B31A:
Nutrient Cycling in Wetlands and Aquatic Ecosystems I
Submit an Abstract to this Session
Session ID#: 6866
Session Description:
Nitrogen (N) and phosphorous (P) are limiting nutrients, thus their availability drives ecosystem productivity and functioning. Due to the complexity of N and P cycling resulting from rapid transformations and recycling, little is known about the available forms of these two nutrients and their fate within ecosystems. While many freshwater aquatic ecosystems experience increased loading of both N and P due to anthropogenic inputs, some wetlands (i.e. northern peatlands) are thought to be N and P-limited. This session therefore welcomes contributions that focus on biogeochemical cycling of N and P in freshwater aquatic ecosystems (lakes, rivers, and streams) and wetlands (freshwater marshes, peatlands and swamps). We encourage contributions that focus on all aspects of N and P cycling, including stoichiometry, inputs, transformations, fate and exports but also effects of N and P on ecosystem functioning.
OSPA Liaison: Tatjana Živković, McGill University, Geography, Montreal, QC, Canada
Chairs: Julie Talbot, University of Montreal, Department of Geography, Montréal, QC, Canada and Roxane Maranger, Université de Montréal, Sciences biologiques, Montréal, QC, Canada
Primary Convener: Julie Talbot, University of Montreal, Department of Geography, Montréal, QC, Canada
Conveners: Tatjana Živković, McGill University, Geography, Montreal, QC, Canada and Roxane Maranger, Université de Montréal, Montreal, QC, Canada
Abstracts Submitted to this Session:
From Cradle to Grave: the Stoichiometry of Northern Peatlands (Invited) (33567)
Tim R Moore, McGill University, Department of Geography, Montreal, QC, Canada; McGill University, Department of Geography, and Global Environmental and Climate Change Centre, Montreal, QC, Canada and Meng Wang, Peking University, School of Earth and Space Sciences, Beijing, China
Estimation of foliar chlorophyll and nitrogen content in an ombrotrophic bog from hyperspectral data: scaling from leaf to image (33716)
Margaret Kalacska1, Mark Lalonde1 and Tim R Moore2, (1)McGill University, Geography, Montreal, QC, Canada, (2)McGill University, Department of Geography, Montreal, QC, Canada
Responses of Nutrient Dynamics to Warming and Water Table Lowering Simulations of Climate Change in a Northern Treed Bog (36774)
Tariq M Munir1,2, Bin Xu3, Bhupesh Khadka1 and Maria Strack1,4, (1)University of Calgary, Calgary, AB, Canada, (2)Saint Mary's University, Geology, Calgary, AB, Canada, (3)Northern Alberta Institute of Technology, Boreal Research Institute, Peace River, AB, Canada, (4)University of Waterloo, Geography and Environmental Management, Waterloo, ON, Canada
How Species Dominance and Water Table Depth Modulate the Responses of Bog Vegetation to Simulated Nitrogen Deposition? (34109)
Sari Juutinen1, Tuula Larmola1, Jill L Bubier2, Kayla Smith2 and Tim R Moore3, (1)University of Helsinki, Department of Forest Sciences, Helsinki, Finland, (2)Mount Holyoke College, Environmental Studies Department, South Hadley, MA, United States, (3)McGill University, Department of Geography, Montreal, QC, Canada
Sphagnum N and P Stoichiometry May Predict the Magnitude of N2 Fixation Rates in Ombrotrophic Bogs (34907)
Tatjana Živković, McGill University, Geography, Montreal, QC, Canada, Tim R Moore, McGill University, Department of Geography, Montreal, QC, Canada and Kristina Disney, McGill University, Montreal, QC, Canada
Are Ombrotrophic Bog Shrubs Stressed under High Nutrient Load? (34319)
Tuula Larmola1,2, Vi Bui2,3, Jill L Bubier2, Meng Wang4,5, Meaghan T. Murphy5 and Tim R Moore5, (1)University of Helsinki, Department of Forest Sciences, Helsinki, Finland, (2)Mount Holyoke College, Environmental Studies Department, South Hadley, MA, United States, (3)Western University, Department of Biology, London, ON, Canada, (4)Northwest A&F University, Laboratory for Ecological Forecasting and Global Change, College of Forestry, Yangling, China, (5)McGill University, Department of Geography, and Global Environmental and Climate Change Centre, Montreal, QC, Canada
