servicio de Neurología, Vall d'Hebron Hospital Universitari, Vall d'Hebron Barcelona Hospital Campus, Barcelona, Spain
| | - V Romero
- Unidad de Ictus, Servicio de Neurología, Vall d'Hebron Hospital Universitari, Vall d'Hebron Barcelona Hospital Campus, Barcelona, Spain
| | - G Dalmases
- Unidad de Ictus, Servicio de Neurología, Vall d'Hebron Hospital Universitari, Vall d'Hebron Barcelona Hospital Campus, Barcelona, Spain
| | - M T Rodríguez-Samaniego
- Unidad de Ictus, Servicio de Neurología, Vall d'Hebron Hospital Universitari, Vall d'Hebron Barcelona Hospital Campus, Barcelona, Spain
| | - L Calleja
- Unidad de Ictus, Servicio de Neurología, Vall d'Hebron Hospital Universitari, Vall d'Hebron Barcelona Hospital Campus, Barcelona, Spain
| | - T Gutierrez
- Unidad de Ictus, Servicio de Neurología, Vall d'Hebron Hospital Universitari, Vall d'Hebron Barcelona Hospital Campus, Barcelona, Spain
| | - L Peña
- Unidad de Ictus, Servicio de Neurología, Vall d'Hebron Hospital Universitari, Vall d'Hebron Barcelona Hospital Campus, Barcelona, Spain
| | - J C Gallego
- Unidad de Ictus, Servicio de Neurología, Vall d'Hebron Hospital Universitari, Vall d'Hebron Barcelona Hospital Campus, Barcelona, Spain
| | - E Lorenzo
- Unidad de Ictus, Servicio de Neurología, Vall d'Hebron Hospital Universitari, Vall d'Hebron Barcelona Hospital Campus, Barcelona, Spain
| | - Y Gonzalez
- Unidad de Ictus, Servicio de Neurología, Vall d'Hebron Hospital Universitari, Vall d'Hebron Barcelona Hospital Campus, Barcelona, Spain
| | - R Moreno
- Unidad de Ictus, Servicio de Neurología, Vall d'Hebron Hospital Universitari, Vall d'Hebron Barcelona Hospital Campus, Barcelona, Spain
| | - M Rubiera
- Unidad de Ictus, Servicio de Neurología, Vall d'Hebron Hospital Universitari, Vall d'Hebron Barcelona Hospital Campus, Barcelona, Spain
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8
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Fahmi AM, Summers S, Jones M, Bowler B, Hennige S, Gutierrez T. Effect of ocean acidification on the growth, response and hydrocarbon degradation of coccolithophore-bacterial communities exposed to crude oil. Sci Rep 2023; 13:5013. [PMID: 36973465 PMCID: PMC10042988 DOI: 10.1038/s41598-023-31784-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2022] [Accepted: 03/17/2023] [Indexed: 03/29/2023] Open
Abstract
Hydrocarbon-degrading bacteria, which can be found living with eukaryotic phytoplankton, play a pivotal role in the fate of oil spillage to the marine environment. Considering the susceptibility of calcium carbonate-bearing phytoplankton under future ocean acidification conditions and their oil-degrading communities to oil exposure under such conditions, we investigated the response of non-axenic E. huxleyi to crude oil under ambient versus elevated CO2 concentrations. Under elevated CO2 conditions, exposure to crude oil resulted in the immediate decline of E. huxleyi, with concomitant shifts in the relative abundance of Alphaproteobacteria and Gammaproteobacteria. Survival of E. huxleyi under ambient conditions following oil enrichment was likely facilitated by enrichment of oil-degraders Methylobacterium and Sphingomonas, while the increase in relative abundance of Marinobacter and unclassified Gammaproteobacteria may have increased competitive pressure with E. huxleyi for micronutrient acquisition. Biodegradation of the oil was not affected by elevated CO2 despite a shift in relative abundance of known and putative hydrocarbon degraders. While ocean acidification does not appear to affect microbial degradation of crude oil, elevated mortality responses of E. huxleyi and shifts in the bacterial community illustrates the complexity of microalgal-bacterial interactions and highlights the need to factor these into future ecosystem recovery projections.
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Affiliation(s)
- Afiq Mohd Fahmi
- School of Engineering and Physical Science, Heriot-Watt University, Edinburgh, EH14 4AS, UK
- Fakulti Sains dan Sekitaran Marin, Universiti Malaysia Terengganu, 21030, Kuala, Terengganu, Malaysia
| | - Stephen Summers
- School of Engineering and Physical Science, Heriot-Watt University, Edinburgh, EH14 4AS, UK
- The Singapore Centre for Environmental Life Sciences Engineering and the School of Biological Sciences, Nanyang Technological University, Singapore, 637551, Singapore
| | - Martin Jones
- School of Civil Engineering and Geosciences, Newcastle University, Newcastle Upon Tyne, NE17RU, UK
| | - Bernard Bowler
- School of Civil Engineering and Geosciences, Newcastle University, Newcastle Upon Tyne, NE17RU, UK
| | - Sebastian Hennige
- School of Geosciences, University of Edinburgh, Edinburgh, EH9 3JW, UK.
| | - Tony Gutierrez
- School of Engineering and Physical Science, Heriot-Watt University, Edinburgh, EH14 4AS, UK.
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9
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Omeyer LCM, Duncan EM, Aiemsomboon K, Beaumont N, Bureekul S, Cao B, Carrasco LR, Chavanich S, Clark JR, Cordova MR, Couceiro F, Cragg SM, Dickson N, Failler P, Ferraro G, Fletcher S, Fong J, Ford AT, Gutierrez T, Hamid FS, Hiddink JG, Hoa PT, Holland SI, Jones L, Jones NH, Koldewey H, Lauro FM, Lee C, Lewis M, Marks D, Matallana-Surget S, Mayorga-Adame CG, McGeehan J, Messer LF, Michie L, Miller MA, Mohamad ZF, Nor NHM, Müller M, Neill SP, Nelms SE, Onda DFL, Ong JJL, Pariatamby A, Phang SC, Quilliam R, Robins PE, Salta M, Sartimbul A, Shakuto S, Skov MW, Taboada EB, Todd PA, Toh TC, Valiyaveettil S, Viyakarn V, Wonnapinij P, Wood LE, Yong CLX, Godley BJ. Corrigendum to "Priorities to inform research on marine plastic pollution in Southeast Asia" [Sci. Total Environ. volume 841 (2022) Article 156704]. Sci Total Environ 2023; 857:159595. [PMID: 36308807 DOI: 10.1016/j.scitotenv.2022.159595] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Affiliation(s)
- Lucy C M Omeyer
- Centre for Ecology and Conservation, University of Exeter, Penryn Campus, Penryn, Cornwall TR10 9EZ, United Kingdom.
| | - Emily M Duncan
- Centre for Ecology and Conservation, University of Exeter, Penryn Campus, Penryn, Cornwall TR10 9EZ, United Kingdom; OKEANOS, Universidade dos Açores, Departamento de Oceanografia e Pescas, 9901-862 Horta, Portugal.
| | - Kornrawee Aiemsomboon
- Department of Marine Science, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand
| | - Nicola Beaumont
- Plymouth Marine Laboratory, Prospect Place, The Hoe, Plymouth, Devon PL1 3DH, United Kingdom
| | - Sujaree Bureekul
- Department of Marine Science, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand
| | - Bin Cao
- Singapore Centre for Environmental Life Sciences Engineering, Nanyang Technological University, 637551, Singapore; School of Civil and Environmental Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore
| | - Luis R Carrasco
- Department of Biological Sciences, National University of Singapore, 14 Science Drive 4, 117543, Singapore
| | - Suchana Chavanich
- Department of Marine Science, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand; Aquatic Resources Research Institute Chulalongkorn University, Bangkok 10330, Thailand
| | - James R Clark
- Plymouth Marine Laboratory, Prospect Place, The Hoe, Plymouth, Devon PL1 3DH, United Kingdom
| | - Muhammad R Cordova
- Research Centre for Oceanography, Indonesian Institute of Sciences (LIPI), Jalan Pasir Putih 1, Ancol Timur, Jakarta 14430, Indonesia; Research Centre for Oceanography, National Research and Innovation Agency (BRIN), Jalan Pasir Putih 1, Ancol Timur, Jakarta 14430, Indonesia
| | - Fay Couceiro
- School of Civil Engineering and Surveying, Faculty of Technology, University of Portsmouth, Portsmouth, Hampshire, PO1 3AH, United Kingdom
| | - Simon M Cragg
- Institute of Marine Sciences, University of Portsmouth, Portsmouth, Hampshire, PO4 9LY, United Kingdom; Centre for Enzyme Innovation, School of Biological Sciences, University of Portsmouth, Portsmouth, Hampshire, PO1 2DY, United Kingdom
| | - Neil Dickson
- School of Ocean Sciences, Bangor University, Menai Bridge, Anglesey LL59 5AB, United Kingdom
| | - Pierre Failler
- Centre for Blue Governance, Department of Economics and Finance, University of Portsmouth, Portsmouth, Hampshire, PO1 3DE, United Kingdom
| | - Gianluca Ferraro
- Centre for Blue Governance, Department of Economics and Finance, University of Portsmouth, Portsmouth, Hampshire, PO1 3DE, United Kingdom
| | - Stephen Fletcher
- School of the Environment, Geography and Geosciences, University of Portsmouth, Portsmouth, Hampshire, PO1 3DE, United Kingdom; UN Environment World Conservation Monitoring Centre, Cambridge, United Kingdom
| | - Jenny Fong
- Tropical Marine Science Institute, National University of Singapore, Singapore
| | - Alex T Ford
- Institute of Marine Sciences, University of Portsmouth, Portsmouth, Hampshire, PO4 9LY, United Kingdom
| | - Tony Gutierrez
- School of Engineering and Physical Sciences, Institute of Mechanical, Process and Energy Engineering, Heriot-Watt University, Edinburgh, United Kingdom
| | - Fauziah Shahul Hamid
- Centre for Research in Waste Management, Institute of Biological Sciences, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia
| | - Jan G Hiddink
- School of Ocean Sciences, Bangor University, Menai Bridge, Anglesey LL59 5AB, United Kingdom
| | - Pham T Hoa
- School of Biotechnology, International University, Vietnam National University, Ho Chi Hinh City, Viet Nam
| | - Sophie I Holland
- School of Engineering and Physical Sciences, Institute of Mechanical, Process and Energy Engineering, Heriot-Watt University, Edinburgh, United Kingdom
| | - Lowenna Jones
- Centre for Ecology and Conservation, University of Exeter, Penryn Campus, Penryn, Cornwall TR10 9EZ, United Kingdom; Department of Politics and International Relations, Faculty of Social Sciences, University of Sheffield, Western Bank, Sheffield S10 2TN, United Kingdom
| | - Nia H Jones
- School of Ocean Sciences, Bangor University, Menai Bridge, Anglesey LL59 5AB, United Kingdom
| | - Heather Koldewey
- Centre for Ecology and Conservation, University of Exeter, Penryn Campus, Penryn, Cornwall TR10 9EZ, United Kingdom; Zoological Society of London, London, United Kingdom
| | - Federico M Lauro
- Singapore Centre for Environmental Life Sciences Engineering, Nanyang Technological University, 637551, Singapore; Asian School of the Environment, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore
| | - Charlotte Lee
- Division of Biological and Environmental Sciences, Faculty of Natural Sciences, University of Stirling, Stirling, FK9 4LA, United Kingdom
| | - Matt Lewis
- School of Ocean Sciences, Bangor University, Menai Bridge, Anglesey LL59 5AB, United Kingdom
| | - Danny Marks
- School of Law and Government, Dublin City University, Dublin 9, Dublin, Ireland
| | - Sabine Matallana-Surget
- Division of Biological and Environmental Sciences, Faculty of Natural Sciences, University of Stirling, Stirling, FK9 4LA, United Kingdom
| | | | - John McGeehan
- Centre for Enzyme Innovation, School of Biological Sciences, University of Portsmouth, Portsmouth, Hampshire, PO1 2DY, United Kingdom
| | - Lauren F Messer
- Division of Biological and Environmental Sciences, Faculty of Natural Sciences, University of Stirling, Stirling, FK9 4LA, United Kingdom
| | - Laura Michie
- Institute of Marine Sciences, University of Portsmouth, Portsmouth, Hampshire, PO4 9LY, United Kingdom
| | - Michelle A Miller
- Asia Research Institute, National University of Singapore, Singapore
| | - Zeeda F Mohamad
- Department of Science and Technology Studies, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia
| | - Nur Hazimah Mohamed Nor
- Asian School of the Environment, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore
| | - Moritz Müller
- Faculty of Engineering, Computing and Science, Swinburne University of Technology Sarawak Campus, Kuching 93350, Malaysia
| | - Simon P Neill
- School of Ocean Sciences, Bangor University, Menai Bridge, Anglesey LL59 5AB, United Kingdom
| | - Sarah E Nelms
- Centre for Ecology and Conservation, University of Exeter, Penryn Campus, Penryn, Cornwall TR10 9EZ, United Kingdom
| | - Deo Florence L Onda
- The Marine Science Institute, Velasquez St., University of the Philippines, Diliman, Quezon City 1101, Philippines
| | - Joyce J L Ong
- Asian School of the Environment, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore
| | - Agamuthu Pariatamby
- Jeffrey Sachs Centre on Sustainable Development, Sunway University, Selangor Darul Ehsan, 47500, Malaysia
| | - Sui C Phang
- Centre for Blue Governance, Department of Economics and Finance, University of Portsmouth, Portsmouth, Hampshire, PO1 3DE, United Kingdom; The Nature Conservancy, London Office, 5 Chancery Lane Suite 403, London WC2A 1LG, United Kingdom
| | - Richard Quilliam
- Division of Biological and Environmental Sciences, Faculty of Natural Sciences, University of Stirling, Stirling, FK9 4LA, United Kingdom
| | - Peter E Robins
- School of Ocean Sciences, Bangor University, Menai Bridge, Anglesey LL59 5AB, United Kingdom
| | - Maria Salta
- School of Biological Sciences, University of Portsmouth, Portsmouth, Hampshire PO1 2DY, United Kingdom
| | - Aida Sartimbul
- Faculty of Fisheries and Marine Sciences, Universitas Brawijaya, Malang 65145, East Java, Indonesia; Marine Resources Exploration and Management (MEXMA) Research Group, Universitas Brawijaya, Malang 65145, East Java, Indonesia
| | - Shiori Shakuto
- Department of Anthropology, School of Social and Political Sciences, The University of Sydney, Social Sciences Building, NSW 2006, Australia
| | - Martin W Skov
- School of Ocean Sciences, Bangor University, Menai Bridge, Anglesey LL59 5AB, United Kingdom
| | - Evelyn B Taboada
- BioProcess Engineering and Research Centre, Department of Chemical Engineering, School of Engineering, University of San Carlos, Cebu City 6000, Philippines
| | - Peter A Todd
- Experimental Marine Ecology Laboratory, Department of Biological Sciences, National University of Singapore, 16 Science Drive 4, 117558, Singapore
| | - Tai Chong Toh
- Tropical Marine Science Institute, National University of Singapore, Singapore; College of Alice & Peter Tan, National University of Singapore, 8 College Avenue East, 138615, Singapore
| | - Suresh Valiyaveettil
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, 117543, Singapore
| | - Voranop Viyakarn
- Department of Marine Science, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand; Aquatic Resources Research Institute Chulalongkorn University, Bangkok 10330, Thailand
| | - Passorn Wonnapinij
- Department of Genetics, Faculty of Science, Kasetsart University, Bangkok 10900, Thailand; Centre for Advanced Studies in Tropical Natural Resources, Kasetsart University, Bangkok 10900, Thailand; Omics Center for Agriculture, Bioresources, Food and Health, Kasetsart University (OmiKU), Bangkok 10900, Thailand
