Ecosystems Flashcards
What is an ecosystem?
The interaction between all living things in a habitat, and the non-living environment they live in
What is a community?
The different species which live in a particular habitat
What is a population?
A group of the same species living in one area
What is an organism?
A living thing
What is a habitat?
The place where a living thing lives
What is interdependence?
When organisms depend on each other for resources such as food, shelter, etc.
What is the difference between a community and a population?
A population is a group of the same species living in one area, whereas a community includes all the different species in an area.
What is the difference between a community and an ecosystem?
A community includes all the living things in one area, whereas an ecosystem includes both living and non-living things.
What is an abiotic facator?
Non-living aspects of an ecosystem
What are biotic factors?
Living factors in an ecosystem
Give some examples of abiotic factors
e.g. light intensity, temperature, oxygen availability, strong winds, regular flooding
Give some examples of biotic factors
e.g. predators, prey, competition for food or space
Which piece of equipment do you need to estimate the population of daisies in a field?
quadrat
What is a parasitic relationship?
Where two different organisms live together. The parasite benefits and the host suffers
What is a mutualistic relationship?
Where two different organisms depend on each other and both benefit
Which types of organisms are producers?
Plants and algae
What are producers?
An organism which photosynthesises to produce energy
which key word describes animals which eat producers?
Primary consumers
Which key word describes animals which eat primary consumers?
Secondary consumers
What do the arrows in a food chain represent?
The transfer of energy
What is biomass?
The dry mass of an organism or group of organisms
In a pyramid of biomass, what do the bars represent?
The total biomass of each stage in a food chain
What is a trophic level?
A step in the food chain
How is energy lost in a food chain?
due to movement, heat loss, excretion (faeces and urine)
How is efficiency in a food chain calculated?
= energy transferred to biomass / energy supplied
