Assessing Efficacy of “Eco-Friendly” and Traditional Copper-Based Antifouling Materials in a Highly Wave-Exposed Environment

Arboleda-Baena, Clara; Osiadacz, Nicole; Parragué, Mirtala; González, Andrés E.; Fernández, Miriam; Finke, Gerhard R.; Navarrete, Sergio A.

doi:10.3390/jmse11010217

Cited by 4 publications

(3 citation statements)

References 59 publications

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“…These results are crucial for distinguishing the strength of interactions among specific microbial taxonomic units and gaining a better understanding of the connections between the macroscopic and microscopic world. Our results contribute to enhancing our understanding of the complex interactions between microorganisms and macroorganisms in marine systems, particularly in relation to biofouling (Callow and Callow 2011, Navarrete et al 2019) and the effective control of such processes (Navarrete et al 2020, Arboleda-Baena et al 2023a).…”

Section: Discussionmentioning

confidence: 82%

Unifying microorganisms and macrograzers in rocky shore ecological networks

Arboleda-Baena,

Pareja,

Poblete

et al. 2023

Preprint

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Over the past decades, our understanding of the vital role microbes play in ecosystem processes has greatly expanded. However, we still have limited knowledge about how microbial communities interact with larger organisms. Many existing representations of microbial interactions are based on co-occurrence patterns, which do not provide clear insights into trophic or non-trophic relationships. In this study, we untangled trophic and non-trophic interactions between macroscopic and microscopic organisms on a marine rocky shore. Five abundant mollusk grazers were selected, and their consumptive (grazing) and non-consumptive (grazer pedal mucus) interactions with bacteria in biofilms were measured using 16S rRNA amplicon sequencing. While no significant effects on a commonly used measure of biofilm grazing (Chlorophyll-a concentration) were observed, detailed image analysis revealed that all grazers had a detrimental impact on biofilm cover. Moreover, different grazers exhibited distinct effects on various bacterial groups. Some groups, such as Rhodobacteraceae, Saprospiraceae, Flavobacteriaceae, and Halieaceae, experienced positive effects from specific grazers, while others, like Rhizobiaceae, Rhodobacteraceae, and Flavobacteriaceae were negatively affected by certain grazers. This study presents the first attempt to construct an interaction network between macroorganisms and bacteria. It demonstrates that the strength of trophic and non-trophic interactions varies significantly depending on the mollusk grazer or bacterial group involved. Notably, certain bacterial groups exhibited a generalized response, while others showed specialized responses to specific macroorganisms in trophic or non-trophic interactions. Overall, this work highlights the potential for integrating microbes into ecological networks, providing valuable insights and methodologies for quantifying interactions across Domains. This research complements the previous ecological network, showing that mollusk grazers interact not only trophically but also non-trophically with epilithic biofilms. It identifies three drivers affecting microbial community assembly, crucial for understanding macro-microorganism dynamics in intertidal systems.

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Section: Discussionmentioning

confidence: 82%

Unifying microorganisms and macrograzers in rocky shore ecological networks

Arboleda-Baena,

Pareja,

Poblete

et al. 2023

Preprint

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“…Most knowledge about biofouling and the performance of antifouling coatings has been conducted in the laboratory or in situ , in wave-protected habitats, usually in bays and port harbors. One of the main drawbacks related to in situ tests is the scarcity of studies performed under high-energy environmental conditions, such as under moderate and strong wave and current activity, due to logistical and safety-related difficulties in conducting detailed observations [ 153 , 154 , 155 ]. Since these high wave-energy regions of coastal oceans are becoming increasingly targeted as areas of human activity, such as aquaculture, and as a source of renewable energy, it is critical to improve knowledge about biofouling risks in these environments, as well as the evaluation of novel antifouling surfaces that can be used in the material design of relevant industrial equipment.…”

Section: Marine Antifouling Strategiesmentioning

confidence: 99%

Development of Antifouling Strategies for Marine Applications

Romeu

Mergulhão

2023

Microorganisms

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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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“…EEUU, Cleveland, OH, USA) [4]. Despite their effectiveness, concerns have arisen regarding antifouling paints based on copper compounds due to their potential release in real aquatic conditions, accumulation, and toxicity to marine species [5,6].…”

Section: Introductionmentioning

confidence: 99%

Eco-Friendly Sol–Gel Coatings as Microfouling Barrier for Marine Applications

Diaz Jalaff,

Ortega Cancino,

Altavilla

et al. 2023

Coatings

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Biofouling poses a significant challenge to the marine industry, resulting from the undesirable accumulation of various living organisms, including microorganisms, plants, shellfish, and others, on different surfaces submerged in seawater. The primary approach to address this issue involves the application of antifouling coatings, often incorporating active agents whose environmental impact has raised considerable concerns. In this article, we compare the effects of two natural and environmentally friendly antimicrobial compounds, capsaicin (CP) and Cinnamomum cassia oil (CO), when incorporated into hybrid sol–gel coatings. We tested formulations containing 4% and 8% by weight of each biocide for coating nylon substrates through immersion. This process yielded colorless, uniform surfaces with minimal defects and strong adhesion. We evaluated the antibacterial properties of the pure organic biocides against five bacterial strains commonly found in Chilean microfouling. Both compounds exhibited similar behavior against Gram-positive bacteria, but CP showed 2–5 times greater efficacy than CO against Gram-negative strains. Subsequently, we selected a Gram-negative strain for antibacterial tests on sol–gel/biocide samples. The results indicated that coatings with CP incorporation outperformed those with CO, achieving an efficiency of 99.9%. Lastly, leaching tests demonstrated that coatings with lower biocide concentrations (4%) exhibited a steady and gradual release of organic molecules, with sol–gel/CP 4% emerging as the most promising microfouling barrier coating for marine applications.

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Assessing Efficacy of “Eco-Friendly” and Traditional Copper-Based Antifouling Materials in a Highly Wave-Exposed Environment

Cited by 4 publications

References 59 publications

Unifying microorganisms and macrograzers in rocky shore ecological networks

Unifying microorganisms and macrograzers in rocky shore ecological networks

Development of Antifouling Strategies for Marine Applications

Eco-Friendly Sol–Gel Coatings as Microfouling Barrier for Marine Applications

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