8.2 Environmental change and distribution of organisms

Question	Answer
What do living organisms form?	Communities that we need to understand
What do changes in the environment affect?	The distribution of living organisms
What are the environmental factors that may affect organisms?	Change in numbers or types of competitor organism Temperature Availability of nutrients Amount of light Availability of water Availability of oxygen and carbon dioxide Availability of nesting sites, shelter and appropriate habitats
How can living organisms be used as indicators of environmental change?	Lichens can be used as air pollution indicators, particularly of the concentration of sulphur dioxide in the atmosphere Invertebrate animals can be used as water pollution indicators and are used to indicate the concentration of dissolved oxygen in water
Which environmental changes can be measured using non-living indicators?	Oxygen levels Temperature Rainfall
What are the advantages of using equipment to measure oxygen levels, temperature and rainfall?	More accurate
What are the disadvantages of using equipment to measure oxygen levels, temperature and rainfall?	*
How can quantitative data on the distribution of organisms be obtained?	By random sampling with quadrants By sampling along a transect
What is size of distribution related to?	Validity Reproducibility Repeatability

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	Created by Anisha Rai over 8 years ago