Research Interests:
The role of top-down predation in structuring lake food webs.
Links
Please visit my research lab.
Select Publications:
Valois A.E., Keller W., and Ramcharan C.W. In press. Recovery in a multiple stressor environment: using the reference condition approach to examine zooplankton community change along opposing gradients. J. Plankton Res.
Boeing, W.J., and Ramcharan C.W. In press. Inducible defenses are a stabilizing factor for predator and prey populations: a field experiment. Freshwater Biology
Valois A., Keller B., and Ramcharan C.W. 2010. Abiotic and biotic processes in lakes recovering from acidification: the relative roles of metal toxicity and fish predation as barriers to zooplankton re-establishment. Freshwater Biology 55: 2585-2597.
Boeing, W.J., Wissel B., and Ramcharan C.W. 2010. Can costs and benefits of Daphnia defense against fish be measured in a field experiment? Fundamental and Applied Limnology 176: 1-10.
Luek A., Morgan G., Wissel B., Gunn J., Ramcharan C.W. 2010. Rapid and unexpected effects of piscivore introduction on trophic position and diet of perch (Perca flavescens) in recovering lakes. Freshwater Biology 55: 1616-1627.
Yan N.D., Girard R., Ingram R., Paterson A., Somers K., Ramcharan C., Rusak J., Morgan G., Gunn J. 2008. Long-term changes in crustacean zooplankton communities of Dorset, Ontario lakes: the probable interactive effects of changes in acidity, phosphorus, DOC, and introduced predators. Can. J. Fish. Aquat. Sci. 65: 862-877.
Paterson A., Winter J., Nicholls K., Clark B., Ramcharan C.W., Yan N.D., Somers K. 2008. Long-term changes in phytoplankton composition in seven Canadian Shield lakes in response to multiple anthropogenic stressors. Can. J. Fish. Aquat. Sci. 65: 846-861.
Boeing W.J., Ramcharan C.W., Riessen H.P. 2006. Clonal variation in depth distribution of Daphnia pulex in response to predator kairomones. Archiv für Hydrobiologie 166:241-260.
Boeing W.J., Ramcharan C.W., Riessen H.P. 2006. Multiple predator defense strategies in Daphnia pulex and their relation to native habitat. J. Plank. Res. 28: 571-584.
McQueen D.J., Hyatt K.D., Ramcharan C.W., Rankin P. 2006. Changes in algal species composition affected juvenile sockeye salmon production at Woss Lake, British Columbia: a lake fertilization and food web analysis. North Amer. J. Fish. Manag. 103:786-798.
Boeing W.J., Wissel B., Ramcharan C.W. 2005. Costs and benefits of Daphnia defense against Chaoborus in nature. Can. J. Fish. Aquat. Sci. 62: 1286-1294.
Hyatt K.D., Ramcharan C.W., McQueen D.J., and Cooper K.L. 2005. Trophic triangles and competition among vertebrate (Oncorhynchus nerka, Gasterosteus aculeatus) and macroinvertebrate (Neomysis mercedis) planktivores, in Muriel Lake, British Columbia, Canada. Ecoscience 12:11-26.
Wissel, B., and Ramcharan, C.W. 2003. Plasticity of vertical distribution of crustacean zooplankton in lakes with varying levels of water color. J. Plank. Res. 25: 1047-1057.
Wissel, B., Yan, N.D., and Ramcharan, C.W. 2003. Predation and refugia: implications for Chaoborus abundance and species composition. Freshwat. Biol. 48: 1421-1431.
Wissel, B., Boeing, W.J., and Ramcharan, C.W. 2003. Effects of water color on predation regimes and zooplankton assemblages in freshwater lakes. Limnol. & Oceanogr. 48: 1965-1976.
Sutor, M., and Ramcharan, C.W. 2001. Effects of natural densities of 4th-instar Chaoborus trivittatus on a freshwater zooplankton assemblage. Hydrobiologia 464: 121-131.
Allen Y.C., Thompson B.A., and Ramcharan C.W. 1999. Growth and mortality rates of the zebra mussel, Dreissena polymorpha, in the Lower Mississippi River. Canadian Journal of Fisheries and Aquatic Sciences 56:748-759.
Current graduate student projects in my lab:
Andreas Luek (Ph.D.) - The dual implications of depauperate benthos and high piscivory for recovering populations of fishes in Sudbury lakes.
Jaimee Bradley (M.Sc.) - The effects of urbanization on phytoplankton populations of lakes in a landscape recovering from historical industrial damage