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9 Critical Factors in Plankton Abundance

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Nutrients<br />

Iron - important cofactor (Fe-S prote<strong>in</strong>) <strong>in</strong> oxygen<br />

production step of photosynthesis<br />

FERREDOXIN – ELECTRON ACCEPTOR -DONOR<br />

Fe: Shown <strong>in</strong> lab experiment to enhance<br />

phytoplankton growth<br />

High Nitrogen-Low Chlorophyll regions:<br />

May be crucial <strong>in</strong> parts of the ocean (eastern<br />

equatorial Pacific, South Pacific gyre,<br />

parts of Antarctic, north<br />

Pacific where nitrogen appears not to be<br />

limit<strong>in</strong>g factor (<strong>in</strong> excess <strong>in</strong> surface seawater)

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