MAR 510 Chemical Oceanography Primary production seawifs.gsfc.nasa.gov/SEAWIFS/IMAGES/SEAWIFS_GALLERY.html Primary Production in the Ocean A global composite of sea surface chlorophyll concentration High High - - nutrient, low chlorophyll (HNLC) nutrient, low chlorophyll (HNLC) Oligotrophic gyre (LNLC) Oligotrophic gyre (LNLC) Coastal Coastal Upwelling Upwelling Seasonal Seasonal Phytoplankton Phytoplankton blooms blooms
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Examples of the larger phytoplankton Coccolithophori
d Dinoflagellate
Diatom Diato
m
MAR 510Chemical
Oceanography
Primary production
Atmosphere
Aphotic Zone
Euphotic zone
CO2
Biological Pump
CO2
CO2
OrganicMatter
Particle sinking, downward transport of DOM
OM decomposition
O2
Phytoplankton(no change in ALK
net decrease in pCO2)
Incident Light
O2
ZooplanktonBacteriaN, P, Si, trace metals
N, P, Si, trace metals
Vertical mixing, advection
O2
MAR 510Chemical
Oceanography
Primary production
Law of the Minimum - Liebig's Law
Justus von Liebig, generally credited as the "father of the fertilizer industry", formulated the law of the minimum: if one crop nutrient is missing or deficient, plant growth will be poor, even if the other elements are abundant.Liebig likens the potential of a crop to a barrel with staves of unequal length. The capacity of this barrel is limited by the length of the shortest stave (in this case, phosphorus) and can only be increased by lengthening that stave. When that stave is lengthened, another one becomes the limiting factor.