Indicator Species: How Different Species Indicate Pollution in the Environment

The video explains indicator species, organisms that signal pollution levels in air and water. It covers air pollution indicators like lichens and black spot fungus, and water pollution indicators like stoneflies and bloodworms. The reliability of these species compared to direct pollution measurements is discussed, highlighting their role in assessing ecosystem health.

What is the primary role of an indicator species in an ecosystem?

• To provide food for other species

• To indicate the presence or absence of pollution

• To control the population of other species

• To produce oxygen for the environment

Which of the following is a common source of air pollution?

• Combustion of fossil fuels

• Natural disasters

• Plant respiration

• Photosynthesis

Which type of lichen can tolerate very low levels of air pollution?

• Crusty lichens

• Leafy lichens

• Bushy lichens

• All lichens

What does the presence of black spot fungus on roses indicate?

• Low levels of oxygen

• High levels of carbon monoxide

• Low levels of sulfur pollution

• High levels of nitrogen pollution

What is eutrophication primarily caused by?

• Low carbon dioxide levels

• Excess nutrients in water

• Lack of sunlight

• High oxygen levels

Which aquatic invertebrate indicates clean water?

• Bloodworms

• Sludge worms

• Stoneflies

• Leeches

How do numerical data readings from sensors compare to indicator species?

• They are more subjective

• They provide immediate and detailed measurements

• They are less accurate

• They are slower to obtain