Acknowledgements

We thank L. Schiesari and over 20 undergraduate research assistants for field assistance and enumeration of zooplankton. We thank the Ecology and Evolutionary Biology department of the University of Michigan for use of the E. S. George Reserve. This work was supported by the National Science Foundation DEB-0089809 and DEB-1145808. S. D. Peacor acknowledges support from AgBioResearch of Michigan State University.