Relationships between nutrient-limited growth rates, pCO₂, and toxicity in <i>Pseudo-nitzschia fraudulenta</i>.

<p>Specific growth rates (day⁻¹) versus pCO₂ (<b>a</b>) and cellular domoic acid quota (pg cell⁻¹) versus specific growth rates (<b>b</b>) under Si(OH)₄-limited (•) and nutrient-replete (○) conditions at three seawater CO₂ concentrations (200, 360 and 765 ppm). Panel insets present the Si(OH)₄-limited (<b>a</b>) or nutrient-replete (<b>b</b>) data with an expanded Y-axis scale for clarity. Error bars represent standard deviations of triplicates for each treatment.