Trophic Levels in an Ecosystem (AQA GCSE Biology): Flashcards
📚Flashcards
Practise the cards
13 cards from this deck
ShowHide
Practise the cards
13 cards from this deck
Trophic levels
Trophic levels
Different feeding positions in a food chain
Level 1 trophic level organisms
Level 1 trophic level organisms
Producers - plants & algae that make their own food
Level 2 trophic level organisms
Level 2 trophic level organisms
Primary consumers - herbivores that eat plants & algae
Level 3 trophic level organisms
Level 3 trophic level organisms
Secondary consumers - carnivores that eat herbivores
Level 4 trophic level organisms
Level 4 trophic level organisms
Tertiary consumers - carnivores that eat other carnivores
Biomass
Biomass
Mass of living material in an organism
Dry mass
Dry mass
Mass without any water
Pyramid of biomass
Pyramid of biomass
Shows how much biomass exists at each trophic level
% of sun's light energy turned into food by plants
% of sun's light energy turned into food by plants
About 1%
% of biomass passing from one trophic level to next
% of biomass passing from one trophic level to next
About 10%
Why pyramids of biomass get smaller at each level
Why pyramids of biomass get smaller at each level
Energy lost through respiration, heat, waste & urine
Organism numbers for same biomass: small vs large
Organism numbers for same biomass: small vs large
More small organisms than large organisms