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9 Critical Factors in Plankton Abundance

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Light and Phytoplankton - concepts<br />

Consider a phytoplankton cell held <strong>in</strong> clear<br />

glass jar at a certa<strong>in</strong> depth ( = a certa<strong>in</strong> light<br />

<strong>in</strong>tensity:<br />

Compensation depth -<br />

O 2 produced = O 2 consumed<br />

O 2 changes:<br />

+ photosynthesis<br />

- respiration<br />

Compensation light <strong>in</strong>tensity -<br />

- the light <strong>in</strong>tensity correspond<strong>in</strong>g<br />

to the compensation<br />

depth

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