Biolunch Seminar, 20 Apr 2021

Tuesday, April 20, 2021

Biological Oceanography Lunch Seminar
Here to stay, or just stopping in? Characterization and mechanisms of El Niño-related zooplankton community change in the Southern California Current System

Laura Lilly
Scripps and OSU

11:30 A.M., via Zoom

ABSTRACT: In this talk, I will present analyses of Southern California Current System zooplankton responses to El Niño events (1950-present) and the 2014-15 Marine Heatwave to address how, when, and why zooplankton communities change. I will discuss whether zooplankton responses dichotomize for Eastern Pacific and Central Pacific El Niño events, as a means to identify the likely dominant forcing mechanisms (advection or in situ reproduction) that cause population changes, and will specifically discuss responses of dominant SCCS euphausiid species to EP and CP Niños. Finally, I will present predictions of future euphausiid spatial distributions based on their habitat ranges and projections of CCS physical changes in the coming century. Understanding the specific oceanographic mechanisms that influence different zooplankton can improve forecasts of changes in community composition during future short-term perturbations and longer-term secular habitat change. I will discuss some of the efforts already underway on these fronts and implications for improved management of fisheries and protected species.

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