Testing the impact of biofilms on the performance of marine antifouling coatings

Howell, Dickon

doi:10.1533/9781845696313.2.422

Cited by 6 publications

(5 citation statements)

References 55 publications

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“…, equivalent to 1100 ppm. Copper is known to be toxic to a variety of fouling organisms [ 47 ]; therefore, it may be hypothesised that the presence of hexose oxidase in C. crispus could negatively affect M. hydrocarbonoclasticus and C. marina , because of its copper content. Furthermore, enzymatic generation of hydrogen peroxide (H 2 O 2 ) has been shown to have a promising AF efficacy [ 42 , 48 ].…”

Section: Resultsmentioning

confidence: 99%

Anti-Biofilm Performance of Three Natural Products against Initial Bacterial Attachment

Salta

Wharton

Dennington

et al. 2013

IJMS

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Marine bacteria contribute significantly towards the fouling consortium, both directly (modern foul release coatings fail to prevent “slime” attachment) and indirectly (biofilms often excrete chemical cues that attract macrofouling settlement). This study assessed the natural product anti-biofilm performance of an extract of the seaweed, Chondrus crispus, and two isolated compounds from terrestrial sources, (+)-usnic acid and juglone, against two marine biofilm forming bacteria, Cobetia marina and Marinobacter hydrocarbonoclasticus. Bioassays were developed using quantitative imaging and fluorescent labelling to test the natural products over a range of concentrations against initial bacterial attachment. All natural products affected bacterial attachment; however, juglone demonstrated the best anti-biofilm performance against both bacterial species at a concentration range between 5–20 ppm. In addition, for the first time, a dose-dependent inhibition (hormetic) response was observed for natural products against marine biofilm forming bacteria.

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Section: Resultsmentioning

confidence: 99%

Anti-Biofilm Performance of Three Natural Products against Initial Bacterial Attachment

Salta

Wharton

Dennington

et al. 2013

IJMS

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“…Tsai () investigated the impact of flow velocity on the dynamic behaviour of biofilm bacteria and found that maximum biofilm biomass did not change when flow velocity was increased from 0.38 to 0.77 knots, but was significantly affected when flow velocity was further increased to 1.16 knots. Evidence is emerging that multispecies communities that develop under high shear stress are less diverse than those that have developed at lower shear stress (reviewed by Howell, ). Rochex and colleagues () assessed the effect of shear stress (0.055–0.27 Pa) on biofilm diversity using the Polymerase Chain Reaction (PCR)‐single‐strand conformation polymorphism fingerprinting method and concluded that shear stress affected biofilm composition.…”

Section: Impact Of Local Environment On Biofilmsmentioning

confidence: 99%

“…The economic impact of hull biofouling has been examined by Schultz and colleagues () who showed that the primary cost associated with fouling was due to increased fuel consumption linked to frictional drag (estimated to be $56 million per year for the entire class of DDG‐51 naval ships). Several papers have described the effect of biofilms on the hydrodynamic performance of ship hull surfaces (reviewed by Howell, ). For instance, Schultz, Swain and colleagues (Schultz and Swain , ; Schultz, ; Schultz et al ., ) observed penalties in local skin friction coefficients of between 33% and 187% on flat plates fouled with biofilms.…”

Section: Introductionmentioning

confidence: 99%

Marine biofilms on artificial surfaces: structure and dynamics

Salta

Wharton

Blache

et al. 2013

Environmental Microbiology

373

282

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SummaryThe 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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“…The development of such biofilms in turn depends on the types of microbes present and environmental conditions (Yebra et al 2006b). Different microbes also have different dimensions and differential growth rates, which affect the drag and shear stress of the biofilmed biocidal coatings (Howell 2009). Microbial fouling communities consist mainly of numerous species of bacteria and diatoms that can positively and/or negatively interact with each other (Railkin 2003;Dobretsov 2010;Salta et al 2013;Mieszkin et al 2013) and significantly enhance or inhibit the settlement of invertebrate larvae and algal spores (Mitchell & Maki 1988;Maki 2002;Huang & Hadfield 2003;Qian et al 2007;Hadfield 2011).…”

Section: Introductionmentioning

confidence: 99%

Long-term microfouling on commercial biocidal fouling control coatings

et al. 2014

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The current study investigated the microbial community composition of the biofilms that developed on 11 commercial biocidal coatings, including examples of the three main historic types, namely self-polishing copolymer (SPC), self-polishing hybrid (SPH) and controlled depletion polymer (CDP), after immersion in the sea for one year. The total wet weight of the biofilm and the total bacterial density were significantly influenced by all coatings. Pyrosequencing of 16S rRNA genes revealed distinct bacterial community structures on the different types of coatings. Flavobacteria accounted for the dissimilarity between communities developed on the control and SPC (16%) and the control and SPH coatings (17%), while Alphaproteobacteria contributed to 14% of the dissimilarity between the control and CDP coatings. The lowest number of operational taxonomic units was found on Intersmooth 100, while the lowest biomass and density of bacteria was detected on other SPC coatings. The experiments demonstrated that the nature and quantity of biofilm present differed from coating to coating with clear differences between copper-free and copper-based biocidal coatings.

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Testing the impact of biofilms on the performance of marine antifouling coatings

Cited by 6 publications

References 55 publications

Anti-Biofilm Performance of Three Natural Products against Initial Bacterial Attachment

Anti-Biofilm Performance of Three Natural Products against Initial Bacterial Attachment

Marine biofilms on artificial surfaces: structure and dynamics

Long-term microfouling on commercial biocidal fouling control coatings

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