Seasonal variations and annual concentration ratios relative to Na in horizontal deposition and in seawater.

The ratios are expressed as mmol mol-1 Na (mean ± SE; n = 7), but excluding the site closest to the coast (S1 Table). Different letters indicate significant seasonal differences (P < 0.05, bold text) determined using ANCOVA (categorical variable = season; continuous variable = distance from ocean) followed by post-hoc Tukey tests. There were no distance x season interaction effects on any of the nutrients except DON. Seasonal variations and annual concentration ratios relative to Na in horizontal deposition and in seawater.