Effects of hypoxia on biofilms and subsequently larval settlement of benthic invertebrates

S. G. Cheung, C. Y.S. Chan, B. H.K. Po, A. L. Li, J. Y.S. Leung, Jianwen QIU, P. O. Ang, V. Thiyagarajan, P. K.S. Shin, Man Ying CHIU*

*Corresponding author for this work

Research output: Contribution to journalJournal articlepeer-review

10 Citations (Scopus)

Abstract

Biofilms on submerged surfaces are important in determining larval settlement of most marine benthic invertebrates. We investigated if exposure of biofilms to hypoxia would alter the larval settlement pattern and result in a shift in benthic invertebrate community structure in the field. Biofilms were first exposed to hypoxia or normoxia in laboratory microcosms for 7. days, and then deployed in the field for another 7. days to allow for larval settlement and recruitment to occur. Using terminal-restriction fragment length polymorphism of the 16S rRNA gene, this study showed that hypoxia altered the biofilm bacterial community composition, and the difference between the hypoxic and normoxic treatments increased with the time of exposure period. This study also demonstrated significantly different benthic invertebrate community structures as a result of biofilm exposure to hypoxia and that the hypoxic and normoxic treatments were dominated by Hydroides sp. and Folliculina sp., respectively.

Original languageEnglish
Pages (from-to)418-424
Number of pages7
JournalMarine Pollution Bulletin
Volume85
Issue number2
DOIs
Publication statusPublished - 30 Aug 2014

Scopus Subject Areas

  • Oceanography
  • Aquatic Science
  • Pollution

User-Defined Keywords

  • Dissolved oxygen
  • Larval settlement

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