Tuesday, August 5, 2008: 1:30 PM-5:00 PM
103 AB, Midwest Airlines Center
COS 34 - Biogeochemistry of Aquatic Systems and Nutrient Cycling I
1:30 PMEcosystem metabolism and nutrient concentrations in the Upper Mississippi River: Contrasts between the main channel and backwaters
Jeffrey N. Houser, USGS Upper Midwest Environmental Sciences Center, Lynn A. Bartsch, USGS Upper Midwest Environmental Sciences Center, John F. Sullivan, Wisconsin Department of Natural Resources, William B. Richardson, USGS Upper Midwest Environmental Sciences Center
1:50 PMThe regional and global significance of nitrogen removal in lakes and reservoirs
John A. Harrison, Washington State University - Vancouver, Roxane Maranger, Université de Montréal, Richard A. Alexander, US Geological Survey, Anne E. Giblin, Marine Biological Laboratory, Pierre-Andre Jacinthe, Indiana University-Purdue University, Indianapolis, Emilio Mayorga, Rutgers University, Sybil Seitzinger, Rutgers University, Daniel Sobota, Washington State University - Vancouver, Wil Wollheim, University of New Hampshire
2:10 PMLong-term patterns of stream NO3 and net nitrogen mineralization and nitrification at a nitrogen-saturated hardwood forest site
Frank Gilliam, Marshall University, William Peterjohn, West Virginia University, Mary Beth Adams, USDA Forest Service
2:30 PMBacterial carbon processing in Arctic delta lakes: The effect of dissolved organic carbon subsidies from the littoral zone, the surrounding catchment, and adjacent permafrost-affected soils
Suzanne E. Tank, Simon Fraser University, Lance F.W. Lesack, Simon Fraser University
2:50 PMAn isotope tracer study of nitrogen cycling and foodweb structure in a neotropical stream
Steve A. Thomas, University of Nebraska-Lincoln, Alexander S. Flecker, Cornell University, Ranjan Muthukrishnan, Univeristy of California - Los Angeles, Michael C. Marshall, University of Georgia, Eugenia Zandona, Drexel University, Catherine M. Pringle, University of Georgia
3:10 PMBreak
3:20 PMSeasonal and inter-annual variability in rangeland NEE: Contributions of climatic anomalies and fluctuations in daytime and night-time CO2 fluxes
H. Wayne Polley, USDA, Agricultural Research Service, William Emmerich, USDA, Agricultural Research Service, James A. Bradford, USDA, Agricultural Research Service, Phillip L. Sims, USDA, Agricultural Research Service, Douglas A. Johnson, USDA, Agricultural Research Service, Nicanor Z. Saliendra, U.S. Forest Service, Tony Svejcar, USDA, Agricultural Research Service, Raymond Angell, USDA, Agricultural Research Service, Albert B. Frank, USDA, Agricultural Research Service, Rebecca L. Phillips, USDA, Agricultural Research Service, Keirith Snyder, USDA, Agricultural Research Service, Jack A. Morgan, USDA, Agricultural Research Service
3:40 PMCould a shift in canopy dominance from oaks to red maple impact important ecosystem processes like nitrogen and carbon cycling?
Heather D. Alexander, University of Kentucky, Mary A. Arthur, University of Kentucky
4:00 PMEvaluating effects of changes of climate, land-use and land-cover, and atmospheric nitrogen deposition and methane concentrations on global soil methane consumption
Qianlai Zhuang, Purdue University, Kai Xu, Purdue University, Jinyun Tang, Purdue University
4:20 PMBiogeochemical consequences of bark-beetle infestation in Colorado forests
Dennis S. Ojima, The H John Heinz III Center for Science, Economics, and the Environment, Robin H. Kelly, Colorado State University, Thomas H. Riley, Colorado State University

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See more of The 93rd ESA Annual Meeting (August 3 -- August 8, 2008)