4.7.2 Organisation of an ecosystem (will come up) P2 Flashcards
Define population
A species that occupy the same habitat
Define habitat
The place in which an organism lives
Define community
Populations of different species interacting
Define ecosystem
The interactions between the biotic and abiotic factors in an area
What do food chains show
The feeding relationship of different organisms and the flow of energy between the organisms
Define biomass
The total mass of living material
What are trophic levels
The stages in a food chain
What do arrows in a food chain represent
The direction of biomass transfer
Describe a simple food chain
Producer –> primary producer –> secondary consumer –> tertiary consumer
What is a producer
An organism that makes its own food
What types of organisms are producers
Photosynthetic organisms like green plants and algae that trap energy from the sun
What is a primary consumer
An organism that feeds on producers
What is a secondary consumer
An organism that feeds on primary consumers
What is a tertiary consumer
An organism that feeds on secondary consumers
What is a predator
A consumer that kills and eats other animals
What is prey
An animal that is killed and eaten by another animal
Describe the pattern of predators and prey in a stable community
The numbers of predators and prey rise and fall in cycles
What do producers of the first trophic level provide
Producers provide all biomass for the food chain (production of glucose via photosynthesis)
The rest of the food chain involves the transfer of this biomass
What piece of apparatus is used to measure the abundance and distribution of organisms in an area
Quadrat