| | - Louisa E Wood
- Centre for Blue Governance, Department of Economics and Finance, University of Portsmouth, Portsmouth, Hampshire, PO1 3DE, United Kingdom
| | - Clara L X Yong
- Experimental Marine Ecology Laboratory, Department of Biological Sciences, National University of Singapore, 16 Science Drive 4, 117558, Singapore
| | - Brendan J Godley
- Centre for Ecology and Conservation, University of Exeter, Penryn Campus, Penryn, Cornwall TR10 9EZ, United Kingdom
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10
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Omeyer LCM, Duncan EM, Aiemsomboon K, Beaumont N, Bureekul S, Cao B, Carrasco LR, Chavanich S, Clark JR, Cordova MR, Couceiro F, Cragg SM, Dickson N, Failler P, Ferraro G, Fletcher S, Fong J, Ford AT, Gutierrez T, Shahul Hamid F, Hiddink JG, Hoa PT, Holland SI, Jones L, Jones NH, Koldewey H, Lauro FM, Lee C, Lewis M, Marks D, Matallana-Surget S, Mayorga-Adame CG, McGeehan J, Messer LF, Michie L, Miller MA, Mohamad ZF, Nor NHM, Müller M, Neill SP, Nelms SE, Onda DFL, Ong JJL, Pariatamby A, Phang SC, Quilliam R, Robins PE, Salta M, Sartimbul A, Shakuto S, Skov MW, Taboada EB, Todd PA, Toh TC, Valiyaveettil S, Viyakarn V, Wonnapinij P, Wood LE, Yong CLX, Godley BJ. Priorities to inform research on marine plastic pollution in Southeast Asia. Sci Total Environ 2022; 841:156704. [PMID: 35718174 DOI: 10.1016/j.scitotenv.2022.156704] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2022] [Revised: 06/07/2022] [Accepted: 06/10/2022] [Indexed: 06/15/2023]
Abstract
Southeast Asia is considered to have some of the highest levels of marine plastic pollution in the world. It is therefore vitally important to increase our understanding of the impacts and risks of plastic pollution to marine ecosystems and the essential services they provide to support the development of mitigation measures in the region. An interdisciplinary, international network of experts (Australia, Indonesia, Ireland, Malaysia, the Philippines, Singapore, Thailand, the United Kingdom, and Vietnam) set a research agenda for marine plastic pollution in the region, synthesizing current knowledge and highlighting areas for further research in Southeast Asia. Using an inductive method, 21 research questions emerged under five non-predefined key themes, grouping them according to which: (1) characterise marine plastic pollution in Southeast Asia; (2) explore its movement and fate across the region; (3) describe the biological and chemical modifications marine plastic pollution undergoes; (4) detail its environmental, social, and economic impacts; and, finally, (5) target regional policies and possible solutions. Questions relating to these research priority areas highlight the importance of better understanding the fate of marine plastic pollution, its degradation, and the impacts and risks it can generate across communities and different ecosystem services. Knowledge of these aspects will help support actions which currently suffer from transboundary problems, lack of responsibility, and inaction to tackle the issue from its point source in the region. Being profoundly affected by marine plastic pollution, Southeast Asian countries provide an opportunity to test the effectiveness of innovative and socially inclusive changes in marine plastic governance, as well as both high and low-tech solutions, which can offer insights and actionable models to the rest of the world.
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Affiliation(s)
- Lucy C M Omeyer
- Centre for Ecology and Conservation, University of Exeter, Penryn Campus, Penryn, Cornwall TR10 9EZ, United Kingdom.
| | - Emily M Duncan
- Centre for Ecology and Conservation, University of Exeter, Penryn Campus, Penryn, Cornwall TR10 9EZ, United Kingdom; Institute of Marine Sciences - Okeanos, University of the Azores, Rua Professor Doutor Frederico Machado 4, 9901-862 Horta, Portugal.
| | - Kornrawee Aiemsomboon
- Department of Marine Science, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand
| | - Nicola Beaumont
- Plymouth Marine Laboratory, Prospect Place, The Hoe, Plymouth, Devon PL1 3DH, United Kingdom
| | - Sujaree Bureekul
- Department of Marine Science, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand
| | - Bin Cao
- Singapore Centre for Environmental Life Sciences Engineering, Nanyang Technological University, 637551, Singapore; School of Civil and Environmental Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore
| | - Luis R Carrasco
- Department of Biological Sciences, National University of Singapore, 14 Science Drive 4, 117543, Singapore
| | - Suchana Chavanich
- Department of Marine Science, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand; Aquatic Resources Research Institute Chulalongkorn University, Bangkok 10330, Thailand
| | - James R Clark
- Plymouth Marine Laboratory, Prospect Place, The Hoe, Plymouth, Devon PL1 3DH, United Kingdom
| | - Muhammad R Cordova
- Research Centre for Oceanography, Indonesian Institute of Sciences (LIPI), Jalan Pasir Putih 1, Ancol Timur, Jakarta 14430, Indonesia; Research Centre for Oceanography, National Research and Innovation Agency (BRIN), Jalan Pasir Putih 1, Ancol Timur, Jakarta 14430, Indonesia
| | - Fay Couceiro
- School of Civil Engineering and Surveying, Faculty of Technology, University of Portsmouth, Portsmouth, Hampshire PO1 3AH, United Kingdom
| | - Simon M Cragg
- Institute of Marine Sciences, University of Portsmouth, Portsmouth, Hampshire PO4 9LY, United Kingdom; Centre for Enzyme Innovation, School of Biological Sciences, University of Portsmouth, Portsmouth, Hampshire PO1 2DY, United Kingdom
| | - Neil Dickson
- School of Ocean Sciences, Bangor University, Menai Bridge, Anglesey LL59 5AB, United Kingdom
| | - Pierre Failler
- Centre for Blue Governance, Department of Economics and Finance, University of Portsmouth, Portsmouth, Hampshire PO1 3DE, United Kingdom
| | - Gianluca Ferraro
- Centre for Blue Governance, Department of Economics and Finance, University of Portsmouth, Portsmouth, Hampshire PO1 3DE, United Kingdom
| | - Stephen Fletcher
- School of the Environment, Geography and Geosciences, University of Portsmouth, Portsmouth, Hampshire PO1 3DE, United Kingdom; UN Environment World Conservation Monitoring Centre, Cambridge, United Kingdom
| | - Jenny Fong
- Tropical Marine Science Institute, National University of Singapore, Singapore
| | - Alex T Ford
- Institute of Marine Sciences, University of Portsmouth, Portsmouth, Hampshire PO4 9LY, United Kingdom
| | - Tony Gutierrez
- School of Engineering and Physical Sciences, Institute of Mechanical, Process and Energy Engineering, Heriot-Watt University, Edinburgh, United Kingdom
| | - Fauziah Shahul Hamid
- Centre for Research in Waste Management, Institute of Biological Sciences, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia
| | - Jan G Hiddink
- School of Ocean Sciences, Bangor University, Menai Bridge, Anglesey LL59 5AB, United Kingdom
| | - Pham T Hoa
- School of Biotechnology, International University, Vietnam National University, Ho Chi Hinh City, Viet Nam
| | - Sophie I Holland
- School of Engineering and Physical Sciences, Institute of Mechanical, Process and Energy Engineering, Heriot-Watt University, Edinburgh, United Kingdom
| | - Lowenna Jones
- Centre for Ecology and Conservation, University of Exeter, Penryn Campus, Penryn, Cornwall TR10 9EZ, United Kingdom; Department of Politics and International Relations, Faculty of Social Sciences, University of Sheffield, Western Bank, Sheffield S10 2TN, United Kingdom
| | - Nia H Jones
- School of Ocean Sciences, Bangor University, Menai Bridge, Anglesey LL59 5AB, United Kingdom
| | - Heather Koldewey
- Centre for Ecology and Conservation, University of Exeter, Penryn Campus, Penryn, Cornwall TR10 9EZ, United Kingdom; Zoological Society of London, London, United Kingdom
| | - Federico M Lauro
- Singapore Centre for Environmental Life Sciences Engineering, Nanyang Technological University, 637551, Singapore; Asian School of the Environment, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore
| | - Charlotte Lee
- Division of Biological and Environmental Sciences, Faculty of Natural Sciences, University of Stirling, Stirling FK9 4LA, United Kingdom
| | - Matt Lewis
- School of Ocean Sciences, Bangor University, Menai Bridge, Anglesey LL59 5AB, United Kingdom
| | - Danny Marks
- School of Law and Government, Dublin City University, Dublin 9 Dublin, Ireland
| | - Sabine Matallana-Surget
- Division of Biological and Environmental Sciences, Faculty of Natural Sciences, University of Stirling, Stirling FK9 4LA, United Kingdom
| | | | - John McGeehan
- Centre for Enzyme Innovation, School of Biological Sciences, University of Portsmouth, Portsmouth, Hampshire PO1 2DY, United Kingdom
| | - Lauren F Messer
- Division of Biological and Environmental Sciences, Faculty of Natural Sciences, University of Stirling, Stirling FK9 4LA, United Kingdom
| | - Laura Michie
- Institute of Marine Sciences, University of Portsmouth, Portsmouth, Hampshire PO4 9LY, United Kingdom
| | - Michelle A Miller
- Asia Research Institute, National University of Singapore, Singapore
| | - Zeeda F Mohamad
- Department of Science and Technology Studies, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia
| | - Nur Hazimah Mohamed Nor
- Asian School of the Environment, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore
| | - Moritz Müller
- Faculty of Engineering, Computing and Science, Swinburne University of Technology Sarawak Campus, Kuching 93350, Malaysia
| | - Simon P Neill
- School of Ocean Sciences, Bangor University, Menai Bridge, Anglesey LL59 5AB, United Kingdom
| | - Sarah E Nelms
- Centre for Ecology and Conservation, University of Exeter, Penryn Campus, Penryn, Cornwall TR10 9EZ, United Kingdom
| | - Deo Florence L Onda
- The Marine Science Institute, Velasquez St., University of the Philippines, Diliman, Quezon City 1101, Philippines
| | - Joyce J L Ong
- Asian School of the Environment, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore
| | - Agamuthu Pariatamby
- Jeffrey Sachs Centre on Sustainable Development, Sunway University, Selangor Darul Ehsan 47500, Malaysia
| | - Sui C Phang
- Centre for Blue Governance, Department of Economics and Finance, University of Portsmouth, Portsmouth, Hampshire PO1 3DE, United Kingdom; The Nature Conservancy, London Office, 5 Chancery Lane Suite 403, London WC2A 1LG, United Kingdom
| | - Richard Quilliam
- Division of Biological and Environmental Sciences, Faculty of Natural Sciences, University of Stirling, Stirling FK9 4LA, United Kingdom
| | - Peter E Robins
- School of Ocean Sciences, Bangor University, Menai Bridge, Anglesey LL59 5AB, United Kingdom
| | - Maria Salta
- School of Biological Sciences, University of Portsmouth, Portsmouth, Hampshire PO1 2DY, United Kingdom
| | - Aida Sartimbul
- Faculty of Fisheries and Marine Sciences, Universitas Brawijaya, Malang 65145, East Java, Indonesia; Marine Resources Exploration and Management (MEXMA) Research Group, Universitas Brawijaya, Malang 65145, East Java, Indonesia
| | - Shiori Shakuto
- Department of Anthropology, School of Social and Political Sciences, The University of Sydney, Social Sciences Building, NSW 2006, Australia
| | - Martin W Skov
- School of Ocean Sciences, Bangor University, Menai Bridge, Anglesey LL59 5AB, United Kingdom
| | - Evelyn B Taboada
- BioProcess Engineering and Research Centre, Department of Chemical Engineering, School of Engineering, University of San Carlos, Cebu City 6000, Philippines
| | - Peter A Todd
- Experimental Marine Ecology Laboratory, Department of Biological Sciences, National University of Singapore, 16 Science Drive 4, 117558, Singapore
| | - Tai Chong Toh
- Tropical Marine Science Institute, National University of Singapore, Singapore; College of Alice & Peter Tan, National University of Singapore, 8 College Avenue East, 138615, Singapore
| | - Suresh Valiyaveettil
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, 117543, Singapore
| | - Voranop Viyakarn
- Department of Marine Science, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand; Aquatic Resources Research Institute Chulalongkorn University, Bangkok 10330, Thailand
| | - Passorn Wonnapinij
- Department of Genetics, Faculty of Science, Kasetsart University, Bangkok 10900, Thailand; Centre for Advanced Studies in Tropical Natural Resources, Kasetsart University, Bangkok 10900, Thailand; Omics Center for Agriculture, Bioresources, Food and Health, Kasetsart University (OmiKU), Bangkok 10900, Thailand
| | - Louisa E Wood
- Centre for Blue Governance, Department of Economics and Finance, University of Portsmouth, Portsmouth, Hampshire PO1 3DE, United Kingdom
| | - Clara L X Yong
- Experimental Marine Ecology Laboratory, Department of Biological Sciences, National University of Singapore, 16 Science Drive 4, 117558, Singapore
| | - Brendan J Godley
- Centre for Ecology and Conservation, University of Exeter, Penryn Campus, Penryn, Cornwall TR10 9EZ, United Kingdom
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11
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Nikolova C, Ijaz UZ, Gutierrez T. Exploration of marine bacterioplankton community assembly mechanisms during chemical dispersant and surfactant-assisted oil biodegradation. Ecol Evol 2021; 11:13862-13874. [PMID: 34707823 PMCID: PMC8525123 DOI: 10.1002/ece3.8091] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2021] [Revised: 08/13/2021] [Accepted: 08/17/2021] [Indexed: 11/07/2022] Open
Abstract
Assembly processes in marine microbial communities amended with crude oil and chemical dispersant are poorly understood and even more so when biosurfactants are used. We set up a microcosm experiment in which microbiome structure was analyzed using 16S rRNA gene amplicon sequencing and six null models to better understand and quantify the mechanisms and patterns controlling the assembly of a marine crude oil degrading microbial community in the presence of chemical dispersant or rhamnolipid biosurfactant. Although each null model quantifies different aspects of the community assembly, there was a general agreement that neither purely stochastic nor purely deterministic processes dominated the microbial communities, and their influence was variable over time. Determinism was dominant in the early phase of incubation, while stochasticity was prevalent in the middle and late stages. There was faster recruitment of phylogenetically distant species in the dispersant-amended community compared to oil-only or rhamnolipid-amended communities. This analysis provides important insights of how chemical dispersants and rhamnolipid influence microbial communities' dynamics and identified which groups may be excluded-an important consideration for biodegradation process and oil spill response.
