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GLIN==> SEMINAR Reminder - June 29 (Ann Arbor)



Title:
NOAA GREAT LAKES SEMINAR SERIES
http://www.glerl.noaa.gov/news/seminars/

Date and Time:
Tuesday, June 29, 10:30 am

Title:
Compartments in Food Webs: How they Help Quantify Structural Changes in the Food Web of Southeastern Lake Michigan after the Invasion of Zebra Mussels and Bythotrephes

Speaker:
Ann Krause
Doctoral Candidate, Michigan State University

Abstract
Compartments in food webs are subgroups of taxa that have many strong interactions with other compartment members; there are few weak interactions between compartments. Compartmentalization increases stability in theoretical food webs, thus it is necessary to understand compartmentalization in empirical food webs and its role as a stabilizing feature in food-web structure. A method from social networking science was used to identify compartments in five established food webs. Three of the five were significantly compartmentalized (a = 0.05). A graphical representation of the food web provided an intuitive understanding of the compartmental structure. This approach was then applied to the food web of southeastern Lake Michigan to determine changes the food-web structure after zebra mussels and Bythotrephes invaded. Data from GLERL, EPA, GLSC, and the Cook Power Plant study were the primary sources of information for constructing the food web. Additional changes in the structure were estimated by calculating the effectiveness of the interactions between taxa and the effectiveness of taxa within the food web and its compartments. These indices help to determine if a few taxa dominate the food web structure.

Where:
GLERL Main Conference Room
2205 Commonwealth Blvd.
Ann Arbor, MI 48105
For directions:

    http://www.glerl.noaa.gov/facil/triptik.html


For more information, contact:
Dr. David Reid
NOAA/GLERL
734-741-2019
david.reid@noaa.gov




-- 
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 Matrix 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
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