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GLIN==> Upcoming seminars: 9/17, 9/20, 9/21



Posted on behalf of Cathy Darnell <darnell@glerl.noaa.gov>

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GLERL Seminar Series

presents


Dr. Stephen Lozano, US EPA, National Health and Environmental Effects
Research Lab, Duluth, MN

"The Ecological Condition of Lake Ontario: An EMAP Experience"

Friday, Sept. 17, 1999, 11-12:00 a.m., Main Conference Room

Benthic invertebrates play a critical role in the Lake Ontario
ecosystem including carbon transfer up the food chain and cycling of
nutrients between the sediments and water. The recent invasion of
Dreissena polymorpha and D. bugensis into Lake Ontario has brought
about dramatic changes in abundance and distribution of important
benthic species whose populations have been extirpated from a
contiguous zone around the lake, encompassing over 40% of the total
surface area of soft sediments.  Mean declines in Diporeia, Oligochaeta
and Sphaeriidae ranged from 40% to 100% at all depths.  It appears that
Dreissena has disrupted the Lake Ontario food chain with major
consequences to benthic invertebrate species and forage fish that
depend upon Diporeia for food.


Sergei Rodionov, NRC Senior Research Associate GLERL

"Global and Regional Climate Interaction: From a General Concept to
Practical Applications"

Monday, Sept. 20, 1999, 10-11:00 a.m., Main Conference Room (105)

World Weather is a concept that describes an interdependency between
weather and climate anomalies in different parts of the world separated
by large distances. This interdependency, commonly known as a
teleconnection, was first suggested at the turn of the century, but for
a long time remained just an idea of little practical use. Recent
improvements in the quality and availability of data, global monitoring
of climatic processes, advances in statistical techniques, and more
powerful computing resources have made teleconnections one of the
central research topics in modern climatology. Four examples
demonstrate that interaction between global and regional climates is
key to understanding and predicting variability in environmental
parameters at the regional level. These examples are: fisheries in the
North Atlantic, water level fluctuations in large lakes,  winter
precipitation over the Great Lakes basin, and Great Lakes ice cover
forecasting.



Dr. John Gannon, USGS Great Lakes Science Center, Ann Arbor, MI

"Great Lakes Aquatic Habitat Protection and Restoration: Scientific and
Policy Research Challenges and Opportunities"

Tuesday, Sept. 21, 1999, 11-12:00 a.m., Main Conference Room

Habitat protection and restoration is emerging as one of the top
resource management issues in the Great Lakes along with toxic
contaminants and exotic species. Yet, habitat continues to "fall
between the cracks" scientifically between the fields of limnology and
fisheries ecology and institutionally between water quality and
fisheries resources management agencies. Habitat is defined as the
physicochemical and biological characteristics where a particular 
species lives, but the 3-dimensional aspect of aquatic habitat and
changes in habitat use seasonally and at different life history stages
by most biota make aquatic habitat more difficult to investigate in
comparison with wetland and terrestrial habitats. Research is needed to
better define habitat usage by many aquatic species to assist resource
agencies in identifying relatively "pristine" critical habitats for
habitat protection and species management programs. Research
opportunities are excellent for working on the rehabilitation of
degraded habitats by taking advantage of new approaches being developed
in wetland and terrestrial habitats from the comparatively new fields
of ecological engineering and restoration ecology. From a Great Lakes
policy perspective, it is encouraging that habitat is becoming the
issue of common dialogue between the International Joint   Commission
and the Great Lakes Fishery Commission through their respective
programs of Remedial Action Plans (RAPs) in the Areas of Concern (AoCs)
and Fish Community Goals (FCGs).


Contact:  Steve Brandt 734-741-2244
Great Lakes Environmental Research Laboratory
2205 Commonwealth Blvd.
Ann Arbor, MI 48105



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