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Sun X, Wai OWH, Xie J, Li X. Biomineralization To Prevent Microbially Induced Corrosion on Concrete for Sustainable Marine Infrastructure. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2024; 58:522-533. [PMID: 38052449 PMCID: PMC10785763 DOI: 10.1021/acs.est.3c04680] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2023] [Revised: 11/05/2023] [Accepted: 11/10/2023] [Indexed: 12/07/2023]
Abstract
Microbially induced corrosion (MIC) on concrete represents a serious issue impairing the lifespan of coastal/marine infrastructure. However, currently developed concrete corrosion protection strategies have limitations in wide applications. Here, a biomineralization method was proposed to form a biomineralized film on concrete surfaces for corrosion inhibition. Laboratory seawater corrosion experiments were conducted under different conditions [e.g., chemical corrosion (CC), MIC, and biomineralization for corrosion inhibition]. A combination of chemical and mechanical property measurements of concrete (e.g., sulfate concentrations, permeability, mass, and strength) and a genotypic-based investigation of formed concrete biofilms was conducted to evaluate the effectiveness of the biomineralization approach on corrosion inhibition. The results show that MIC resulted in much higher corrosion rates than CC. However, the biomineralization treatment effectively inhibited corrosion because the biomineralized film decreased the total and relative abundance of sulfate-reducing bacteria (SRB) and acted as a protective layer to control the diffusion of sulfate and isolate the concrete from the corrosive SRB communities, which helps extend the lifespan of concrete structures. Moreover, this technique had no negative impact on the native marine microbial communities. Our study contributes to the potential application of biomineralization for corrosion inhibition to achieve long-term sustainability for major marine concrete structures.
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Affiliation(s)
- Xiaohao Sun
- Department
of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR, China
| | - Onyx W. H. Wai
- Department
of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR, China
- Research
Institute for Sustainable Urban Development, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, SAR, China
| | - Jiawen Xie
- Department
of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR, China
| | - Xiangdong Li
- Department
of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR, China
- Research
Institute for Sustainable Urban Development, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, SAR, China
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Naik AT, Kamensky KM, Hellum AM, Moisander PH. Disturbance frequency directs microbial community succession in marine biofilms exposed to shear. mSphere 2023; 8:e0024823. [PMID: 37931135 PMCID: PMC10790581 DOI: 10.1128/msphere.00248-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2023] [Accepted: 08/30/2023] [Indexed: 11/08/2023] Open
Abstract
IMPORTANCE Disturbances are major drivers of community succession in many microbial systems; however, relatively little is known about marine biofilm community succession, especially under antifouling disturbance. Antifouling technologies exert strong local disturbances on marine biofilms, and resulting biomass losses can be accompanied by shifts in biofilm community composition and succession. We address this gap in knowledge by bridging microbial ecology with antifouling technology development. We show that disturbance by shear can strongly alter marine biofilm community succession, acting as a selective filter influenced by frequency of exposure. Examining marine biofilm succession patterns with and without shear revealed stable associations between key prokaryotic and eukaryotic taxa, highlighting the importance of cross-domain assessment in future marine biofilm research. Describing how compounded top-down and bottom-up disturbances shape the succession of marine biofilms is valuable for understanding the assembly and stability of these complex microbial communities and predicting species invasiveness.
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Affiliation(s)
- Abhishek T. Naik
- Department of Biology, University of Massachusetts Dartmouth, North Dartmouth, Massachusetts, USA
- School of Marine Science and Technology, University of Massachusetts Dartmouth, New Bedford, Massachusetts, USA
| | | | - Aren M. Hellum
- Naval Undersea Warfare Center, Newport, Rhode Island, USA
| | - Pia H. Moisander
- Department of Biology, University of Massachusetts Dartmouth, North Dartmouth, Massachusetts, USA
- School of Marine Science and Technology, University of Massachusetts Dartmouth, New Bedford, Massachusetts, USA
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3
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Romeu MJ, Mergulhão F. Development of Antifouling Strategies for Marine Applications. Microorganisms 2023; 11:1568. [PMID: 37375070 DOI: 10.3390/microorganisms11061568] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2023] [Revised: 06/08/2023] [Accepted: 06/11/2023] [Indexed: 06/29/2023] Open
Abstract
Marine biofouling is an undeniable challenge for aquatic systems since it is responsible for several environmental and ecological problems and economic losses. Several strategies have been developed to mitigate fouling-related issues in marine environments, including developing marine coatings using nanotechnology and biomimetic models, and incorporating natural compounds, peptides, bacteriophages, or specific enzymes on surfaces. The advantages and limitations of these strategies are discussed in this review, and the development of novel surfaces and coatings is highlighted. The performance of these novel antibiofilm coatings is currently tested by in vitro experiments, which should try to mimic real conditions in the best way, and/or by in situ tests through the immersion of surfaces in marine environments. Both forms present their advantages and limitations, and these factors should be considered when the performance of a novel marine coating requires evaluation and validation. Despite all the advances and improvements against marine biofouling, progress toward an ideal operational strategy has been slow given the increasingly demanding regulatory requirements. Recent developments in self-polishing copolymers and fouling-release coatings have yielded promising results which set the basis for the development of more efficient and eco-friendly antifouling strategies.
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Affiliation(s)
- Maria João Romeu
- LEPABE-Laboratory for Process Engineering, Environment, Biotechnology and Energy, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
- ALiCE-Associate Laboratory in Chemical Engineering, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
| | - Filipe Mergulhão
- LEPABE-Laboratory for Process Engineering, Environment, Biotechnology and Energy, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
- ALiCE-Associate Laboratory in Chemical Engineering, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
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Kumar M, Kumar R, Chaudhary DR, Jha B. An appraisal of early stage biofilm-forming bacterial community assemblage and diversity in the Arabian Sea, India. MARINE POLLUTION BULLETIN 2022; 180:113732. [PMID: 35594757 DOI: 10.1016/j.marpolbul.2022.113732] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/19/2022] [Revised: 05/01/2022] [Accepted: 05/02/2022] [Indexed: 06/15/2023]
Abstract
The community composition and distribution of early-stage (24 h) biofilm-forming bacteria on two different surfaces (glass slide and polystyrene plastic slide) at three different locations (Diu, Alang and Sikka) were studied using a culture-dependent and next-generation sequencing (NGS) approach in the Arabian Sea, Gujarat, India. The most dominant phyla observed using the NGS approach were the Proteobacteria among the sampling sites. Gammaproteobacteria class dominated both the surfaces among the sites and accounted for 46.7% to 89.2% of total abundance. The culture-dependent analysis showed Proteobacteria and Firmicutes as the dominant phyla on the surfaces within the sampling sites. During the initial colonization, hydrocarbon-degrading bacterial strains have also attached to the surfaces. The outcome of this study would be of great importance for targeting the early stage biofilm-forming and hydrocarbon-degrading bacterial isolates may help to degrade plastic in the marine environment.
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Affiliation(s)
- Madhav Kumar
- CSIR - Central Salt and Marine Chemicals Research Institute, G. B. Bhavnagar, Gujarat 364 002, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad- 201002, India
| | - Raghawendra Kumar
- CSIR - Central Salt and Marine Chemicals Research Institute, G. B. Bhavnagar, Gujarat 364 002, India
| | - Doongar R Chaudhary
- CSIR - Central Salt and Marine Chemicals Research Institute, G. B. Bhavnagar, Gujarat 364 002, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad- 201002, India.
| | - Bhavanath Jha
- CSIR - Central Salt and Marine Chemicals Research Institute, G. B. Bhavnagar, Gujarat 364 002, India.
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Abstract
Marine biofilms are ubiquitous in the marine environment. These complex microbial communities rapidly respond to environmental changes and encompass hugely diverse microbial structures, functions and metabolisms. Nevertheless, knowledge is limited on the microbial community structures and functions of natural marine biofilms and their influence on global geochemical cycles. Microbial cues, including secondary metabolites and microbial structures, regulate interactions between microorganisms, with their environment and with other benthic organisms, which affects their community succession and metamorphosis. Furthermore, marine biofilms are key mediators of marine biofouling, which greatly affect marine industries. In this Review, we discuss marine biofilm dynamics, including their diversity, abundance and functions. We also highlight knowledge gaps, areas for future research and potential biotechnological applications of marine biofilms.
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Vivier B, Navon M, Dauvin JC, Chasselin L, Deloor M, Orvain F, Rusig AM, Mussio I, Boutouil M, Claquin P. Colonisation of artificial structures by primary producers: competition and photosynthetic behaviour. BIOFOULING 2022; 38:493-506. [PMID: 35707904 DOI: 10.1080/08927014.2022.2088285] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/05/2022] [Revised: 06/02/2022] [Accepted: 06/06/2022] [Indexed: 06/15/2023]
Abstract
Colonisation of artificial structures by primary producers is an important determinant for eco-engineering projects. In this context, interactions between the colonisation by microphytobenthic biofilm and macroalgae were explored on 48 samples of marine infrastructures (MI) immersed for one year in the English Channel. Marine infrastructures samples with smooth and rough surface were compared to evaluate the influence of surface micro-scale rugosity. Microphytobenthos biomass (MPB), macroalgal diversity and photosynthetic parameters of both were assessed during colonisation. No significant differences were found as a function of the surface rugosity of MI samples, which was unexpected, but can be explained by biogenic rugosity provided by barnacles. Marine infrastructures were largely colonised by a red encrusting alga, Phymatolithon purpureum, which showed poor photosynthetic capacity compared to the microphytobenthos present next to it. Colonisation by monospecific encrusting algae tended to reduce the primary productivity of hard substrate.
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Affiliation(s)
- Baptiste Vivier
- Normandie Université, Université de Caen Normandie, Caen, France
- Laboratoire Biologie des ORganismes et Ecosystèmes Aquatiques (BOREA, UMR CNRS 8067), Muséum National d'Histoire Naturelle, Sorbonne Université, Université de Caen Normandie, IRD 207, Université des Antilles. Centre de Recherches en Environnement Côtier (CREC) - Station Marine, BP49, Luc-sur-Mer, France
| | - Maxime Navon
- Normandie Université, Université de Caen Normandie, Caen, France
- Laboratoire Biologie des ORganismes et Ecosystèmes Aquatiques (BOREA, UMR CNRS 8067), Muséum National d'Histoire Naturelle, Sorbonne Université, Université de Caen Normandie, IRD 207, Université des Antilles. Centre de Recherches en Environnement Côtier (CREC) - Station Marine, BP49, Luc-sur-Mer, France
| | - Jean-Claude Dauvin
- Laboratoire Morphodynamique Continentale et Côtière, UMR CNRS 6143 M2C, Normandie Université, Université de Caen Normandie, UNIROUEN, Caen, France
| | - Léo Chasselin
- Normandie Université, Université de Caen Normandie, Caen, France
| | - Maël Deloor
- Normandie Université, Université de Caen Normandie, Caen, France
- Laboratoire Biologie des ORganismes et Ecosystèmes Aquatiques (BOREA, UMR CNRS 8067), Muséum National d'Histoire Naturelle, Sorbonne Université, Université de Caen Normandie, IRD 207, Université des Antilles. Centre de Recherches en Environnement Côtier (CREC) - Station Marine, BP49, Luc-sur-Mer, France
| | - Francis Orvain
- Normandie Université, Université de Caen Normandie, Caen, France
- Laboratoire Biologie des ORganismes et Ecosystèmes Aquatiques (BOREA, UMR CNRS 8067), Muséum National d'Histoire Naturelle, Sorbonne Université, Université de Caen Normandie, IRD 207, Université des Antilles. Centre de Recherches en Environnement Côtier (CREC) - Station Marine, BP49, Luc-sur-Mer, France
| | - Anne-Marie Rusig
- Normandie Université, Université de Caen Normandie, Caen, France
- Laboratoire Biologie des ORganismes et Ecosystèmes Aquatiques (BOREA, UMR CNRS 8067), Muséum National d'Histoire Naturelle, Sorbonne Université, Université de Caen Normandie, IRD 207, Université des Antilles. Centre de Recherches en Environnement Côtier (CREC) - Station Marine, BP49, Luc-sur-Mer, France
| | - Isabelle Mussio
- Normandie Université, Université de Caen Normandie, Caen, France
- Laboratoire Biologie des ORganismes et Ecosystèmes Aquatiques (BOREA, UMR CNRS 8067), Muséum National d'Histoire Naturelle, Sorbonne Université, Université de Caen Normandie, IRD 207, Université des Antilles. Centre de Recherches en Environnement Côtier (CREC) - Station Marine, BP49, Luc-sur-Mer, France
| | - Mohamed Boutouil
- Ecole Supérieure d'Ingénieurs des Travaux de la Construction de Caen (ESITC Caen), Epron, France
| | - Pascal Claquin
- Normandie Université, Université de Caen Normandie, Caen, France
- Laboratoire Biologie des ORganismes et Ecosystèmes Aquatiques (BOREA, UMR CNRS 8067), Muséum National d'Histoire Naturelle, Sorbonne Université, Université de Caen Normandie, IRD 207, Université des Antilles. Centre de Recherches en Environnement Côtier (CREC) - Station Marine, BP49, Luc-sur-Mer, France
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Impacts of UV-C irradiation on marine biofilm community succession. Appl Environ Microbiol 2021; 88:e0229821. [PMID: 34936837 DOI: 10.1128/aem.02298-21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Marine biofilms are diverse microbial communities and important ecological habitats forming on surfaces submerged in the ocean. Biofilm communities resist environmental disturbance, making them a nuisance to some human activities ('biofouling'). Anti-fouling solutions rarely address the underlying stability or compositional responses of these biofilms. Using bulk measurements and molecular analyses, we examined temporal and UV-C antifouling-based shifts in marine biofilms in the coastal Western North Atlantic Ocean during early fall. Over a 24-d period, bacterial communities shifted from early dominance of Gammaproteobacteria to increased proportions of Alphaproteobacteria, Bacteroidia and Acidimicrobiia. In a network analysis based on temporal covariance, Rhodobacteraceae (Alphaproteobacteria) nodes were abundant and densely connected with generally positive correlations. In the eukaryotic community, persistent algal, protistan, and invertebrate groups were observed, although consistent temporal succession was not detected. Biofilm UV-C treatment at 13 and 20 days resulted in losses of chlorophyll a and transparent exopolymer particles, indicating biomass disruption. Bacterial community shifts suggested that UV-C treatment decreased biofilm maturation rate and was associated with proportional shifts among diverse bacterial taxa. UV-C treatment was also associated with increased proportions of protists potentially involved in detritivory and parasitism. Older biofilm communities had increased resistance to UV-C, suggesting that early biofilms are more susceptible to UV-C based antifouling. The results suggest that UV-C irradiation is potentially an effective antifouling method in marine environments in terms of biomass removal and in slowing maturation. However, as they mature, biofilm communities may accumulate microbial members that are tolerant or resilient under UV-treatment. Importance Marine biofilms regulate processes from organic matter and pollutant turnover to eukaryotic settlement and growth. Biofilm growth and eukaryotic settlement interfering with human activities via growth on ship hulls, aquaculture operations, or other marine infrastructure are called 'biofouling'. There is a need to develop sustainable anti-fouling techniques by minimizing impacts to surrounding biota. We use the biofouling-antifouling framework to test hypotheses about marine biofilm succession and stability in response to disturbance, using a novel UV-C LED device. We demonstrate strong bacterial biofilm successional patterns and detect taxa potentially contributing to stability under UV-C stress. Despite UV-C-associated biomass losses and varying UV susceptibility of microbial taxa, we detected high compositional resistance among biofilm bacterial communities, suggesting decoupling of disruption in biomass and community composition following UV-C irradiation. We also report microbial covariance patterns over 24 days of biofilm growth, pointing to areas for study of microbial interactions and targeted antifouling.
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8
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Sushmitha TJ, Rajeev M, Sriyutha Murthy P, Ganesh S, Toleti SR, Karutha Pandian S. Bacterial community structure of early-stage biofilms is dictated by temporal succession rather than substrate types in the southern coastal seawater of India. PLoS One 2021; 16:e0257961. [PMID: 34570809 PMCID: PMC8476003 DOI: 10.1371/journal.pone.0257961] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2021] [Accepted: 09/15/2021] [Indexed: 01/04/2023] Open
Abstract
Bacterial communities colonized on submerged substrata are recognized as a key factor in the formation of complex biofouling phenomenon in the marine environment. Despite massive maritime activities and a large industrial sector in the nearshore of the Laccadive Sea, studies describing pioneer bacterial colonizers and community succession during the early-stage biofilm are scarce. We investigated the biofilm-forming bacterial community succession on three substrata viz. stainless steel, high-density polyethylene, and titanium over 15 days of immersion in the seawater intake area of a power plant, located in the southern coastal region of India. The bacterial community composition of biofilms and peripheral seawater were analyzed by Illumina MiSeq sequenced 16S rRNA gene amplicons. The obtained metataxonomic results indicated a profound influence of temporal succession over substrate type on the early-stage biofilm-forming microbiota. Bacterial communities showed vivid temporal dynamics that involved variations in abundant bacterial groups. The proportion of dominant phyla viz. Proteobacteria decreased over biofilm succession days, while Bacteroidetes increased, suggesting their role as initial and late colonizers, respectively. A rapid fluctuation in the proportion of two bacterial orders viz. Alteromonadales and Vibrionales were observed throughout the successional stages. LEfSe analysis identified specific bacterial groups at all stages of biofilm development, whereas no substrata type-specific groups were observed. Furthermore, the results of PCoA and UPGMA hierarchical clustering demonstrated that the biofilm-forming community varied considerably from the planktonic community. Phylum Proteobacteria preponderated the biofilm-forming community, while the Bacteroidetes, Cyanobacteria, and Actinobacteria dominated the planktonic community. Overall, our results refute the common assumption that substrate material has a decisive impact on biofilm formation; rather, it portrayed that the temporal succession overshadowed the influence of the substrate material. Our findings provide a scientific understanding of the factors shaping initial biofilm development in the marine environment and will help in designing efficient site-specific anti-biofouling strategies.
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Affiliation(s)
- T. J. Sushmitha
- Department of Biotechnology, Alagappa University, Karaikudi, Tamil Nadu, India
| | - Meora Rajeev
- Water and Steam Chemistry Division, Bhabha Atomic Research Centre Facilities, Kalpakkam, Tamil Nadu, India
| | - P. Sriyutha Murthy
- Water and Steam Chemistry Division, Bhabha Atomic Research Centre Facilities, Kalpakkam, Tamil Nadu, India
| | - S. Ganesh
- Department of Chemistry, Scott Christian College, Nagercoil, Tamil Nadu, India
| | - Subba Rao Toleti
- Water and Steam Chemistry Division, Bhabha Atomic Research Centre Facilities, Kalpakkam, Tamil Nadu, India
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9
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Vivier B, Claquin P, Lelong C, Lesage Q, Peccate M, Hamel B, Georges M, Bourguiba A, Sebaibi N, Boutouil M, Goux D, Dauvin JC, Orvain F. Influence of infrastructure material composition and microtopography on marine biofilm growth and photobiology. BIOFOULING 2021; 37:740-756. [PMID: 34396846 DOI: 10.1080/08927014.2021.1959918] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Revised: 07/19/2021] [Accepted: 07/19/2021] [Indexed: 06/13/2023]
Abstract
The impact of concrete composition and roughness on the formation of microalgal biofilms and their photobiology were studied on marine infrastructures presenting four different compositions combined with two degrees of roughness (rough and smooth). The structures were first inoculated with a natural microphytobenthic biofilm and immersed in sterilised seawater with a controlled photoperiod for six days. Photosynthetic activity was assessed with an imaging PAM-(Pulse Amplitude Modulated) fluorometer and microtopography was monitored in parallel with a 3-D camera. The results indicated that roughness had an impact on the biofilm biomass, its physiological status and its photosynthetic efficiency and capacity. The assessment of surface roughness indicated that negative reliefs were preferably colonised by MPB (microphytobenthic) cells with better photosynthetic performances. Moreover, MPB biofilms showed better photoacclimation in these microhabitats than on the positive and smooth reliefs. This study confirms the importance of microhabitat for biofilm formation and their photobiology.
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Affiliation(s)
- Baptiste Vivier
- Normandie Université, Université de Caen Normandie, Caen, France
- Laboratoire Biologie des ORganismes et Ecosystèmes Aquatiques (BOREA, UMR CNRS 8067), Muséum National d'Histoire Naturelle, Sorbonne Université, Université de Caen Normandie, IRD 207, Université des Antilles. Centre de Recherches en Environnement Côtier (CREC) - Station Marine, Caen, France
| | - Pascal Claquin
- Normandie Université, Université de Caen Normandie, Caen, France
- Laboratoire Biologie des ORganismes et Ecosystèmes Aquatiques (BOREA, UMR CNRS 8067), Muséum National d'Histoire Naturelle, Sorbonne Université, Université de Caen Normandie, IRD 207, Université des Antilles. Centre de Recherches en Environnement Côtier (CREC) - Station Marine, Caen, France
| | | | - Quentin Lesage
- Normandie Université, Université de Caen Normandie, Caen, France
| | - Mathias Peccate
- Normandie Université, Université de Caen Normandie, Caen, France
| | - Bastien Hamel
- Normandie Université, Université de Caen Normandie, Caen, France
| | - Marine Georges
- Ecole Supérieure d'Ingénieurs des Travaux de la Construction de Caen (ESITC Caen), Epron, France
| | - Amel Bourguiba
- Ecole Supérieure d'Ingénieurs des Travaux de la Construction de Caen (ESITC Caen), Epron, France
| | - Nassim Sebaibi
- Ecole Supérieure d'Ingénieurs des Travaux de la Construction de Caen (ESITC Caen), Epron, France
| | - Mohamed Boutouil
- Ecole Supérieure d'Ingénieurs des Travaux de la Construction de Caen (ESITC Caen), Epron, France
| | - Didier Goux
- Centre de Microscopie Appliquée à la Biologie, SF 4206 Interaction Cellule-Organisme-Environnement (ICORE), UNICAEN; and CRISMAT, Normandie Univ, ENSICAEN, UNICAEN, CNRS, CRISMAT, Caen, France
| | - Jean-Claude Dauvin
- Laboratoire Morphodynamique Continentale et Côtière, UMR CNRS 6143 M2C, Normandie Université, Université de Caen Normandie, UNIROUEN, Caen, France
| | - Francis Orvain
- Normandie Université, Université de Caen Normandie, Caen, France
- Laboratoire Biologie des ORganismes et Ecosystèmes Aquatiques (BOREA, UMR CNRS 8067), Muséum National d'Histoire Naturelle, Sorbonne Université, Université de Caen Normandie, IRD 207, Université des Antilles. Centre de Recherches en Environnement Côtier (CREC) - Station Marine, Caen, France
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10
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Coclet C, Garnier C, D’Onofrio S, Durrieu G, Pasero E, Le Poupon C, Omanović D, Mullot JU, Misson B, Briand JF. Trace Metal Contamination Impacts Predicted Functions More Than Structure of Marine Prokaryotic Biofilm Communities in an Anthropized Coastal Area. Front Microbiol 2021; 12:589948. [PMID: 33679628 PMCID: PMC7933014 DOI: 10.3389/fmicb.2021.589948] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2020] [Accepted: 01/29/2021] [Indexed: 12/25/2022] Open
Abstract
Trace metal (TM) contamination in marine coastal areas is a worldwide threat for aquatic communities. However, little is known about the influence of a multi-chemical contamination on both marine biofilm communities' structure and functioning. To determine how TM contamination potentially impacted microbial biofilms' structure and their functions, polycarbonate (PC) plates were immerged in both surface and bottom of the seawater column, at five sites, along strong TM contamination gradients, in Toulon Bay. The PC plates were incubated during 4 weeks to enable colonization by biofilm-forming microorganisms on artificial surfaces. Biofilms from the PC plates, as well as surrounding seawaters, were collected and analyzed by 16S rRNA amplicon gene sequencing to describe prokaryotic community diversity, structure and functions, and to determine the relationships between bacterioplankton and biofilm communities. Our results showed that prokaryotic biofilm structure was not significantly affected by the measured environmental variables, while the functional profiles of biofilms were significantly impacted by Cu, Mn, Zn, and salinity. Biofilms from the contaminated sites were dominated by tolerant taxa to contaminants and specialized hydrocarbon-degrading microorganisms. Functions related to major xenobiotics biodegradation and metabolism, such as methane metabolism, degradation of aromatic compounds, and benzoate degradation, as well as functions involved in quorum sensing signaling, extracellular polymeric substances (EPS) matrix, and biofilm formation were significantly over-represented in the contaminated site relative to the uncontaminated one. Taken together, our results suggest that biofilms may be able to survive to strong multi-chemical contamination because of the presence of tolerant taxa in biofilms, as well as the functional responses of biofilm communities. Moreover, biofilm communities exhibited significant variations of structure and functional profiles along the seawater column, potentially explained by the contribution of taxa from surrounding sediments. Finally, we found that both structure and functions were significantly distinct between the biofilm and bacterioplankton, highlighting major differences between the both lifestyles, and the divergence of their responses facing to a multi-chemical contamination.
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Affiliation(s)
- Clément Coclet
- Université de Toulon, Laboratoire MAPIEM, EA 4323, Toulon, France
- Université de Toulon, Aix Marseille Université, CNRS, IRD, Mediterranean Institute of Oceanography, UM110, La Garde, France
| | - Cédric Garnier
- Université de Toulon, Aix Marseille Université, CNRS, IRD, Mediterranean Institute of Oceanography, UM110, La Garde, France
| | - Sébastien D’Onofrio
- Université de Toulon, Aix Marseille Université, CNRS, IRD, Mediterranean Institute of Oceanography, UM110, La Garde, France
| | - Gaël Durrieu
- Université de Toulon, Aix Marseille Université, CNRS, IRD, Mediterranean Institute of Oceanography, UM110, La Garde, France
| | - Emilie Pasero
- Microbia Environnement Observatoire Océanologique, Banyuls-sur-Mer, France
| | - Christophe Le Poupon
- Université de Toulon, Aix Marseille Université, CNRS, IRD, Mediterranean Institute of Oceanography, UM110, La Garde, France
| | - Dario Omanović
- Division for Marine and Environmental Research, Ruðer Bošković Institute, Zagreb, Croatia
| | | | - Benjamin Misson
- Université de Toulon, Aix Marseille Université, CNRS, IRD, Mediterranean Institute of Oceanography, UM110, La Garde, France
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11
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Microbial Colonization in Marine Environments: Overview of Current Knowledge and Emerging Research Topics. JOURNAL OF MARINE SCIENCE AND ENGINEERING 2020. [DOI: 10.3390/jmse8020078] [Citation(s) in RCA: 60] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Microbial biofilms are biological structures composed of surface-attached microbial communities embedded in an extracellular polymeric matrix. In aquatic environments, the microbial colonization of submerged surfaces is a complex process involving several factors, related to both environmental conditions and to the physical-chemical nature of the substrates. Several studies have addressed this issue; however, more research is still needed on microbial biofilms in marine ecosystems. After a brief report on environmental drivers of biofilm formation, this study reviews current knowledge of microbial community attached to artificial substrates, as obtained by experiments performed on several material types deployed in temperate and extreme polar marine ecosystems. Depending on the substrate, different microbial communities were found, sometimes highlighting the occurrence of species-specificity. Future research challenges and concluding remarks are also considered. Emphasis is given to future perspectives in biofilm studies and their potential applications, related to biofouling prevention (such as cell-to-cell communication by quorum sensing or improved knowledge of drivers/signals affecting biological settlement) as well as to the potential use of microbial biofilms as sentinels of environmental changes and new candidates for bioremediation purposes.
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Abed RMM, Muthukrishnan T, Al Khaburi M, Al-Senafi F, Munam A, Mahmoud H. Degradability and biofouling of oxo-biodegradable polyethylene in the planktonic and benthic zones of the Arabian Gulf. MARINE POLLUTION BULLETIN 2020; 150:110639. [PMID: 31706724 DOI: 10.1016/j.marpolbul.2019.110639] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2019] [Revised: 09/29/2019] [Accepted: 09/29/2019] [Indexed: 05/21/2023]
Abstract
Little is known about the degradability of oxo-biodegradable polyethylene (OXO-PE) and its surface fouling bacterial communities in the marine environment. The degradation of OXO-PE, PE and polyethylene terephthalate (PET) was compared at two depths (2 m and 6 m) in the Arabian Gulf. Scanning electron microcopy (SEM) revealed more fissure formation on OXO-PE and PE than on PET, indicating physical degradation. The formation of hydroxyl groups and carbonyl bonds, by Fourier-transform infrared spectroscopy (FTIR), suggests chemical degradation of OXO-PE. Plastisphere bacterial communities on OXO-PE and PE were different than on PET. Proteobacteria, Bacteriodetes and Planctomycetes were detected on all plastics, however, sequences of Alteromonas and Zoogloea were OXO-PE-specific suggesting a possible involvement of these bacterial genera in OXO-PE degradation. We conclude that OXO-PE shows increased signs of degradation with time owing to the combination of abiotic and biotic processes, and its degradation is higher in the benthic than in the planktonic zone.
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Affiliation(s)
- Raeid M M Abed
- Biology Department, College of Science, Sultan Qaboos University, P. O. Box: 36, PC 123, Al Khoud, Sultanate of Oman.
| | - Thirumahal Muthukrishnan
- Biology Department, College of Science, Sultan Qaboos University, P. O. Box: 36, PC 123, Al Khoud, Sultanate of Oman
| | - Maryam Al Khaburi
- Biology Department, College of Science, Sultan Qaboos University, P. O. Box: 36, PC 123, Al Khoud, Sultanate of Oman
| | - Fahad Al-Senafi
- Department of Marine Sciences, Faculty of Science, Kuwait University, P.O. Box 5969, Safat, Kuwait
| | - Abdul Munam
- Chemistry Department, College of Science, Sultan Qaboos University, P. O. Box: 36, PC 123, Al Khoud, Sultanate of Oman
| | - Huda Mahmoud
- Department of Biological Sciences, Faculty of Science, Kuwait University, P.O. Box 5969, Safat, Kuwait
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13
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Angelova AG, Ellis GA, Wijesekera HW, Vora GJ. Microbial Composition and Variability of Natural Marine Planktonic and Biofouling Communities From the Bay of Bengal. Front Microbiol 2019; 10:2738. [PMID: 31866960 PMCID: PMC6908470 DOI: 10.3389/fmicb.2019.02738] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2019] [Accepted: 11/11/2019] [Indexed: 12/18/2022] Open
Abstract
The Bay of Bengal (BoB) is the largest bay in the world and presents a unique marine environment that is subjected to severe weather, a distinct hydrographic regime and a large anthropogenic footprint. Despite these features and the BoB’s overall economic significance, this ecosystem and its microbiome remain among the most underexplored in the world. In this study, amplicon-based microbial profiling was used to assess the bacterial, archaeal, and micro-eukaryotic content of unperturbed planktonic and biofilm/biofouling communities within the BoB. Planktonic microbial communities were collected during the Southwest monsoon season from surface (2 m), subsurface (75 m), and deep-sea (1000 m) waters from six south-central BoB locations and were compared to concomitant mature biofouling communities from photic-zone subsurface moorings (∼75 m). The results demonstrated vertical stratification of all planktonic communities with geographic variations disappearing in the deep-sea environment. Planktonic microbial diversity was found to be driven by different members of the community, with the most dominant phylotypes driving the diversity of the photic zone and rarer species playing a more influential role within the deep-sea. Geographic variability was not observed in the co-located biofouling microbiomes, but community composition and variability was found to be driven by depth and the presence of macro-fouling and photosynthetic organisms. Overall, these results provide much needed baselines for longitudinal assessments that can be used to monitor the health and evolution of this dynamic and critically important marine environment.
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Affiliation(s)
- Angelina G Angelova
- American Society for Engineering Education, Postdoctoral Fellowship Program, U.S. Naval Research Laboratory, Washington, DC, United States
| | - Gregory A Ellis
- Center for Bio/Molecular Science and Engineering, U.S. Naval Research Laboratory, Washington, DC, United States
| | | | - Gary J Vora
- Center for Bio/Molecular Science and Engineering, U.S. Naval Research Laboratory, Washington, DC, United States
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Antunes J, Leão P, Vasconcelos V. Marine biofilms: diversity of communities and of chemical cues. ENVIRONMENTAL MICROBIOLOGY REPORTS 2019; 11:287-305. [PMID: 30246474 DOI: 10.1111/1758-2229.12694] [Citation(s) in RCA: 48] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/05/2018] [Accepted: 09/14/2018] [Indexed: 06/08/2023]
Abstract
Surfaces immersed in seawater are rapidly colonized by various microorganisms, resulting in the formation of heterogenic marine biofilms. These communities are known to influence the settlement of algae spores and invertebrate larvae, triggering a succession of fouling events, with significant environmental and economic impacts. This review covers recent research regarding the differences in composition of biofilms isolated from different artificial surface types and the influence of environmental factors on their formation. One particular phenomenon - bacterial quorum sensing (QS) - allows bacteria to coordinate swarming, biofilm formation among other phenomena. Some other marine biofilm chemical cues are believed to modulate the settlement and the succession of macrofouling organisms, and they are also reviewed here. Finally, since the formation of a marine biofilm is considered to be an initial, QS-dependent step in the development of marine fouling events, QS inhibition is discussed on its potential as a tool for antibiofouling control in marine settings.
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Affiliation(s)
- Jorge Antunes
- CIIMAR/CIMAR - Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Av. General Norton de Matos, s/n 4450-208, Matosinhos, Portugal
- Department of Biology, Faculty of Sciences, University of Porto, Rua do Campo Alegre 4069-007, Porto, Portugal
| | - Pedro Leão
- CIIMAR/CIMAR - Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Av. General Norton de Matos, s/n 4450-208, Matosinhos, Portugal
- Department of Biology, Faculty of Sciences, University of Porto, Rua do Campo Alegre 4069-007, Porto, Portugal
| | - Vitor Vasconcelos
- CIIMAR/CIMAR - Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Av. General Norton de Matos, s/n 4450-208, Matosinhos, Portugal
- Department of Biology, Faculty of Sciences, University of Porto, Rua do Campo Alegre 4069-007, Porto, Portugal
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Rajeev M, Sushmitha TJ, Toleti SR, Pandian SK. Culture dependent and independent analysis and appraisal of early stage biofilm-forming bacterial community composition in the Southern coastal seawater of India. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 666:308-320. [PMID: 30798240 DOI: 10.1016/j.scitotenv.2019.02.171] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/10/2018] [Revised: 01/21/2019] [Accepted: 02/11/2019] [Indexed: 06/09/2023]
Abstract
Microbial aggregation on artificial surfaces is a fundamental phenomenon in aquatic systems that lead to biofouling, corrosion and influence the buoyancy of plastic materials. Despite the maritime activities and with nearshore large industrial sector, Laccadive Sea in the Indian Ocean has rarely been investigated for characterizing early biofilm-forming bacterial community. The present investigation was aimed to catalogue the primary colonizers on artificial surfaces and their comparison with planktonic community in southern coastal seawater of India. Surface seawater samples and biofilm assembled on three artificial surfaces over a period of 72 h of immersion in the intake area of a nuclear power plant at Kudankulam, India were collected. The structure of surface assemblages and plankton were unveiled by employing culture dependent, DGGE and NGS methods. In static condition, a collection of aerobic heterotrophic bacteria was screened in vitro for their ability to form potent biofilm. Proteobacteria preponderated the communities both in seawater and natural biofilm and Gammaproteobacteria accounted for >85% in the latter. Vibrionaceae, Alteromonadaceae and Pseudoalteromonadaceae dominated the biofilm community and constituted for 41, 25 and 8%, respectively. In contrast to other studies that showed Rhodobacteraceae family of Alphaproteobacteria as predominant component, we found Vibrionaceae of Gammaproteobacteria as dominant group in early stage of biofilm formation. Both DGGE and NGS data indicated that the attached community is noticeably distinct from those suspended in water column and form the basis for the proposed hypothesis of species sorting theory, that is, the local environmental conditions influence bacterial community assembly. Collectively, the data are testament for species sorting process that occur during initial assembly of bacterial community in marine environment and shed light on the structure of marine bacterial biofilm development. The outcome of the present study is of immense importance for designing long-term, efficient and appropriate strategies to control the biofouling phenomenon.
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Affiliation(s)
- Meora Rajeev
- Department of Biotechnology, Alagappa University, Science Campus, Karaikudi 630 003, Tamil Nadu, India
| | - T J Sushmitha
- Department of Biotechnology, Alagappa University, Science Campus, Karaikudi 630 003, Tamil Nadu, India
| | - Subba Rao Toleti
- Water and Steam Chemistry Division, Bhabha Atomic Research Centre Facilities, Kalpakkam 603 102, Tamil Nadu, India
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Methou P, Hernández-Ávila I, Aube J, Cueff-Gauchard V, Gayet N, Amand L, Shillito B, Pradillon F, Cambon-Bonavita MA. Is It First the Egg or the Shrimp? - Diversity and Variation in Microbial Communities Colonizing Broods of the Vent Shrimp Rimicaris exoculata During Embryonic Development. Front Microbiol 2019; 10:808. [PMID: 31057515 PMCID: PMC6478704 DOI: 10.3389/fmicb.2019.00808] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2018] [Accepted: 03/29/2019] [Indexed: 12/26/2022] Open
Abstract
Rimicaris exoculata is one of the most well-known and emblematic species of endemic vent fauna. Like many other species from these ecosystems, Rimicaris shrimps host important communities of chemosynthetic bacteria living in symbiosis with their host inside the cephalothorax and gut. For many of these symbiotic partners, the mode of transmission remains to be elucidated and the starting point of the symbiotic relationship is not yet defined, but could begin with the egg. In this study, we explored the proliferation of microbial communities on R. exoculata broods through embryonic development using a combination of NGS sequencing and microscopy approaches. Variations in abundance and diversity of egg microbial communities were analyzed in broods at different developmental stages and collected from mothers at two distinct vent fields on the Mid-Atlantic Ridge (TAG and Snake Pit). We also assessed the specificity of the egg microbiome by comparing communities developing on egg surfaces with those developing on the cuticle of pleopods, which are thought to be exposed to similar environmental conditions because the brood is held under the female's abdomen. In terms of abundance, bacterial colonization clearly increases with both egg developmental stage and the position of the egg within the brood: those closest to the exterior having a higher bacterial coverage. Bacterial biomass increase also accompanies an increase of mineral precipitations and thus clearly relates to the degree of exposure to vent fluids. In terms of diversity, most bacterial lineages were found in all samples and were also those found in the cephalothorax of adults. However, significant variation occurs in the relative abundance of these lineages, most of this variation being explained by body surface (egg vs. pleopod), vent field, and developmental stage. The occurrence of symbiont-related lineages of Epsilonbacteraeota, Gammaproteobacteria, Zetaproteobacteria, and Mollicutes provide a basis for discussion on both the acquisition of symbionts and the potential roles of these bacterial communities during egg development.
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Affiliation(s)
- Pierre Methou
- Univ Brest, CNRS, Ifremer, Laboratoire de Microbiologie des Environnements Extrêmes, Plouzané, France
- Ifremer, Laboratoire Environnement Profond (REM/EEP/LEP), Plouzané, France
| | - Ivan Hernández-Ávila
- Univ Brest, CNRS, Ifremer, Laboratoire de Microbiologie des Environnements Extrêmes, Plouzané, France
- Ifremer, Laboratoire Environnement Profond (REM/EEP/LEP), Plouzané, France
| | - Johanne Aube
- Univ Brest, CNRS, Ifremer, Laboratoire de Microbiologie des Environnements Extrêmes, Plouzané, France
| | - Valérie Cueff-Gauchard
- Univ Brest, CNRS, Ifremer, Laboratoire de Microbiologie des Environnements Extrêmes, Plouzané, France
| | - Nicolas Gayet
- Ifremer, Laboratoire Environnement Profond (REM/EEP/LEP), Plouzané, France
| | - Louis Amand
- Unité Biologie des Organismes et Ecosystèmes Aquatiques, Muséum National d’Histoire Naturelle, Eq. Adaptations aux Milieux Extrêmes (BOREA), CNRS, IRD, Sorbonne Université, Université de Caen Normandie, Université des Antilles, Paris, France
| | - Bruce Shillito
- Unité Biologie des Organismes et Ecosystèmes Aquatiques, Muséum National d’Histoire Naturelle, Eq. Adaptations aux Milieux Extrêmes (BOREA), CNRS, IRD, Sorbonne Université, Université de Caen Normandie, Université des Antilles, Paris, France
| | - Florence Pradillon
- Ifremer, Laboratoire Environnement Profond (REM/EEP/LEP), Plouzané, France
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17
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Ding W, Zhang W, Alikunhi NM, Batang Z, Pei B, Wang R, Chen L, Al-Suwailem A, Qian PY. Metagenomic Analysis of Zinc Surface-Associated Marine Biofilms. MICROBIAL ECOLOGY 2019; 77:406-416. [PMID: 30612183 DOI: 10.1007/s00248-018-01313-3] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2018] [Accepted: 12/20/2018] [Indexed: 05/10/2023]
Abstract
Biofilms are a significant source of marine biofouling. Marine biofilm communities are established when microorganisms adhere to immersed surfaces. Despite the microbe-inhibiting effect of zinc surfaces, microbes can still attach to the surface and form biofilms. However, the diversity of biofilm-forming microbes that can attach to zinc surfaces and their common functional features remain elusive. Here, by analyzing 9,000,000 16S rRNA gene amplicon sequences and 270 Gb of metagenomic data, we comprehensively explored the taxa and functions related to biofilm formation in subtidal zones of the Red Sea. A clear difference was observed between the biofilm and adjacent seawater microbial communities in terms of the taxonomic structure at phylum and genus levels, and a huge number of genera were only present in the biofilms. Saturated alpha-diversity curves suggested the existence of more than 14,000 operational taxonomic units in one biofilm sample, which is much higher than previous estimates. Remarkably, the biofilms contained abundant and diverse transposase genes, which were localized along microbial chromosomal segments and co-existed with genes related to metal ion transport and resistance. Genomic analyses of two cyanobacterial strains that were abundant in the biofilms revealed a variety of metal ion transporters and transposases. Our analyses revealed the high diversity of biofilm-forming microbes that can attach to zinc surfaces and the ubiquitous role of transposase genes in microbial adaptation to toxic metal surfaces.
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Affiliation(s)
- Wei Ding
- Division of Life Science, Hong Kong University of Science and Technology, Hong Kong, China
| | - Weipeng Zhang
- Department of Ocean Science, Hong Kong University of Science and Technology, Hong Kong, China
| | | | - Zenon Batang
- King Abdullah University of Science and Technology, Thuwal, Saudi Arabia
| | - Bite Pei
- Department of Ocean Science, Hong Kong University of Science and Technology, Hong Kong, China
| | - Ruojun Wang
- Department of Ocean Science, Hong Kong University of Science and Technology, Hong Kong, China
| | - Lianguo Chen
- Division of Life Science, Hong Kong University of Science and Technology, Hong Kong, China
| | | | - Pei-Yuan Qian
- Division of Life Science, Hong Kong University of Science and Technology, Hong Kong, China.
- Department of Ocean Science, Hong Kong University of Science and Technology, Hong Kong, China.
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18
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Tsabaris C, Androulakaki E, Alexakis S, Patiris D. An in-situ gamma-ray spectrometer for the deep ocean. Appl Radiat Isot 2018; 142:120-127. [DOI: 10.1016/j.apradiso.2018.08.024] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2018] [Revised: 06/29/2018] [Accepted: 08/30/2018] [Indexed: 11/30/2022]
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19
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Dobretsov S, Abed RMM, Muthukrishnan T, Sathe P, Al-Naamani L, Queste BY, Piontkovski S. Living on the edge: biofilms developing in oscillating environmental conditions. BIOFOULING 2018; 34:1064-1077. [PMID: 30621450 DOI: 10.1080/08927014.2018.1539707] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2018] [Revised: 10/15/2018] [Accepted: 10/16/2018] [Indexed: 06/09/2023]
Abstract
For the first time, the densities and diversity of microorganisms developed on ocean gliders were investigated using flow cytometry and Illumina MiSeq sequencing of 16S and 18S rRNA genes. Ocean gliders are autonomous buoyancy-driven underwater vehicles, equipped with sensors continuously recording physical, chemical, and biological parameters. Microbial biofilms were investigated on unprotected parts of the glider and surfaces coated with base, biocidal and chitosan paints. Biofilms on the glider were exposed to periodical oscillations of salinity, oxygen, temperature, pressure, depth and light, due to periodic ascending and descending of the vehicle. Among the unprotected surfaces, the highest microbial abundance was observed on the bottom of the glider's body, while the lowest density was recorded on the glider's nose. Antifouling paints had the lowest densities of microorganisms. Multidimensional analysis showed that the microbial communities formed on unprotected parts of the glider were significantly different from those on biocidal paint and in seawater.
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Affiliation(s)
- Sergey Dobretsov
- a Marine Science and Fisheries Department, College of Agricultural and Marine Sciences , Sultan Qaboos University , Muscat , Oman
- b Centre of Excellence in Marine Biotechnology , Sultan Qaboos University , Muscat , Oman
| | - Raeid M M Abed
- c Department of Biology, College of Science , Sultan Qaboos University , Muscat , Oman
| | - Thirumahal Muthukrishnan
- a Marine Science and Fisheries Department, College of Agricultural and Marine Sciences , Sultan Qaboos University , Muscat , Oman
- c Department of Biology, College of Science , Sultan Qaboos University , Muscat , Oman
| | - Priyanka Sathe
- a Marine Science and Fisheries Department, College of Agricultural and Marine Sciences , Sultan Qaboos University , Muscat , Oman
| | - Laila Al-Naamani
- a Marine Science and Fisheries Department, College of Agricultural and Marine Sciences , Sultan Qaboos University , Muscat , Oman
| | - Bastien Y Queste
- d Centre for Ocean and Atmospheric Sciences , University of East Anglia , Norwich , UK
| | - Sergey Piontkovski
- a Marine Science and Fisheries Department, College of Agricultural and Marine Sciences , Sultan Qaboos University , Muscat , Oman
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Briand JF, Barani A, Garnier C, Réhel K, Urvois F, LePoupon C, Bouchez A, Debroas D, Bressy C. Spatio-Temporal Variations of Marine Biofilm Communities Colonizing Artificial Substrata Including Antifouling Coatings in Contrasted French Coastal Environments. MICROBIAL ECOLOGY 2017; 74:585-598. [PMID: 28374061 DOI: 10.1007/s00248-017-0966-2] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2016] [Accepted: 03/14/2017] [Indexed: 06/07/2023]
Abstract
Surface colonization in seawater first corresponds to the selection of specific microbial biofilm communities. By coupling flow cytometry, microscopy and high throughput sequencing (HTS, 454 pyrosequencing) with artificial surfaces and environmental analyses, we intend to identify the contribution of biofilm community drivers at two contrasted French sites, one temperate and eutrophic (Lorient, Atlantic coast) and the other at a mesotrophic but highly contaminated bay (Toulon, North-Western Mediterranean Sea). Microbial communities were shaped by high temperatures, salinity and lead at Toulon by but nutrients and DOC at Lorient. Coatings including pyrithione exhibited a significant decrease of their microbial densities except for nanoeukaryotes. Clustering of communities was mainly based on the surface type and secondly the site, whereas seasons appeared of less importance. The in-depth HTS revealed that γ- and α-proteobacteria, but also Bacteroidetes, dominated highly diversified bacterial communities with a relative low β-diversity. Sensitivity to biocides released by the tested antifouling coatings could be noticed at different taxonomic levels: the percentage of Bacteroidetes overall decreased with the presence of pyrithione, whereas the α/γ-proteobacteria ratio decreased at Toulon when increased at Lorient. Small diatom cells (Amphora and Navicula spp.) dominated on all surfaces, whereas site-specific sub-dominant taxa appeared clearly more sensitive to biocides. This overall approach exhibited the critical significance of surface characteristics in biofilm community shaping.
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Affiliation(s)
| | - Aude Barani
- CNRS/INSU, IRD, Institut Méditerranéen d'Océanologie (MIO), Université d'Aix-Marseille, Université de Toulon, Marseille, France
| | | | - Karine Réhel
- LBCM -EA 3883, IUEM, Université de Bretagne Sud, Lorient, France
| | - Félix Urvois
- MAPIEM-EA 4323, Université de Toulon, La Garde, France
| | | | - Agnès Bouchez
- UMR CARRTEL, INRA, Université Savoie Mont Blanc, Thonon-Les-Bains, France
| | - Didier Debroas
- Laboratoire "Microorganismes: Génome et Environnement, Clermont Université, Université Blaise Pascal, BP 10448, F-63000, Clermont-Ferrand, France
- UMR 6023, LMGE, CNRS, F-63171, Aubiere, France
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21
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A survey of biofilms on wastewater aeration diffusers suggests bacterial community composition and function vary by substrate type and time. Appl Microbiol Biotechnol 2016; 100:6361-6373. [DOI: 10.1007/s00253-016-7604-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2016] [Revised: 04/27/2016] [Accepted: 05/02/2016] [Indexed: 01/06/2023]
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Xie ZM, Zhou T, Liao HY, Ye Q, Liu S, Qi L, Huang J, Zuo HJ, Pei XF. Effects of Ligustrum robustum on gut microbes and obesity in rats. World J Gastroenterol 2015; 21:13042-13054. [PMID: 26676281 PMCID: PMC4674722 DOI: 10.3748/wjg.v21.i46.13042] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/17/2015] [Revised: 06/19/2015] [Accepted: 09/30/2015] [Indexed: 02/07/2023] Open
Abstract
AIM: To investigate the anti-obesity and antibacterial effects of Ligustrum robustum (L. robustum) in vivo and in vitro and its possible mechanisms.
METHODS: The effects of L. robustum aqueous extract (LR) on various gut bacteria in vitro were evaluated. The effects of LR on high-fat diet-fed (HFD) rats in vivo were also assessed. Culture methods, quantitative polymerase chain reaction, and terminal-restriction fragment length polymorphism were used to analyze the effects of LR on gut bacteria. Biochemical tests were also performed to detect the changes in obesity-related indicators after LR treatment.
RESULTS: LR treatment lowered adipose weight and decreased Lee’s index, blood glucose, total cholesterol, and lipid in the tested groups relative to control (P < 0.05). To determine the reasons for these changes, we assessed the potential bacteriostatic and bactericidal effects of LR on specific bacterial species in vitro. LR affected the richness, diversity, and evenness of gut bacteria, increased fecal Lactobacillus, and decreased Enterococci in HFD rats (P < 0.05).
CONCLUSION: L. robustum may be a safe and effective food for weight loss and obesity control, and the effects of L. robustum might be mediated by the regulation of gut bacteria.
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Tan ELY, Mayer-Pinto M, Johnston EL, Dafforn KA. Differences in Intertidal Microbial Assemblages on Urban Structures and Natural Rocky Reef. Front Microbiol 2015; 6:1276. [PMID: 26635747 PMCID: PMC4653414 DOI: 10.3389/fmicb.2015.01276] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2015] [Accepted: 10/31/2015] [Indexed: 02/01/2023] Open
Abstract
Global seascapes are increasingly modified to support high levels of human activity in the coastal zone. Modifications include the addition of defense structures and boating infrastructure, such as seawalls and marinas that replace natural habitats. Artificial structures support different macrofaunal communities to those found on natural rocky shores; however, little is known about differences in microbial community structure or function in urban seascapes. Understanding how artificial constructions in marine environments influence microbial communities is important as these assemblages contribute to many basic ecological processes. In this study, the bacterial communities of intertidal biofilms were compared between artificial structures (seawalls) and natural habitats (rocky shores) within Sydney Harbour. Plots were cleared on each type of habitat at eight locations. After 3 weeks the newly formed biofilm was sampled and the 16S rRNA gene sequenced using the Illumina Miseq platform. To account for differences in orientation and substrate material between seawalls and rocky shores that might have influenced our survey, we also deployed recruitment blocks next to the habitats at all locations for 3 weeks and then sampled and sequenced their microbial communities. Intertidal bacterial community structure sampled from plots differed between seawalls and rocky shores, but when substrate material, age and orientation were kept constant (with recruitment blocks) then bacterial communities were similar in composition and structure among habitats. This suggests that changes in bacterial communities on seawalls are not related to environmental differences between locations, but may be related to other intrinsic factors that differ between the habitats such as orientation, complexity, or predation. This is one of the first comparisons of intertidal microbial communities on natural and artificial surfaces and illustrates substantial ecological differences with potential consequences for biofilm function and the recruitment of macrofauna.
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Affiliation(s)
- Elisa L-Y Tan
- Evolution and Ecology Research Centre, School of Biological, Earth and Environmental Sciences, University of New South Wales, Sydney NSW, Australia ; Sydney Institute of Marine Science, Mosman NSW, Australia
| | - Mariana Mayer-Pinto
- Evolution and Ecology Research Centre, School of Biological, Earth and Environmental Sciences, University of New South Wales, Sydney NSW, Australia ; Sydney Institute of Marine Science, Mosman NSW, Australia
| | - Emma L Johnston
- Evolution and Ecology Research Centre, School of Biological, Earth and Environmental Sciences, University of New South Wales, Sydney NSW, Australia ; Sydney Institute of Marine Science, Mosman NSW, Australia
| | - Katherine A Dafforn
- Evolution and Ecology Research Centre, School of Biological, Earth and Environmental Sciences, University of New South Wales, Sydney NSW, Australia ; Sydney Institute of Marine Science, Mosman NSW, Australia
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Zhang W, Wang Y, Bougouffa S, Tian R, Cao H, Li Y, Cai L, Wong YH, Zhang G, Zhou G, Zhang X, Bajic VB, Al-Suwailem A, Qian PY. Synchronized dynamics of bacterial niche-specific functions during biofilm development in a cold seep brine pool. Environ Microbiol 2015; 17:4089-104. [DOI: 10.1111/1462-2920.12978] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2015] [Revised: 07/01/2015] [Accepted: 07/02/2015] [Indexed: 11/27/2022]
Affiliation(s)
- Weipeng Zhang
- KAUST Global Partnership Program; Division of Life Science; Hong Kong University of Science and Technology; Clear Water Bay Hong Kong China
| | - Yong Wang
- Sanya Institute of Deep Sea Science and Engineering; Chinese Academy of Sciences; Sanya Hainan China
| | - Salim Bougouffa
- King Abdullah University of Science and Technology; Thuwal The Kingdom of Saudi Arabia
| | - Renmao Tian
- KAUST Global Partnership Program; Division of Life Science; Hong Kong University of Science and Technology; Clear Water Bay Hong Kong China
| | - Huiluo Cao
- KAUST Global Partnership Program; Division of Life Science; Hong Kong University of Science and Technology; Clear Water Bay Hong Kong China
| | - Yongxin Li
- KAUST Global Partnership Program; Division of Life Science; Hong Kong University of Science and Technology; Clear Water Bay Hong Kong China
| | - Lin Cai
- KAUST Global Partnership Program; Division of Life Science; Hong Kong University of Science and Technology; Clear Water Bay Hong Kong China
| | - Yue Him Wong
- KAUST Global Partnership Program; Division of Life Science; Hong Kong University of Science and Technology; Clear Water Bay Hong Kong China
| | - Gen Zhang
- KAUST Global Partnership Program; Division of Life Science; Hong Kong University of Science and Technology; Clear Water Bay Hong Kong China
| | - Guowei Zhou
- KAUST Global Partnership Program; Division of Life Science; Hong Kong University of Science and Technology; Clear Water Bay Hong Kong China
| | - Xixiang Zhang
- King Abdullah University of Science and Technology; Thuwal The Kingdom of Saudi Arabia
| | - Vladimir B. Bajic
- King Abdullah University of Science and Technology; Thuwal The Kingdom of Saudi Arabia
| | - Abdulaziz Al-Suwailem
- King Abdullah University of Science and Technology; Thuwal The Kingdom of Saudi Arabia
| | - Pei-Yuan Qian
- KAUST Global Partnership Program; Division of Life Science; Hong Kong University of Science and Technology; Clear Water Bay Hong Kong China
- Sanya Institute of Deep Sea Science and Engineering; Chinese Academy of Sciences; Sanya Hainan China
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25
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Boraey MA, Guaily A, Epstein M. A hybrid model for biofilm growth on a deformable substratum. CAN J CHEM ENG 2015. [DOI: 10.1002/cjce.22172] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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26
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Zhang WP, Wang Y, Tian RM, Bougouffa S, Yang B, Cao HL, Zhang G, Wong YH, Xu W, Batang Z, Al-Suwailem A, Zhang XX, Qian PY. Species sorting during biofilm assembly by artificial substrates deployed in a cold seep system. Sci Rep 2014; 4:6647. [PMID: 25323200 PMCID: PMC4200420 DOI: 10.1038/srep06647] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2014] [Accepted: 07/07/2014] [Indexed: 11/09/2022] Open
Abstract
Studies focusing on biofilm assembly in deep-sea environments are rarely conducted. To examine the effects of substrate type on microbial community assembly, biofilms were developed on different substrates for different durations at two locations in the Red Sea: in a brine pool and in nearby bottom water (NBW) adjacent to the Thuwal cold seep II. The composition of the microbial communities in 51 biofilms and water samples were revealed by classification of pyrosequenced 16S rRNA gene amplicons. Together with the microscopic characteristics of the biofilms, the results indicate a stronger selection effect by the substrates on the microbial assembly in the brine pool compared with the NBW. Moreover, the selection effect by substrate type was stronger in the early stages compared with the later stages of the biofilm development. These results are consistent with the hypotheses proposed in the framework of species sorting theory, which states that the power of species sorting during microbial community assembly is dictated by habitat conditions, duration and the structure of the source community. Therefore, the results of this study shed light on the control strategy underlying biofilm-associated marine fouling and provide supporting evidence for ecological theories important for understanding the formation of deep-sea biofilms.
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Affiliation(s)
- Wei Peng Zhang
- KAUST Global Partnership Program, Division of Life Science, Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong
| | - Yong Wang
- 1] KAUST Global Partnership Program, Division of Life Science, Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong [2] Sanya Institute of Deep Sea Science and Engineering, Chinese Academy of Sciences, San Ya, Hai Nan, China
| | - Ren Mao Tian
- KAUST Global Partnership Program, Division of Life Science, Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong
| | - Salim Bougouffa
- KAUST Global Partnership Program, Division of Life Science, Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong
| | - Bo Yang
- KAUST Global Partnership Program, Division of Life Science, Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong
| | - Hui Luo Cao
- KAUST Global Partnership Program, Division of Life Science, Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong
| | - Gen Zhang
- KAUST Global Partnership Program, Division of Life Science, Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong
| | - Yue Him Wong
- KAUST Global Partnership Program, Division of Life Science, Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong
| | - Wei Xu
- King Abdullah University of Science and Technology, Thuwal, The Kingdom of Saudi Arabia
| | - Zenon Batang
- King Abdullah University of Science and Technology, Thuwal, The Kingdom of Saudi Arabia
| | - Abdulaziz Al-Suwailem
- King Abdullah University of Science and Technology, Thuwal, The Kingdom of Saudi Arabia
| | - Xi Xiang Zhang
- King Abdullah University of Science and Technology, Thuwal, The Kingdom of Saudi Arabia
| | - Pei-Yuan Qian
- KAUST Global Partnership Program, Division of Life Science, Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong
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27
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Brian-Jaisson F, Ortalo-Magné A, Guentas-Dombrowsky L, Armougom F, Blache Y, Molmeret M. Identification of bacterial strains isolated from the Mediterranean Sea exhibiting different abilities of biofilm formation. MICROBIAL ECOLOGY 2014; 68:94-110. [PMID: 24402359 DOI: 10.1007/s00248-013-0342-9] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/26/2013] [Accepted: 12/02/2013] [Indexed: 05/10/2023]
Abstract
The Mediterranean Sea has rarely been investigated for the characterization of marine bacteria as compared to other marine environments such as the Atlantic or Pacific Ocean. Bacteria recovered from inert surfaces are poorly studied in these environments, when it has been shown that the community structure of attached bacteria can be dissimilar from that of planktonic bacteria present in the water column. The objectives of this study were to identify and characterize marine bacteria isolated from biofilms developed on inert surfaces immersed in the Mediterranean Sea and to evaluate their capacity to form a biofilm in vitro. Here, 13 marine bacterial strains have been isolated from different supports immersed in seawater in the Bay of Toulon (France). Phylogenetic analysis and different biological and physico-chemical properties have been investigated. Among the 13 strains recovered, 8 different genera and 12 different species were identified including 2 isolates of a novel bacterial species that we named Persicivirga mediterranea and whose genus had never been isolated from the Mediterranean Sea. Shewanella sp. and Pseudoalteromonas sp. were the most preponderant genera recovered in our conditions. The phenotypical characterization revealed that one isolate belonging to the Polaribacter genus differed from all the other ones by its hydrophobic properties and poor ability to form biofilms in vitro. Identifying and characterizing species isolated from seawater including from Mediterranean ecosystems could be helpful for example, to understand some aspects of bacterial biodiversity and to further study the mechanisms of biofilm (and biofouling) development in conditions approaching those of the marine environment.
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28
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Lee OO, Wang Y, Tian R, Zhang W, Shek CS, Bougouffa S, Al-Suwailem A, Batang ZB, Xu W, Wang GC, Zhang X, Lafi FF, Bajic VB, Qian PY. In situ environment rather than substrate type dictates microbial community structure of biofilms in a cold seep system. Sci Rep 2014; 4:3587. [PMID: 24399144 PMCID: PMC5378041 DOI: 10.1038/srep03587] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2013] [Accepted: 12/05/2013] [Indexed: 02/05/2023] Open
Abstract
Using microscopic and molecular techniques combined with computational analysis, this study examined the structure and composition of microbial communities in biofilms that formed on different artificial substrates in a brine pool and on a seep vent of a cold seep in the Red Sea to test our hypothesis that initiation of the biofilm formation and spreading mode of microbial structures differs between the cold seep and the other aquatic environments. Biofilms on different substrates at two deployment sites differed morphologically, with the vent biofilms having higher microbial abundance and better structural features than the pool biofilms. Microbes in the pool biofilms were more taxonomically diverse and mainly composed of various sulfate-reducing bacteria whereas the vent biofilms were exclusively dominated by sulfur-oxidizing Thiomicrospira. These results suggest that the redox environments at the deployment sites might have exerted a strong selection on microbes in the biofilms at two sites whereas the types of substrates had limited effects on the biofilm development.
