Abstract

Magnesium, temperature and rate of growth interrelations are studied in the shell material of three gastropod species: Patella coerulea, Monodonta turbinata and M. articulata. Mg and temperature are correlated positively in the shell calcite of Patella coerulea and Monodonta articulata, and negatively in the aragonite of M. turbinata shells. The correlations are often statistically significant at a high level of confidence and can be used as tools for ecological and paleoecological investigations. Temperature seems to be the main causal factor that controls Mg incorporation into the shell calcite, whereas, in the aragonitic M. turbinata shells, the rate of growth appears to play a determinant role on Mg concentrations.

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