The NOAA - U of M Great Lakes Seminar Series
is pleased to announce a new
special focus seminar series, "Coastal Hypoxia: Lake Erie and
Beyond." The series will focus on the growing problem of hypoxia in
aquatic coastal environments, with primary emphasize
on Lake Erie and coastal zones of North America. However, we start with
presentations by Dr. Robert Diaz, who will provide a global
perspective, and Dr. Don Scavia, who will discuss hypoxia forecast
Thursday, October 19, 10:30 am
Speaker: Dr. Robert Diaz
Professor of Marine Science at Virginia Institute of Marine Science
Title: "The global hazards of eutrophication and hypoxia"
Abstract: Development associated with human populations has led to the globalization of many environmental problems. In marine systems, the most serious of these problems are directly related to the process of eutrophication. The increased production of organic matter in these marine systems associated with eutrophication is the primary factor impacting species abundance and composition and dissolved oxygen budgets. Oxygen, which is essential to maintaining balance in ecosystem processes through its role in mediating microbial and metazoan activities, has declined to critically low levels in many systems, which has led to the development of hypoxia (<2 ml O2/l) and anoxia (0 ml O2/l). Currently, most oxygen depletion events are seasonal, but trends toward longer periods that could eventually lead to persistent hypoxic or anoxic conditions are emerging. Over the last 50 years, there has been an increase in the number of systems reporting problems associated with low dissolved oxygen. Currently there are close to 200 hypoxic/anoxic areas around the globe, ranging in size from <1 km2 to 70000 km2, that exhibit a graded series of responses to oxygen depletion, ranging from no obvious change to mass mortality of bottom fauna. Ecosystems currently severely stressed by eutrophication induced hypoxia continue to be threatened with the loss of fisheries, loss of biodiversity, alteration of food webs, and simplification of energy flows.
Tuesday, October 24, 10:30 am
Speaker: Dr. Don Scavia
Professor of Natural Resources and Environment at the University of Michigan, Director of the Michigan Sea Grant Program, and Interim Director of the Cooperative Institute for Limnology and Ecosystems Research.
Title: "Predicting coastal hypoxia: applications of Occham's Razor."
Abstract: To be useful, hypoxia forecast models should be scaled to the spatial and temporal frames of decision makers. It is also important to understand and quantify the certainty in such models before they can be used in forecasts and as a basis for estimating ecological impact. We have successfully applied a very simple model formulation for predicting hypoxia extent in the Chesapeake Bay and the northern Gulf of Mexico, and will describe their basis, application, and testing. The strengths and weaknesses of simple vs. more complex models will be discussed in the context of their utility for forecasts and for supporting impact assessment.
Please see http://www.glerl.noaa.gov/news/seminars/ for location and directions.
-- David F. Reid, Ph.D. Senior Research Scientist Director, NOAA National Center for Research on Aquatic Invasive Species Task Leader, GLERL Nonindigenous Species Program Member, NOAA Invasive Species Program Management Team U.S. Department of Commerce National Oceanic and Atmospheric Administration Great Lakes Environmental Research Laboratory 2205 Commonwealth Blvd. Ann Arbor, MI 48105-2945 Voice: 734-741-2019 FAX: 734-741-2055 GLERL home page: http://www.glerl.noaa.gov* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * glin-announce is hosted by the Great Lakes Information Network (GLIN): http://www.great-lakes.net To subscribe: http://www.glin.net/forms/glin-announce_form.html To post a message: http://www.glin.net/forms/glin-announce_post.html To search the archive: http://www.glin.net/lists/glin-announce/ All views and opinions presented above are solely those of the author or attributed source and do not necessarily reflect those of GLIN or its management. * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *