B12A:
Nitrogen at the Interface: The N-Cycle across Physical and Disciplinary Boundaries II
Session ID#: 11478
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: Andrew R Babbin, Massachusetts Institute of Technology, EAPS, Cambridge, MA, United States
Co-Sponsor(s):
Abstracts Submitted to this Session:
Water Temperature, Not Dissolved Oxygen, Linked to Nitrite Accumulation in Estuaries (89764)
Sylvia Schaefer and James T Hollibaugh, University of Georgia, Department of Marine Sciences, Athens, GA, United States
Seasonal Distribution and Activity of Ammonia-oxidizing Archaea in the South Atlantic Bight (88939)
Qian Liu1, Bradley B Tolar2, Meredith J Ross3, Jelani B. Cheek3, Corinne M. Sweeney3, Natalie Wallsgrove4, Brian N Popp5 and James T Hollibaugh3, (1)University of Georgia, Marine Sciences, Athens, GA, United States, (2)Stanford University, Earth System Science, Stanford, CA, United States, (3)University of Georgia, Department of Marine Sciences, Athens, GA, United States, (4)University of Hawai'i, Department of Geology and Geophysics, Honolulu, HI, United States, (5)University of Hawaii, Geology & Geophysics, Honolulu, HI, United States
The community and function shift of ammonia oxidizers across terrestrial and marine (soil/sediment) boundaries in two coastal bay ecosystems (89374)
Cindy Jane Smith, National University of Ireland Galway, Microbiology, Galway, Ireland, Limei Zhang, Research Center for Eco-environmental Sciences, Chinese Academy of Sciences, Beijing, China and Aoife Duff, National University of Ireland Galway, Microbiology, Galway
Life at the Boundaries: a Multi-Approach Study Discloses Archaeal Diversity in the Black Sea. (87814)
Martina Sollai1, Laura Villanueva2, Ellen Hopmans3 and Jaap S. Sinninghe Damsté1,4, (1)Royal Netherlands Institute for Sea Research, 't Horntje, Netherlands, (2)NIOZ Royal Netherlands Institute for Sea Research, Department of Marine Microbiology and Biogeochemistry, 't Horntje, Netherlands, (3)Royal Netherlands Institute for Sea Research, Department of Marine Microbiology and Biogeochemistry, Texel, Netherlands, (4)Utrecht University, Department of Earth Sciences, Utrecht, Netherlands
Response of ammonia oxidizing archaea to environmental change and implications for the TEX86 proxy (93233)
Anitra E. Ingalls1, Wei Qin2, Laura Carlson2, Anthony Bertagnolli1, Virginia Armbrust2, Allan Devol2, James Moffett3 and David Stahl1, (1)University of Washington, Seattle, WA, United States, (2)University of Washington, School of Oceanography, Seattle, WA, United States, (3)University of Southern California, Department of Biological Sciences, Los Angeles, CA, United States
Ammonia Oxidation Rate is a Fundamental Control on Thaumarchaeal Lipid Composition and the TEX
86 Proxy (89686)
Sarah Hurley1, Felix J Elling2, Martin Könneke2, Carolyn Buchwald3, Scott D Wankel3, Alyson E Santoro4, Julius S Lipp2, Kai-Uwe Hinrichs2 and Ann Pearson5, (1)Harvard University, Cambridge, MA, United States, (2)MARUM - University of Bremen, Bremen, Germany, (3)Woods Hole Oceanographic Institution, Marine Chemistry & Geochemistry, Woods Hole, MA, United States, (4)University of Maryland Center for Environmental Science, Horn Point Laboratory, Cambridge, MD, United States, (5)Harvard University, Department of Earth and Planetary Sciences, Cambridge, MA, United States
15N tracer incubations and natural abundance isotopes reveal nitrification and denitrification production of nitrous oxide in the oxygen minimum zone (89161)
Qixing Ji, Princeton University, Geosciences, Princeton, NJ, United States and Bess B Ward, Princeton University, Department of Geosciences, Princeton, NJ, United States
