Question

Which stream animal is an indicator of poor water quality?

A. a black fly larva

B. a caddis fly larva

C. a May fly larva

D. a riffle beetle​

Answer 1

Answer:

Colorado River Watch Network (CRWN) volunteers test for several key water quality indicators. The resulting water quality data provide baseline information, helps identify trends or changes in water quality, and aids investigations into problems such as nonpoint-source pollution and nutrient enrichment.

LCRA professional monitors conduct similar tests when they evaluate water quality. The testing provides data to LCRA, providing an early warning system for potential water pollution. For detailed information on water quality tests conducted by CRWN volunteers, see the CRWN Water Quality Monitoring Manual.

Ans:- (C)a May fly larva

Answer 2

Answer:

A caddis fly larva animal is an indicator of poor water quality.

Explanation:

• The classic "water quality" indicators that the majority of people are familiar with are physico-chemical markers.
• They consist of nutrients, pH, temperature, salinity, and dissolved oxygen (nitrogen and phosphorus).
• They also contain toxicant measurements, such as those for metals, herbicides, and insecticides.
• Since many algae species and the total biomass of algae are employed as indicators of water quality, algal populations are sensitive to changes in their habitat.
• Volunteers from the Colorado River Watch Network (CRWN) test for a number of important indicators of water quality.
• Frogs are also bioindicators of environmental quality and changes.
• Fundamentally, changes in frogs' freshwater and terrestrial habitats have an impact on them.
• They are crucial bioindicators of ecological quality and change as a result.

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