Journal
ECOLOGY
Volume 85, Issue 8, Pages 2100-2106Publisher
WILEY
DOI: 10.1890/04-0151
Keywords
Daphnia pulicaria; diatoms; energy flux; food web; Keratella cochlearis; match; mismatch; phenology; plankton; timing
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The largest uncertainty in forecasting the effects of climate change on ecosystems is in understanding how it will affect the nature of interactions among species. Climate change may have unexpected consequences because different species show unique responses to changes in environmental temperatures. Here we show that increasingly warmer springs since 1962 have disrupted the trophic linkages between phytoplankton and zoo-plankton in a large temperate lake because of differing sensitivity to vernal warming. The timing of thermal stratification and the spring diatom bloom have advanced by more than 20 days during this time period. A long-term decline in Daphnia populations, the keystone herbivore, is associated with an expanding temporal mismatch with the spring diatom bloom and may have severe consequences for resource flow to upper trophic levels.
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