Variations in microbial community on different materials in Sanya Marine Environment Experimental Station, China.

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Date: June 2022
From: Canadian Journal of Microbiology(Vol. 68, Issue 6)
Publisher: NRC Research Press
Document Type: Report
Length: 5,228 words
Lexile Measure: 1320L

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Abstract :

Marine biofouling occurs through the colonization of undesired microorganisms on the surfaces of structures. In this study, four immersion cycles (2, 5,15, and 25 days) of total immersion in seawater were carried out at the Sanya Marine Environmental Test Station using three materials: industrial pure titanium (Ti), hot-dip zinc (Zn), and glass slide (GS). Three phyla, four classes, and nine bacterial genera were identified. The dominant genera were Pseudomonas, Alteromonas, and Pseudoalteromonas. The number of bacteria increased with soaking time. Sixty-one species of diatoms belonging to 30 genera, 24 families, and 16 orders were detected, among which the dominant genera were Amphora, Nitzschia, and Navicula. Four genera of ciliates belonged to two classes, three orders, and four families, among which the dominant species were Euplotes sp. and Uronema marinum. Tubular polychaetes was the dominant metazoans. Species diversity increased over time. The highest biofilm diversity was observed on the GS surface. The diversity of biofilms on the Ti surface was higher than that on the Zn surface. This study provides basic data for marine material research, marine corrosion, and national defence construction. Key words: marine bacteria, diatoms, ciliates, communities, microbiofilms. L'encrassement biologique marin se produit avec la colonisation de micro-organismes indesirables sur la surface de structures. Dans cette etude, quatre cycles d'immersion totale (2, 5,15 et 25 jours) dans l'eau de mer ont ete effectues a la station d'essai environnementale marine de Sanya en utilisant trois materiaux : le titane (Ti) pur industriel, le zinc (Zn) trempe a chaud et la lame de verre (LV). Trois phylums, quatre classes et neuf genres de bacteries ont ete detectes. Les genres dominants consistaient en Pseudomonas, Alteromonas et Pseudoalteromonas. Le nombre de bacteries croissait en fonction du temps de trempage. Soixante et une especes de diatomees appartenant a 30 genres, 24 familles et 16 ordres ont ete detectees, parmi lesquelles les genres dominants appartenaient a Amphora, Nitzschia et Navicula. On observait quatre genres de cilies appartenant a deux classes, trois ordres et quatre familles, parmi lesquels les especes Euplotes sp. et Uronema marinum etaient dominantes. Les polychetes tubulaires etaient les metazoaires dominants. La diversite des especes augmente en fonction du temps. La plus grande diversite du biofilm s'observait sur LV. La diversite du biofilm sur le Ti etait plus elevee que sur la plaque de Zn. Cette etude fournit des donnees de base pour la recherche sur les materiaux marins, la corrosion marine et la construction pour la defense nationale. [Traduit par la Redaction]. Mots-cles : bacteries marines, diatomees, cilies, communautes, microbiofilms.

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Gale Document Number: GALE|A706322312