Antifouling activities of methanolic extracts of three macroalgal species from the Red Sea

Salama, A.; Satheesh, Sathianeson; Balqadi, Ahmed A.

doi:10.1007/s10811-017-1345-6

Cited by 23 publications

(10 citation statements)

References 65 publications

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“…Macroalgae also show antifouling defence by different ways such as the use of chemical and physical defences (Burns et al 2003;da Gama et al 2014) or symbiotic relationships between epibionts (e.g., bacteria) (Satheesh et al 2016). Due to these chemical defence, macroalgae are one of the most important groups for natural product antifouling research (Nylund et al 2007;Hellio et al 2009;Viano et al 2009;Saha and Wahl 2013;Othmani et al 2016;Carvalho et al 2017;Salama et al 2017).…”

Section: Discussionmentioning

confidence: 99%

Antimicrofouling activities of marine macroalga Dictyota dichotoma from the Red Sea

Gadhi

El‐Sherbiny

Al-Sofynai

et al. 2019

Jour. Agri. & Mar. Scie.

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Introduction. Marine organisms produce a variety of secondary metabolites mainly for achieving the defence against the competitors and predators. These compounds could be used as natural product antifoulants for the management of biofouling growth on marine structures. Objectives. To understand the antifouling defence strategies of marine macroalgae collected from the Red Sea. Methodology. The macroalga Dictyota dichotoma was collected from the Obhur Creek of Red Sea, Saudi Arabia and extracted using methanol. Surface and total extraction methods were performed and tested against a bacterial strain isolated from the microfouling assemblage. Results. The extracts obtained from the macroalgal samples have strong antibacterial and antibiofilm activities against the bacterial strain isolated from the marine microfouling assemblage. The total extracts showed strong bacterial growth inhibitory activities in culture plate method. In microtitre plate assay, surface extract showed strong biofilm inhibitory activity. GC-MS analysis indicated considerable variations in the metabolic profile of the surface and total extracts. Conclusion. This study revealed the importance of surface-associated compounds in antifouling defence mechanism of the marine macroalgae.

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Section: Discussionmentioning

confidence: 99%

Antimicrofouling activities of marine macroalga Dictyota dichotoma from the Red Sea

Gadhi

El‐Sherbiny

Al-Sofynai

et al. 2019

Jour. Agri. & Mar. Scie.

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“…Analyses showed that the crude extracts contained fatty acids, their derivatives phytosterols and terpenoids, and some other compounds. The results from this study indicate that crude algal extracts could be used as natural anti-fouling compounds in anti-fouling paints, although toxicity testing of these crude extracts is necessary (Salama et al, 2018).…”

Section: Examples Of Seaweeds Anti-fouling Compoundsmentioning

confidence: 91%

“…Different researchers have shown the anti-fouling properties of compounds extracted from a wide variety of seaweeds. Salama et al (2018) studied the anti-fouling activity of extracts of three macro algal species, Chaetomorpha linum, Turbinaria ornata, and Sargassum polycystum, against barnacle larvae in both a laboratory assay using Petri dishes and in a field study by mixing the crude seaweeds extracts with varnish, coating nylon net panels and hanging them for 3 months submerged in the Red sea. All three methanol extracts inhibited the settlement of cypris larvae in the laboratory study.…”

