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Primary Productivity Nutrient Cycling Honors Biology – Edgar October 2011
 
 
 
 
 
 
 
NPP=GPP-R
 
 
 
 
phytoplankton Who are the Phytoplankton? Coccolithophore Diatoms Dinoflagellates
Thermocline Depth in meters 0 100 Nutrients Euphotic Zone or Mixed Layer Thermocline 0µM   5µM   10µM 200 0%   50% 100%   Light 0°   10°   20°  Temperature
Gulf of Maine Data:  Wilkinson and Jordan Basins Wilk. Basin Jordan Basin
Redfield Nucleic Acids Lipids Proteins Carbohydrates CO 2 Light Nutrients (N, P, etc) The Redfield Ratio 106   Carbon :   16   Nitrogen :   1   Phosphorus Liebig’s Law:   Growth of a “plant” is determined by availability of the single most limiting resource.
Duck?
 
 
 
 
 
 
 
Nutrient Cycle
 
 
 

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