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

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

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Little is known about the effect of commercial biocidal fouling control coatings on fouling diatom communities and their growth forms after long periods of exposure in the marine tropical environment. The current study investigated the abundance and composition of fouling diatom communities developed on 11 commercially available biocidal antifouling coatings, covering the three main technology types in recent historic use (Self-Polishing Copolymers, Self-Polishing Hybrid and Controlled Depletion Polymers) after one year of static immersion at two locations in Muscat, Oman (Marina Shangri La and Marina Bandar Rowdha). Light microscopy demonstrated that the total abundance of diatoms and the relative abundance of growth forms were significantly affected by the choice of biocidal antifouling coating and experimental location. Using scanning electron microscopy, a total of 21 diatom genera were identified which were grouped into adnate, motile, plocon and erect growth forms. The adnate growth forms, mainly the genera Amphora, Cocconeis and Mastogloia, dominated the other growth forms in terms of their relative abundance. Current results revealed the importance of exposure location and choice of biocidal antifouling coating on the relative abundance of diatom growth forms.

Original languageEnglish
Pages (from-to)102-112
Number of pages11
JournalMarine Environmental Research
Volume129
DOIs
Publication statusPublished - 2017

Keywords

  • Biocidal antifouling coatings
  • Biocides
  • Biofilms
  • Diatom communities
  • Growth forms
  • Microscopy

ASJC Scopus subject areas

  • Oceanography
  • Aquatic Science
  • Pollution

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