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• Trophodynamics
• Midwater ecology
• Zooplankton
• Arctic and subarctic ecosystems

• Daniel Cushing
• Emily Stidham

• Alex Poje
• Jenn Questel
• Caitlin Smoot
• Elizabeth Stockmar

Jaspers, C., Hopcroft, R.R., Kiorboe, T., Lombard, F., Lopez-Urrutia, A., Everett, J.D. and Richardson, A.J. 2023. Gelatinous larvacean zooplankton can enhance trophic transfer and carbon sequestration. Trends Ecol. Evol.

Cotea Islas, H.M. and Hopcroft, R.R. 2023. Abundance, composition and distribution of predatory gelatinous zooplankton in the Northern Gulf of Alaska. J. Plankton Res., 45, 693-708.

Cushing, D.A., Kuletz, K.J., Sousa, L., Day, R.H., Danielson, S.L., Labunski, E.A., and Hopcroft, R.R. 2023. Differential response of seabird species to warm- and cold-water events in a heterogenous cross-shelf environment in the Gulf of Alaska. Mar. Ecol. Prog. Ser.

Ducklow, H.W., Cimino, M., Dunton, K.O., Hopcroft, R.R., Ji, R., Miller, A. and Sosik, H.M. 2022. Marine coastal pelagic ecosystem responses to climate variability and change. Bioscience, 72, 827-850.

Suryan, R. M. and 47 others. 2021. Ecosystem response to a prolonged marine heatwave in the Gulf of Alaska. Nature Sci. Rep. 11: 6235

Arimitsu, M. and 21 others. 2021. Heatwave-induced synchrony within forage fish portfolio disrupts energy flow to top pelagic predators. Global Change Biol. 27:1859-1878.

Bucklin, A. and others. 2021. Toward A Global Reference Database of COI Barcodes for Marine Zooplankton. Mar. Biol. 168: 78.

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 zooplankton 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 Alaska waters to help constrain estimates of production of higher tropic levels. 

A large portion of my research has