Movement and dispersion of insects in stream channels: what role does flow play?
CABI | Published : 2008
Abstract The interplay between landscape and movement can have far-reaching consequences for populations, so an understanding of movement (or lack of) is fundamental. Flow forces create heterogeneity within stream channels - the movement and spatial distribution of insects is related to this flow and topographic heterogeneity. No stream insects are sessile, all are mobile. Researchers often describe large-scale distribution patterns (e.g. abundance in riffles versus pools), but these may arise from small-scale movements and the insect's perception of the environment is only ever small-scale. The crawling behaviour of at least some insects (e.g. cased caddisflies) is influenced by mic..View full abstract