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Regression lines relating metals to nutrients throughout the water column from studies conducted in the Sanctuary where r is the correlation coefficient for the regression line. Ni appears to be linearly correlated with Si at depths greater than 1000 m as described by a multiple regression equation.

 

Ratio Regression Line r Reference
Cd:PO4 [Cd nM] = (0.347 ± 0.007)[PO4 µM] - (0.068 ± 0.017) 0.992 Bruland, 1980
Cd:PO4 ng Cd = -3.6 + 34.9 (µmol PO4) 0.998 Martin et al., 1980a
Zn:Si [Zn nM] = (0.0535 ± 0.0008)[Si µM] + (0.02 ± 0.09) 0.996 Bruland, 1980
Zn:Si ng Zn = -12.1 + 3.98(µmol Si) 0.992 Martin et al., 1980b
Ni:PO4 and Si [Ni nM] = (0.95 ± 0.08)[PO4 µM] + (0.033 ± 0.001)[Si µM] +2.74 0.995 Bruland, 1980

 

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