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Affiliation(s)
- Christina Nikolova
- Institute of Mechanical, Process and Energy EngineeringSchool of Engineering and Physical SciencesHeriot‐Watt UniversityEdinburghUK
| | | | - Tony Gutierrez
- Institute of Mechanical, Process and Energy EngineeringSchool of Engineering and Physical SciencesHeriot‐Watt UniversityEdinburghUK
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12
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Nikolova CN, Ijaz UZ, Magill C, Kleindienst S, Joye SB, Gutierrez T. Response and oil degradation activities of a northeast Atlantic bacterial community to biogenic and synthetic surfactants. Microbiome 2021; 9:191. [PMID: 34548108 PMCID: PMC8456599 DOI: 10.1186/s40168-021-01143-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2021] [Accepted: 08/12/2021] [Indexed: 05/03/2023]
Abstract
BACKGROUND Biosurfactants are naturally derived products that play a similar role to synthetic dispersants in oil spill response but are easily biodegradable and less toxic. Using a combination of analytical chemistry, 16S rRNA amplicon sequencing and simulation-based approaches, this study investigated the microbial community dynamics, ecological drivers, functional diversity and robustness, and oil biodegradation potential of a northeast Atlantic marine microbial community to crude oil when exposed to rhamnolipid or synthetic dispersant Finasol OSR52. RESULTS Psychrophilic Colwellia and Oleispira dominated the community in both the rhamnolipid and Finasol OSR52 treatments initially but later community structure across treatments diverged significantly: Rhodobacteraceae and Vibrio dominated the Finasol-amended treatment, whereas Colwellia, Oleispira, and later Cycloclasticus and Alcanivorax, dominated the rhamnolipid-amended treatment. Key aromatic hydrocarbon-degrading bacteria, like Cycloclasticus, was not observed in the Finasol treatment but it was abundant in the oil-only and rhamnolipid-amended treatments. Overall, Finasol had a significant negative impact on the community diversity, weakened the taxa-functional robustness of the community, and caused a stronger environmental filtering, more so than oil-only and rhamnolipid-amended oil treatments. Rhamnolipid-amended and oil-only treatments had the highest functional diversity, however, the overall oil biodegradation was greater in the Finasol treatment, but aromatic biodegradation was highest in the rhamnolipid treatment. CONCLUSION Overall, the natural marine microbial community in the northeast Atlantic responded differently to crude oil dispersed with either synthetic or biogenic surfactants over time, but oil degradation was more enhanced by the synthetic dispersant. Collectively, our results advance the understanding of how rhamnolipid biosurfactants and synthetic dispersant Finasol affect the natural marine microbial community in the FSC, supporting their potential application in oil spills. Video abstract.
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Affiliation(s)
- Christina N Nikolova
- Institute of Mechanical, Process and Energy Engineering, School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh, EH14 4AS, UK
| | | | - Clayton Magill
- Institute for GeoEnergy Engineering, School of Energy, Geoscience, Infrastructure and Society, The Lyell Centre, Edinburgh, EH14 4AS, UK
| | - Sara Kleindienst
- Center for Applied Geosciences, Eberhard Karls University of Tübingen, Tübingen, Germany
| | - Samantha B Joye
- Department of Marine Sciences, The University of Georgia, Athens, GA, USA
| | - Tony Gutierrez
- Institute of Mechanical, Process and Energy Engineering, School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh, EH14 4AS, UK.
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13
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Thompson HF, Gutierrez T. Detection of hydrocarbon-degrading bacteria on deepwater corals of the northeast Atlantic using CARD-FISH. J Microbiol Methods 2021; 187:106277. [PMID: 34237402 DOI: 10.1016/j.mimet.2021.106277] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2021] [Revised: 06/30/2021] [Accepted: 06/30/2021] [Indexed: 11/28/2022]
Abstract
Recently, studies have begun to identify oil-degrading bacteria and host-taxon specific bacterial assemblages associated with the coral holobiont, including deep-sea cold-water corals, which are thought to provide metabolic functions and additional carbon sources to their coral hosts. Here, we describe the identification of Marinobacter on the soft tissue of Lophelia pertusa coral polyps by Catalyzed Reporter Deposition Fluorescence in situ Hybridization (CARD-FISH). L. pertusa samples from three reef sites in the northeast Atlantic (Logachev, Mingulay and Pisces) were collected at depth by vacuum seal to eliminate contamination issues. After decalcification, histological processing and sagittal sectioning of the soft coral polyp tissues, the 16S rRNA-targeted oligonucleotide HRP-labelled probe Mrb-0625-a, and Cyanine 3 (Cy3)-labelled tyramides, were used to identify members of the hydrocarbon-degrading genus Marinobacter. Mrb-0625-a-hybridized bacterial cell signals were detected in different anatomical sites of all polyps collected from each of the three reef sites, suggesting a close, possibly intimate, association between them, but the purpose of which remains unknown. We posit that Marinobacter, and possibly other hydrocarbon-degrading bacteria associated with Lophelia, may confer the coral with the ability to cope with toxic levels of hydrocarbons in regions of natural oil seepage and where there is an active oil and gas industry presence.
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Affiliation(s)
- Haydn Frank Thompson
- Institute of Mechanical, Process and Energy Engineering, School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, United Kingdom
| | - Tony Gutierrez
- Institute of Mechanical, Process and Energy Engineering, School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, United Kingdom.
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14
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Assil Z, Esegbue O, Mašek O, Gutierrez T, Free A. Corrigendum to "Specific enrichment of hydrocarbonclastic bacteria from diesel-amended soil on biochar particles" [Sci. Total Environ. (2021) 762:143084]. Sci Total Environ 2021; 776:146796. [PMID: 33838931 DOI: 10.1016/j.scitotenv.2021.146796] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Affiliation(s)
- Zhansaya Assil
- School of Biological Sciences, University of Edinburgh, Edinburgh EH9 3FF, UK
| | | | - Ondřej Mašek
- UK Biochar Research Centre, School of GeoSciences, University of Edinburgh, Edinburgh, EH9 3FF, UK
| | - Tony Gutierrez
- School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, UK
| | - Andrew Free
- School of Biological Sciences, University of Edinburgh, Edinburgh EH9 3FF, UK.
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15
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Anae J, Ahmad N, Kumar V, Thakur VK, Gutierrez T, Yang XJ, Cai C, Yang Z, Coulon F. Recent advances in biochar engineering for soil contaminated with complex chemical mixtures: Remediation strategies and future perspectives. Sci Total Environ 2021; 767:144351. [PMID: 33453509 DOI: 10.1016/j.scitotenv.2020.144351] [Citation(s) in RCA: 41] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Revised: 12/04/2020] [Accepted: 12/05/2020] [Indexed: 06/12/2023]
Abstract
Heavy metal/metalloids (HMs) and polycyclic aromatic hydrocarbons (PAHs) in soil have caused serious environmental problems, compromised agriculture quality, and have detrimental effects on all forms of life including humans. There is a need to develop appropriate and effective remediation methods to resolve combined contaminated problems. Although conventional technologies exist to tackle contaminated soils, application of biochar as an effective renewable adsorbent for enhanced bioremediation is considered by many scientific researchers as a promising strategy to mitigate HM/PAH co-contaminated soils. This review aims to: (i) provide an overview of biochar preparation and its application, and (ii) critically discuss and examine the prospects of (bio)engineered biochar for enhancing HMs/PAHs co-remediation efficacy by reducing their mobility and bioavailability. The adsorption effectiveness of a biochar largely depends on the type of biomass material, carbonisation method and pyrolysis conditions. Biochar induced soil immobilise and remove metal ions via various mechanisms including electrostatic attractions, ion exchange, complexation and precipitation. PAHs remediation mechanisms are achieved via pore filling, hydrophobic effect, electrostatic attraction, hydrogen bond and partitioning. During last decade, biochar engineering (modification) via biological and chemical approaches to enhance contaminant removal efficiency has garnered greater interests. Hence, the development and application of (bio)engineered biochars in risk management, contaminant management associated with HM/PAH co-contaminated soil. In terms of (bio)engineered biochar, we review the prospects of amalgamating biochar with hydrogel, digestate and bioaugmentation to produce biochar composites.
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Affiliation(s)
- Jerry Anae
- School of Water, Energy and Environment, Cranfield University, Cranfield, MK43 0AL, UK
| | - Nafees Ahmad
- School of Water, Energy and Environment, Cranfield University, Cranfield, MK43 0AL, UK; Environmental Research Laboratory, Department of Chemistry, Aligarh Muslim University, Aligarh 202002, India
| | - Vinod Kumar
- School of Water, Energy and Environment, Cranfield University, Cranfield, MK43 0AL, UK
| | - Vijay Kumar Thakur
- Biorefining and Advanced Materials Research Centre, Scotland's Rural College, Edinburgh, EH9 3JG, UK
| | - Tony Gutierrez
- Institute of Mechanical, Process and Energy Engineering (IMPEE), School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh, EH14 4AS, UK
| | - Xiao Jin Yang
- State Key Laboratory of Chemical Resource Engineering, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China; State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China
| | - Chao Cai
- Key Lab of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China
| | - Zhugen Yang
- School of Water, Energy and Environment, Cranfield University, Cranfield, MK43 0AL, UK
| | - Frederic Coulon
- School of Water, Energy and Environment, Cranfield University, Cranfield, MK43 0AL, UK.
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Assil Z, Esegbue O, Mašek O, Gutierrez T, Free A. Specific enrichment of hydrocarbonclastic bacteria from diesel-amended soil on biochar particles. Sci Total Environ 2021; 762:143084. [PMID: 33131874 DOI: 10.1016/j.scitotenv.2020.143084] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/20/2020] [Revised: 10/12/2020] [Accepted: 10/12/2020] [Indexed: 06/11/2023]
Abstract
Biochar has been proposed as a suitable biostimulant for the remediation of hydrocarbon contamination, and also has the potential to act as a carrier for hydrocarbonoclastic microorganisms which could bioaugment endogenous microbial communities. However, the evidence regarding the biostimulatory effects of biochars on hydrocarbon bioremediation is somewhat equivocal, possibly due to variability of the physicochemical properties of biochar and soil across studies. Here, we use standard biochars with defined properties produced from softwood pellets (SWP) and rice husk (RH) at pyrolysis temperatures of 550 °C or 700 °C to test the effects of biochar amendment on microbial community composition and hydrocarbon degradation in soil microcosms contaminated with diesel oil. Combining this approach for the first time with specific analysis of microbial community composition using amplicon sequence variants (ASVs), we find that oil contamination causes extreme short-term loss of soil microbial diversity, and highly-specific selection of a limited set of genera defined by 13 ASVs. Biochar ameliorates the short-term loss of diversity, and in the longer term (9 weeks), changes community composition in a type-specific manner. The majority of the 13 selected ASVs are further enriched on biochar particles, although SWP biochars perform better than RH biochar in enrichment of putative hydrocarbonoclastic Aquabacterium spp. However, complete degradation of normal (n) alkanes from the aliphatic hydrocarbon fraction is prevented in the presence of biochar amendment, possibly due to their adsorption onto the char surface. Furthermore, we show that putative hydrocarbon degraders released from diesel-amended soil can subsequently be enriched to high levels on SWP biochar particles in growth medium supplemented with diesel oil as the sole carbon source; these include selected ASVs representing the genera Rhodococcus, Aquabacterium, and Cavicella. This work suggests that use of biochar pre-enriched with endogenous, conditionally-rare hydrocarbon degrading bacteria is a promising strategy for bioaugmentation of diesel-contaminated soils.
