Mineralogic Changes during Growth in the Red Alga, Clathromorphum compactum

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Science  05 Feb 1965:
Vol. 147, Issue 3658, pp. 621
DOI: 10.1126/science.147.3658.621


The amount of magnesium in the skeletal calcite of the encrusting marine red alga Clathromorphum compactum varies seasonally in response to changes in water temperature. X-ray diffraction analyses of serial samples of this alga collected in the Gulf of Maine indicate more than a 40-percent change in composition during a year and demonstrate a more rapid calcification during warmer periods.