Larval transport seminar TODAY

This just in from Dave:

FYI – I’m on Cheryl’s committee at UCSC and she’s working with Satoshi’s CA current in a box sims. Might be of interest. DV

Dear Colleagues,

Our CIRF seminar today at 4pm in ENG II, room 2243, will be:

From the shelf and back again: the kinematics of larval transport

Cheryl Harrison UC Santa Cruz

Abstract Understanding ocean transport of marine species is an important problem in marine ecology, with consequences from genetic connectivity up to marine ecosystem management practices. Many species spawn in fertile upwelling systems such as the California Current, and their offspring (larvae) often require a planktonic stage where they are transported by ocean currents. In upwelling systems, offshore transport is organized into coherent structures such as jets, filaments and eddies that have strong effects on the transport of marine larvae. Here I will discuss the dynamics of offshore larval transport and settlement patterns in an idealized upwelling ocean model. Lagrangian coherent structures (LCS) can identify transport pathways associated with upwelling filaments, and also predict they will be stable to “swimming” perturbation. Eddy-eddy interaction (the so-called inverse cascade) results in dense packets of material that sweep together larvae from a wide range of source regions and release times. Settlement patterns are dominated by the upwelling jet, which acts as a transport barrier—“the tattered curtain”—that is somewhat controlled by upwelling wind relaxation. Finally, mixing measures, both variance and fractal based, are used to assess the patchiness of larval density distributions.

Best wishes, Eckart Meiburg Professor Department of Mechanical Engineering Director, Center for Interdisciplinary Research in Fluids University of California at Santa Barbara Santa Barbara, CA 93106 phone: (805) 893-5278 fax : (805) 893-5278 email: meiburg@engineering.ucsb.edu http://www.me.ucsb.edu/meiburg.html

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About Bruce Kendall

I'm a professor of Environmental Science and Management at the University of California, Santa Barbara. My research is primarily in ecological theory, with a population approach. I work in a number of applications including coastal fisheries, population viability analysis, and conservation biology; I do fundamental theoretical work on the implications of among-individual variability for population dynamics. I'm also an Associate Dean of the Graduate Division at UCSB.
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