B14A:
Nitrogen at the Interface: The N-Cycle across Physical and Disciplinary Boundaries IV Posters


Session ID#: 9274

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 Chairs:  Bradley B Tolar, Stanford University, Earth System Science, Stanford, CA, United States
Chairs:  Andrew R Babbin, Massachusetts Institute of Technology, Civil and Environmental Engineering, 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, Civil and Environmental Engineering, Cambridge, MA, United States(3)Woods Hole Oceanographic Institution, Marine Chemistry & Geochemistry, Woods Hole, MA, United States
Student Paper Review Liaisons:  Julian Damashek, Stanford University, Earth System Science, Stanford, CA, United States
Index Terms:

4273 Physical and biogeochemical interactions [OCEANOGRAPHY: GENERAL]
4805 Biogeochemical cycles, processes, and modeling [OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL]
4840 Microbiology and microbial ecology [OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL]
4845 Nutrients and nutrient cycling [OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL]
Co-Sponsor(s):
  • EC - Estuarine and Coastal
  • ME - Marine Ecosystems
  • MM - Microbiology and Molecular Biology
  • PO - Physical Oceanography/Ocean Circulation

Abstracts Submitted to this Session:

 
Nitrite isotopes as tracers for marine N cycle processes (Invited) (90736)
Karen L Casciotti1, Carolyn Buchwald2, Brian D Peters1, Matthew Sean Forbes1 and Taylor Sparks Martin1, (1)Stanford University, Earth System Science, Stanford, CA, United States, (2)Woods Hole Oceanographic Institution, Marine Chemistry & Geochemistry, Woods Hole, MA, United States
 
Investigating N cycle processes in the Arabian Sea oxygen deficient zone using paired N and O isotope measurements of nitrate and nitrite (90527)
Taylor Sparks Martin and Karen L Casciotti, Stanford University, Earth System Science, Stanford, CA, United States
 
Nitrous Oxide (N2O) cycling in the Equatorial Tropical South Pacific (ETSP) Oxygen Deficient Zone (ODZ) - evidence for production, consumption and N2O transport. (89170)
Matthew Sean Forbes1, Brian D Peters1, Karen L Casciotti2 and Jagruti Vedamati3, (1)Stanford Earth Sciences, Stanford, CA, United States, (2)Stanford University, Earth System Science, Stanford, CA, United States, (3)Stanford University, Stanford, CA, United States
 
Constraining the role of iron in environmental nitrogen transformations: Dual stable isotope systematics of abiotic NO2- reduction by Fe(II) and its production of N2O (91452)
Carolyn Buchwald, Woods Hole Oceanographic Institution, Marine Chemistry & Geochemistry, Woods Hole, MA, United States, Kalina Cozette Grabb, Harvard University, Earth and Planetary Sciences, Cambridge, MA, United States, Colleen M Hansel, Woods Hole Oceanographic Institution, Woods Hole, MA, United States and Scott D Wankel, Woods Hole Oceanographic Institution, Marine Chemistry and Geochemistry, Woods Hole, MA, United States
 
Under-recognized pathways of N2O production in coastal sediments: Increased fungal and chemo-denitrification in response to elevated N loading (91566)
Scott D Wankel, Woods Hole Oceanographic Institution, Marine Chemistry and Geochemistry, Woods Hole, MA, United States, Wiebke Ziebis, University of Southern California, Biological Sciences, Los Angeles, CA, United States, Carolyn Buchwald, Woods Hole Oceanographic Institution, Marine Chemistry & Geochemistry, Woods Hole, MA, United States, Chawalit Charoenpong, Massachusetts Institute of Technology, Earth, Atmospheric and Planetary Science, Cambridge, MA, United States and Dirk de Beer, Max Planck Institute for Marine Microbiology, Bremen, Germany
 
Biologically-associated Nitrous Oxide Accumulation in the Euphotic Zone (91571)
Wan Sean Xianhui, State Key Laboratory of Marine Environmental Science, Xiamen University, China, Xiamen, China
 
Seasonal Dynamics of Ammonia- and Nitrite-Oxidizing Organisms in the Sediment and Water Column of a Salt Marsh Estuary: Duplin River, Sapelo Island, Georgia, USA (Invited) (89964)
James T Hollibaugh, Qian Liu, Meredith J Ross, Jelani B. Cheek and Corinne M. Sweeney, University of Georgia, Department of Marine Sciences, Athens, GA, United States
 
Nitrogen Cycling in Seagrass Beds Dominated by Thalassia testudinum and Halodule wrightii: the Role of Nitrogen Fixation and Ammonium Oxidation in Regulating Ammonium Availability (92607)
Jane M Caffrey, Rachel Capps and Chelsea Hester, University of West Florida, Center for Environmental Diagnostics and Bioremediation, Pensacola, FL, United States
 
