Table 1.

Statistical test results comparing B vitamin concentrations at surface depths with below surface or halocline depths. Vitamin B₁ followed by B₆, the specific statistical test, failed T-test assumptions, and p value for each station is listed.

Station	Station type	Surface concentrations	Test	Failed assumption	p value
B1
1	Mesohaline	Higher	Mann–Whitney	Normality	0.002
2	Mesohaline	Lower	Mann–Whitney	Equal variance	<0.001
7	Oceanic	Higher	T-test		<0.001
9	Mesohaline	Higher	T-test		<0.001
9.1	Low-salinity	Higher	Mann–Whitney	Normality	0.044
10	Low-salinity	Higher	T-test		0.018
11	Low-salinity	Higher	Mann–Whitney	Normality	0.009
27	Oceanic	Higher	T-test		0.006
B6
2	Mesohaline	Higher	T-test		0.001
7	Oceanic	Lower	Mann–Whitney	Normality	0.005