Dr. Richard B. Rivkin
I have studied various aspects of biological oceanographic processes for over 20 years. During this period, my research interests have evolved and expanded and range from studies on the nutrient metabolism, photoadaptations of photosynthesis, carbon metabolism and cell division of phytoplankton from natural populations in temperate and tropical oceans and in Antarctica to the relationships among primary producers and procaryotic and eukaryotic microheterotrophs, and the regulation of growth and loss processes of bacteria in various cold ocean regions. As part of my individual Research Grant program and a number of large collaborative projects (Canadian Joint Global Ocean Flux Study and International North Water Polynya Program) I have studied these processes in Newfoundland coastal waters, in the Gulf of St. Lawrence, the northeast subarctic Pacific and several sites in the high Arctic. My research is highly interdisciplinary and focuses on addressing large scale questions concerning the transformation of organic matter in the sea, biogeochemical cycling of biogenic carbon and the role of microbial trophic pathways in regulating the biological pump in the World Oceans. My current research activities are described in more detail on the following link.
Lizotte, M.; Levasseur, M.; Michaud, S.; Scarratt, M.G.; Merzouk, A.; Gosselin, M.; Pommier, J.; Rivkin, R.B.; Kiene, R.P. (2012). Macroscale patterns of the biological cycling of dimethylsulfoniopropionate (DMSP) and dimethylsulfide (DMS) in the Northwest Atlantic. Biogeochemistry. 110 (1-3) 183-200. (Click here for Abstract)
Motard-Cote, J.; Levasseur, M.; Scarratt, M.G.; Michaud, S.; Gratton, Y.; Rivkin, R.B.; Keats, K.; Gosselin, M.; Tremblay, J.E.; Kiene, R.P.; Lovejoy, C. (2012). Distribution and metabolism of dimethylsulfoniopropionate (DMSP) and phylogenetic affiliation of DMSP-assimilating bacteria in northern Baffin Bay/Lancaster Sound. Journal of Geophysical Research-oceans. 117 C00G11. (Click here for Abstract)
Seiden, J.M.; Way, C.J.; Rivkin, R.B. (2011). Bacterial dynamics in ballast water during trans-oceanic voyages of bulk carriers: environmental controls. Marine Ecology-progress Series. 436 145-159. (Click here for Abstract)
Rose, K. A.; Allen, J. I.; Artioli, Y.; Brange, M.; Blankford, J.; Rivkin, R. B., and 20 others. (2011). And End-To-End Models for the Analysis of Marine Ecosystems: Challenges, Issues, and Next Steps. Marine And Coastal Fisheries: Dynamics, Management, And Ecosystem Science. 2 115–130.
Hale, M. S.; Keats, K. F.; Li, W. K. W.; Rivkin, R.B. (2011). actors controlling the abundance, production and growth of marine heterotrophic bacteria in the eastern Canadian Arctic. Marine Biogeochemistry: Observations From Near to Fr. AMBIO-Marine Biogeochemistry.
Hamilton, A.; Hale, M. S.; Fones, G. R.; Rivkin, R.B. (2011). The role of microzooplankton grazing in regulating phytoplankton and bacterioplankton biomass in the sub-Arctic Atlantic Ocean. Marine Biogeochemistry: Observations From Near to Fr. Marine Biogeochemistry: Observations From Near To Fr. Ambio-marine Biogeochemistry.
Buitenhuis, E.T.; Rivkin, R.B.; Sailley, S.; Le Quere, C. (2010). Biogeochemical fluxes through microzooplankton. Global Biogeochemical Cycles. 24 GB4015. (Click here for Abstract)
Fu, Y.Y.; MacLeod, D.M.; Rivkin, R.B.; Chen, F.; Buchan, A.; Lang, A.S. (2010). High diversity of Rhodobacterales in the subarctic North Atlantic Ocean and gene transfer agent protein expression in isolated strains. Aquatic Microbial Ecology. 59 (3) 283-293. (Click here for Abstract)
Seiden, J.M.; Way, C.; Rivkin, R.B. (2010). Microbial hitchhikers: dynamics of bacterial populations in ballast water during a trans-Pacific voyage of a bulk carrier. Aquatic Invasions. 5 (1) 13-22. (Click here for Abstract)
Sun, B.; Mouland, R.; Way, C.; Rivkin, R.B. (2010). Redistribution of heterotrophic prokaryotes through ballast water: A case study from the west coast of Canada. Aquatic Invasions. 5 (1) 5-11. (Click here for Abstract)