Seasonal variation in the biological succession of marine diatoms over 316L stainless steel in a coastal environment of Chile.

IF 2.6 3区生物学 Q3 BIOTECHNOLOGY & APPLIED MICROBIOLOGY Biofouling Pub Date : 2024-01-01 Epub Date: 2024-01-12 DOI:10.1080/08927014.2023.2300150

Leslie K Daille, John R Spear, Iwona Beech, Ignacio T Vargas, Rodrigo De la Iglesia

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Abstract

Characterizing seasonal changes in diatom community profiles in coastal environments is scarce worldwide. Despite diatoms being prevalent in microfouling, their role in microbially influenced corrosion of metallic materials remains poorly understood. This study reports the effect of seasonal variations on the settlement of marine diatoms and corrosion of 316 L stainless steel surfaces exposed to Chilean coastal seawater. Electron microscopy imaging revealed a diverse assembly of diatoms, exhibiting pronounced differences at genus level between summer and winter seasons, with a significant delay in diatom settlement during winter. Electrochemical measurements indicated an active role of diatoms in increasing corrosion current during biofilm development. While the final diatom composition was similar irrespective of the season, the analyses of diatom assemblages over time differed, showing faster colonization when silicate and nitrate were available. This study lays the foundation for future research on the dominant season-specific genera of diatoms to unveil the microbial interactions that could contribute to corrosion and to evaluate their potential as bioindicators for alternative surveillance strategies.

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智利沿海环境中 316L 不锈钢上海洋硅藻生物演替的季节性变化。

在全球范围内，对沿海环境中硅藻群落特征的季节性变化进行描述的研究很少。尽管硅藻在微污损中很普遍，但它们在微生物影响的金属材料腐蚀中的作用仍鲜为人知。本研究报告了季节变化对海洋硅藻沉降和暴露在智利沿海海水中的 316 L 不锈钢表面腐蚀的影响。电子显微镜成像显示硅藻的组合多种多样，夏季和冬季硅藻属的差异明显，冬季硅藻沉降明显延迟。电化学测量结果表明，在生物膜形成过程中，硅藻在增加腐蚀电流方面发挥了积极作用。虽然硅藻的最终组成与季节无关，但硅藻组合的分析结果随时间的变化而不同，显示在硅酸盐和硝酸盐含量较高时，硅藻的定殖速度更快。这项研究为今后研究特定季节的主要硅藻属奠定了基础，以揭示可能导致腐蚀的微生物相互作用，并评估它们作为替代监控策略的生物指标的潜力。

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来源期刊

Biofouling 生物-海洋与淡水生物学

CiteScore

5.00

自引率

7.40%

发文量

审稿时长

1.7 months

期刊介绍： Biofouling is an international, peer-reviewed, multi-discliplinary journal which publishes original articles and mini-reviews and provides a forum for publication of pure and applied work on protein, microbial, fungal, plant and animal fouling and its control, as well as studies of all kinds on biofilms and bioadhesion. Papers may be based on studies relating to characterisation, attachment, growth and control on any natural (living) or man-made surface in the freshwater, marine or aerial environments, including fouling, biofilms and bioadhesion in the medical, dental, and industrial context. Specific areas of interest include antifouling technologies and coatings including transmission of invasive species, antimicrobial agents, biological interfaces, biomaterials, microbiologically influenced corrosion, membrane biofouling, food industry biofilms, biofilm based diseases and indwelling biomedical devices as substrata for fouling and biofilm growth, including papers based on clinically-relevant work using models that mimic the realistic environment in which they are intended to be used.