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 9
A river is found to have a high number of tubifex worms and very few mayfly larvae. What does this suggest about the river's water quality?
A scientist observes a sudden decline in frog populations in a wetland. What might this indicate about the wetland's environment?
Describe how indicator species can be used to monitor the effects of acid rain.
Describe one reason why indicator species might disappear from an ecosystem even if pollution levels have not changed.
Describe one way in which indicator species can help scientists detect pollution.
Explain how indicator species can be used to track the recovery of an ecosystem after a disturbance.
A river is found to have a high number of tubifex worms and very few mayfly larvae. What does this suggest about the river's water quality?
A scientist observes a sudden decline in frog populations in a wetland. What might this indicate about the wetland's environment?
Which of the following best describes the role of indicator species in an ecosystem?
(1) They are always at the top of the food chain
(2) They reflect the health of the environment
(3) They are always invasive species
(4) They are always extinct
Which of the following is a benefit of using indicator species in environmental monitoring?
(1) They provide early warning signs of ecosystem changes
(2) They are always the largest species
(3) They are immune to disease
(4) They never migrate
Which of the following is a limitation of using indicator species?
(1) They may not respond to all types of pollution
(2) They are always easy to find
(3) They never migrate
(4) They are always predators
Which of the following is a reason why indicator species are important in conservation?
(1) They help identify areas needing protection
(2) They are always the most common species
(3) They are not affected by environmental changes
(4) They are always predators
Fill in the blank: ________ are often used as indicator species in freshwater streams to assess water quality.
Fill in the blank: ________ are often used as indicator species to assess the health of coral reefs.
Fill in the blank: Indicator species are often used in ________ assessments to determine the health of an environment.
Fill in the blank: The decline of amphibian populations worldwide is often used as an indicator of ________ quality.
True or False: Indicator species are always endangered species.
True or False: Indicator species can be used to assess the impact of climate change on ecosystems.
True or False: Indicator species can be used to monitor both terrestrial and aquatic ecosystems.
True or False: Indicator species can be used to monitor the success of habitat restoration projects.
