B13A:
Nitrogen at the Interface: The N-Cycle across Physical and Disciplinary Boundaries III
Session ID#: 11479
Session Description:
Nitrogen availability is an important control on ecosystem dynamics in marine realms, from oligotrophic gyres to eutrophic coastal waters. Assessing what controls the rates and distribution of N-cycling processes is therefore of paramount importance for linking nitrogen biogeochemistry to productivity and ecosystem function. Physical interfaces in the ocean are locations where the biology and chemistry of distinct water masses and sediments interact, and appear to be hotspots for N-cycling. This session highlights nitrogen biogeochemistry at aquatic interfaces, including oxic-anoxic transition zones, eddies/fronts, estuaries, and coastal/upwelling regions. Research on N-cycle processes from unique marine interfaces and gradients of any kind is welcomed.
Furthermore, recent advances in our understanding of N-cycling have come from increasingly diverse research fields, such as refined isotopic techniques, unique methods for modeling biogeochemical rates, and novel microbial analyses. In addition to research located at physical interfaces, this session seeks presentations at the “interface” of traditional oceanographic methods. Primary consideration will be given to presentations that incorporate techniques from multiple disciplines, including (but not limited to) isotope geochemistry, microbial ecology, physical oceanography, and marine ecosystem modeling. Therefore, this session will focus on integrating data and ideas across several oceanographic disciplines to holistically understand N-cycling processes at marine interfaces.
Primary Chair: Bradley B Tolar, Stanford University, Earth System Science, Stanford, CA, United States
Chairs: Andrew R Babbin, Massachusetts Institute of Technology, EAPS, Cambridge, MA, United States, Carolyn Buchwald, Woods Hole Oceanographic Institution, Marine Chemistry & Geochemistry, Woods Hole, MA, United States and Julian Damashek, Stanford University, Earth System Science, Stanford, CA, United States
Moderators: Bradley B Tolar1, Andrew R Babbin2, Carolyn Buchwald3 and Julian Damashek1, (1)Stanford University, Earth System Science, Stanford, CA, United States(2)Massachusetts Institute of Technology, EAPS, Cambridge, MA, United States(3)Woods Hole Oceanographic Institution, Marine Chemistry & Geochemistry, Woods Hole, MA, United States
Student Paper Review Liaison: Carolyn Buchwald, Woods Hole Oceanographic Institution, Marine Chemistry & Geochemistry, Woods Hole, MA, United States
Co-Sponsor(s):
Abstracts Submitted to this Session:
Anammox from head-water streams to ocean sediments - different strategies for different systems (92183)
Mark Trimmer1, Katrina Lansdown1, Catherine M Heppell2, Corinne B Whitby3, Boyd McKew3, Alex Dumbrell3 and Andrew M. Binley4, (1)Queen Mary University of London, School of Biological and Chemical Sciences, London, United Kingdom, (2)Queen Mary, University of London, London, United Kingdom, (3)University of Essex, Biology, Colchester, United Kingdom, (4)University of Lancaster, Lancaster, United Kingdom
High-Precision Measurements of
15N
15N,
14N
15N, and
14N
2 in N
2 and Potential Applications to Oceanic Nitrogen Cycle Research (92613)
Shuning Li1, Laurence Yeung1, Edward D Young2, Nathaniel E Ostrom3 and Joshua A Haslun3, (1)Rice University, Department of Earth Science, Houston, TX, United States, (2)University of California Los Angeles, Los Angeles, CA, United States, (3)Michigan State University, Integrative Biology, East Lansing, MI, United States
Hydrodynamic and Environmental Controls on the Nitrogen Isotope Effect of Benthic N
2 Production (92122)
Jurjen Rooze and Christof D Meile, University of Georgia, Marine Sciences, Athens, GA, United States
Reactive transport modeling of nitrogen in Seine River sediments (93074)
Zahra Akbarzadeh, University of Waterloo, Earth and Environmental Sciences, Waterloo, ON, Canada, Anniet Laverman, OSUR-ECOBIO-CNRS UMR 6553 - Université Rennes 1, Rennes, France, Melanie Raimonet, Sorbonne universités, UPMC Univ Paris 06, Paris, France, Fereidoun Rezanezhad, University of Waterloo, Ecohydrology Research Group, Waterloo, ON, Canada and Philippe Van Cappellen, Ecohydrology Research Group, Water Institute and Global Water Futures Program, University of Waterloo, Waterloo, ON, Canada
Microbial Ecological Niche Partitioning Affects N
2 gas Production in the Largest Marine Oxygen Minimum Zone (93171)
Clara A Fuchsman1, Justin Leonard Penn2, Allan Devol3, Hilary I Palevsky4, Curtis A Deutsch2, Richard Keil1, Bess B Ward5 and Gabrielle Rocap1, (1)University of Washington, School of Oceanography, Seattle, WA, United States, (2)University of Washington Seattle Campus, School of Oceanography, Seattle, WA, United States, (3)University of Washington, Seattle, WA, United States, (4)Woods Hole Oceanographic Institution, Woods Hole, MA, United States, (5)Princeton University, Department of Geosciences, Princeton, NJ, United States
Environmental and Microbial Features Affecting Denitrification and Anammox Hotspots in an Estuarine Ecosystem (92412)
Jessica Lisa1, Bongkeun Song1, Jonathan S Lefcheck1 and Craig R Tobias2, (1)Virginia Institute of Marine Science, Biological Sciences, Gloucester Point, VA, United States, (2)University of Connecticut, Department of Marine Sciences, Groton, CT, United States
Fertilization Results in a Dramatic Decrease in Diversity of Active Denitrifying Bacteria (89815)
Jennifer L Bowen, U Mass Boston, Boston, MA, United States and Patrick Kearns, University of Massachusetts Boston, Boston, MA, United States
