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Bait Ball:
- Small schooling fish form this when threatened by predators
- Ex. HERRING
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The Producers:
- Plant, algae, bacteria
- these are Autotrophs
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Autotrophs:
- primary producer
- converts energy from sun to produce complex organic compounds from simple inorganic molecules
- Ex. Plants, algae, bacteria
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Photosynthesis imput/output:
- CO2 + Water = Oxygen + water + sugar
- (in presence of light)
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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)
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How efficient is nature?
Nature is NOT 100% efficient
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How much can plants capture of the total energy available (from the sun?)
20%
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GPP (Gross Primary Productivity):
amount of energy stored by plants (without accounting for losses due to respiration).
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GPP:
Gross Primary Productivity
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Respiration:
the process of metabolizing ("burning'") sugars to produce energy for growth, reproduction, etc.
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Autotroph:
- primary producer
- converts energy from the sun to produce complex organic compounds from simple inorganic molecules (2)
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Respiration imput/output
Sugar + oxygen --> CO2 + water
CO2 = waste & heat
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NPP (Net Primary Productivity):
the rate that plants in an ecosystem produce useful chemical energy
NPP = GPP - Respiration
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GPP, Respiration, and NPP equivalents to real world:
- GPP = INCOME
- Respiration = operating costs
- NPP = PROFIT
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Biomass:
- the mass of living biological organisms in a given area/ecosystem at a given time
- (Mass of all living things in an area)
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How is NPP Measured?
by tracking biomass
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How much do humans consume of all net primary productivity on land?
20% each year
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NPP
- Net Primary Productivity
- the rate that plants in an ecosystem produce useful chemical energy (2)
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