Distribution Of Organisms Flashcards
(16 cards)
What control where an organism can live?
Different factors
What are 2 types of factors which controls where an organism lives?
Abiotic factors
Biotic factors
What are abiotic factors?
Non-living environmental variables which controls where organism lives
What are 4 abiotic factors?
Light intensity
Moisture
pH
Temperature
How do you measure abiotic factors?
Different instruments
What should you do if you want to increase reliability of your measurements?
Repeat
What are biotic factors?
Living variables which controls where an organism lives
What are 5 biotic factors?
Predation
Disease
Food availability
Grazing
Competition for resources
How do you measure biotic factors?
Sampling
What are quadrats used for?
Sample small plant and slow-moving organisms
How do you use a quadrat?
Throw at random, avoid bias
Count organisms within it
What do you use a pitfall trap for?
Trap small invertebrates
What can be used to show how populations change across an area?
Line transect
What factors can affect distribution of where an organism lives?
Abiotic
Biotic
What is an indicator species?
Shows environmental quality or level of pollution (By presence or absence)
What is a biological key used for?
Used to identify an organism based on its features