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Affiliation(s)
- Zhansaya Assil
- School of Biological Sciences, University of Edinburgh, Edinburgh EH9 3FF, UK
| | | | - Ondřej Mašek
- UK Biochar Research Centre, School of GeoSciences, University of Edinburgh, Edinburgh EH9 3FF, UK
| | - Tony Gutierrez
- School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, UK
| | - Andrew Free
- School of Biological Sciences, University of Edinburgh, Edinburgh EH9 3FF, UK.
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Voulgaridou GP, Mantso T, Anestopoulos I, Klavaris A, Katzastra C, Kiousi DE, Mantela M, Galanis A, Gardikis K, Banat IM, Gutierrez T, Sałek K, Euston S, Panayiotidis MI, Pappa A. Toxicity Profiling of Biosurfactants Produced by Novel Marine Bacterial Strains. Int J Mol Sci 2021; 22:2383. [PMID: 33673549 PMCID: PMC7956851 DOI: 10.3390/ijms22052383] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2021] [Revised: 02/23/2021] [Accepted: 02/23/2021] [Indexed: 11/21/2022] Open
Abstract
Surface active agents (SAAs), currently used in modern industry, are synthetic chemicals produced from non-renewable sources, with potential toxic impacts on humans and the environment. Thus, there is an increased interest for the identification and utilization of natural derived SAAs. As such, the marine environment is considered a promising source of biosurfactants with low toxicity, environmental compatibility, and biodegradation compared to their synthetic counterparts. MARISURF is a Horizon 2020 EU-funded project aiming to identify and functionally characterize SAAs, derived from a unique marine bacterial collection, towards commercial exploitation. Specifically, rhamnolipids produced by Marinobacter MCTG107b and Pseudomonas MCTG214(3b1) strains were previously identified and characterized while currently their toxicity profile was assessed by utilizing well-established methodologies. Our results showed a lack of cytotoxicity in in vitro models of human skin and liver as indicated by alamar blue and propidium iodide assays. Additionally, the use of the single gel electrophoresis assay, under oxidative stress conditions, revealed absence of any significant mutagenic/anti-mutagenic potential. Finally, both 2,2'-azino-bis (3-ethylbenzothiazoline-6-sulphonicacid) (ABTS) and 2,2-diphenyl-1-picrylhydrazyl radical (DPPH) cell-free assays, revealed no significant anti-oxidant capacity for neither of the tested compounds. Consequently, the absence of significant cytotoxicity and/or mutagenicity justifies their commercial exploitation and potential development into industrial end-user applications as natural and environmentally friendly biosurfactants.
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Affiliation(s)
- Georgia-Persephoni Voulgaridou
- Department of Molecular Biology & Genetics, Democritus University of Thrace, 68100 Alexandroupolis, Greece; (G.-P.V.); (I.A.); (A.K.); (C.K.); (D.-E.K.); (M.M.); (A.G.)
| | - Theodora Mantso
- Department of Applied Sciences, Northumbria University, Newcastle Upon Tyne NE1 8ST, UK;
| | - Ioannis Anestopoulos
- Department of Molecular Biology & Genetics, Democritus University of Thrace, 68100 Alexandroupolis, Greece; (G.-P.V.); (I.A.); (A.K.); (C.K.); (D.-E.K.); (M.M.); (A.G.)
| | - Ariel Klavaris
- Department of Molecular Biology & Genetics, Democritus University of Thrace, 68100 Alexandroupolis, Greece; (G.-P.V.); (I.A.); (A.K.); (C.K.); (D.-E.K.); (M.M.); (A.G.)
| | - Christina Katzastra
- Department of Molecular Biology & Genetics, Democritus University of Thrace, 68100 Alexandroupolis, Greece; (G.-P.V.); (I.A.); (A.K.); (C.K.); (D.-E.K.); (M.M.); (A.G.)
| | - Despoina-Eugenia Kiousi
- Department of Molecular Biology & Genetics, Democritus University of Thrace, 68100 Alexandroupolis, Greece; (G.-P.V.); (I.A.); (A.K.); (C.K.); (D.-E.K.); (M.M.); (A.G.)
| | - Marini Mantela
- Department of Molecular Biology & Genetics, Democritus University of Thrace, 68100 Alexandroupolis, Greece; (G.-P.V.); (I.A.); (A.K.); (C.K.); (D.-E.K.); (M.M.); (A.G.)
| | - Alex Galanis
- Department of Molecular Biology & Genetics, Democritus University of Thrace, 68100 Alexandroupolis, Greece; (G.-P.V.); (I.A.); (A.K.); (C.K.); (D.-E.K.); (M.M.); (A.G.)
| | - Konstantinos Gardikis
- Research and Development Department, APIVITA SA, Industrial Park Markopoulo Mesogaias, 19003 Athens, Greece;
| | - Ibrahim M. Banat
- Pharmaceutical Science Research Group, Biomedical Science Research Institute, Ulster University, Coleraine, Northern Ireland BT52 1SA, UK;
| | - Tony Gutierrez
- Institute of Mechanical, Process & Energy Engineering, School of Engineering & Physical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, UK;
| | - Karina Sałek
- Institute of Biological Chemistry, Biophysics & Bioengineering, School of Engineering & Physical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, UK; (K.S.); (S.E.)
| | - Stephen Euston
- Institute of Biological Chemistry, Biophysics & Bioengineering, School of Engineering & Physical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, UK; (K.S.); (S.E.)
| | - Mihalis I. Panayiotidis
- Department of Applied Sciences, Northumbria University, Newcastle Upon Tyne NE1 8ST, UK;
- The Cyprus Institute of Neurology and Genetics, Department of Cancer Genetics, Therapeutics and Ultrastructural Pathology, Nicosia 2371, Cyprus
- The Cyprus School of Molecular Medicine, The Cyprus Institute of Neurology and Genetics, PO Box 23462, Nicosia 1683, Cyprus
| | - Aglaia Pappa
- Department of Molecular Biology & Genetics, Democritus University of Thrace, 68100 Alexandroupolis, Greece; (G.-P.V.); (I.A.); (A.K.); (C.K.); (D.-E.K.); (M.M.); (A.G.)
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Nikolova C, Gutierrez T. Biosurfactants and Their Applications in the Oil and Gas Industry: Current State of Knowledge and Future Perspectives. Front Bioeng Biotechnol 2021; 9:626639. [PMID: 33659240 PMCID: PMC7917263 DOI: 10.3389/fbioe.2021.626639] [Citation(s) in RCA: 33] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2020] [Accepted: 01/13/2021] [Indexed: 11/13/2022] Open
Abstract
Surfactants are a group of amphiphilic chemical compounds (i.e., having both hydrophobic and hydrophilic domains) that form an indispensable component in almost every sector of modern industry. Their significance is evidenced from the enormous volumes that are used and wide diversity of applications they are used in, ranging from food and beverage, agriculture, public health, healthcare/medicine, textiles, and bioremediation. A major drive in recent decades has been toward the discovery of surfactants from biological/natural sources-namely bio-surfactants-as most surfactants that are used today for industrial applications are synthetically-manufactured via organo-chemical synthesis using petrochemicals as precursors. This is problematic, not only because they are derived from non-renewable resources, but also because of their environmental incompatibility and potential toxicological effects to humans and other organisms. This is timely as one of today's key challenges is to reduce our reliance on fossil fuels (oil, coal, gas) and to move toward using renewable and sustainable sources. Considering the enormous genetic diversity that microorganisms possess, they offer considerable promise in producing novel types of biosurfactants for replacing those that are produced from organo-chemical synthesis, and the marine environment offers enormous potential in this respect. In this review, we begin with an overview of the different types of microbial-produced biosurfactants and their applications. The remainder of this review discusses the current state of knowledge and trends in the usage of biosurfactants by the Oil and Gas industry for enhancing oil recovery from exhausted oil fields and as dispersants for combatting oil spills.
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Affiliation(s)
| | - Tony Gutierrez
- School of Engineering and Physical Sciences, Institute of Mechanical, Process and Energy Engineering, Heriot-Watt University, Edinburgh, United Kingdom
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19
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Mohsenpour SF, Hennige S, Willoughby N, Adeloye A, Gutierrez T. Integrating micro-algae into wastewater treatment: A review. Sci Total Environ 2021; 752:142168. [PMID: 33207512 DOI: 10.1016/j.scitotenv.2020.142168] [Citation(s) in RCA: 186] [Impact Index Per Article: 62.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2020] [Revised: 08/31/2020] [Accepted: 09/01/2020] [Indexed: 05/05/2023]
Abstract
Improving the ecological status of water sources is a growing focus for many developed and developing nations, in particular with reducing nitrogen and phosphorus in wastewater effluent. In recent years, mixotrophic micro-algae have received increased interest in implementing them as part of wastewater treatment. This is based on their ability to utilise organic and inorganic carbon, as well as inorganic nitrogen (N) and phosphorous (P) in wastewater for their growth, with the desired results of a reduction in the concentration of these substances in the water. The aim of this review is to provide a critical account of micro-algae as an important step in wastewater treatment for enhancing the reduction of N, P and the chemical oxygen demand (COD) in wastewater, whilst utilising a fraction of the energy demand of conventional biological treatment systems. Here, we begin with an overview of the various steps in the treatment process, followed by a review of the cellular and metabolic mechanisms that micro-algae use to reduce N, P and COD of wastewater with identification of when the process may potentially be most effective. We also describe the various abiotic and biotic factors influencing micro-algae wastewater treatment, together with a review of bioreactor configuration and design. Furthermore, a detailed overview is provided of the current state-of-the-art in the use of micro-algae in wastewater treatment.
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Affiliation(s)
- Seyedeh Fatemeh Mohsenpour
- Institute of Biological Chemistry, Biophysics and Bioengineering, School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, UK
| | - Sebastian Hennige
- School of Geosciences, The King's Buildings, University of Edinburgh, Edinburgh EH9 3FE, UK
| | - Nicholas Willoughby
- Institute of Biological Chemistry, Biophysics and Bioengineering, School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, UK
| | - Adebayo Adeloye
- Institute for Infrastructure and Environment, School of Energy, Geoscience, Infrastructure and Society, Heriot-Watt University, Edinburgh, EH14 4AS, UK
| | - Tony Gutierrez
- Institute of Mechanical, Process and Energy Engineering, School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, UK.
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20
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Thompson HF, Summers S, Yuecel R, Gutierrez T. Hydrocarbon-Degrading Bacteria Found Tightly Associated with the 50-70 μm Cell-Size Population of Eukaryotic Phytoplankton in Surface Waters of a Northeast Atlantic Region. Microorganisms 2020; 8:microorganisms8121955. [PMID: 33317100 PMCID: PMC7763645 DOI: 10.3390/microorganisms8121955] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2020] [Revised: 11/30/2020] [Accepted: 12/03/2020] [Indexed: 11/17/2022] Open
Abstract
The surface of marine eukaryotic phytoplankton can harbour communities of hydrocarbon-degrading bacteria; however, this algal–bacterial association has, hitherto, been only examined with non-axenic laboratory cultures of micro-algae. In this study, we isolated an operationally-defined community of phytoplankton, of cell size 50–70 μm, from a natural community in sea surface waters of a subarctic region in the northeast Atlantic. Using MiSeq 16S rRNA sequencing, we identified several recognized (Alcanivorax, Marinobacter, Oleispira, Porticoccus, Thalassospira) and putative hydrocarbon degraders (Colwelliaceae, Vibrionaceae) tightly associated with the phytoplankton population. We combined fluorescence in situ hybridisation with flow-cytometry (FISH-Flow) to examine the association of Marinobacter with this natural eukaryotic phytoplankton population. About 1.5% of the phytoplankton population contained tightly associated Marinobacter. The remaining Marinobacter population were loosely associated with either eukaryotic phytoplankton cells or non-chlorophyll particulate material. This work is the first to show the presence of obligate, generalist and putative hydrocarbonoclastic bacteria associated with natural populations of eukaryotic phytoplankton directly from sea surface water samples. It also highlights the suitability of FISH-Flow for future studies to examine the spatial and temporal structure and dynamics of these and other algal–bacterial associations in natural seawater samples.
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Affiliation(s)
- Haydn Frank Thompson
- Institute of Mechanical, Process and Energy Engineering (IMPEE), School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, UK; (H.F.T.); (S.S.)
| | - Stephen Summers
- Institute of Mechanical, Process and Energy Engineering (IMPEE), School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, UK; (H.F.T.); (S.S.)
- The Singapore Centre for Environmental Life Sciences Engineering, Nanyang Technological University, Singapore 637551, Singapore
| | - Raif Yuecel
- Iain Fraser Cytometry Centre, Institute of Medical Sciences IMS, University of Aberdeen, Aberdeen AB25 2ZD, UK;
- Exeter Centre for Cytomics (EXCC), College of Life and Environmental Sciences, University of Exeter, Exeter, EX4 4QD, UK
| | - Tony Gutierrez
- Institute of Mechanical, Process and Energy Engineering (IMPEE), School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, UK; (H.F.T.); (S.S.)
