Pyrmadis of Number, Biomass and Energy Flashcards
What do food chains always start with?
A Producer
How do producers get food?
Producers make their own food using energy from the sun.
What are producers eaten by?
Producers eaten by Primary consumers.
Primary consumers eaten by
secondary consumers.
Secondary consumers eaten by tirtiary consumers.
When these organisms die what are they eaten by?
Decomposers
How do decomposers work?
Decomposers break down dead material and waste.
What is each stage called?
A Trophic Level
What does each bar on the pyramid of numbers show?
It shows the number of organisms at that stage of the food chain.
How is the pyramid of numbers arranged?
Using the food chain, if at the bottom of the food chain, it is at the bottom of the pyramid of numbers.
Is a pyramid of numbers always a regular triangle?
No, for example 500 fleas could feed off 1 fox.
What does each bar on the Pyramid of Biomass show?
It shows the mass of living material at that stage of the food chain.
Is a pyramid of Biomass always the right shape?
Yes, mostly, as 500 flease do not weigh more than 1 fox.
What do Pyrmaids of Energy show?
They show the energy transferred at each trophic level of the pyramid.
Are pyramids of energy always the right shape?
Yes