Section: Examples Of Seaweeds Anti-fouling Compoundsmentioning

confidence: 99%

Inventory of potential new anti-fouling strategies inspired by nature

Foekema¹,

Asjes²,

Boomgaard³

2019

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As part of the Dutch Top consortia for Knowledge and Innovation (TKI) project 'Re-Drag with Nature' an inventory was made of the strategies that sea weeds apply to reduce the settlement and development of fouling organisms on their surface. This inventory was made based upon available literature and the results were assessed for their potency to protect man-made structures against biofouling. The reason for the focus on seaweeds was initiated by the observations that fouling pressure on seaweeds is in general low, and further supported by the knowledge that a lot of effort is currently being made to cultivate seaweeds and to utilise the compounds that can be extracted from it. However, the inventory was not fully limited to seaweeds. Where it inspired the thinking of new alternatives these were also briefly assessed. Seaweeds make use of physical and chemical strategies to keep their surface free of biofouling organisms. The physical strategies are based on the continuous renewal of surface material and are, therefore, not considered applicable to protect man-made structures without continuous maintenance. Self-polishing coatings are available for ship hulls, but these are only effective in combination with biocides. An alternative physical process that is not applied by seaweeds, but that may have the potency to reduce fouling is a combination of flow velocity and surface structure that could prevent early stages of fouling organisms from attaching to a surface. As this requires a controlled environment, it is not applicable to ship hulls or maritime infrastructure. It could work in industrial cooling water systems, but as the current methods that are applied there seem to fulfil the needs of the industry, this option was not further investigated. The chemical anti-fouling strategies of seaweeds are based on the production of a broad range of metabolites with the potential to reduce settlement and/or development of fouling organisms. Although the effectiveness of several of these metabolites has been shown on experimental scale, commercial application of bio-based compounds for anti-fouling purposes does not seem attractive, due to the high costs that are related with legislation/registration procedures for new chemicals. Apart from producing anti-fouling metabolites themselves, seaweeds can also support specific microbes that have little or no negative impact on their condition, but that prevent the settlement of more harmful species. A similar strategy, where a fouling species with low negative impact is favoured and supported, can have potential to manage fouling in an environmental friendly way on man-made surfaces where some drag is acceptable. As far as we are aware this is a completely new approach to deal with biofouling. When writing this report a proposal for a joint industry project (JIP) is being prepared that aims to investigate the potency of this approach to manage bio-fouling on offshore infrastructure.

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“…Conventional biocides and antifouling paints used for antifouling carry a heavy environmental impact, including bioaccumulation of organotins and copper in marine mammals and other marine life ( 112 , 113 ). Biomimetic approaches to address these issues have focused in particular on the natural coatings and compounds produced by marine organisms ( 108 , 114 , 115 ), including ascidians ( 116 ), macroalgae, ( 117 ) algal compounds ( 118 ), marine bacteria ( 119 , 120 ), and sponges, presumably in an effort to avoid biofouling themselves ( 121 ). Another rich source of inspiration has been the development of biomimetic surfaces based on the microtopography of marine organisms that function as natural antifoulants ( 115 ), including common marine shells, ( 122 ) crustaceans ( 123 ), seaweed ( 124 ), and sharkskin ( 125 , 126 ).…”

Section: Biomimetic Design Inspired By Marine Lifementioning

confidence: 99%

A forgotten element of the blue economy: marine biomimetics and inspiration from the deep sea

et al. 2022

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The morphology, physiology and behavior of marine organisms have been a valuable source of inspiration for solving conceptual and design problems. Here, we introduce this rich and rapidly expanding field of marine biomimetics, and identify it as a poorly articulated and often overlooked element of the ocean economy associated with substantial monetary benefits. We showcase innovations across seven broad categories of marine biomimetic design (adhesion, antifouling, armor, buoyancy, movement, sensory, stealth), and use this framing as context for a closer consideration of the increasingly frequent focus on deep-sea life as an inspiration for biomimetic design. We contend that marine biomimetics is not only a “forgotten” sector of the ocean economy, but has the potential to drive appreciation of non-monetary values, conservation and stewardship, making it well-aligned with notions of a sustainable blue economy. We note, however, that the highest ambitions for a blue economy are that it not only drives sustainability, but also greater equity and inclusivity, and conclude by articulating challenges and considerations for bringing marine biomimetics onto this trajectory.

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Antifouling activities of methanolic extracts of three macroalgal species from the Red Sea

Cited by 23 publications

References 65 publications

Antimicrofouling activities of marine macroalga Dictyota dichotoma from the Red Sea

Antimicrofouling activities of marine macroalga Dictyota dichotoma from the Red Sea

Inventory of potential new anti-fouling strategies inspired by nature

A forgotten element of the blue economy: marine biomimetics and inspiration from the deep sea

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