ecology and the enviroment Flashcards
1
Q
what is the definition of a producer
A
organisms which make their own food
2
Q
what is the definition of a primary consumer
A
the first animal in a food chain/ web
3
Q
what is the definition of a secondary consumer
A
the second animal in a food chain/food web
4
Q
what is the definition of a tertiary consumer
A
the final animal in a food chain/ food web
5
Q
what is the definition of a decomposer
A
vital for recycling nutrients
6
Q
describe a food web
A
- complex
- shows links between many species
- useful for understanding the links between the species in a community
7
Q
describe a pyramid of number
A
- drawn to show the number of each organism counted in the ecosystem
- they can be odd shapes due to the different masses of organisms
8
Q
describe a pyramid of biomass
A
- drawn to show the total mass of the organisms in each trophic level
-accurate way of looking at the relative amount of organisms
9
Q
describe a pyramid of energy transfer
A
- drawn to show the total energy available i each trophic level per square meter per year
- there should be a decrease in energy between each trophic level