- Correspondence:
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21
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Sanjuan E, Pancorbo O, Santana K, Miñarro O, Sala V, Muchada M, Boned S, Juega JM, Pagola J, García-Tornel Á, Requena M, Rodríguez-Villatoro N, Rodríguez-Luna D, Deck M, Ribo M, Molina CA, Meler P, Romero V, Dalmases G, Rodríguez-Samaniego MT, Calleja L, Gutierrez T, Peña L, Gallego JC, Lorenzo E, Gonzalez Y, Moreno R, Rubiera M. Management of acute stroke. Specific nursing care and treatments in the stroke unit. Neurologia 2020; 38:S0213-4853(20)30291-7. [PMID: 33153769 DOI: 10.1016/j.nrl.2020.07.025] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2020] [Revised: 07/23/2020] [Accepted: 07/29/2020] [Indexed: 01/04/2023] Open
Abstract
OBJECTIVE This study provides a series of updated, evidence-based recommendations for the management of acute stroke. We aim to lay a foundation for the development of individual centres' internal protocols, serving as a reference for nursing care. METHODS We review the available evidence on acute stroke care. The most recent national and international guidelines were consulted. Levels of evidence and degrees of recommendation are based on the Oxford Centre for Evidence-Based Medicine classification. RESULTS The study describes prehospital acute stroke care, the operation of the code stroke protocol, care provided by the stroke team upon the patient's arrival at hospital, reperfusion treatments and their limitations, admission to the stroke unit, nursing care in the stroke unit, and discharge from hospital. CONCLUSIONS These guidelines provide general, evidence-based recommendations to guide professionals who care for patients with acute stroke. However, limited data are available on some aspects, showing the need for continued research on acute stroke management.
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Affiliation(s)
- E Sanjuan
- Unidad de Ictus, Servicio de Neurología, Vall d'Hebron Hospital Universitari, Vall d'Hebron Barcelona Hospital Campus, Barcelona, España.
| | - O Pancorbo
- Unidad de Ictus, Servicio de Neurología, Vall d'Hebron Hospital Universitari, Vall d'Hebron Barcelona Hospital Campus, Barcelona, España; Departament de Medicina, Universitat Autònoma de Barcelona, Barcelona, España
| | - K Santana
- Unidad de Ictus, Servicio de Neurología, Vall d'Hebron Hospital Universitari, Vall d'Hebron Barcelona Hospital Campus, Barcelona, España
| | - O Miñarro
- Unidad de Ictus, Servicio de Neurología, Vall d'Hebron Hospital Universitari, Vall d'Hebron Barcelona Hospital Campus, Barcelona, España
| | - V Sala
- Unidad de Ictus, Servicio de Neurología, Vall d'Hebron Hospital Universitari, Vall d'Hebron Barcelona Hospital Campus, Barcelona, España
| | - M Muchada
- Unidad de Ictus, Servicio de Neurología, Vall d'Hebron Hospital Universitari, Vall d'Hebron Barcelona Hospital Campus, Barcelona, España
| | - S Boned
- Unidad de Ictus, Servicio de Neurología, Vall d'Hebron Hospital Universitari, Vall d'Hebron Barcelona Hospital Campus, Barcelona, España
| | - J M Juega
- Unidad de Ictus, Servicio de Neurología, Vall d'Hebron Hospital Universitari, Vall d'Hebron Barcelona Hospital Campus, Barcelona, España
| | - J Pagola
- Unidad de Ictus, Servicio de Neurología, Vall d'Hebron Hospital Universitari, Vall d'Hebron Barcelona Hospital Campus, Barcelona, España
| | - Á García-Tornel
- Unidad de Ictus, Servicio de Neurología, Vall d'Hebron Hospital Universitari, Vall d'Hebron Barcelona Hospital Campus, Barcelona, España
| | - M Requena
- Unidad de Ictus, Servicio de Neurología, Vall d'Hebron Hospital Universitari, Vall d'Hebron Barcelona Hospital Campus, Barcelona, España
| | - N Rodríguez-Villatoro
- Unidad de Ictus, Servicio de Neurología, Vall d'Hebron Hospital Universitari, Vall d'Hebron Barcelona Hospital Campus, Barcelona, España
| | - D Rodríguez-Luna
- Unidad de Ictus, Servicio de Neurología, Vall d'Hebron Hospital Universitari, Vall d'Hebron Barcelona Hospital Campus, Barcelona, España
| | - M Deck
- Unidad de Ictus, Servicio de Neurología, Vall d'Hebron Hospital Universitari, Vall d'Hebron Barcelona Hospital Campus, Barcelona, España
| | - M Ribo
- Unidad de Ictus, Servicio de Neurología, Vall d'Hebron Hospital Universitari, Vall d'Hebron Barcelona Hospital Campus, Barcelona, España
| | - C A Molina
- Unidad de Ictus, Servicio de Neurología, Vall d'Hebron Hospital Universitari, Vall d'Hebron Barcelona Hospital Campus, Barcelona, España
| | - P Meler
- Unidad de Ictus, Servicio de Neurología, Vall d'Hebron Hospital Universitari, Vall d'Hebron Barcelona Hospital Campus, Barcelona, España
| | - V Romero
- Unidad de Ictus, Servicio de Neurología, Vall d'Hebron Hospital Universitari, Vall d'Hebron Barcelona Hospital Campus, Barcelona, España
| | - G Dalmases
- Unidad de Ictus, Servicio de Neurología, Vall d'Hebron Hospital Universitari, Vall d'Hebron Barcelona Hospital Campus, Barcelona, España
| | - M T Rodríguez-Samaniego
- Unidad de Ictus, Servicio de Neurología, Vall d'Hebron Hospital Universitari, Vall d'Hebron Barcelona Hospital Campus, Barcelona, España
| | - L Calleja
- Unidad de Ictus, Servicio de Neurología, Vall d'Hebron Hospital Universitari, Vall d'Hebron Barcelona Hospital Campus, Barcelona, España
| | - T Gutierrez
- Unidad de Ictus, Servicio de Neurología, Vall d'Hebron Hospital Universitari, Vall d'Hebron Barcelona Hospital Campus, Barcelona, España
| | - L Peña
- Unidad de Ictus, Servicio de Neurología, Vall d'Hebron Hospital Universitari, Vall d'Hebron Barcelona Hospital Campus, Barcelona, España
| | - J C Gallego
- Unidad de Ictus, Servicio de Neurología, Vall d'Hebron Hospital Universitari, Vall d'Hebron Barcelona Hospital Campus, Barcelona, España
| | - E Lorenzo
- Unidad de Ictus, Servicio de Neurología, Vall d'Hebron Hospital Universitari, Vall d'Hebron Barcelona Hospital Campus, Barcelona, España
| | - Y Gonzalez
- Unidad de Ictus, Servicio de Neurología, Vall d'Hebron Hospital Universitari, Vall d'Hebron Barcelona Hospital Campus, Barcelona, España
| | - R Moreno
- Unidad de Ictus, Servicio de Neurología, Vall d'Hebron Hospital Universitari, Vall d'Hebron Barcelona Hospital Campus, Barcelona, España
| | - M Rubiera
- Unidad de Ictus, Servicio de Neurología, Vall d'Hebron Hospital Universitari, Vall d'Hebron Barcelona Hospital Campus, Barcelona, España
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Nikolova C, Gutierrez T. Use of Microorganisms in the Recovery of Oil From Recalcitrant Oil Reservoirs: Current State of Knowledge, Technological Advances and Future Perspectives. Front Microbiol 2020; 10:2996. [PMID: 32010082 PMCID: PMC6978736 DOI: 10.3389/fmicb.2019.02996] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2019] [Accepted: 12/11/2019] [Indexed: 11/26/2022] Open
Abstract
The depletion of oil resources, increasing global energy demand, the current low, yet unpredictable, price of oil, and increasing maturity of major oil fields has driven the need for the development of oil recovery technologies that are less costly and, where possible, environmentally compatible. Using current technologies, between 20 and 40% of the original oil in a reservoir can be extracted by conventional production operations (e.g., vertical drilling), with secondary recovery methods yielding a further 15-25%. Hence, up to 55% of the original oil can remain unrecovered in a reservoir. Enhanced oil recovery (EOR) is a tertiary recovery process that involves application of different thermal, chemical, and microbial processes to recover an additional 7-15% of the original oil in place (OOIP) at an economically feasible production rate from poor-performing and depleted oil wells. EOR can significantly impact oil production, as increase in the recovery rate of oil by even a small margin could bring significant revenues without developing unconventional resources. Microbial enhanced oil recovery (MEOR) is an attractive, alternative oil recovery approach, which is claimed to potentially recover up to 50% of residual oil. The in situ production of biological surface-active compounds (e.g., biosurfactants) during the MEOR process does not require vast energy inputs and are not affected by global crude oil prices. Compared to other EOR methods, MEOR can be an economically and more environmentally friendly alternative. In this review, the current state of knowledge of MEOR, with insights from discussions with the industry and other stakeholders, is presented and in addition to the future outlook for this technology.
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Affiliation(s)
| | - Tony Gutierrez
- Institute of Mechanical, Process and Energy Engineering, School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh, United Kingdom
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Gutierrez T, Morris G, Ellis D, Mulloy B, Aitken MD. Production and characterisation of a marine Halomonas surface-active exopolymer. Appl Microbiol Biotechnol 2019; 104:1063-1076. [PMID: 31813048 PMCID: PMC6962145 DOI: 10.1007/s00253-019-10270-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2019] [Revised: 11/13/2019] [Accepted: 11/22/2019] [Indexed: 11/26/2022]
Abstract
During screening for novel emulsifiers and surfactants, a marine gammaproteobacterium, Halomonas sp. MCTG39a, was isolated and selected for its production of an extracellular emulsifying agent, P39a. This polymer was produced by the new isolate during growth in a modified Zobell’s 2216 medium amended with 1% glucose, and was extractable by cold ethanol precipitation. Chemical, chromatographic and nuclear magnetic resonance spectroscopic analysis confirmed P39a to be a high-molecular-weight (~ 261,000 g/mol) glycoprotein composed of carbohydrate (17.2%) and protein (36.4%). The polymer exhibited high emulsifying activities against a range of oil substrates that included straight-chain aliphatics, mono- and alkyl- aromatics and cycloparaffins. In general, higher emulsification values were measured under low (0.1 M PBS) compared to high (synthetic seawater) ionic strength conditions, indicating that low ionic strength is more favourable for emulsification by the P39a polymer. However, as observed with other bacterial emulsifying agents, the polymer emulsified some aromatic hydrocarbon species, as well as refined and crude oils, more effectively under high ionic strength conditions, which we posit could be due to steric adsorption to these substrates as may be conferred by the protein fraction of the polymer. Furthermore, the polymer effected a positive influence on the degradation of phenanthrene by other marine bacteria, such as the specialist PAH-degrader Polycyclovorans algicola. Collectively, based on the ability of this Halomonas high-molecular-weight glycoprotein to emulsify a range of pure hydrocarbon species, as well as refined and crude oils, it shows promise for the bioremediation of contaminated sites.
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Affiliation(s)
- Tony Gutierrez
- Institute of Mechanical, Process and Energy Engineering (IMPEE), School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh, UK. .,Department of Environmental Sciences and Engineering, Gillings School of Global Public Health,, University of North Carolina, Chapel Hill, NC, USA.
| | - Gordon Morris
- Department of Chemical Sciences, School of Applied Sciences, University of Huddersfield, Huddersfield, UK
| | - Dave Ellis
- Institute of Chemical Sciences (ICS), School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh, UK
| | - Barbara Mulloy
- Institute of Pharmaceutical Science, King's College London, London, UK
| | - Michael D Aitken
- Department of Environmental Sciences and Engineering, Gillings School of Global Public Health,, University of North Carolina, Chapel Hill, NC, USA
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Tripathi L, Twigg MS, Zompra A, Salek K, Irorere VU, Gutierrez T, Spyroulias GA, Marchant R, Banat IM. Biosynthesis of rhamnolipid by a Marinobacter species expands the paradigm of biosurfactant synthesis to a new genus of the marine microflora. Microb Cell Fact 2019; 18:164. [PMID: 31597569 PMCID: PMC6785906 DOI: 10.1186/s12934-019-1216-8] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2019] [Accepted: 09/24/2019] [Indexed: 01/17/2023] Open
Abstract
BACKGROUND In comparison to synthetically derived surfactants, biosurfactants produced from microbial culture are generally regarded by industry as being more sustainable and possess lower toxicity. One major class of biosurfactants are rhamnolipids primarily produced by Pseudomonas aeruginosa. Due to its pathogenicity rhamnolipid synthesis by this species is viewed as being commercially nonviable, as such there is a significant focus to identify alternative producers of rhamnolipids. RESULTS To achieve this, we phenotypically screened marine bacteria for biosurfactant production resulting in the identification of rhamnolipid biosynthesis in a species belonging to the Marinobacter genus. Preliminary screening showed the strain to reduce surface tension of cell-free supernatant to 31.0 mN m-1. A full-factorial design was carried out to assess the effects of pH and sea salt concentration for optimising biosurfactant production. When cultured in optimised media Marinobacter sp. MCTG107b produced 740 ± 28.3 mg L-1 of biosurfactant after 96 h of growth. Characterisation of this biosurfactant using both HPLC-MS and tandem MS showed it to be a mixture of different rhamnolipids, with di-rhamnolipid, Rha-Rha-C10-C10 being the most predominant congener. The strain exhibited no pathogenicity when tested using the Galleria mellonella infection model. CONCLUSIONS This study expands the paradigm of rhamnolipid biosynthesis to a new genus of bacterium from the marine environment. Rhamnolipids produced from Marinobacter have prospects for industrial application due to their potential to be synthesised from cheap, renewable feed stocks and significantly reduced pathogenicity compared to P. aeruginosa strains.
