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Cover Figure


Cover photograph (Copyright © 2008, American Society for Microbiology. All Rights Reserved.): Composite of differential interference contrast micrographs and colorized scanning electron micrographs of a stream biofilm (750× magnification). Stream biofilms are complex microbial ecosystems for which the diversity and ecological role of ciliates and other protozoa are not well understood. (See related article on page 1740.)


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