picture of Russell Hopcroft

Russell Hopcroft

Chair, Department of Oceanography


Biological Oceanography
Marine Biology
Marine Invertebrates
College of Fisheries and Ocean Sciences
Institute of Marine Science
120 O'Neill
Fairbanks, AK 99775-7220
907-474-7204 (fax)
Office Hours
120 O'Neill
Curriculum Vitae
Ershova, E.A., J.M. Questel, K.N. Kosobokova, and R.R. Hopcroft. 2017. Population structure and production of four sibling species of Pseudocalanus spp. in the Chukchi Sea. Journal of Plankton Research. 39(1):4864. doi: https://doi.org/10.1093/plankt/fbw078

Smoot, C.A., and R.R. Hopcroft. 2017. Depth-stratified community structure of Beaufort Sea slope zooplankton and its relations to water masses. Journal of Plankton Research. 39(1):7991. doi: https://doi.org/10.1093/plankt/fbw087

Smoot, C.A., and R.R. Hopcroft. 2017. Cross-shelf gradients of epipelagic zooplankton communities of the Beaufort Sea and the influence of localized hydrographic features. Journal of Plankton Research. 39(1):6578. doi: https://doi.org/10.1093/plankt/fbw080

Li, K.Z., A.J. Doubleday, M.D. Galbraith, and R.R. Hopcroft. 2016. High abundance of salps in the coastal Gulf of Alaska during 2011: A first record of bloom occurrence for the northern Gulf. Deep Sea Research II. 132:136-145. doi: https://doi.org/10.1016/j.dsr2.2016.04.009

Questel, J.M., L. Blanco-Bercial, R.R. Hopcroft, and A. Bucklin. 2016. Phylogeography and connectivity of the Pseudocalanus (Copepoda: Calanoida) species complex in the eastern North Pacific and the Pacific Arctic Region. Journal of Plankton Research. 38(3):610623. doi: https://doi.org/10.1093/plankt/fbw025

Sousa, L., K.O. Coyle, R.P. Barry, T.J. Weingartner, and R.R. Hopcroft. 2016. Climate-related variability in abundance of mesozooplankton in the northern Gulf of Alaska 19982009. Deep Sea Research II. 132:122135. doi: https://doi.org/10.1016/j.dsr2.2016.04.006

Ershova, E.A., R.R. Hopcroft, K.N. Kosobokova, K. Matsuno, R.J. Nelson, A. Yamaguchi, and L.B. Eisner. 2015. Long-term changes in summer zooplankton communities of the western Chukchi Sea, 19452012. Oceanography. 28(3):100115. doi: https://doi.org/10.5670/oceanog.2015.60

Wassmann, P., K.N. Kosobokova, D. Slagstad, K. Drinkwater, R.R. Hopcroft, S.E. Moore, I. Ellingsen, R.J. Nelson, E. Carmack, E. Popova, and J. Berge. 2015. The contiguous domains of Arctic Ocean advection: trails of life and death. Progress in Oceanography. 139:4265. doi: https://doi.org/10.1016/j.pocean.2015.06.011

Nelson, R.J., C.J. Ashjian, B.A. Bluhm, K.E. Conlan, R.R. Gradinger, J.M. Grebmeier, V.J. Hill, R.R. Hopcroft, et al. 2014. The Pacific Arctic Region: Ecosystem Status and Trends in a Rapidly Changing Environment. Biodiversity and biogeography of the lower trophic taxa of the Pacific Arctic region: Sensitivities to climate change. Ed. J.M. Grebmeier and W. Maslowski. :239-336. Springer,

Hunt, G.L., A.L. Blanchard, P. Boveng, P. Dalpadado, K.F. Drinkwater, L. Eisner, R.R. Hopcroft, K.M. Kovacs, B.L. Norcross, P. Renaud, M. Reigstad, M. Renner, H.R. Skjoldal, A. Whitehouse, and R.A. Woodgate. 2013. The Barents and Chukchi Seas: Comparison of two Arctic shelf ecosystems Journal of Marine Systems. 109:4368. doi: https://doi.org/10.1016/j.jmarsys.2012.08.003

  • trophodynamics
  • midwater ecology
  • zooplankton
  • Arctic and subarctic ecosystems
Research Overview
My primary interests focus on the composition, production and energy flow of pelagic ecosystems. More simply, my research explores the questions "How do planktonic communities work," "How much energy do they process," "Who''s really important," "How do communities vary temporally and spatially," and increasingly "How do communities change in response to climate." I am also recognized as a taxonomic authority on several groups of zooplankton globally, and for Arctic zooplanktonic biodiversity in general.

My research efforts have often focused on determining the rates of growth and egg production for the dominant zooplankton (copepod and euphausiid crustaceans), such as in the Gulf of Alaska within the Northeast Pacific GLOBEC program. The ultimate purpose of this research is to establish the rates of secondary production for this region. In conjunction with the long-term observation program funded by NSF 19972004 and still continuing through NPRB, AOOS and NOAA, the goal is to establish the production of the more dominant zooplankton species, how this varies from year to year, or long-term, and how this may influence fisheries production.

At present, the majority of my research is focused on the Arctic Ocean. With NOAA''s Ocean Exploration program an ROV was used in conjunction with traditional plankton nets to explore the full spectrum of zooplankton including the more fragile gelatinous plankton in the western Arctic in 2002 and 2005. I continue to be involved in joint US/Russian cruises in the Chukchi Sea north of Bering Strait. Environmental baseline studies for industry in the Chukchi and Beaufort Seas are also ongoing. Other projects are working to consolidate zooplankton data throughout the Arctic and model the distribution of key zooplankton species over the past decades.

I am actively involved in the Census of Marine Life through steering committees of the Arctic Ocean Diversity project (ArcOD), the Census of Marine Zooplankton (CMarZ), and the Census of Antarctic Marine Life (CAML). Images of live zooplankton collected on these activities are widely distributed. All these activities contribute to ongoing global efforts for molecular barcoding of every zooplankton species.
  • Greenland Climate Research Center
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