Diatom communities on commercial biocidal fouling control coatings after one year of immersion in the marine environment

Muthukrishnan, T. S.; Dobretsov, Sergey; Stefano, Mario De; Abed, Raeid M. M.; Kidd, Barry; Finnie, Alistair A.

doi:10.1016/j.marenvres.2017.05.001

Cited by 19 publications

(11 citation statements)

References 61 publications

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“…The presence of Haslea sp. did not seem to be modulated by the application of the anti-corrosion paint (which was not reported as a biocide), differently from previous studies in which biocidal anti-fouling coatings significantly inhibited the settlement of certain genera of diatoms (Camps et al, 2014;Muthukrishnan et al, 2017). During winter, there was a high abundance of the phototrophic, calcareous dinoflagellate Thoracosphaera among all the chloroplast sequences, and a much lower abundance of diatom colonization when compared to spring (Figure 6).…”

Section: Detection Of Possible Pathogenic Species and Identification contrasting

confidence: 72%

“…Diatoms are key members of biofilm communities as they are the main microphytobenthic group in marine epipelagic zones, especially in temperate areas (Cassé and Swain, 2006;Hunsucker et al, 2014). Diatoms colonizing surfaces are believed to have relative low diversity and only species from about 8-10 genera have commonly been documented to be problematic biofoulers of the 'niche' habitats provided by modern antifouling and fouling-release coatings (Molino and Wetherbee, 2008), most of them being pennate diatoms (Mitbavkar and Anil, 2008;Zargiel et al, 2011;Muthukrishnan et al, 2017). Some past studies did not show any major differences on the colonization rates on the tested artificial surfaces both on temperate and tropical locations after 2 weeks of submersion (Molino et al, 2009) and diatom colonization of tested surfaces did not present any clear temporal patterns (Patil and Anil, 2005;Elifantz et al, 2013).…”

Section: Detection Of Possible Pathogenic Species and Identification mentioning

confidence: 99%

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Distinct Temporal Succession of Bacterial Communities in Early Marine Biofilms in a Portuguese Atlantic Port

et al. 2020

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Marine biofilms are known to influence the corrosion of metal surfaces in the marine environment. Despite some recent research, the succession of bacterial communities colonizing artificial surfaces remains uncharacterized in some temporal settings. More specifically, it is not fully known if bacterial colonizers of artificial surfaces are similar or distinct in the different seasons of the year. In particular the study of early biofilms, in which the bacterial cells communities first adhere to artificial surfaces, are crucial for the development of the subsequent biofilm communities. In this work, we used amplicon-based NGS (next-generation sequencing) and universal 16S rRNA bacterial primers to characterize the early biofilm bacterial communities growing on 316 L stainless steel surfaces in a Northern Portugal port. Sampling spanned 30-day periods in two distinct seasons (spring and winter). Biofilm communities growing in steel surfaces covered with an anti-corrosion paint and planktonic communities from the same location were also characterized. Our results demonstrated that distinct temporal patterns were observed in the sampled seasons. Specifically, a significantly higher abundance of Gammaproteobacteria and Mollicutes was found on the first days of biofilm growth in spring (day 1 to day 4) and a higher abundance of Alphaproteobacteria during the same days of biofilm growth in winter. In the last sampled day (day 30), the spring biofilms significantly shifted toward a dominance of photoautotrophic groups (mostly diatoms) and were also colonized by some macrofouling communities, something not observed during the winter sampling. Our results revealed that bacterial composition in the biofilms was particularly affected by the sampled day of the specific season, more so than the overall effect of the season or overall sampling day of both seasons. Additionally, the application of a non-fouling-release anti-corrosion paint in the steel plates resulted in a significantly lower diversity compared with plates without paint, but this was only observed during spring. We suggest that temporal succession of marine biofilm communities should be taken in consideration for future antifouling/anti-biofilm applications.

