indicator species Flashcards
(3 cards)
1
Q
definition for an indicator species?
A
indicator species are organisms that can tell us about the levels of pollution in an area by their presence or absence
2
Q
what is an example of an indicator species?
A
lichens
3
Q
what is a lichen?
A
lichens are organisms that grow in exposed places such as rocks or tree bark,they can be used as air pollution indicators,especially of the concentration of sulphur dioxide in the atmosphere.
