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. 1990 Jun;56(6):1750–1762. doi: 10.1128/aem.56.6.1750-1762.1990

Phenotypic study of bacteria associated with the caribbean sclerosponge, Ceratoporella nicholsoni.

D L Santavy 1, P Willenz 1, R R Colwell 1
PMCID: PMC184505  PMID: 2383012

Abstract

Heterotrophic bacteria associated with the Caribbean sclerosponge, Ceratoporella nicholsoni (Hickson), were found to occur extracellularly and were confined to the mesohyl regions of the sponge tissue. Physiological, metabolic, and morphological attributes of the culturable bacteria associated with the sponge were recorded by using numerical taxonomy methods for the analysis of 158 phenotypic attributes. Morphometric methods were used to determine the proportion of the total sponge-associated bacteria that were culturable by the methods employed, with the results ranging from 3 to 11% of the total bacteria inhabiting the sponge. Approximately 78% of the culturable bacteria clustered into four groups or phena, representing two previously undescribed Vibrio spp., an Aeromonas sp., and a coryneform- or actinomycete-like sp. Most of the bacteria were facultative anaerobes, fermenting sucrose and fucose but unusual in an inability to ferment glucose. This study was the first comprehensive study of heterotrophic bacteria associated with a sponge from the Caribbean basin, a region reputed to contain the most prolific sponge populations, with respect to biomass and diversity. The possible significance of these associations is discussed.

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Selected References

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