APES 1.8 Notes - Primary Productivity
deeper than 100 meters
how far can blue light penetrate in water?
within the first meter
how quickly is red light absorbed in water?
detritus
plant/animal remains
primary productivity
the rate at which energy (sunlight) is converted into organic compounds via photosynthesis over a unit of time
net primary productivity (NPP)
the rate of energy storage by photosynthesizers in a given area, after subtracting the energy lost to respiration (GPP-cellular respiration)
gross primary productivity (GPP)
the total rate of photosynthesis in a given area
red and blue light
what are the 2 main energy sources for photosynthesis?
units of energy per unit area per unit time, kcal/m^2/yr
what is productivity measured in?
carbon, hydrogen
what two elements must be present for a compound to be organic?
swamps, marshes, tropical rainforests
which 3 terrestrial ecosystems have the highest NPP?
estuaries
which aquatic ecosystem has the highest NPP?