Which one of the following is not a bioindicator of water pollution?
Which one of the following is not a bioindicator of water pollution?
The correct option is D Stone flies
Stoneflies are usually associated with clean, cool flowing streams. Most stonefly taxa are sensitive to water pollution. Generally, the presence of stoneflies is a reliable indicator of excellent water quality, but because of their specific habitat requirements, their absence does not necessarily mean the waterbody is polluted.
Sewage fungus is a mass of filamentous bacteria that usually grows in response to pollution.
Sludge worms and Bloodworms contain haemoglobin that helps them transport oxygen much more efficiently and thus, they have a lower requirement for oxygen. On the other hand, Stoneflies have no haemoglobin and transport oxygen through their body through diffusion. This is more ineffecient and hence they have a higher oxygen requirement.
Since polluted water has a lower oxygen concentration due to the presence of large amounts of organic matter, bloodworms and sludge worms are more abundantly present.
Stoneflies are usually associated with clean, cool flowing streams. Most stonefly taxa are sensitive to water pollution. Generally, the presence of stoneflies is a reliable indicator of excellent water quality, but because of their specific habitat requirements, their absence does not necessarily mean the waterbody is polluted.
Sewage fungus is a mass of filamentous bacteria that usually grows in response to pollution.
Sludge worms and Bloodworms contain haemoglobin that helps them transport oxygen much more efficiently and thus, they have a lower requirement for oxygen. On the other hand, Stoneflies have no haemoglobin and transport oxygen through their body through diffusion. This is more ineffecient and hence they have a higher oxygen requirement.
Since polluted water has a lower oxygen concentration due to the presence of large amounts of organic matter, bloodworms and sludge worms are more abundantly present.
