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9 Critical Factors in Plankton Abundance

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Nutrient uptake<br />

Nutrient uptake by phytoplankton cells<br />

varies with nutrient concentration<br />

Modell<strong>in</strong>g uptake:<br />

Need to know (1) nutrient concentration C<br />

And (2) rate of uptake of nutrients, which<br />

we measure <strong>in</strong>directly as D, cell doubl<strong>in</strong>gs/day<br />

(3) K is concentration at which cell doubl<strong>in</strong>g<br />

rate is one half of maximum doubl<strong>in</strong>g

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