Effects of predators and food supply on diel vertical migration of Daphnia

M. L. Dini, P. A. Soranno, M. Scheuerell, S. R. Carpenter

Research output: Contribution to journalArticle

14 Scopus citations

Abstract

Diel vertical migration (DVM) affects food availability for planktivores, grazing pressure on phytoplankton and the rate of nutrient regeneration by herbivores. Fish manipulations, especially minnow reintroduction in Tuesday Lake, Wisconsin, confirmed the primary importance of visual predation in determining migratory behavior. Once planktivorous fish were removed from Tuesday Lake in 1985, formerly rare daphnids dominated the zooplankton and exhibited highly varibale DVM. Soon after removal of all fish and subsequent reintroduction of minnows in 1987, Daphnia performed strong nocturnal migrations. These intensified in amplitude over two subsequent summers until 1990, when rebounding minnow populations made Daphnia in this lake too rare to study. -from Authors

Original languageEnglish
Pages (from-to)153-171
Number of pages19
JournalUnknown Journal
DOIs
StatePublished - 1993

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