Mathematics – Logic
Scientific paper
Jun 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982gecoa..46.1125c&link_type=abstract
Geochimica et Cosmochimica Acta, vol. 46, Issue 6, pp.1125-1129
Mathematics
Logic
Scientific paper
Stable carbon isotope ratios have been measured in skeletons of the temperature shallow water scleractinian coral, Astrangia danae . 13 C values ranging from -5.42 to -7.30%. revealed the expected depletion of 13 C in skeletal carbonate relative to sea water bicarbonate. Differences among the ratios could not be attributed to collection site and were not correlated to skeletal morphology. Values of 13 C were directly related to zooxanthellae density for all colonies, so that as zooxanthellae concentration increased, 13 C valued increased. Colonies maintained under high temperature conditions were offset from the normal, exhibiting ratios less enriched in 13 C than similar colonies from natural conditions. These trends supported the models of Weber and Goreau in which the carbon pools used in calcification are modified by algal photosynthesis. Direct evidence of physiological differences between symbiotic and asymbiotic colonies of A. danae has also been provided.
Cummings C. E.
McCarty H. B.
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