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Nutrient drawdown ratios of (A,B) N/P and (C,D) Si/N for the five stations in this study. For (B,D) values are shown for all three treatments for each station. Values are calculated as the ratios of final minus initial nutrient concentrations. Error bars show standard error. Broken lines in (A,C) and solid lines in (B,D) show typical ratios of diatom cellular nutrient quotas.
