B1.5 Biomass Flashcards
What do the arrows represents in a food chain?
The flow of energy
What is the producer?
An autotroph- makes own food through photosynthesis
- green plants and algae
What is the primary consumer?
Herbivores that eat the producer
-e.g rabbits, cows, caterpillars
What is a predator?
An animal that kills its food
- Secondary or tertiary consumer
What is prey?
Animals that predators feed on
What is an apex predator?
The predator that has no predators of its own
What is a scavenger?
An organism that eats already dead animals
-e.g hyenas
What is a decomposer?
An organism that eats dead or decaying organisms or the undigested plant and animal matter in faeces
What is a trophic level?
A hierarchical level in the food chain
Where does the energy from food go?
Faeces, urine, respiration and heat energy
What is an anabolic reaction?
A reaction where your body makes something
What is a catabolic reaction?
A reaction where your body breaks something down
Is a pyramid of biomass always useful
Yes
Is a pramid representing numbers always useful?
No
What does a pyramid of biomass show?
The mass of the living material at each point during the chain
What is the ultimate source of energy in the food cycle?
The sun providing heat/light energy
How does the energy transfer change from one consumer to the next in the food chain?
Less energy is transferred as it is excreted, respired, used up in reactions to grow etc
How does biomass change from one stage to the next in the food chain?
Biomass decreases (like energy) In a biomass pyriamid the columns grow smaller
