Pyramid of biomass (Edexcel GCSE Biology Combined Science): Flashcards
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What does a pyramid of biomass show?
What does a pyramid of biomass show?
Relative biomass at each trophic level
What happens to biomass moving up trophic levels?
What happens to biomass moving up trophic levels?
Decreases (less biomass at higher levels)
What % of sunlight do producers convert to biomass?
What % of sunlight do producers convert to biomass?
1%
Why do producers convert only ~1% of sunlight?
Why do producers convert only ~1% of sunlight?
Not all sunlight reaches photosynthesising parts
% of biomass transferred to next trophic level
% of biomass transferred to next trophic level
10%
% of biomass lost at each trophic level
% of biomass lost at each trophic level
90%
What does biomass store?
What does biomass store?
Energy
What happens to mass of organisms up trophic levels?
What happens to mass of organisms up trophic levels?
Goes down
Why does mass decrease up trophic levels?
Why does mass decrease up trophic levels?
Most biomass/energy is lost, not converted to next level
Why is energy lost at each trophic level?
Why is energy lost at each trophic level?
Not all consumed food converts to biomass