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 10
A scientist observes a sudden decline in frog populations in a wetland. What could this indicate about the wetland's environmental health?
Describe how indicator species can be used in conservation efforts.
Describe how indicator species can be used to monitor the effects of acid rain.
Describe how the presence of indicator species can help in detecting invasive species.
Describe one limitation of using indicator species to assess environmental health.
A scientist observes a sudden decline in frog populations in a wetland. What could this indicate about the wetland's environmental health?
A national park is considering reintroducing a locally extinct indicator species to monitor ecosystem recovery. Discuss one potential risk and one potential benefit of this approach.
A river ecosystem is being monitored for pollution. Scientists notice that the population of mayfly larvae has decreased significantly, while the population of tubifex worms has increased. Explain what this change in indicator species populations suggests about the water quality and why.
Which of the following is a limitation of using indicator species?
(1) They are always present
(2) They may not respond to all types of pollution
(3) They are never affected by climate
(4) They are always easy to study
Which of the following is a reason why amphibians are often used as indicator species?
(1) They are immune to pollutants
(2) They have permeable skin
(3) They only live in polluted areas
(4) They are always abundant
Which of the following is a reason why scientists use indicator species instead of chemical tests alone?
(1) Indicator species are always more accurate
(2) Indicator species can show long-term effects
(3) Chemical tests are never reliable
(4) Indicator species are easier to find
Which of the following is an example of a plant indicator species for acidic soils?
(1) Pine trees
(2) Heather
(3) Cactus
(4) Mangrove
Fill in the blank: ________ are often used as indicator species in grassland ecosystems.
Fill in the blank: ________ are often used as indicator species in marine environments to detect changes in water quality.
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 in many regions is often used as an indicator of ________ quality.
True or False: All indicator species are endangered species.
True or False: Indicator species are only found in natural, undisturbed habitats.
True or False: Indicator species can be used to assess the impact of pesticides on ecosystems.
True or False: Indicator species can be used to monitor both terrestrial and aquatic ecosystems.
