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9 Critical Factors in Plankton Abundance

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Cause of the spr<strong>in</strong>g<br />

phytoplankton <strong>in</strong>crease:<br />

Important concepts:<br />

Mix<strong>in</strong>g depth - depth above which all water<br />

is thoroughly mixed, due to w<strong>in</strong>d.<br />

<strong>Critical</strong> depth - depth above which total oxygen<br />

produced <strong>in</strong> the water column equals total<br />

consumed<br />

If: Mix<strong>in</strong>g depth < <strong>Critical</strong> depth: bloom<br />

If: Mix<strong>in</strong>g depth > <strong>Critical</strong> depth: no bloom

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