Virtual Seminar: Dr. Kenny Rose (Professor, UMCES-HPL)

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Virtual Seminar: Dr. Kenny Rose (Professor, UMCES-HPL)

September 29, 2021 at 3:00pm to at 4:00pm
Host: 

Speaker: Dr. Kenny Rose (Professor, UMCES-HPL)

Title: Scaling Laboratory Measurements to the Field and Beyond

Much of the fundamental data on stressor effects on aquatic organisms originates from laboratory experiments.  A long-standing challenge has been how to relate the laboratory endpoints to ecologically-relevant outcomes.  I present three examples of using agent-based modeling to scale laboratory effects of stressors (contaminants, ocean acidification) to fish responses.  The first example uses a model of the endocrine system of an individual female fish that predicts the cumulative vitellogenin (a precursor to yolk) produced over the spawning season.  The effects of PCBs, cadmium, and hypoxia, which affect different parts of the endocrine system, are compared using this common currency of vitellogenin production. The second example expands to life stage responses by simulating 1000’s of individual fish to examine the effects of methylmercury and PCBs on the duration and survival of the larval fish life stage. Thousands of individuals are simulated daily through feeding (multiple prey types), bioenergetics growth, and mortality (three predator types) processes for up to 50 days.  Contaminant effects measured on swim speeds and the fright response of larvae to a predator (behavioral effect) are incorporated into the model by their effect on the encounters of each larva with their prey and their predators. The third example goes further and simulates individuals (hourly for larvae, annual for adults) through their entire life cycle for 100-150 year projections. The effects of ocean acidification on fish eggs and larvae from multiple laboratory experiments are used to impose changes in growth and survival.  The historical record that included warming is simulated to predict the combined effects of warming and ocean acidification; additional simulations of each decade repeated many times allowed for separation of warming and ocean acidification effects.  I conclude with a brief discussion of the usefulness of agent-based modeling for scaling, and several important topics not covered.

If you would like to attend virtually, please email imetdirectorsoffice@umces.edu


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