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Section: Detection Of Possible Pathogenic Species and Identification contrasting

confidence: 72%

Section: Detection Of Possible Pathogenic Species and Identification mentioning

confidence: 99%

Distinct Temporal Succession of Bacterial Communities in Early Marine Biofilms in a Portuguese Atlantic Port

et al. 2020

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“…Although biocidal coatings still dominate the market, accounting for more than 90% of coating sales (Muthukrishnan et al 2017), concerns over the environmental impact of antifouling biocides have control (Gittens et al 2013). Foul-release coatings, the commercial development of which did not take off until after the first bans on TBT-based coatings (Yebra et al 2004), rely on the modification of surface physical and chemical properties to both minimise adhesion of organisms and facilitate their removal by water flow (Finnie and Williams 2010; Bixler and Bhushan 2012).…”

Section: Introductionmentioning

confidence: 99%

Comparative study of biofilm formation on biocidal antifouling and fouling-release coatings using next-generation DNA sequencing

et al. 2018

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The bacterial and eukaryotic communities forming biofilms on six different antifouling coatings, three biocidal and three fouling-release, on boards statically submerged in a marine environment were studied using next-generation sequencing. Sequenced amplicons of bacterial 16S ribosomal DNA and eukaryotic ribosomal DNA internal transcribed spacer were assigned taxonomy by comparison to reference databases and relative abundances were calculated. Differences in species composition, bacterial and eukaryotic, and relative abundance were observed between the biofilms on the various coatings; the main difference was between coating type, biocidal compared to fouling-release. Species composition and relative abundance also changed through time. Thus, it was possible to group replicate samples by coating and time point, indicating that there are fundamental and reproducible differences in biofilms assemblages. The routine use of next-generation sequencing to assess biofilm formation will allow evaluation of the efficacy of various commercial coatings and the identification of targets for novel formulations.

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“…The most common diatom genera found in these biofilms were Navicula , Cocconeis , and Amphora . Previous studies have suggested that these genera of diatoms were frequently found on antifouling coatings [ 46 , 47 ]. Since no apparent differences (ANOVA, HSD, p > 0.05) were exhibited between the densities of the diatoms on the tested coatings in the dark ( Figure 7 a), we can assume that neither the physical properties (such as WCA) nor the chemical compositions of different coatings affect the antifouling performance of coatings in the dark.…”

Section: Resultsmentioning

confidence: 99%

Chitosan Nanocomposite Coatings Containing Chemically Resistant ZnO–SnOx Core–shell Nanoparticles for Photocatalytic Antifouling

Kumar

Mazinani

et al. 2021

IJMS

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Functional nanocomposites with biopolymers and zinc oxide (ZnO) nanoparticles is an emerging application of photocatalysis in antifouling coatings. The reduced chemical stability of ZnO in the acidic media in which chitosan is soluble affects the performance of chitosan nanocomposites in antifouling applications. In this study, a thin shell of amorphous tin dioxide (SnOx) was grown on the surface of ZnO to form ZnO–SnOx core–shell nanoparticles that improved the chemical stability of the photocatalyst nanoparticles, as examined at pH 3 and 6. The photocatalytic activity of ZnO–SnOx in the degradation of methylene blue (MB) dye under visible light showed a higher efficiency than that of ZnO nanoparticles due to the passivation of electronic defects. Chitosan-based antifouling coatings with varying percentages of ZnO or ZnO–SnOx nanoparticles, with or without the glutaraldehyde (GA) crosslinking of chitosan, were developed and studied. The incorporation of photocatalysts into the chitosan matrix enhanced the thermal stability of the coatings. Through a mesocosm study using running natural seawater, it was found that chitosan/ZnO–SnOx/GA coatings enabled better inhibition of bacterial growth compared to chitosan coatings alone. This study demonstrates the antifouling potential of chitosan nanocomposite coatings containing core–shell nanoparticles as an effective solution for the prevention of biofouling.

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Diatom communities on commercial biocidal fouling control coatings after one year of immersion in the marine environment

Cited by 19 publications

References 61 publications

Distinct Temporal Succession of Bacterial Communities in Early Marine Biofilms in a Portuguese Atlantic Port

Distinct Temporal Succession of Bacterial Communities in Early Marine Biofilms in a Portuguese Atlantic Port

Comparative study of biofilm formation on biocidal antifouling and fouling-release coatings using next-generation DNA sequencing

Chitosan Nanocomposite Coatings Containing Chemically Resistant ZnO–SnOx Core–shell Nanoparticles for Photocatalytic Antifouling

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