Biochemical trade-offs: evidence for ecologically linked secondary metabolism of the sponge Oscarella balibaloi.

Details

Serval ID
serval:BIB_FB7B20FD489C
Type
Article: article from journal or magazin.
Collection
Publications
Title
Biochemical trade-offs: evidence for ecologically linked secondary metabolism of the sponge Oscarella balibaloi.
Journal
Plos One
Author(s)
Ivanisevic J., Thomas O.P., Pedel L., Pénez N., Ereskovsky A.V., Culioli G., Pérez T.
ISSN
1932-6203 (Electronic)
ISSN-L
1932-6203
Publication state
Published
Issued date
2011
Peer-reviewed
Oui
Volume
6
Number
11
Pages
e28059
Language
english
Abstract
Secondary metabolite production is assumed to be costly and therefore the resource allocation to their production should be optimized with respect to primary biological functions such as growth or reproduction. Sponges are known to produce a great diversity of secondary metabolites with powerful biological activities that may explain their domination in some hard substrate communities both in terms of diversity and biomass. Oscarella balibaloi (Homoscleromorpha) is a recently described, highly dynamic species, which often overgrows other sessile marine invertebrates. Bioactivity measurements (standardized Microtox assay) and metabolic fingerprints were used as indicators of the baseline variations of the O. balibaloi secondary metabolism, and related to the sponge reproductive effort over two years. The bioactivity showed a significant seasonal variation with the lowest values at the end of spring and in early summer followed by the highest bioactivity in the late summer and autumn. An effect of the seawater temperature was detected, with a significantly higher bioactivity in warm conditions. There was also a tendency of a higher bioactivity when O. balibaloi was found overgrowing other sponge species. Metabolic fingerprints revealed the existence of three principal metabolic phenotypes: phenotype 1 exhibited by a majority of low bioactive, female individuals, whereas phenotypes 2 and 3 correspond to a majority of highly bioactive, non-reproductive individuals. The bioactivity was negatively correlated to the reproductive effort, minimal bioactivities coinciding with the period of embryogenesis and larval development. Our results fit the Optimal Defense Theory with an investment in the reproduction mainly shaping the secondary metabolism variability, and a less pronounced influence of other biotic (species interaction) and abiotic (temperature) factors.
Keywords
Animals, Ecosystem, Metabolome, Phenotype, Porifera/metabolism, Reproduction, Seawater, Temperature, Time Factors
Pubmed
Open Access
Yes
Create date
06/06/2016 22:11
Last modification date
20/08/2019 17:26
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