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Affiliation(s)
- Lakshmi Tripathi
- School of Biomedical Sciences, Ulster University, Coleraine, BT521SA, Northern Ireland, UK.
| | - Matthew S Twigg
- School of Biomedical Sciences, Ulster University, Coleraine, BT521SA, Northern Ireland, UK
| | | | - Karina Salek
- Institute of Mechanical, Process & Energy Engineering, School of Engineering & Physical Sciences, Heriot-Watt University, Edinburgh, EH14 4AS, UK
| | - Victor U Irorere
- School of Biomedical Sciences, Ulster University, Coleraine, BT521SA, Northern Ireland, UK
| | - Tony Gutierrez
- Institute of Mechanical, Process & Energy Engineering, School of Engineering & Physical Sciences, Heriot-Watt University, Edinburgh, EH14 4AS, UK
| | | | - Roger Marchant
- School of Biomedical Sciences, Ulster University, Coleraine, BT521SA, Northern Ireland, UK
| | - Ibrahim M Banat
- School of Biomedical Sciences, Ulster University, Coleraine, BT521SA, Northern Ireland, UK
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Suja LD, Chen X, Summers S, Paterson DM, Gutierrez T. Chemical Dispersant Enhances Microbial Exopolymer (EPS) Production and Formation of Marine Oil/Dispersant Snow in Surface Waters of the Subarctic Northeast Atlantic. Front Microbiol 2019; 10:553. [PMID: 30949150 PMCID: PMC6435573 DOI: 10.3389/fmicb.2019.00553] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2018] [Accepted: 03/04/2019] [Indexed: 12/18/2022] Open
Abstract
A notable feature of the Deepwater Horizon oil spill was the unprecedented formation of marine oil snow (MOS) that was observed in large quantities floating on the sea surface and that subsequently sedimented to the seafloor. Whilst the physical and chemical processes involved in MOS formation remain unclear, some studies have shown that extracellular polymeric substances (EPS) play a role in this process. Here, we report that during exposure of subarctic northeast Atlantic seawater to a chemical dispersant, whether in the presence/absence of crude oil, the dispersant stimulates the production of significant quantities of EPS that we posit serves as a key building block in the formation of MOS. This response is likely conferred via de novo synthesis of EPS by natural communities of bacteria. We also describe the formation of marine dispersant snow (MDS) as a product of adding chemical dispersants to seawater. Differential staining confirmed that MDS, like MOS, is composed of glycoprotein, though MDS is more protein rich. Using barcoded-amplicon Illumina MiSeq sequencing, we analyzed, for the first time, the bacterial communities associated with MDS and report that their diversity is not significantly dissimilar to those associated with MOS aggregates. Our findings emphasize the need to conduct further work on the effects of dispersants when applied to oil spills at sea, particularly at different sites, and to determine how the product of this (i.e., MOS and MDS) affects the biodegradation of the oil.
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Affiliation(s)
- Laura Duran Suja
- School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh, United Kingdom
| | - Xindi Chen
- School of Biology, Scottish Oceans Institute, University of St Andrews, St Andrews, United Kingdom.,College of Harbour, Coastal and Offshore Engineering, Hohai University, Nanjing, China
| | - Stephen Summers
- Singapore Centre for Environmental Life Sciences Engineering, Nanyang Technological University, Singapore, Singapore
| | - David M Paterson
- School of Biology, Scottish Oceans Institute, University of St Andrews, St Andrews, United Kingdom
| | - Tony Gutierrez
- School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh, United Kingdom
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Twigg M, Tripathi L, Zompra K, Salek K, Irorere V, Gutierrez T, Spyroulias G, Marchant R, Banat I. Surfactants from the sea: rhamnolipid production by marine bacteria. Access Microbiol 2019. [DOI: 10.1099/acmi.ac2019.po0066] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Affiliation(s)
| | | | | | - Karina Salek
- 3Heriot-Watt University, Edinburgh, United Kingdom
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Molina L, Salek K, Picart P, Euston S, Gutierrez T, Guillen M, Caudepon D. Lab scale fermentation studies with marine bacteria to maximize the production of bioemulsifiers for cosmetic and food industries. N Biotechnol 2018. [DOI: 10.1016/j.nbt.2018.05.1244] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Gutierrez T, Morris G, Ellis D, Bowler B, Jones M, Salek K, Mulloy B, Teske A. Hydrocarbon-degradation and MOS-formation capabilities of the dominant bacteria enriched in sea surface oil slicks during the Deepwater Horizon oil spill. Mar Pollut Bull 2018; 135:205-215. [PMID: 30301032 DOI: 10.1016/j.marpolbul.2018.07.027] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/2018] [Revised: 07/05/2018] [Accepted: 07/08/2018] [Indexed: 06/08/2023]
Abstract
A distinctive feature of the Deepwater Horizon (DwH) oil spill was the formation of significant quantities of marine oil snow (MOS), for which the mechanism(s) underlying its formation remain unresolved. Here, we show that Alteromonas strain TK-46(2), Pseudoalteromonas strain TK-105 and Cycloclasticus TK-8 - organisms that became enriched in sea surface oil slicks during the spill - contributed to the formation of MOS and/or dispersion of the oil. In roller-bottle incubations, Alteromonas cells and their produced EPS yielded MOS, whereas Pseudoalteromonas and Cycloclasticus did not. Interestingly, the Cycloclasticus strain was able to degrade n-alkanes concomitantly with aromatics within the complex oil mixture, which is atypical for members of this genus. Our findings, for the first time, provide direct evidence on the hydrocarbon-degrading capabilities for these bacteria enriched during the DwH spill, and that bacterial cells of certain species and their produced EPS played a direct role in MOS formation.
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Affiliation(s)
- Tony Gutierrez
- Institute of Mechanical, Process and Energy Engineering (IMPEE), School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh, UK.
| | - Gordon Morris
- Department of Chemical Sciences, School of Applied Sciences, University of Huddersfield, Huddersfield, UK
| | - Dave Ellis
- Institute of Chemical Sciences (ICS), School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh, UK
| | - Bernard Bowler
- School of Civil Engineering and Geosciences, Newcastle University, Newcastle upon Tyne, UK
| | - Martin Jones
- School of Civil Engineering and Geosciences, Newcastle University, Newcastle upon Tyne, UK
| | - Karina Salek
- Institute of Mechanical, Process and Energy Engineering (IMPEE), School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh, UK
| | - Barbara Mulloy
- Laboratory for Molecular Structure, National Institute for Biological Standards and Control (NIBSC), Hertfordshire, UK
| | - Andreas Teske
- Department of Marine Sciences, University of North Carolina, Chapel Hill, NC, USA
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Thompson HF, Lesaulnier C, Pelikan C, Gutierrez T. Visualisation of the obligate hydrocarbonoclastic bacteria Polycyclovorans algicola and Algiphilus aromaticivorans in co-cultures with micro-algae by CARD-FISH. J Microbiol Methods 2018; 152:73-79. [DOI: 10.1016/j.mimet.2018.07.016] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2018] [Revised: 07/26/2018] [Accepted: 07/27/2018] [Indexed: 12/28/2022]
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Gutierrez T, Teske A, Ziervogel K, Passow U, Quigg A. Editorial: Microbial Exopolymers: Sources, Chemico-Physiological Properties, and Ecosystem Effects in the Marine Environment. Front Microbiol 2018; 9:1822. [PMID: 30135683 PMCID: PMC6092484 DOI: 10.3389/fmicb.2018.01822] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2018] [Accepted: 07/20/2018] [Indexed: 11/13/2022] Open
Affiliation(s)
- Tony Gutierrez
- School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh, United Kingdom
| | - Andreas Teske
- UNC Marine Sciences, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States
| | - Kai Ziervogel
- Institute for the Study of Earth, Oceans, and Space, University of New Hampshire, Durham, NH, United States
| | - Uta Passow
- Marine Science Institute, University of California, Santa Barbara, Santa Barbara, CA, United States.,Ocean Sciences, Memorial University of Newfoundland, St. John's, NL, Canada
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Dutra EH, O'Brien MH, Gutierrez T, Lima A, Nanda R, Yadav S. PTH [1-34]-induced alterations predispose the mandibular condylar cartilage to mineralization. Orthod Craniofac Res 2018. [PMID: 28643904 DOI: 10.1111/ocr.12157] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
OBJECTIVE To study the effects of intermittent parathyroid hormone (PTH [1-34]) on the mandibular condylar cartilage (MCC) and subchondral bone in adult female mice. MATERIALS AND METHODS Twenty-two, 20-week-old female mice were used for in vivo experiments. The experimental mice (n=11) received daily intraperitoneal injections of PTH [1-34] for 3 weeks, while control mice (n=11) received intraperitoneal injections of 0.9% saline solution. Mice were euthanized and then micro-computed tomography (micro-CT); histology and immunostaining were carried out to assess the response. RESULTS Intermittent PTH [1-34] led to early MCC breakdown and surface irregularities. Micro-CT analyses indicated that PTH [1-34] treatment led to increased bone volume fraction, tissue density and trabecular thickness, while decreasing the trabecular spacing. Histological analyses showed decreased proteoglycan secretion, increased bone turnover (TRAP staining) and increased mineralization. Furthermore, PTH [1-34] treatment showed increased apoptosis of the cells. Our immunohistochemistry showed increased expression of pSMAD158 in the MCC and subchondral bone with PTH administration, whereas sclerostin (SOST) expression was decreased. CONCLUSIONS Intermittent PTH [1-34] results in early mineralization of the MCC, which may result in cartilage degeneration. Our results identified a novel mechanism by which PTH [1-34] induces alteration in the microarchitecture of the MCC and the subchondral bone.
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Affiliation(s)
- E H Dutra
- Division of Orthodontics, University of Connecticut Health Center, Farmington, CT, USA
| | - M H O'Brien
- Division of Orthodontics, University of Connecticut Health Center, Farmington, CT, USA
| | - T Gutierrez
- School of Dental Medicine, University of Connecticut Health Center, Farmington, CT, USA
| | - A Lima
- Division of Orthodontics, University of Connecticut Health Center, Farmington, CT, USA
| | - R Nanda
- Division of Orthodontics, University of Connecticut Health Center, Farmington, CT, USA
| | - S Yadav
- Division of Orthodontics, University of Connecticut Health Center, Farmington, CT, USA
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Summers S, Henry T, Gutierrez T. Agglomeration of nano- and microplastic particles in seawater by autochthonous and de novo-produced sources of exopolymeric substances. Mar Pollut Bull 2018; 130:258-267. [PMID: 29866555 DOI: 10.1016/j.marpolbul.2018.03.039] [Citation(s) in RCA: 82] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2018] [Revised: 03/20/2018] [Accepted: 03/24/2018] [Indexed: 05/22/2023]
Abstract
Microplastics (<5 mm) have often been studied under in-vitro conditions where plastics have been investigated in isolation. However, in the natural environment microplastics readily form agglomerates conferring the particles with properties different to their pristine counterparts. Here, we examined the interaction of exopolymers with polystyrene nanoplastics and microplastics. Formation of plastic agglomerates was examined using simulated sea surface conditions. Flow cytometry coupled with microscopy revealed that nano- and microplastic particle spheres form agglomerates in seawater with a mucilagenous material and an associated microbial community. To characterise this material, differential staining methods revealed it to be glycoprotein in composition. Exposing increasing concentrations of a marine bacterial glycoprotein EPS to nano- or microplastics revealed that these types of polymers contribute to the formation and abundance of plastic agglomerates. This work highlights the importance of EPS on the fate of plastic and future research should take this into account when evaluating the impact of plastics.
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Affiliation(s)
- Stephen Summers
- School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, United Kingdom; The Singapore Centre for Environmental Life Sciences Engineering and the School of Biological Sciences, Nanyang Technological University, Singapore 637551, Singapore
| | - Theodore Henry
- School of Energy, Geoscience, Infrastructure and Society, Heriot-Watt University, Edinburgh EH14 4AS, United Kingdom; Department of Forestry Wildlife and Fisheries, Center for Environmental Biotechnology, The University of Tennessee, Knoxville, TN 36849, USA
| | - Tony Gutierrez
- School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, United Kingdom.
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Gallego A, O'Hara Murray R, Berx B, Turrell WR, Beegle-Krause CJ, Inall M, Sherwin T, Siddorn J, Wakelin S, Vlasenko V, Hole LR, Dagestad KF, Rees J, Short L, Rønningen P, Main CE, Legrand S, Gutierrez T, Witte U, Mulanaphy N. Current status of deepwater oil spill modelling in the Faroe-Shetland Channel, Northeast Atlantic, and future challenges. Mar Pollut Bull 2018; 127:484-504. [PMID: 29475689 DOI: 10.1016/j.marpolbul.2017.12.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/25/2017] [Revised: 11/30/2017] [Accepted: 12/01/2017] [Indexed: 05/20/2023]
Abstract
As oil reserves in established basins become depleted, exploration and production moves towards relatively unexploited areas, such as deep waters off the continental shelf. The Faroe-Shetland Channel (FSC, NE Atlantic) and adjacent areas have been subject to increased focus by the oil industry. In addition to extreme depths, metocean conditions in this region characterise an environment with high waves and strong winds, strong currents, complex circulation patterns, sharp density gradients, and large small- and mesoscale variability. These conditions pose operational challenges to oil spill response and question the suitability of current oil spill modelling frameworks (oil spill models and their forcing data) to adequately simulate the behaviour of a potential oil spill in the area. This article reviews the state of knowledge relevant to deepwater oil spill modelling for the FSC area and identifies knowledge gaps and research priorities. Our analysis should be relevant to other areas of complex oceanography.
