ECOLOGY
ENVIRONMENTAL ISSUES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The water quality is improving.
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The water quality is unchanged.
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The water quality is decreasing.
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There is no connection between water quality and macroinvertebrates.
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Detailed explanation-1: -Aquatic macroinvertebrates are good indicators of stream quality because: They are affected by the physical, chemical, and biological conditions of the stream. They can’t escape pollution and show the effects of short-and long term pollution events. They may show the cumulative impacts of pollution.
Detailed explanation-2: -Pollution-Tolerant Organisms They often have adaptations that allow them to survive in water with low dissolved oxygen, turbid waters or nutrient-enriched waters. There are no “bad” macroinvertebrates.
Detailed explanation-3: -Elevated temperature seasonally altered macroinvertebrate abundance and life history in the channels. Few animals were found in the heated channel during the period of maximum water temperature. Most macroinvertebrate density and composition differences were confined to the channel riffles rather than the pools.
Detailed explanation-4: -Benthic macroinvertebrates are useful indicators of water quality because they can be found in all but the most severely polluted or disturbed habitats and because they have a wide range of pollution tolerances amongst various species.