Density and composition of macroinvertebrate populations were examined prior to and during the migration and spawning of coho and chinook salmon in a small stream in Michigan. Data gathered from bottom samples indicated that disruption of substrate in the experimental area resulted in a significant decrease in the numbers and species of the macroinvertebrate community. This reduction of invertebrates can create a severe stress on native trout populations.
Denison, Douglas L. and Meier, Peter G.
"Effects of Salmon Spawning Activity on Macroinvertebrates in a Small Michigan Stream,"
The Great Lakes Entomologist: Vol. 12
, Article 10.
Available at: http://scholar.valpo.edu/tgle/vol12/iss1/10