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9 Critical Factors in Plankton Abundance

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Zooplankton Graz<strong>in</strong>g<br />

Graz<strong>in</strong>g effect: Difference between graz<strong>in</strong>g<br />

rate and phytoplankton growth rate –<br />

contributes somewhat to end of SDI<br />

Graz<strong>in</strong>g quite variable, sometimes causes:<br />

1. Strong spatial variation <strong>in</strong> phytoplankton<br />

abundance,<br />

2. Cycles of phytoplankton abundance<br />

and decl<strong>in</strong>e

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