Energy transfer (Edexcel GCSE Biology Combined Science): Flashcards
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Definition of trophic level
Definition of trophic level
Position an organism occupies in a food chain
% of energy passed to next trophic level (10% rule)
% of energy passed to next trophic level (10% rule)
About 10%
3 ways energy is lost at each trophic level
3 ways energy is lost at each trophic level
Respiration, excretion, uneaten parts
Form of energy lost during respiration
Form of energy lost during respiration
Heat to the environment
Reason for fewer organisms at higher trophic levels
Reason for fewer organisms at higher trophic levels
Less energy available as you move up the food chain
Typical max number of trophic levels in a food chain
Typical max number of trophic levels in a food chain
4 to 5 levels
Why producers have most energy in ecosystem
Why producers have most energy in ecosystem
Receive energy directly from sun via photosynthesis
Efficiency formula for biomass transfer
Efficiency formula for biomass transfer
Examples of incomplete consumption by carnivores
Examples of incomplete consumption by carnivores
Bones, hooves, claws not consumed
Why rare to have more than 5 trophic levels
Why rare to have more than 5 trophic levels
Not enough energy left to support more organisms