Chemical control of epibiosis by Hong Kong sponges

The effect of sponge extracts on micro- and macrofouling communities

Sergey Dobretsov, Hans Uwe Dahms, Mandy Y. Tsoi, Pei Yuan Qian

Research output: Contribution to journalArticle

30 Citations (Scopus)

Abstract

The relationship between antifouling metabolite production and epibiosis on the surfaces of the sponges Haliclona cymaeformis, Haliclona sp. and Callyspongia sp. was investigated in this study. Densities of macrofoulers and diatoms were suppressed on the surfaces of all examined sponges, while densities of bacteria on the surfaces of H. cymaeformis and Callyspongia sp. were similar to those on the reference surfaces and were more than double the densities of bacteria on the surfaces of Haliclona sp. compared with a reference surface. Bray-Curtis similarity matrices of the tRFLP (terminal restriction fragment length polymorphism) analysis of PCR-amplified bacterial 16S rRNA genes obtained from the surfaces of the sponges demonstrated that the bacterial communities on the sponge surfaces were different from each other and from those on the reference surfaces. In field experiments, both methanol and dichloromethane extracts from all tested sponges incorporated in a Phytagel matrix inhibited recruitment of diatoms, algae and invertebrates, but extracts of only 2 sponges deterred bacterial film development. The tRFLP analysis revealed that the sponge extracts decreased diversity in the bacterial community. Strong negative effects of the sponge extracts on the Shannon-Wiener diversity values, as well as the species-richness values of the diatom community were found. ANOSIM (analysis of similarity) and SIMPER (similarity percentage) analyses demonstrated that the type and species specificity of the extracts affected the diatom composition. Results suggest that metabolites of sponges can control recruitment of propagules, change the composition of micro- and macrofouling communities and, in this way, regulate epibiosis on sponge surfaces.

Original languageEnglish
Pages (from-to)119-129
Number of pages11
JournalMarine Ecology Progress Series
Volume297
Publication statusPublished - Aug 1 2005

Fingerprint

epibiosis
chemical control
Porifera
sponge
China
extracts
Bacillariophyceae
diatom
bacterial communities
algae
metabolite
restriction fragment length polymorphism
polymorphism
effect
metabolites
bacterium
matrix
antifouling
bacteria
methylene chloride

Keywords

  • Bacteria
  • Chemical defense
  • Diatoms
  • Epibiosis
  • Macrofouling community
  • Microfouling community
  • Secondary metabolites
  • Sponge

ASJC Scopus subject areas

  • Aquatic Science
  • Ecology

Cite this

Chemical control of epibiosis by Hong Kong sponges : The effect of sponge extracts on micro- and macrofouling communities. / Dobretsov, Sergey; Dahms, Hans Uwe; Tsoi, Mandy Y.; Qian, Pei Yuan.

In: Marine Ecology Progress Series, Vol. 297, 01.08.2005, p. 119-129.

Research output: Contribution to journalArticle

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