Linking Regime Shifts to Carbon Dynamics in Lake Erie

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Presentation transcript:

Linking Regime Shifts to Carbon Dynamics in Lake Erie A new NSERC-Strategic Project (2013-16)

The team *supporting organization Co-Applicants Affiliation Role Dr. M.A. Xenopoulos Biology, Trent University Project coordination (PI); Carbon balance, Biogeochemistry Dr. Paul Frost Food web stoichiometry; zooplankton Dr. Doug Haffner GLIER, University of Windsor Primary production/contaminant transfer Collaborators Dr. Chris Marvin Dr. Susan Watson Environment Canada* Sediments/Contaminants Cyanobacteria, primary production, limnology Dr. Marten Koops Fisheries and Oceans Canada* Invasion ecology, modeling Dr. Todd Howell Ontario Ministry of the Environment* Benthic-Pelagic coupling Dr. James Larson U.S. Geological Survey (USA) Lake-Rivers interaction (USA link) Dr. Michael Twiss Clarkson University (USA) Winter limnology and primary productivity of Lake Erie (USA link) *supporting organization

Construct a carbon balance Objectives To determine the current carbon and material pathways in the foodwebs of Lake Erie. short-term objectives: 1) sample foodwebs and determine primary energy pathways and transfer efficiencies 2) couple these data on foodwebs to lake metabolism measurements 3) quantify contemporary surface CO2 emissions and carbon burial rates measurements from the past. long-term objectives: 1) construct a whole-lake carbon mass balance of Lake Erie to use in future management plans 2) join regime shift projections with our current carbon cycling and foodweb data to better understand contaminant movement and trophic transfer 3) develop a framework for understanding regime shifts in large aquatic systems that can be applied to other large Canadian lakes (e.g., Lake Winnipeg) or coastal waters experiencing regime shifts. Construct a carbon balance

Focus on carbon: why? Carbon = energy A relatively understudied element for Lake Erie Carbon balance: WHERE is the carbon coming from, where is it going? How does it relate to N and P Linkages with contaminants YES- IT is an impossible task but preliminary numbers are needed

WHY REGIME SHIFTS?

Immediate opportunities PDF position Four graduate positions (1 MSc, 3 PhD)

Isolating factors can get us in trouble Focus on reducing P But increasing N

Other opportunities Proposal weakness Biological/food web measurements Temporal resolution Spatial resolution offshore vs nearshore Mussel biomass/ fish (will have to rely on collaborators) Storm events? Input/output of C

Short-term Timeline Now-May 2014: Complete recruitment of HQP Winter 2014: Winter Carbon Budgets on CCGS Griffin May 2014, August 2014 and October 2014: Field work on CCGS Limnos

Advisory Committee Project Advisory Committee Affiliation Role Dr. William D. Taylor University of Waterloo and Canadian co-chair, Great Lakes Science Advisory Board, International Joint Commission Advice on project priorities and approaches International liaison Dr. Noel Urban Michigan Tech University Dr. Don Scavia University of Michigan Dr. Craig Stow NOAA Dr. Rick Bourbonniere Environment Canada

Contact us Maggie Xenopoulos (mxenopoulos@trentu.ca) Andrew Scott (andrewscott@trentu.ca)