honors ~ ecosystems 1112
TRANSCRIPT
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Primary ProductivityNutrient Cycling
Honors Biology – Edgar
October 2011
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NPP=GPP-R
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phytoplankton
Who are the Phytoplankton?
Coccolithophore
Diatoms
Dinoflagellates
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Dep
th in
m
ete
rs0
100
Nutrients
Euphotic
Zone or
Mixed Layer
Thermocline
0µM 5µM 10µM
200
Thermocline
0% 50% 100% Light0° 10° 20° Temperature
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Gulf of Maine Data: Wilkinson and Jordan
Basins
Wilk. Basin
Jordan Basin
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Nucleic AcidsLipidsProteinsCarbohydrates
CO2
LightNutrients (N, P, etc)
The Redfield Ratio106106 Carbon : 1616 Nitrogen : 11 Phosphorus
Liebig’s Law:Liebig’s Law: Growth of a “plant” is determined by availability of the single most limiting
resource. Redfield
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Duck?
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Nutrient Cycle
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