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Affiliation(s)
| | | | | | | | | | - Mark Inall
- Scottish Association for Marine Science, UK
| | | | | | | | | | | | | | - John Rees
- Centre for Environment Fisheries and Aquaculture Science, UK
| | | | | | - Charlotte E Main
- National Oceanography Centre, Southampton, UK; University of Southampton, UK
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Bankhead-Kendall B, Gutierrez T, Murry J, Holland D, Agrawal V, Almahmoud K, Pearcy C, Truitt MS. Antibiotics and open fractures of the lower extremity: less is more. Eur J Trauma Emerg Surg 2017; 45:125-129. [DOI: 10.1007/s00068-017-0847-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2016] [Accepted: 09/25/2017] [Indexed: 10/18/2022]
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Fossier Marchan L, Lee Chang KJ, Nichols PD, Mitchell WJ, Polglase JL, Gutierrez T. Taxonomy, ecology and biotechnological applications of thraustochytrids: A review. Biotechnol Adv 2017; 36:26-46. [PMID: 28911809 DOI: 10.1016/j.biotechadv.2017.09.003] [Citation(s) in RCA: 86] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2017] [Revised: 08/19/2017] [Accepted: 09/06/2017] [Indexed: 12/24/2022]
Abstract
Thraustochytrids were first discovered in 1934, and since the 1960's they have been increasingly studied for their beneficial and deleterious effects. This review aims to provide an enhanced understanding of these protists with a particular emphasis on their taxonomy, ecology and biotechnology applications. Over the years, thraustochytrid taxonomy has improved with the development of modern molecular techniques and new biochemical markers, resulting in the isolation and description of new strains. In the present work, the taxonomic history of thraustochytrids is reviewed, while providing an up-to-date classification of these organisms. It also describes the various biomarkers that may be taken into consideration to support taxonomic characterization of the thraustochytrids, together with a review of traditional and modern techniques for their isolation and molecular identification. The originality of this review lies in linking taxonomy and ecology of the thraustochytrids and their biotechnological applications as producers of docosahexaenoic acid (DHA), carotenoids, exopolysaccharides and other compounds of interest. The paper provides a summary of these aspects while also highlighting some of the most important recent studies in this field, which include the diversity of polyunsaturated fatty acid metabolism in thraustochytrids, some novel strategies for biomass production and recovery of compounds of interest. Furthermore, a detailed overview is provided of the direct and current applications of thraustochytrid-derived compounds in the food, fuel, cosmetic, pharmaceutical, and aquaculture industries and of some of the commercial products available. This review is intended to be a source of information and references on the thraustochytrids for both experts and those who are new to this field.
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Affiliation(s)
- Loris Fossier Marchan
- Institute of Mechanical, Process & Energy Engineering, School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, UK.
| | - Kim J Lee Chang
- CSIRO Oceans and Atmosphere, GPO Box 1538, Hobart, TAS, 7001, Australia.
| | - Peter D Nichols
- CSIRO Oceans and Atmosphere, GPO Box 1538, Hobart, TAS, 7001, Australia.
| | - Wilfrid J Mitchell
- Institute of Biological Chemistry, Biophysics and Bioengineering, School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, UK.
| | - Jane L Polglase
- Jane L Polglase Institute of Life and Earth Sciences, School of Energy, Geoscience, Infrastructure and Society, Heriot-Watt University, Edinburgh EH14 4AS, UK.
| | - Tony Gutierrez
- Institute of Mechanical, Process & Energy Engineering, School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, UK.
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Thompson H, Angelova A, Bowler B, Jones M, Gutierrez T. Enhanced crude oil biodegradative potential of natural phytoplankton-associated hydrocarbonoclastic bacteria. Environ Microbiol 2017; 19:2843-2861. [DOI: 10.1111/1462-2920.13811] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2017] [Revised: 05/22/2017] [Accepted: 05/30/2017] [Indexed: 11/26/2022]
Affiliation(s)
- Haydn Thompson
- School of Engineering and Physical Sciences; Heriot-Watt University; Edinburgh UK
| | - Angelina Angelova
- School of Engineering and Physical Sciences; Heriot-Watt University; Edinburgh UK
| | - Bernard Bowler
- School of Civil Engineering and Geosciences; University of Newcastle; Newcastle Upon Tyne UK
| | - Martin Jones
- School of Civil Engineering and Geosciences; University of Newcastle; Newcastle Upon Tyne UK
| | - Tony Gutierrez
- School of Engineering and Physical Sciences; Heriot-Watt University; Edinburgh UK
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Evans L, Hennige SJ, Willoughby N, Adeloye AJ, Skroblin M, Gutierrez T. Effect of organic carbon enrichment on the treatment efficiency of primary settled wastewater by Chlorella vulgaris. ALGAL RES 2017. [DOI: 10.1016/j.algal.2017.04.011] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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Abstract
Microbial cells (i.e., bacteria, archaea, microeukaryotes) in oceans secrete a diverse array of large molecules, collectively called extracellular polymeric substances (EPSs) or simply exopolymers. These secretions facilitate attachment to surfaces that lead to the formation of structured 'biofilm' communities. In open-water environments, they also lead to formation of organic colloids, and larger aggregations of cells, called 'marine snow.' Secretion of EPS is now recognized as a fundamental microbial adaptation, occurring under many environmental conditions, and one that influences many ocean processes. This relatively recent realization has revolutionized our understanding of microbial impacts on ocean systems. EPS occur in a range of molecular sizes, conformations and physical/chemical properties, and polysaccharides, proteins, lipids, and even nucleic acids are actively secreted components. Interestingly, however, the physical ultrastructure of how individual EPS interact with each other is poorly understood. Together, the EPS matrix molecules form a three-dimensional architecture from which cells may localize extracellular activities and conduct cooperative/antagonistic interactions that cannot be accomplished efficiently by free-living cells. EPS alter optical signatures of sediments and seawater, and are involved in biogeomineral precipitation and the construction of microbial macrostructures, and horizontal-transfers of genetic information. In the water-column, they contribute to the formation of marine snow, transparent exopolymer particles (TEPs), sea-surface microlayer biofilm, and marine oil snow. Excessive production of EPS occurs during later-stages of phytoplankton blooms as an excess metabolic by product and releases a carbon pool that transitions among dissolved-, colloidal-, and gel-states. Some EPS are highly labile carbon forms, while other forms appear quite refractory to degradation. Emerging studies suggest that EPS contribute to efficient trophic-transfer of environmental contaminants, and may provide a protective refugia for pathogenic cells within marine systems; one that enhances their survival/persistence. Finally, these secretions are prominent in 'extreme' environments ranging from sea-ice communities to hypersaline systems to the high-temperatures/pressures of hydrothermal-vent systems. This overview summarizes some of the roles of exopolymer in oceans.
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Affiliation(s)
- Alan W. Decho
- Department of Environmental Health Sciences, Arnold School of Public Health, University of South Carolina, ColumbiaSC, United States
| | - Tony Gutierrez
- School of Engineering and Physical Sciences, Heriot-Watt UniversityEdinburgh, United Kingdom
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Berry D, Gutierrez T. Evaluating the Detection of Hydrocarbon-Degrading Bacteria in 16S rRNA Gene Sequencing Surveys. Front Microbiol 2017; 8:896. [PMID: 28567035 PMCID: PMC5434106 DOI: 10.3389/fmicb.2017.00896] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2017] [Accepted: 05/03/2017] [Indexed: 11/21/2022] Open
Abstract
Hydrocarbonoclastic bacteria (HCB) play a key role in the biodegradation of oil hydrocarbons in marine and other environments. A small number of taxa have been identified as obligate HCB, notably the Gammaproteobacterial genera Alcanivorax, Cycloclasticus, Marinobacter, Neptumonas, Oleiphilus, Oleispira, and Thalassolituus, as well as the Alphaproteobacterial genus Thalassospira. Detection of HCB in amplicon-based sequencing surveys relies on high coverage by PCR primers and accurate taxonomic classification. In this study, we performed a phylogenetic analysis to identify 16S rRNA gene sequence regions that represent the breadth of sequence diversity within these taxa. Using validated sequences, we evaluated 449 universal 16S rRNA gene-targeted bacterial PCR primer pairs for their coverage of these taxa. The results of this analysis provide a practical framework for selection of suitable primer sets for optimal detection of HCB in sequencing surveys.
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Affiliation(s)
- David Berry
- Division of Microbial Ecology, Department of Microbiology and Ecosystem Science, Research Network Chemistry Meets Microbiology, University of ViennaVienna, Austria
| | - Tony Gutierrez
- School of Engineering and Physical Sciences, Heriot-Watt UniversityEdinburgh, United Kingdom
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Suja LD, Summers S, Gutierrez T. Role of EPS, Dispersant and Nutrients on the Microbial Response and MOS Formation in the Subarctic Northeast Atlantic. Front Microbiol 2017; 8:676. [PMID: 28484435 PMCID: PMC5399796 DOI: 10.3389/fmicb.2017.00676] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2016] [Accepted: 04/03/2017] [Indexed: 11/17/2022] Open
Abstract
In this study we report the formation of marine oil snow (MOS), its associated microbial community, the factors influencing its formation, and the microbial response to crude oil in surface waters of the Faroe-Shetland Channel (FSC). The FSC is a subarctic region that is hydrodynamically complex located in the northeast Atlantic where oil extraction is currently occurring and where exploration is likely to expand into its deeper waters (>500 m). A major oil spill in this region may mirror the aftermath that ensued following the Deepwater Horizon (DWH) blowout in the Gulf of Mexico, where the massive influx of Macondo crude oil triggered the formation of copious quantities of rapidly sinking MOS and successional blooms of opportunistic oil-degrading bacteria. In laboratory experiments, we simulated environmental conditions in sea surface waters of the FSC using water collected from this site during the winter of 2015. We demonstrated that the presence of dispersant triggers the formation of MOS, and that nutrient amendments magnify this. Illumina MiSeq sequencing revealed the enrichment on MOS of associated oil-degrading (Cycloclasticus, Thalassolituus, Marinobacter) and EPS-producing (Halomonas, Pseudoalteromonas, Alteromonas) bacteria, and included major representation by Psychrobacter and Cobetia with putative oil-degrading/EPS-producing qualities. The formation of marine snow, in the absence of crude oil and dispersant, in seawater amended with nutrients alone indicated that the de novo synthesis of bacterial EPS is a key factor in MOS formation, and the glycoprotein composition of the MOS aggregates confirmed that its amorphous biopolymeric matrix was of microbial (likely bacterial) origin. The presence of dispersants and crude oil with/without nutrients resulted in distinct microbial responses marked by intermittent, and in some cases short-lived, blooms of opportunistic heterotrophs, principally obligate hydrocarbonoclastic (Alcanivorax, Cycloclasticus, Thalassolituus, Marinobacter) and EPS-producing (Halomonas, Alteromonas, Pseudoalteromonas) bacteria. Interestingly, members of the Vibrionales (principally the genus Vibrio) were strongly enriched by crude oil (with/without dispersant or nutrients), highlighting a putative importance for these organisms in crude oil biodegradation in the FSC. Our findings mirror those observed at DWH and hence underscore their broad relevance.
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Affiliation(s)
- Laura Duran Suja
- Institute of Mechanical, Process and Energy Engineering, School of Engineering and Physical Sciences, Heriot-Watt UniversityEdinburgh, UK
| | - Stephen Summers
- Institute of Mechanical, Process and Energy Engineering, School of Engineering and Physical Sciences, Heriot-Watt UniversityEdinburgh, UK
| | - Tony Gutierrez
- Institute of Mechanical, Process and Energy Engineering, School of Engineering and Physical Sciences, Heriot-Watt UniversityEdinburgh, UK
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Marchan LF, Lee Chang KJ, Nichols PD, Polglase JL, Mitchell WJ, Gutierrez T. Screening of new British thraustochytrids isolates for docosahexaenoic acid (DHA) production. J Appl Phycol 2017; 29:2831-2843. [PMID: 29213183 PMCID: PMC5705750 DOI: 10.1007/s10811-017-1149-8] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/04/2016] [Revised: 04/16/2017] [Accepted: 04/17/2017] [Indexed: 05/12/2023]
Abstract
Thraustochytrids isolated from hot tropical and sub-tropical waters have been well studied for DHA and biodiesel production in the last decades. However, little research has been performed on the oils of cold water thraustochytrids, in particular from the North Sea region. In this study, thraustochytrid strains from British waters showed high relative levels of omega-3 long-chain (≥C20) polyunsaturated fatty acids (LC-PUFA), including docosahexaenoic acid (DHA, 22:6ω3). The relative levels of DHA (as % of total fatty acids, TFA) in the different British strains are hitherto amongst the highest recorded from any thraustochytrid screening study, with strain TL18 reaching up to 67% DHA in modified Glucose-Yeast Extract-Peptone (GYP) medium. At this screening stage, low final biomass and fatty acid yield were observed in modified GYP and MarChiquita-Brain Heart Broth (MCBHB), while PUFA profiles (as % of PUFA) remained unaltered regardless of the culture medium used. Hence, optimizing the medium and culture conditions to improve growth and lipid content, without impacting the relative percentage of DHA, has the potential to increase the final DHA concentration. With this in mind, three strains were identified as promising organisms for the production of DHA. In the context of possible future industrial exploitation involving a winterization step, we investigated the recycling of the residual oil for biodiesel use. To do this, a mathematical model was used to assess the intrinsic properties of the by-product oil. The results showed the feasibility of producing primary DHA-rich oil, assuming optimized conditions, while using the by-product oil for biodiesel use.
