How Can Determine The Health Of The Stream Macroinvertebrates?

How Can Determine The Health Of The Stream Macroinvertebrates? 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. What macroinvertebrates indicate good water quality? Macroinvertebrates indicate excellent, good,