We investigated the response of caddisfly species assemblages in the middle reaches of the Shinano River to a flood that occurred in mid July 2006. Prior to the flood (on Day -22) the population density of total benthic caddisflies was 8,266.7 ± 2,392.1 individuals m. After the flood, by Day 11, the population density had decreased to 55.6 ± 55.6 individuals m. By Day 65, the density of caddis ...
