Abstract
ABSTRACT Black, white and red tiles were used to test the hypothesis of no differences in colonization by macroinvertebrates and algae (expressed as chlorophyll a) on substrata of different colors. Aquatic insects made up 95% of the macroinvertebrates on the tiles. Mean number of insects of the most abundant taxa tended to be greatest on the white tiles. There was a significant effect of color on colonization by Cheumatopsyche (Trichoptera) larvae and total numbers of organisms. There was no interaction between tile position and color on density of aquatic insects. There was no effect of tile color on the quantity of chlorophyll a on the tiles.
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