Plankton trophic dynamics in Chesapeake Bay: Top down vs. bottom up control of copepod populations
Principal Investigator:Jennifer E. Purcell
Start/End Year:1990 to 1994
Institution:Horn Point Laboratory, University of Maryland Center for Environmental Science
Co-Principal investigator:Michael R. Roman, Horn Point Laboratory, University of Maryland Center for Environmental Science
We propose to determine if the control of copepod populations in the spring and fall are due to predation by gelatinous zooplankton (top-down control), or due to food limitations (bottom-up control). We will measure predation rates on copepods and ctenophores by gelatinous species, biomass of gelatinous and crustacean zooplankton, copepod grazing rates on phytoplankton, protozoa and detritus, and copepod reproduction.