Indicator Species
- Created by: alexda
- Created on: 06-05-14 22:56
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- Indicator Species
- Indicator species can be studied to monitor the levels of pollution because they are very sensitive to changes in their environment.
- 1. Water pollution
- If raw sewage or other pollutants are released into a river the bacterial population increase and uses up the oxygen.
- e.g. Stonefly larvae and freshwater shrimps are indicators for water pollution because they are sensitive to the concentration of dissolved oxygen in the water.
- Other invertebrate spies have adapted to live in polluted environments so if you see them they indicate a very high level of water pollution e.g. blood worms and sludgeworms
- 2. Air pollution
- Lichen that is very sensitive to the concentration of sulfur dioxide in the atmosphere can monitor the air pollution.
- The number and type of lichen at a particular location will indicate how clean the air is. The air is clean is there is more lichen.
- Black spot fungus is found on rose leaves which is sensitive to the level of sulfur dioxide in the air so its presence will indicate clean air.
- Lichen that is very sensitive to the concentration of sulfur dioxide in the atmosphere can monitor the air pollution.
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