Parasites are ubiquitous. They feed on virtually every animal and even on each other. Yet, for all the parasites' collective contributions to biomass and biodiversity, conventional food webs don't account for the presence of these tiny and numerous consumers. A recent study may alter our picture of who-eats-who.
"If you are not including parasites in food webs, you aren't getting the whole picture," said Kevin Lafferty, a marine ecologist with the U.S. Geological Survey, and adjunct professor in the UCSB Department of Ecology, Evolution and Marine Biology (EEMB). "They are consumers like predators, but they are less visible and easy to forget."