Marine Biology

, Volume 49, Issue 2, pp 177–185

Microbial associations in sponges. III. Ultrastructure of the in situ associations in coral reef sponges

  • C. R. Wilkinson

DOI: 10.1007/BF00387117

Cite this article as:
Wilkinson, C.R. Mar. Biol. (1978) 49: 177. doi:10.1007/BF00387117


Symbiotic cyanobacteria are associated with marine sponges in three ways: the majority are free-living in the mesohyl; large aggregates occur in “cyanocytes” (specialized, vacuolated archeocytes); and few are present in digestive vacuoles. The cyanobacteria in Jaspis stellifera and Neofibularia irata are morphologically similar to those described in Mediterranean sponges, whereas those in Pericharax heteroraphis are different. The freeliving bacterial populations are morphologically similar, although the number of bacteria varies between the species. The fourth sponge Ircinia wistarii contains a mixed bacterial population unlike those in the other sponges. Sponge digestion of microbial associates is rare and not considered to contribute significant nutrients.

Copyright information

© Springer-Verlag 1978

Authors and Affiliations

  • C. R. Wilkinson
    • 1
    • 2
  1. 1.Laboratoire Histologie et Biologie TissulaireUniversité Claude BernardVilleurbanneFrance
  2. 2.Department of BotanyUniversity of BristolBristolEngland