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9 Critical Factors in Plankton Abundance

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Nutrients<br />

Nitrogen - Microbial control<br />

Nitrogen added to ocean from atmospheric<br />

nitrogen by nitrogen fix<strong>in</strong>g bacteria<br />

Nitrify<strong>in</strong>g bacteria convert NH 4 to<br />

NO 2 , others convert NO 2 to NO 3<br />

Denitrify<strong>in</strong>g bacteria convert N0 3 to NH 4<br />

Nitrate reduc<strong>in</strong>g bacteria return NO 3 to<br />

atmosphere as N 2

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