1.

The optimum do level of water for aqatic ecosystem is

Answer»

Answer:

5.5 mg/l

Explanation:

The DISSOLUTION of oxygen in the water

should not be LESS than 5.5mg/l.

However, if it drops down from this level, it might cause the AQUATIC life to stress more.

Hence, the LESSER the 'DO' the more will be stress for the aquatic life.

HOPE THIS HELPS!



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