B53G:
Anthropogenic Impacts on Nutrient Cycling in Freshwater Ecosystems II

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Session ID#: 31760

Session Description:
Freshwater systems play an important role in global biogeochemical cycling as conduits and modulators of nutrients. Human perturbation of nutrient cycles has led to significant changes in freshwater ecosystems from the micro- to macro-scale. Pollution of waterways, damming of rivers, atmospheric deposition and anthropogenic climate change alter freshwater nutrient cycling, with implications for ecosystem functioning from the poles to the equator. This session will focus on how nutrient cycles are responding to anthropogenic perturbations, the mitigation thereof, and how we can employ modern technologies to understand linkages between nutrient cycles within and across systems. We encourage contributions focusing on nutrient cycling responses and feedbacks at any or across scales, including modelling, lab and field studies, particularly those that employ modern analytical techniques. This multidisciplinary session brings together scientists with interests spanning microbiology, biogeochemistry, glaciology, hydrology and limnology to debate the current state of knowledge, recent advances and to share ideas
Primary Convener:  Jon Hawkings, University of Bristol, School of Geographical Sciences, Bristol, BS8, United Kingdom
Conveners:  James W McClelland, University of Texas at Austin, Marine Science Institute, Austin, TX, United States and Anne Kellerman, Florida State University, Department of Earth, Ocean & Atmospheric Science, Tallahassee, United States
Chairs:  Jon Hawkings, University of Bristol, School of Geographical Sciences, Bristol, BS8, United Kingdom and Anne Kellerman, Florida State University, Department of Earth, Ocean & Atmospheric Science, Tallahassee, United States
OSPA Liaison:  Anne Kellerman, Florida State University, Department of Earth, Ocean & Atmospheric Science, Tallahassee, United States

Cross-Listed:
  • C - Cryosphere
  • GC - Global Environmental Change
  • H - Hydrology
Index Terms:

0470 Nutrients and nutrient cycling [BIOGEOSCIENCES]
0496 Water quality [BIOGEOSCIENCES]
1615 Biogeochemical cycles, processes, and modeling [GLOBAL CHANGE]
1806 Chemistry of fresh water [HYDROLOGY]

Abstracts Submitted to this Session:

Tradeoffs in Greenhouse Gas Fluxes from Aquatic Ecosystems Along a Rural to Urban Gradient are Driven by N Loading (270745)
William H McDowell, University of New Hampshire Main Campus, Natural Resources and the Environment, Durham, NH, United States and Jody Potter, University of New Hampshire, Durham, NH, United States
Factors Controlling Nitrogen Loadings in Major River Basins Across the United States (272429)
Elizabeth W Boyer1, Richard B Alexander2, James N Galloway3, Heather E Golden4, Richard B Moore5, Gregory E. Schwarz2, Jud W Harvey2, Jesus D. Gomez-Velez6, Durelle Scott7 and John W. Clune8, (1)Pennsylvania State University, University Park, United States, (2)U.S. Geological Survey, Reston, VA, United States, (3)University of Virginia, Environmental Sciences, Charlottesville, VA, United States, (4)US Environmental Protection Agency, Cincinnati, OH, United States, (5)U.S. Geological Survey, Pembroke, NH, United States, (6)Vanderbilt University, Civil and Environmental Engineering, Nashville, TN, United States, (7)Virginia Polytechnic Institute and State University, Biological Systems Engineering, Blacksburg, United States, (8)U.S. Geological Survey, Williamsport, PA, United States
Long-Term Trends in Nutrient Concentrations and Fluxes in Streams Draining to Lake Tahoe, California (235038)
Joseph L Domagalski, USGS California Water Science Center Sacramento, Sacramento, CA, United States
Catchment-fed cyanobacterial blooms in brownified temperate lakes (287050)
Oscar Senar, University of Western Ontario, London, ON, Canada and Irena F Creed, University of Saskatchewan, Saskatoon, SK, Canada
Recent declines in DIN:TP in Swedish lakes driven by changes in N deposition and climate (251054)
Peter D Isles1, Ann-Kristin Bergström2 and Anders Jonsson2, (1)Umeå University, Umeå, Sweden, (2)Umeå University, Department of Ecology and Environmental Science, Umeå, Sweden
Characterizing the Fate and Mobility of Phosphorus in Utah Lake Sediments (263643)
Gregory T Carling1, Matt Randall2, Stephen Nelson3, Kevin Rey3, Neil Hansen2, Barry Bickmore3 and Theron Miller4, (1)Brigham Young University, Department of Geological Sciences, Provo, UT, United States, (2)Brigham Young University, Provo, UT, United States, (3)Brigham Young University, Department of Geological Sciences, Provo, United States, (4)Wasatch Front Water Quality Council, Salt Lake City, UT, United States
Data-driven nutrient analysis and reality check: Human inputs, catchment delivery and management effects (295702)
Georgia Destouni, Stockholm University, Department of Physical Geography, Stockholm, Sweden

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