Systemwide Events Calendar
Oceanography Seminar
October 18, 3:00pm - 4:00pmManoa Campus, MSB 100
Hilary Close
SOEST Young Investigator
and NOAA Climate and Global Change Postdoctoral Fellow
Abstract:Rethinking the roles of particulate organic matter in the era of microbial oceanography: lessons from stable isotopes and sampling methodology
Microbes, including Bacteria, are recognized as globally important mediators of elemental transformations in the marine water column, but the contribution of bacterial biomass to the export of organic matter in the ocean is rarely considered to be quantitatively significant. Recent studies have uncovered pathways by which biomass of the smallest plankton in the water column may contribute to export; geochemical evidence for this contribution remains sparse.
Using the largest data set to date for natural 13C content of individual lipids from the marine water column, I compare an exclusively microbial size class of particulate organic matter (POM) to conventional “suspended” POM. Heterogeneity in the isotopic values of intact lipids is associated with particle size and lipid polarity, and by extension, must arise from the composition of the plankton community. I will present a simple model to quantitatively explore the sinking vs. in situ origin of submicron POM in the Eastern Tropical North Pacific, also highlighting the roles of low-oxygen microbial metabolisms and metazoan migration in contributing to POM at mesopelagic depths.
Ticket Information
Free
Event Sponsor
Oceanography, Manoa Campus
More Information
956-7633
| Thursday, October 18 | |
| 7:30am | The Wellness Center - Fitness Class Schedule Maui Campus, Pilina Bldg., Wellness Center |
| 9:00am | Political Science Final Oral Manoa Campus, Saunders 624 |
| 9:30am | 9th Circuit Hearings Manoa Campus, Moot Courtroom |
| 12:00pm | Homer's Odyssey: War, Biography, Disability, and The Best Years of Our Lives Manoa Campus, Center for Korean Studies Auditorium |
| 1:00pm | Education Final Oral Manoa Campus, 1776 University Avenue, Wist Hall 130 |
| 3:00pm | History Final Oral Manoa Campus, Sakamaki A201 |
| 3:00pm | Oceanography Seminar Manoa Campus, MSB 100 |
| 3:00pm | American Studies Information Session on Careers: LAW Manoa Campus, Moore Hall 323 |
| 3:30pm | LBO General Meeting Manoa Campus, WRSL SR 1 |
| 4:00pm | Conflict Resolution Day 2012 Book Signing Manoa Campus, Saunders Hall Courtyard |
| 4:30pm | Mathematics Final Oral Manoa Campus, Keller 404 |
| 5:30pm | ABIT Open House Maui Campus, Ka Lama 103 |
| 6:00pm | iCAN Open House Windward Campus, Hale Kuhina 106 Conference Room |
| 7:30pm | HamSlam! Manoa Campus, Hamilton Library Sunroom |
October 2012 - Highlighted dates have scheduled events.
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