Diapositive 1 - de l'Université libre de Bruxelles

Chapitre IITable 8: Temperature (°C), salinity (psu), growth rate calculated as the ratio of newly formedinterambulacral plates on growth duration (mg/d) and mean (±S.D) Mg/Ca (mol/mol), Sr/Ca(mol/mol).temperature salinity Growth rate Mg/Ca Sr/Ca°C psu mg/d mol/mol mol/molMean ± S.D. Mean ± S.D.13.5 36.02 0.15 0.093 ±0.004 0.0029 ±0.000113.23 39.03 0.15 0.097 ±0.016 0.0029 ±0.000118.48 36.14 0.21 0.108 ± 0.007 0.0032 ±0.000118.82 39.16 0.17 0.113 ±0.007 0.0030 ±0.000120.66 36.12 0.20 0.119 ±0.013 0.0032 ±0.000220.83 39.04 0.20 0.109 ±0.006 0.0030 ±0.000224.3 36.3 0.13 0.118 ±0.011 0.0029 ±0.000124.18 39.17 0.11 0.119 ±0.005 0.0029 ±0.0001Whatever the sequence of introduction of the variables, the stepwise multiple regressionrevealed a significant temperature effect on skeletal Mg/Ca, but no significant effect ofsalinity nor growth rate (Table 9). The temperature effect is better described by a nonlinear relation (R 2 = 0.56) than by a linear regression (y=0.064+0.023x, R 2 = 0.52, p