Ecological pyramids

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How are pyramids of number presented?
Numbers of organisms at lower trophic levels are greater than the numbers at higher levels
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Negatives of pyramids of number?
No account is taken of size, can be impossible to accurate large numbers on same scale as other species
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What is biomass?
Total mass of plants and/or animals in a place
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Negative of pyramids of biomass
Only organisms present at a certain time are shown, seasonal differences not apparent
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Why are pyramids of energy more reliable?
2 organisms of same dry mass may store different amounts of energy
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What is energy flow measured in?
kJm-2/year-1
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Other cards in this set

Card 2

Front

Negatives of pyramids of number?

Back

No account is taken of size, can be impossible to accurate large numbers on same scale as other species

Card 3

Front

What is biomass?

Back

Preview of the front of card 3

Card 4

Front

Negative of pyramids of biomass

Back

Preview of the front of card 4

Card 5

Front

Why are pyramids of energy more reliable?

Back

Preview of the front of card 5
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