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Ecological Thresholds in Aquatic Ecosystems: The Role of Climate Change, Anthropogenic Disturbance, and Invasive Species Progress Review Workshop

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June 7-8, 2007
The Fairmont Washington, DC Hotel

EPA's National Center for Environmental Research (NCER) is sponsoring a meeting to discuss research on ecological thresholds in aquatic ecosystems. This meeting will review the progress of 11 NCER exploratory grants that are developing methods to predict ecological thresholds based on retrospective studies in rivers, lakes, and estuaries. This meeting also will preview 6 new NCER global ecosystem grants that will study the links between climate change and ecological thresholds for linked terrestrial and aquatic systems. Both sets of grants are exploring the effects of threshold exceedances on the respective ecosystems, the services provided by these ecosystems, and methods to manage these resources in the face of potential thresholds. This meeting is open to all who are interested in this new and exciting research area.

For more detailed information on this Workshop see:

Author Presentation Title
Rebecca Clark,
Director, Environmental Sciences Research Division, NCER
Introductory Remarks (PDF)(7 pp, 287 K)
Will Clements,
Colorado State University
Ecological thresholds and responses of stream benthic communities to heavy metals (PDF)(45 pp, 1.3 MB)
Daniel Collins,
Center for Sustainability and the Global Environment,
and Center for Limnology
Eutrophication Thresholds Assessment, Mitigation, and Resilience in Landscapes and Lakes (PDF) (28 pp, 706 K)
M.D. Delong,
Large River Studies Center, Winona State University
Understanding Ecological Thresholds in Aquatic Ecosystems through Retrospective Analysis (PDF)(31 pp, 870 K)
Keith Gido,
Division of Biology, Ackert Hall, Kansas State University
Ecosystem Thresholds and Alternate States in Great Plains Rivers and Streams: Cascading Effects of Anthropogenic Hydrologic Disturbance (PDF)(38 pp, 2.6 MB)
Robert H. Hilderbrand,
Center for Environmental Science Appalachian Lab, University of Maryland
Quantifying Ecological Thresholds and Resilience in Stream Ecosystems (PDF)(46 pp, 625 K)
Roger Mann,
Virginia Institute of Marine Science
Long-term data sets you may wish to examine The Chesapeake Bay and its major fisheries(PDF)(11 pp, 668 K)
Brian McGlynn,
Montana State University
Land Use/Land Cover Change Thresholds Governing Watershed Stream Water Quality (PDF)(33 pp, 5.6 MB)
Adina Merenlender,
University of California, Berkeley
Quantifying Stream Ecosystem Resilience To Identify Thresholds for Salmon Recovery (PDF) (37 pp, 988 K)
Richard Osman,
Smithsonian Enviromental Research Center
Thresholds and Multiple Stable States in Southern New England Shallow Water Communities (PDF)(46 pp, 914 K)
Curtis J. Richardson,
Duke University
A Statistical Methodology for the Detection, Quantification, and Prediction of Ecological Thresholds (PDF) (44 pp, 1.4 MB)
Theodore Smayda,
Graduate School of Oceanography University of Rhode Island
Retrospective Analysis of a Multidecadal Phytoplankton Time Series in Narragansett Bay: Ecological Threshold Responses to Climate and Nutrient Stressors (PDF)(30 pp, 562 K)
Dennis Whigham,
Smithsonian Environmental Research Center
Constructing Probability Surfaces of Ecological Changes in Coastal Aquatic Systems Through Retrospective Analysis of Phragmites australis Invasion and Expansion (PDF)(59 pp, 1.0 MB)
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