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Affiliation(s)
- Loris Fossier Marchan
- Institute of Mechanical, Process & Energy Engineering, School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh, EH14 4AS UK
| | - Kim J. Lee Chang
- CSIRO Oceans and Atmosphere, GPO Box 1538, Hobart, TAS 7001 Australia
| | - Peter D. Nichols
- CSIRO Oceans and Atmosphere, GPO Box 1538, Hobart, TAS 7001 Australia
| | - Jane L. Polglase
- Institute of Life and Earth Sciences, School of Energy, Geoscience, Infrastructure and Society, Heriot-Watt University, Edinburgh, EH14 4AS UK
| | - Wilfrid J. Mitchell
- Institute of Biological Chemistry, Biophysics and Bioengineering, School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh, EH14 4AS UK
| | - Tony Gutierrez
- Institute of Mechanical, Process & Energy Engineering, School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh, EH14 4AS UK
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Gutierrez T, Berry D, Teske A, Aitken MD. Enrichment of Fusobacteria in Sea Surface Oil Slicks from the Deepwater Horizon Oil Spill. Microorganisms 2016; 4:E24. [PMID: 27681918 PMCID: PMC5039584 DOI: 10.3390/microorganisms4030024] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2016] [Revised: 07/14/2016] [Accepted: 07/20/2016] [Indexed: 11/25/2022] Open
Abstract
The Deepwater Horizon (DWH) oil spill led to rapid microbial community shifts in the Gulf of Mexico, including the formation of unprecedented quantities of marine oil snow (MOS) and of a massive subsurface oil plume. The major taxa that bloomed in sea surface oil slicks during the spill included Cycloclasticus, and to a lesser extent Halomonas, Alteromonas, and Pseudoalteromonas-organisms that grow and degrade oil hydrocarbons aerobically. Here, we show that sea surface oil slicks at DWH contained obligate and facultative anaerobic taxa, including members of the obligate anaerobic phylum Fusobacteria that are commonly found in marine sediment environments. Pyrosequencing analysis revealed that Fusobacteria were strongly selected for when sea surface oil slicks were allowed to develop anaerobically. These organisms have been found in oil-contaminated sediments in the Gulf of Mexico, in deep marine oil reservoirs, and other oil-contaminated sites, suggesting they have putative hydrocarbon-degrading qualities. The occurrence and strong selection for Fusobacteria in a lab-based incubation of a sea surface oil slick sample collected during the spill suggests that these organisms may have become enriched in anaerobic zones of suspended particulates, such as MOS. Whilst the formation and rapid sinking of MOS is recognised as an important mechanism by which a proportion of the Macondo oil had been transported to the sea floor, its role in potentially transporting microorganisms, including oil-degraders, from the upper reaches of the water column to the seafloor should be considered. The presence of Fusobacteria on the sea surface-a highly oxygenated environment-is intriguing, and may be explained by the vertical upsurge of oil that provided a carrier to transport these organisms from anaerobic/micro-aerophilic zones in the oil plume or seabed to the upper reaches of the water column. We also propose that the formation of rapidly-sinking MOS may have re-transported these, and other microbial taxa, to the sediment in the Gulf of Mexico.
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Affiliation(s)
- Tony Gutierrez
- School of Life Sciences, Heriot Watt University, Edinburgh, EH14 4AS, UK.
- Department of Environmental Sciences and Engineering, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA.
| | - David Berry
- Department of Microbiology and Ecosystem Science, Division of Microbial Ecology, University of Vienna, A-1090 Vienna, Austria.
| | - Andreas Teske
- Department of Marine Sciences, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA.
| | - Michael D Aitken
- Department of Environmental Sciences and Engineering, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA.
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Keswani A, Oliver DM, Gutierrez T, Quilliam RS. Microbial hitchhikers on marine plastic debris: Human exposure risks at bathing waters and beach environments. Mar Environ Res 2016; 118:10-9. [PMID: 27128352 DOI: 10.1016/j.marenvres.2016.04.006] [Citation(s) in RCA: 172] [Impact Index Per Article: 21.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/13/2016] [Revised: 04/06/2016] [Accepted: 04/10/2016] [Indexed: 05/20/2023]
Abstract
Marine plastic debris is well characterized in terms of its ability to negatively impact terrestrial and marine environments, endanger coastal wildlife, and interfere with navigation, tourism and commercial fisheries. However, the impacts of potentially harmful microorganisms and pathogens colonising plastic litter are not well understood. The hard surface of plastics provides an ideal environment for opportunistic microbial colonisers to form biofilms and might offer a protective niche capable of supporting a diversity of different microorganisms, known as the "Plastisphere". This biotope could act as an important vector for the persistence and spread of pathogens, faecal indicator organisms (FIOs) and harmful algal bloom species (HABs) across beach and bathing environments. This review will focus on the existent knowledge and research gaps, and identify the possible consequences of plastic-associated microbes on human health, the spread of infectious diseases and bathing water quality.
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Affiliation(s)
- Anisha Keswani
- Biological and Environmental Sciences, School of Natural Sciences, University of Stirling, Stirling, FK9 4LA, UK.
| | - David M Oliver
- Biological and Environmental Sciences, School of Natural Sciences, University of Stirling, Stirling, FK9 4LA, UK
| | - Tony Gutierrez
- School of Life Sciences, Herriot Watt University, Edinburgh, EH14 4AS, UK
| | - Richard S Quilliam
- Biological and Environmental Sciences, School of Natural Sciences, University of Stirling, Stirling, FK9 4LA, UK
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Evans L, Hennige S, Gutierrez T, Adeloye AJ, Willoughby N. Effect of organic carbon enrichment on the treatment efficiency of primary settled wastewater by Chlorella vulgaris. N Biotechnol 2016. [DOI: 10.1016/j.nbt.2016.06.919] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Dombrowski N, Donaho JA, Gutierrez T, Seitz KW, Teske AP, Baker BJ. Reconstructing metabolic pathways of hydrocarbon-degrading bacteria from the Deepwater Horizon oil spill. Nat Microbiol 2016; 1:16057. [DOI: 10.1038/nmicrobiol.2016.57] [Citation(s) in RCA: 124] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2015] [Accepted: 03/29/2016] [Indexed: 01/25/2023]
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Mishamandani S, Gutierrez T, Berry D, Aitken MD. Response of the bacterial community associated with a cosmopolitan marine diatom to crude oil shows a preference for the biodegradation of aromatic hydrocarbons. Environ Microbiol 2015; 18:1817-33. [PMID: 26184578 DOI: 10.1111/1462-2920.12988] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2015] [Revised: 07/14/2015] [Accepted: 07/14/2015] [Indexed: 01/22/2023]
Abstract
Emerging evidence shows that hydrocarbonoclastic bacteria (HCB) may be commonly found associated with phytoplankton in the ocean, but the ecology of these bacteria and how they respond to crude oil remains poorly understood. Here, we used a natural diatom-bacterial assemblage to investigate the diversity and response of HCB associated with a cosmopolitan marine diatom, Skeletonema costatum, to crude oil. Pyrosequencing analysis and qPCR revealed a dramatic transition in the diatom-associated bacterial community, defined initially by a short-lived bloom of Methylophaga (putative oil degraders) that was subsequently succeeded by distinct groups of HCB (Marinobacter, Polycyclovorans, Arenibacter, Parvibaculum, Roseobacter clade), including putative novel phyla, as well as other groups with previously unqualified oil-degrading potential. Interestingly, these oil-enriched organisms contributed to the apparent and exclusive biodegradation of substituted and non-substituted polycyclic aromatic hydrocarbons (PAHs), thereby suggesting that the HCB community associated with the diatom is tuned to specializing in the degradation of PAHs. Furthermore, the formation of marine oil snow (MOS) in oil-amended incubations was consistent with its formation during the Deepwater Horizon oil spill. This work highlights the phycosphere of phytoplankton as an underexplored biotope in the ocean where HCB may contribute importantly to the biodegradation of hydrocarbon contaminants in marine surface waters.
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Affiliation(s)
- Sara Mishamandani
- Department of Environmental Sciences and Engineering, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, NC, USA
| | - Tony Gutierrez
- Department of Environmental Sciences and Engineering, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, NC, USA.,School of Life Sciences, Heriot-Watt University, Edinburgh, UK
| | - David Berry
- Division of Microbial Ecology, Department of Microbiology and Ecosystems Science, Faculty of Life Sciences, University of Vienna, Vienna, Austria
| | - Michael D Aitken
- Department of Environmental Sciences and Engineering, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, NC, USA
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Gutierrez T, Biddle JF, Teske A, Aitken MD. Cultivation-dependent and cultivation-independent characterization of hydrocarbon-degrading bacteria in Guaymas Basin sediments. Front Microbiol 2015. [PMID: 26217326 PMCID: PMC4493657 DOI: 10.3389/fmicb.2015.00695] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Marine hydrocarbon-degrading bacteria perform a fundamental role in the biodegradation of crude oil and its petrochemical derivatives in coastal and open ocean environments. However, there is a paucity of knowledge on the diversity and function of these organisms in deep-sea sediment. Here we used stable-isotope probing (SIP), a valuable tool to link the phylogeny and function of targeted microbial groups, to investigate polycyclic aromatic hydrocarbon (PAH)-degrading bacteria under aerobic conditions in sediments from Guaymas Basin with uniformly labeled [13C]-phenanthrene (PHE). The dominant sequences in clone libraries constructed from 13C-enriched bacterial DNA (from PHE enrichments) were identified to belong to the genus Cycloclasticus. We used quantitative PCR primers targeting the 16S rRNA gene of the SIP-identified Cycloclasticus to determine their abundance in sediment incubations amended with unlabeled PHE and showed substantial increases in gene abundance during the experiments. We also isolated a strain, BG-2, representing the SIP-identified Cycloclasticus sequence (99.9% 16S rRNA gene sequence identity), and used this strain to provide direct evidence of PHE degradation and mineralization. In addition, we isolated Halomonas, Thalassospira, and Lutibacterium sp. with demonstrable PHE-degrading capacity from Guaymas Basin sediment. This study demonstrates the value of coupling SIP with cultivation methods to identify and expand on the known diversity of PAH-degrading bacteria in the deep-sea.
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Affiliation(s)
- Tony Gutierrez
- Department of Environmental Sciences and Engineering, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, NC USA ; School of Life Sciences, Heriot-Watt University, Edinburgh UK
| | - Jennifer F Biddle
- College of Earth, Ocean, and Environment, University of Delaware, Lewes, DE USA
| | - Andreas Teske
- Department of Marine Sciences, University of North Carolina at Chapel Hill, Chapel Hill, NC USA
| | - Michael D Aitken
- Department of Environmental Sciences and Engineering, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, NC USA
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Gutierrez T, Aitken MD. Role of methylotrophs in the degradation of hydrocarbons during the Deepwater Horizon oil spill. ISME J 2014; 8:2543-5. [PMID: 24865772 DOI: 10.1038/ismej.2014.88] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/03/2014] [Accepted: 04/15/2014] [Indexed: 11/09/2022]
Abstract
The role of methylotrophic bacteria in the fate of the oil and gas released into the Gulf of Mexico during the Deepwater Horizon oil spill has been controversial, particularly in relation to whether organisms such as Methylophaga had contributed to the consumption of methane. Whereas methanotrophy remains unqualified in these organisms, recent work by our group using DNA-based stable-isotope probing coupled with cultivation-based methods has uncovered hydrocarbon-degrading Methylophaga. Recent findings have also shown that methylotrophs, including Methylophaga, were in a heightened state of metabolic activity within oil plume waters during the active phase of the spill. Taken collectively, these findings suggest that members of this group may have participated in the degradation of high-molecular-weight hydrocarbons in plume waters. The discovery of hydrocarbon-degrading Methylophaga also highlights the importance of considering these organisms in playing a role to the fate of oil hydrocarbons at oil-impacted sites.
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Affiliation(s)
- Tony Gutierrez
- 1] School of Life Sciences, Heriot-Watt University, Edinburgh, UK [2] Department of Environmental Sciences and Engineering, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, NC, USA
| | - Michael D Aitken
- Department of Environmental Sciences and Engineering, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, NC, USA
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Mishamandani S, Gutierrez T, Aitken MD. DNA-based stable isotope probing coupled with cultivation methods implicates Methylophaga in hydrocarbon degradation. Front Microbiol 2014; 5:76. [PMID: 24578702 PMCID: PMC3936186 DOI: 10.3389/fmicb.2014.00076] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2013] [Accepted: 02/11/2014] [Indexed: 11/13/2022] Open
Abstract
Marine hydrocarbon-degrading bacteria perform a fundamental role in the oxidation and ultimate removal of crude oil and its petrochemical derivatives in coastal and open ocean environments. Those with an almost exclusive ability to utilize hydrocarbons as a sole carbon and energy source have been found confined to just a few genera. Here we used stable isotope probing (SIP), a valuable tool to link the phylogeny and function of targeted microbial groups, to investigate hydrocarbon-degrading bacteria in coastal North Carolina sea water (Beaufort Inlet, USA) with uniformly labeled [(13)C]n-hexadecane. The dominant sequences in clone libraries constructed from (13)C-enriched bacterial DNA (from n-hexadecane enrichments) were identified to belong to the genus Alcanivorax, with ≤98% sequence identity to the closest type strain-thus representing a putative novel phylogenetic taxon within this genus. Unexpectedly, we also identified (13)C-enriched sequences in heavy DNA fractions that were affiliated to the genus Methylophaga. This is a contentious group since, though some of its members have been proposed to degrade hydrocarbons, substantive evidence has not previously confirmed this. We used quantitative PCR primers targeting the 16S rRNA gene of the SIP-identified Alcanivorax and Methylophaga to determine their abundance in incubations amended with unlabeled n-hexadecane. Both showed substantial increases in gene copy number during the experiments. Subsequently, we isolated a strain representing the SIP-identified Methylophaga sequences (99.9% 16S rRNA gene sequence identity) and used it to show, for the first time, direct evidence of hydrocarbon degradation by a cultured Methylophaga sp. This study demonstrates the value of coupling SIP with cultivation methods to identify and expand on the known diversity of hydrocarbon-degrading bacteria in the marine environment.
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Affiliation(s)
- Sara Mishamandani
- Department of Environmental Sciences and Engineering, Gillings School of Global Public Health, University of North Carolina Chapel Hill, NC, USA
| | - Tony Gutierrez
- Department of Environmental Sciences and Engineering, Gillings School of Global Public Health, University of North Carolina Chapel Hill, NC, USA ; Centre for Marine Biodiversity and Biotechnology, School of Life Sciences, Heriot-Watt University Edinburgh, UK
| | - Michael D Aitken
- Department of Environmental Sciences and Engineering, Gillings School of Global Public Health, University of North Carolina Chapel Hill, NC, USA
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