Describe how determining macroinvertebrate populations help in ...

[joe]

Describe how determining macroinvertebrate populations help in detecting water pollution
 
  What will be an ideal response?

Question 2

Describe how macroinvertebrates are classified.
 
  What will be an ideal response?

[isabelt_18]

Answer to Question 1

Sample the macroinvertebrates using a trap of some kind. Small hand-held nets (like a butterfly net) are sometimes
used. Pollution-intolerant species populations are reduced in polluted water, as compared to pollution-tolerant
species, which maintain normal levels.

Answer to Question 2

One way of classifying macroinvertebrates is in terms of their reaction to pollution. Using this system, we can
classify macroinvertebrates into three groups.
 Group 1 organisms are pollution intolerant and easily killed by impurities in the water.
 Group 2 organisms are somewhat pollution tolerant and can survive in slightly polluted water.
 Group 3 organisms are pollution tolerant and can survive in all but the most heavily polluted water.

[joe]

Thanks

[isabelt_18]

Welcome