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Affiliation(s)
- On On Lee
- Division of Life Science, Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong
- These authors contribute equally to this work
| | - Yong Wang
- Sanya Institute of Deep Sea Science and Engineering, Chinese Academy of Sciences, San Ya, Hai Nan, China
- These authors contribute equally to this work
| | - Renmao Tian
- Division of Life Science, Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong
| | - Weipeng Zhang
- Division of Life Science, Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong
| | - Chun Shum Shek
- Division of Life Science, Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong
| | - Salim Bougouffa
- Division of Life Science, Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong
- Computational Biosciences Research Center, King Abdullah University of Science and Technology, Thuwal, Saudi Arabia
| | - Abdulaziz Al-Suwailem
- Coastal and Marine Resources Core Laboratory, King Abdullah University of Science and Technology, Thuwal, Saudi Arabia
| | - Zenon B. Batang
- Coastal and Marine Resources Core Laboratory, King Abdullah University of Science and Technology, Thuwal, Saudi Arabia
| | - Wei Xu
- Advanced Nanofabrication, Imaging, and Characterization Core Laboratory, King Abdullah University of Science and Technology, Thuwal, Saudi Arabia
| | - Guang Chao Wang
- Advanced Nanofabrication, Imaging, and Characterization Core Laboratory, King Abdullah University of Science and Technology, Thuwal, Saudi Arabia
| | - Xixiang Zhang
- Advanced Nanofabrication, Imaging, and Characterization Core Laboratory, King Abdullah University of Science and Technology, Thuwal, Saudi Arabia
| | - Feras F. Lafi
- Computational Biosciences Research Center, King Abdullah University of Science and Technology, Thuwal, Saudi Arabia
| | - Vladmir B. Bajic
- Computational Biosciences Research Center, King Abdullah University of Science and Technology, Thuwal, Saudi Arabia
| | - Pei-Yuan Qian
- Division of Life Science, Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong
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29
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Salta M, Capretto L, Carugo D, Wharton JA, Stokes KR. Life under flow: A novel microfluidic device for the assessment of anti-biofilm technologies. BIOMICROFLUIDICS 2013; 7:64118. [PMID: 24454610 PMCID: PMC3888455 DOI: 10.1063/1.4850796] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/15/2013] [Accepted: 12/05/2013] [Indexed: 05/15/2023]
Abstract
In the current study, we have developed and fabricated a novel lab-on-a-chip device for the investigation of biofilm responses, such as attachment kinetics and initial biofilm formation, to different hydrodynamic conditions. The microfluidic flow channels are designed using computational fluid dynamic simulations so as to have a pre-defined, homogeneous wall shear stress in the channels, ranging from 0.03 to 4.30 Pa, which are relevant to in-service conditions on a ship hull, as well as other man-made marine platforms. Temporal variations of biofilm formation in the microfluidic device were assessed using time-lapse microscopy, nucleic acid staining, and confocal laser scanning microscopy (CLSM). Differences in attachment kinetics were observed with increasing shear stress, i.e., with increasing shear stress there appeared to be a delay in bacterial attachment, i.e., at 55, 120, 150, and 155 min for 0.03, 0.60, 2.15, and 4.30 Pa, respectively. CLSM confirmed marked variations in colony architecture, i.e.,: (i) lower shear stresses resulted in biofilms with distinctive morphologies mainly characterised by mushroom-like structures, interstitial channels, and internal voids, and (ii) for the higher shear stresses compact clusters with large interspaces between them were formed. The key advantage of the developed microfluidic device is the combination of three architectural features in one device, i.e., an open-system design, channel replication, and multiple fully developed shear stresses.
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Affiliation(s)
- Maria Salta
- National Centre for Advanced Tribology at Southampton (nCATS), Engineering Sciences, University of Southampton, Southampton SO17 1BJ, United Kingdom
| | - Lorenzo Capretto
- Bioengineering Sciences Group, Engineering Sciences, University of Southampton, Southampton SO17 1BJ, United Kingdom
| | - Dario Carugo
- Bioengineering Sciences Group, Engineering Sciences, University of Southampton, Southampton SO17 1BJ, United Kingdom
| | - Julian A Wharton
- National Centre for Advanced Tribology at Southampton (nCATS), Engineering Sciences, University of Southampton, Southampton SO17 1BJ, United Kingdom
| | - Keith R Stokes
- National Centre for Advanced Tribology at Southampton (nCATS), Engineering Sciences, University of Southampton, Southampton SO17 1BJ, United Kingdom ; Physical Sciences Department, Defence Science and Technology Laboratory (Dstl), Porton Down, Salisbury SP4 0JQ, United Kingdom
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30
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Meier A, Tsaloglou NM, Mowlem MC, Keevil CW, Connelly DP. Hyperbaric biofilms on engineering surfaces formed in the deep sea. BIOFOULING 2013; 29:1029-1042. [PMID: 23964799 DOI: 10.1080/08927014.2013.824967] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Biofouling is a major problem for long-term deployment of sensors in the marine environment. This study showed that significant biofilm formation occurred on a variety of artificial materials (glass, copper, Delrin(™) and poly-methyl methacrylate [PMMA]) deployed for 10 days at a depth of 4700 m in the Cayman Trough. Biofilm surface coverage was used as an indicator of biomass. The lowest biofilm coverage was on copper and PMMA. Molecular analyses indicated that bacteria dominated the biofilms found on copper, Delrin(™) and PMMA with 75, 55 and 73% coverage, respectively. Archea (66%) were dominant on the glass surface simulating interior sensor conditions, whereas Eukarya comprised the highest percentage of microflora (75%) on the glass simulating the exterior of sensors. Analysis of Denaturing Gradient Gel Electrophoresis profiles indicated that copper and Delrin(™) shared the same community diversity, which was not the case for glass and PMMA, or between PMMA and copper/Delrin(™). Sequence alignment matches belonged exclusively to uncultivable microorganisms, most of which were not further classified. One extracted sequence found on glass was associated with Cowellia sp., while another extracted from the PMMA surface was associated with a bacterium in the Alterominidaceae, both γ-proteobacteria. The results demonstrate the necessity of understanding biofilm formation in the deep sea and the potential need for mitigation strategies for any kind of long-term deployment of remote sensors in the marine environment.
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MESH Headings
- Archaea/physiology
- Bacteria/genetics
- Bacterial Physiological Phenomena
- Biofilms/growth & development
- Caribbean Region
- DNA, Archaeal/genetics
- DNA, Archaeal/metabolism
- DNA, Bacterial/genetics
- DNA, Bacterial/metabolism
- Denaturing Gradient Gel Electrophoresis
- Eukaryota/genetics
- Eukaryota/physiology
- Hydrothermal Vents/microbiology
- Microscopy, Confocal
- Microscopy, Electron, Scanning
- Microscopy, Fluorescence
- Microscopy, Interference
- RNA, Ribosomal, 16S/genetics
- RNA, Ribosomal, 16S/metabolism
- RNA, Ribosomal, 18S/genetics
- RNA, Ribosomal, 18S/metabolism
- Time Factors
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Affiliation(s)
- Alexandra Meier
- a National Oceanography Centre, University of Southampton , Southampton , UK
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31
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Salta M, Wharton JA, Blache Y, Stokes KR, Briand JF. Marine biofilms on artificial surfaces: structure and dynamics. Environ Microbiol 2013; 15:2879-93. [PMID: 23869714 DOI: 10.1111/1462-2920.12186] [Citation(s) in RCA: 129] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2012] [Revised: 05/31/2013] [Accepted: 06/07/2013] [Indexed: 01/03/2023]
Abstract
The search for new antifouling (AF) coatings that are environmentally benign has led to renewed interest in the ways that micro-organisms colonize substrates in the marine environment. This review covers recently published research on the global species composition and dynamics of marine biofilms, consisting mainly of bacteria and diatoms found on man-made surfaces including AF coatings. Marine biofilms directly interact with larger organisms (macrofoulers) during colonization processes; hence, recent literature on understanding the basis of the biofilm/macrofouling interactions is essential and will also be reviewed here. Overall, differences have been identified in species composition between biofilm and planktonic forms for both diatoms and bacteria at various exposure sites. In most studies, the underlying biofilm was found to induce larval and spore settlement of macrofoulers; however, issues such as reproducibility, differences in exposure sites and biofilm composition (natural multispecies vs. monospecific species) may influence the outcomes.
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Affiliation(s)
- Maria Salta
- National Centre for Advanced Tribology at Southampton, Engineering Sciences, University of Southampton, Highfield, Southampton SO17 1BJ, UK.
| | - Julian A Wharton
- National Centre for Advanced Tribology at Southampton (nCATS), Engineering Sciences, University of Southampton, Highfield, Southampton, SO17 1BJ, UK
| | - Yves Blache
- MAPIEM, Biofouling et Substances Naturelles Marines, Universite du Sud Toulon-Var, La Valette-du-Var, France
| | - Keith R Stokes
- National Centre for Advanced Tribology at Southampton (nCATS), Engineering Sciences, University of Southampton, Highfield, Southampton, SO17 1BJ, UK.,Physical Sciences Department, DSTL, Porton Down, Salisbury, Wiltshire, SP4 0JQ, UK
| | - Jean-Francois Briand
- MAPIEM, Biofouling et Substances Naturelles Marines, Universite du Sud Toulon-Var, La Valette-du-Var, France
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32
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Yang JL, Shen PJ, Liang X, Li YF, Bao WY, Li JL. Larval settlement and metamorphosis of the mussel Mytilus coruscus in response to monospecific bacterial biofilms. BIOFOULING 2013; 29:247-259. [PMID: 23452123 DOI: 10.1080/08927014.2013.764412] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The effects of bacterial biofilms (BFs) on larval settlement and metamorphosis of the mussel, Mytilus coruscus, were investigated in the laboratory. Of nine different isolates, Shewanella sp.1 BF induced the highest percentage of larval settlement and metamorphosis, whereas seven other isolates had a moderate inducing activity and one isolate, Pseudoalteromonas sp. 4, had a no inducing activity. The inducing activity of individual bacterial isolates was not correlated either with their phylogenetic relationship or with the surfaces from which they were isolated. Among the eight bacterial species that demonstrated inducing activity, bacterial density was significantly correlated with the inducing activity for each strain, with the exception of Vibrio sp. 1. The Shewanella sp. 1 BF cue that was responsible for inducing larval settlement and metamorphosis was further investigated. Treatment of the BFs with formalin, antibiotics, ultraviolet irradiation, heat, and ethanol resulted in a significant decrease in their inducing activities and cell survival. BF-conditioned water (CW) did not induce larval metamorphosis, but it triggered larval settlement behavior. A synergistic effect of CW with formalin-fixed Shewanella sp. 1 BF significantly promoted larval metamorphosis. Thus, a cocktail of chemical cues derived from bacteria may be necessary to stimulate larval settlement and metamorphosis in this species.
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Affiliation(s)
- Jin-Long Yang
- College of Fisheries and Life Science, Shanghai Ocean University, Shanghai, China.
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