Biog 2: Energy and Biomass 09

  1. Bait Ball:
    • Small schooling fish form this when threatened by predators
    • Ex. HERRING
  2. The Producers:
    • Plant, algae, bacteria
    • these are Autotrophs
  3. Autotrophs:
    • primary producer
    • converts energy from sun to produce complex organic compounds from simple inorganic molecules
    • Ex. Plants, algae, bacteria
  4. Photosynthesis imput/output:
    • CO2 + Water = Oxygen + water + sugar
    • (in presence of light)
  5. Energy from sun; what happens to it (%)
    • 100% incoming
    • 29% reflected
    • 23% absorbed by atmosphere
    • -48% makes it to surface

    (Plants capture 20% of the total energy available)
  6. How efficient is nature?
    Nature is NOT 100% efficient
  7. How much can plants capture of the total energy available (from the sun?)
    20%
  8. GPP (Gross Primary Productivity):
    amount of energy stored by plants (without accounting for losses due to respiration).
  9. GPP:
    Gross Primary Productivity
  10. Respiration:
    the process of metabolizing ("burning'") sugars to produce energy for growth, reproduction, etc.
  11. Autotroph:
    • primary producer
    • converts energy from the sun to produce complex organic compounds from simple inorganic molecules (2)
  12. Respiration imput/output
    Sugar + oxygen --> CO2 + water

    CO2 = waste & heat
  13. NPP (Net Primary Productivity):
    the rate that plants in an ecosystem produce useful chemical energy

    NPP = GPP - Respiration
  14. GPP, Respiration, and NPP equivalents to real world:
    • GPP = INCOME
    • Respiration = operating costs
    • NPP = PROFIT
  15. Biomass:
    • the mass of living biological organisms in a given area/ecosystem at a given time
    • (Mass of all living things in an area)
  16. How is NPP Measured?
    by tracking biomass
  17. How much do humans consume of all net primary productivity on land?
    20% each year
  18. NPP
    • Net Primary Productivity
    • the rate that plants in an ecosystem produce useful chemical energy (2)
Author
Nordy911
ID
324990
Card Set
Biog 2: Energy and Biomass 09
Description
biog 2
Updated