University of South Carolina College of Arts & Sciences Marine Science Program School of the Earth, Ocean and Environment



Marine Science Program University of South Carolina 712 Main Street, PSC 108, Columbia, SC 29208

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Rykaczewski, Ryan


Assistant Professor, Marine Science Program and Biological Sciences

Ph.D. Scripps Institution of Oceanography, University of California at San Diego, 2009.

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EWS 612




My research focuses on the biological responses to past and future changes in marine ecosystems with an emphasis on pelagic ecology and fisheries oceanography. I aim to uncover the mechanisms through which physical processes force changes in the structure of marine ecosystems, the transfer of energy and organic matter through the marine food web, and the productivity of fish populations.  My program combines oceanographic observations, computer modeling, and ecological theory to understand why populations have varied in the past and project how these populations may respond to future climate change.  My current projects examine the responses of plankton and fish communities to historical variability in coast upwelling systems and consider how these ecosystems may change during the next century.   

Recent Publications:

Hazen, EL, E Jorgensen, RR Rykaczewski, SJ Bograd, DG Foley, ID Jonsen, SA Shaffer, JP Dunne, DP Costa, LB Crowder, and BA Block. 2012. Predicted habitat shifts of Pacific top predators in a changing climate. Nature Climate Change. doi:10.1038/nclimate1686.

Sydeman, W.J., Thompson, S.A., Santora, J.A., Field, J.C., Peterson, W.T., Tanasichuk, R.A., Freeland, H.J., Bograd, S.J., and Rykaczewski, R.R. (2011) Does positioning of the North Pacific Current affect downstream ecosystem productivity? Geophysical Research Letters 38:L12606, doi:10.1029/2011GL047212.

Rykaczewski, R.R., and Dunne, J.P. (2011) A measured look at ocean chlorophyll trends. Nature 472:E5-E6  doi:10.1038/nature09952 [A comment arising from Boyce, D.G., et al. Nature 466:591-296 (2010)].
Decima, M., Landry, M.R., and Rykaczewski, R.R. (2011) Broad-scale patterns in mesozooplankton biomass and grazing in the eastern equatorial Pacific. Deep-Sea Research Part II. 58:387-399,  doi:10.1016/j.dsr2.2010.08.006.
Stock, CA, MA Alexander, NA Bond, K Brander, WWL Cheung, EN Curchitser, TL Delworth, JP Dunne, SM Griffies, MA Haltuch, JA Hare, AB Hollowed, P Lehodey, SA Levin, JS Link, KA Rose, RR Rykaczewski, JL Sarmiento, RJ Stouffer, FB Schwing, GA Vecchi, FE Werner. (2011) On the use of IPCC-class models to assess the impact of climate on living marine resources. Progress in Oceanography 88:1-27, doi:10.1016/j.pocean.2010.09.00.
Rykaczewski, R.R., and Dunne, J.P. (2010) Enhanced nutrient supply to the California Current Ecosystem with global warming and increased stratification in an earth system model. Geophysical Research Letters 37:L21606, doi:10.1029/2010GL045019. 
Rykaczewski, R.R., and Checkley, D.M. (2008)  Influence of ocean winds on the pelagic ecosystem in upwelling regions. Proceedings of the National Academy of Sciences USA. 105:1965-1970.

Courses Taught:

MSCI 210: Oceans and Society

MSCI 450/BIOL 450: Biological Oceanography