2022 Early Hearing Detection & Intervention Virtual Conference
March 13 - 15, 2022
5/27/2021 | 2:00 PM - 3:30 PM | SIGNALS IN THE NOISE: UNDERSTANDING DRIVERS OF CHLOROPHYLL-A IN GREAT LAKES COASTAL WETLANDS | Virtual Platform
SIGNALS IN THE NOISE: UNDERSTANDING DRIVERS OF CHLOROPHYLL-A IN GREAT LAKES COASTAL WETLANDS
Coastal wetlands of the Laurentian Great Lakes are diverse and productive ecosystems that occur over a broad range of environmental conditions. These wetlands provide important ecosystem services but are threatened by anthropogenic factors including nutrient input, land-use change, invasive species, and climate change. We assessed one metric of ecosystem condition – water column chlorophyll-a – in 475 coastal wetlands as part of the Great Lakes Coastal Wetland Monitoring Program. Mean chlorophyll-a concentrations increased on a north-to-south gradient from less developed Lake Superior to more developed Lake Erie, however concentrations varied among sites within lakes. We developed two models of chlorophyll-a concentrations for each lake – one using variables that directly affect phytoplankton (e.g., dissolved nutrients, temperature) and the other using variables with indirect effects (e.g., land use, fetch). Direct and indirect variable models explained 13-46% and 10-53% of variation, respectively, in chlorophyll-a for specific lakes. Land use was an important indirect predictor of chlorophyll-a concentrations, whereas no consistent pattern was found for direct variables. However, specific conductance and temperature emerged as important direct predictors for different lakes. Our results highlight the importance of effective watershed management for protecting coastal wetlands.
- Ecosystem functioning
- Land use
- Machine learning
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Presenters/Authors
Joseph Gentine
(), University of Notre Dame , jgentin2@nd.edu;
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Whitney Conard
(), Department of Biological Sciences, University of Notre Dame, wconard@nd.edu;
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Matthew Cooper
(), Burke Center for Freshwater Innovation, Northland College, mcooper@northland.edu;
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Marina Hein
(), New Mexico Institute of Mining and Technology, marhein94@gmail.com;
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Ashley Moerke
(), Center for Freshwater Research and Education, Lake Superior State University, amoerke@lssu.edu;
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Katherine O'Reilly
(), Department of Biological Sciences, University of Notre Dame, koreill2@nd.edu;
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Gary Lamberti
(), University of Notre Dame, glambert@nd.edu;
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