Question

I'm trying to hypothesize what caused a fishkill. Is it possible that chemicals can raise the temperature of a river?, causing lower oxygen levels? This seems a bit far-fetched, but I'm wondering if this could happen. Thank you.

Answer 1

I think you're on the right track. Check out these sites for causes of fish kill.

(Broken Link Removed)

http://www.sciencecases.org/fishkill/fishkill.asp

http://www.ext.vt.edu/pubs/fisheries/420-252/420-252.html