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GLIN==> SEMINAR - JANUARY 16 (Ann Arbor)



SEMINAR ANNOUNCEMENT

NOAA GREAT LAKES SEMINAR SERIES
(Co-sponsored by the NOAA Great Lakes Environmental Research 
Laboratory (GLERL), the University of Michigan Cooperative Institute 
for Limnology and Ecosystems Research (CILER), and the Great Lakes Sea 
Grant Network).

Title:
"Ballast Water Deoxygenation Can Prevent Aquatic Introductions While 
Reducing Ship Corrosion"

Speaker:
Dr. Mario N. Tamburri, Chief Scientist
Alliance for Coastal Technologies
Chesapeake Biological Laboratory
University of Maryland Center for Environmental Science

Date: Thursday, January 16, 2003

Time: 10:30 a.m.

Where:
GLERL Main Conference Room
2205 Commonwealth Blvd.
Ann Arbor, MI  48105
For directions:
       http://www.glerl.noaa.gov/facil/triptik.html

Abstract:
One of the most important mechanisms for the introduction of aquatic 
nuisance species is transport in ship ballast waters. Although several 
ballast tank treatments to prevent transport of aquatic organisms 
appear promising, all existing approaches will result in significant 
costs to the shipping industry. This seminar will describe a treatment 
that can dramatically reduce the survivorship of most organisms found 
in ballast waters while providing economic benefits to ship owners.
Purging of oxygen from ballast tanks with nitrogen was recently found 
to be a cost-effective technique for reducing corrosion and therefore 
extending ship life. We tested the tolerance of larvae of known 
invasive invertebrate species to low levels of oxygen, comparable to 
those resulting from this anticorrosion treatment, and detected 
significant levels of mortality. Two separate literature reviews 
further support the conclusion that few organisms will be able to 
withstand extended periods of exposure to nitrogen treated ballast 
water. This novel deoxygenation technique may therefore have direct 
benefits to both marine conservation and the shipping industry. 
Currently investigation are being initiated to optimize the oxygen 
stripping process, to examine Microbially Influenced Corrosion under 
hypoxia, and to examine deoxygenations's effectiveness at removing 
ballast water organisms onboard active vessels.

Contact:
Dr. David Reid
734-741-2019
david.reid@noaa.gov


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