Macroinvertebrates in stream systems

[Sastronaut]

Hey pf! Learning about macroinvertebrates and their relation to stream systems, and I am trying to understand what stream factors affect their distribution and diversity! I understand that flow rate, and substrate for example have an affect, but why exactly flow rate affects macro's is still a mystery to me! Are there any entomologists in the house?

Thanks,
Sastronaut

 

[Bystander]

Aeration, temperature, turbidity, ...