CHAPTER 21 NOTES

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What percent of light energy is used in photosynthesis?
only 1% of light energy is used
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What is primary productivity?
The rate at which producers convert light energy to chemical energy
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What is biomass?
biomass is the total mass of plant matter that accumulates from primary productivity.
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What percent of primary productivity ends up as matter?
Only about 50% of primary productivity ends up as matter- the other 50% is in the form of energy.
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What percent of vegetation do herbivores eat?
Herbivores only eat about 10% of the available vegetation, decomposers and detritivores consume the rest
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Will there be much new animal tissue produced?
no the amount of new animal tissue produced from eating plant matter is tiny
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What is a pyramid of biomass?
The pyramid of biomass represents the amount of energy in a food chain.
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What is bioaccumulation?
the accumulation of substances like toxins.
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What is the greenhouse effect?
Co2 builds up in the atmosphere and traps infra-red radiation, causing the Earth to heat up.
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Card 2

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What is primary productivity?

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The rate at which producers convert light energy to chemical energy

Card 3

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What is biomass?

Back

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Card 4

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What percent of primary productivity ends up as matter?

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Card 5

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What percent of vegetation do herbivores eat?

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