Ryan Rykaczewski

Ph.D., Biological Oceanography

2011-2012 Senior Research Fellow (Princeton University)

Supervisory Marine Scientist, NOAA Fisheries, Hawaii
Assistant Professor, University of South Carolina

Ryan Rykaczewski, assistant professor at the University of South Carolina’s Marine Science Program and Biological Sciences program, focuses his research on the responses of ecosystem and fisheries production to past and future climate variability and climate change. This research involves consideration of theory, observations, and models. He holds a PhD from the Scripps Institution of Oceanography at the University of California, San Diego.


Cheung W., Frölicher T., Asch R., Jones M., Pinsky M., Reygondeau G., Rodgers K., Rykaczewski R., Sarmiento J., Stock C., Watson J., 2015, Building confidence in projections of the responses of living marine resources to climate change, Climate Change, Marine Management, ICES Journal of Marine Science, link

Checkley, D., Asch, R., Rykaczewski, R., 2017, Climate, Anchovy, and Sardine, Marine Ecosystem, Climate Change, Annual Review of Marine Science, Volume 9, link

Beaulieu C., Henson S.A., Sarmiento J.L., Dunne J.P., Doney S.C., Rykaczewski R.R., Bopp L., 2013, Factors challenging our ability to detect long-term trends in ocean chlorophyll., Oceanography, Biogeosciences, 10, 2711-2724, DOI 10.5194/bg-10-2711-2013, link

García-Reyes M., Sydeman W.J., Thompson S.A., Black B.A., Rykaczewski R.R., Thayer J.A., Bograd S.J., 2013, Integrated assessment of wind effects on Central California’s pelagic ecosystem., Marine Ecosystem, Oceanography, Ecosystems, 16, 722-735, DOI 10.1007/s10021-013-9643-6, link

McOwen C.J., Cheung W.W.L., Rykaczewski R.R., Watson R.A., Wood J.L., 2014, Is fisheries production within Large Marine Ecosystems determined by bottom-up or top-down forcing?, Marine Ecosystem, Fisheries, Fish and Fisheries, DOI 10.1111/faf.12082

Tommasi, D., Stock, C. A., Hobday, A. J., Methot, R., Kaplan, I. C., Eveson, J. P., Holsman, K., Miller, T. J., Gaichas, S., Gehlen, M., Pershing, A., Vecchi, G. A., Msadek, R., Delworth, T., Eakin, C. M., Haltuch, M. A., Séférian, R., Spillman, C. M., Hartog, J. R., Siedlecki, S., Samhouri, J. F., Muhling, B., Asch, R. G., Pinsky, M. L., Saba, V. S., Kapnick, S. B., Gaitan, C. B., Rykaczewski, R. R., Alexander, M. A., Xue, Y., Pegion, K. V., Lynch, P., Payne, M. R., Kristiansen, T., Lehodey, P., Werner, F. E., 2017, Managing living marine resources in a dynamic environment: The role of seasonal to decadal climate forecasts, Fisheries Management, Climate Change, Progress in Oceanography, 52, 15-49, link

Österblom H., Merrie A., Metian M., Boonstra W.J., Blenckner R., Watson J.R., Rykaczewski R.R., Ota Y., Sarmiento J.L., Christensen V., Schlüter M., Birnbaum S., Gustavsson B.G., Humborg C., Mörth C-M., Müeller-Karulis B., Tomczak M.T., Troell M., Folke C., 2013, Modeling social-ecological scenarios in marine systems., Marine Ecosystem, Fisheries Management, Governance, BioScience, 63, 735-744, DOI 10.1093/bioscience/63.9.735, link

Hazen E.L., Jorgensen E., Rykaczewski R.R., Bograd S.J., Foley D.G., Jonsen I.D., Shaffer S.A., Dunne J.P., Costa D.P., Crowder L.B., Block B.A., 2013, Predicted habitat shifts of Pacific top predators in a changing climate., Marine Ecosystem, Oceanography, Climate Change, Nature Climate Change, 3, 234-238, DOI 10.1038/nclimate1686, link

Stock, C. A., John, J. G., Rykaczewski, R. R., Asch, R. G., Cheung, W. W. L., Dunne, J. P., Friedland, K. D., Lam, V. W. Y., Sarmiento, J. L., Watson, R. A. , 2017, Reconciling fisheries catch and ocean productivity, Fisheries Management, Biodiversity, Policy, PNAS, doi:10.1073, link

García-Reyes M., Sydeman W.J., Black B.B., Rykaczewski R.R., Schoeman D.S., Thompson S.A., Bograd S.J., 2013, Relative influence of oceanic and terrestrial pressure systems in driving upwelling-favorable winds., Marine Ecosystem, Oceanography, Geophysical Research Letters, 40, 5311-5315, DOI 10.1002/2013GL057729, link

Black B.A., Sydeman W.J., Frank D.C., Griffin D., Stahle D.W., García-Reyes M., Rykaczewski R.R., Bograd S.J., Peterson W.T., 2014, Six centuries of variability and extremes in a coupled marine-terrestrial ecosystem, Marine Ecosystem, Oceanography, Science, 345, 1498-1502, DOI 10.1126/science.1253209, link

Fisher J. L., Peterson W. T., Rykaczewski R. R., 2015, The impact of El Niño events on the pelagic food chain in the northern California Current, Marine Ecosystem, Climate Change, Global Change Biologylink

Roberts, S.M., Boustany, A.M., Halpin, P.N., Rykaczewski, R.R. (2019). Cyclical climate oscillation alters species statistical relationships with local habitat. Mar Ecol Prog Ser 614:159-171. link

Responses of Eastern Boundary Current Ecosystems to Anthropogenic Climate Change

Responses of Eastern Boundary Current Ecosystems to Anthropogenic Climate Change

Ryan Rykaczewski University of Tokyo’s Atmosphere and Ocean Research Institute Tokyo, Japan May 20, 2016