Indicator Species
Biology ⇒ Ecology and Environment
Indicator Species starts at 9 and continues till grade 12.
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See sample questions for grade 12
A river is found to have a high abundance of pollution-tolerant midge larvae but very few mayfly larvae. What does this suggest about the water quality?
A scientist observes a sudden decline in lichen populations in a city. What might this indicate about the air quality?
Describe how the absence of an indicator species can provide information about an ecosystem.
Describe one limitation of using indicator species to assess environmental health.
Describe the difference between an indicator species and a keystone species.
Explain how indicator species can be used in the assessment of ecosystem restoration success.
A river is found to have a high abundance of pollution-tolerant midge larvae but very few mayfly larvae. What does this suggest about the water quality?
A scientist observes a sudden decline in lichen populations in a city. What might this indicate about the air quality?
Which of the following is a limitation of using indicator species?
(1) They are always easy to find
(2) They may not respond to all types of environmental stress
(3) They are always present in all ecosystems
(4) They are unaffected by human activity
Which of the following is a potential drawback of relying solely on indicator species for environmental assessment?
(1) They may not be present in all habitats
(2) They always provide precise data
(3) They are unaffected by seasonal changes
(4) They are immune to disease
Which of the following is a reason why indicator species are important in environmental monitoring?
(1) They are always endangered
(2) They provide early warning signs of ecosystem changes
(3) They are the most abundant species
(4) They are always predators
Which of the following is an example of a bioindicator for heavy metal pollution?
(1) Earthworms
(2) Butterflies
(3) Pine trees
(4) Dolphins
Fill in the blank: ________ are often used as indicator species in forests to monitor the effects of logging and habitat fragmentation.
Fill in the blank: ________ are often used as indicator species in streams to assess the level of dissolved oxygen.
Fill in the blank: Amphibians are often used as indicator species because their ________ skin makes them sensitive to environmental changes.
Fill in the blank: The decline of ________ populations in wetlands can indicate the presence of pollutants such as pesticides.
True or False: All indicator species are keystone species.
True or False: Indicator species are always native to the ecosystem they indicate.
True or False: Indicator species are always the most abundant species in an ecosystem.
True or False: Indicator species can be used to assess both terrestrial and aquatic ecosystems.
