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Stable Isotope Composition of Benthic Calcareous Algae from Bermuda
Gerold Wefer, Wolfgang H. Berger
Carbonate secreted by benthic algae from Bermuda (5 genera, 3 phyla) can be grouped into four types according to the 18O and 13C composition: a "heavy" and a "light" set for oxygen, and a "large-variability" and a "small-variability" set for carbon. The sets are not congruent. In one alga, different parts of the same skeleton belong to different oxygen sets. Vital effects, which are tied to developmental stages as well as to environmental response, are predominant in producing the observed isotopic variations.
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