In situ nitrification rates and activity of present nitrifiers in the bottom water layer of two Baltic coastal zones affected by different riverine nutrient loads (90871)
Ines Bartl1, Elisabeth Münster Happel2, Lasse Riemann2 and Maren Voss1, (1)Leibniz Institute for Baltic Sea Research Warnemuende (IOW), Biological Oceanography, Rostock, Germany, (2)University of Copenhagen, Marine Biological Section, Helsingor, DE, Denmark
 
Nitrification from the Pacific Ocean to the Sacramento River: Do Distinct Microbial Communities Affect Biogeochemical Nitrogen Cycling in the Waters of a Large Urban Estuary? (90137)
Julian Damashek, Tynan Challenor, Karen L Casciotti and Christopher Francis, Stanford University, Earth System Science, Stanford, CA, United States
 
Nitrite Reductase (nirK) as an Alternative Molecular Marker for Ammonia-oxidizing Archaea: Quantification and Characterization of Thaumarchaeal nirK Genes in Estuarine Sediments from San Francisco Bay (91895)
Linta Reji1, Jessica Audrey Lee1,2, Julian Damashek1 and Christopher Francis1, (1)Stanford University, Earth System Science, Stanford, CA, United States, (2)University of Idaho, United States
 
Nitrogen and organic carbon cycling processes in tidal marshes and shallow estuarine habitats (93316)
Brian A Bergamaschi, Bryan D Downing, Brian A Pellerin, Tamara E C Kraus, Jacob Fleck and Roger Fujii, USGS California Water Science Center Sacramento, Sacramento, CA, United States
 
Controls on Water Column Nitrification Over the Chukchi Shelf, Arctic Ocean During the SUBICE Campaign (May - June, 2014) (90720)
Emilie Belle Dirck1, Matthew M Mills2, Karen L Casciotti2, Matthew Sean Forbes3, Pierre Coupel4 and Kevin R Arrigo5, (1)California State University, Monterey Bay, Seaside, CA, United States, (2)Stanford University, Earth System Science, Stanford, CA, United States, (3)Stanford Earth Sciences, Stanford, CA, United States, (4)Takuvik Joint International Laboratory, Département de Biologie and Québec-Océan, QC, (5)Stanford University, Stanford, CA, United States
 
Nitrifier Diversity and Distribution Controls in the Chukchi Sea Shelf sediments (87614)
Madison Brown Jackson1, Matthew M Mills2, Kevin R Arrigo3, Christopher Francis2 and Emily Cardarelli2, (1)Stanford University, School of Earth, Energy, & Environmental Sciences, Stanford, CA, United States, (2)Stanford University, Earth System Science, Stanford, CA, United States, (3)Stanford University, Stanford, CA, United States
 
Combining Molecular, Genomic, and Isotopic Techniques to Examine the Metabolism of Marine Thaumarchaeota in Monterey Bay and the California Current System (92285)
Bradley B Tolar1, Jason M Smith2 and Christopher Francis1, (1)Stanford University, Earth System Science, Stanford, CA, United States, (2)Monterey Bay Aquarium Research Institute, Biological Oceanography, Moss Landing, CA, United States
 
Anaerobic Nitrogen Cycling: Tales from the Eastern Tropical Pacific (93630)
Andrew R Babbin1, Carolyn Buchwald2 and Scott D Wankel2, (1)Massachusetts Institute of Technology, Civil and Environmental Engineering, Cambridge, MA, United States, (2)Woods Hole Oceanographic Institution, Marine Chemistry & Geochemistry, Woods Hole, MA, United States
 
Insight into the N-cycling in the North Sea (92213)
Alida Rosales1,2 and Timothy D Jickells1, (1)University of East Anglia, Environmental Sciences, Norwich, United Kingdom, (2)CICIMAR-IPN, Oceanology, La Paz, Mexico
 
Effects of Ammonium-rich Wastewater Effluent on Phytoplankton Productivity in Experimental Mesocosms from the northern San Francisco Estuary (93305)
Nicole Mayu Travis, Romberg Tiburon Center, Tiburon, CA, United States; Stanford University, Earth Systems, Palo Alto, CA, United States and Alexander E Parker, The California Maritime Academy, Vallejo, CA, United States
 
Observations of a summertime phytoplankton bloom in the northeastern subtropical Pacific (91921)
Gert van Dijken1, Daniel B Whitt2, Matthew M Mills1, Irina N Shilova3, Julie Robidart4, Karin M Bjorkman5, Matthew J Church5, Jonathan P Zehr6 and Kevin R Arrigo7, (1)Stanford University, Earth System Science, Stanford, CA, United States, (2)University of Cambridge, Cambridge, United Kingdom, (3)University of California Santa Cruz, Ocean Sciences, Santa Cruz, CA, United States, (4)National Oceanographic Centre, Southampton, United Kingdom, (5)University of Hawaii at Manoa, Honolulu, HI, United States, (6)University of California Santa Cruz, Santa Cruz, CA, United States, (7)Stanford University, Stanford, CA, United States
 
Spatial distribution of δ15N of chlorophyll-a in surface sediment of the northern Benguela Upwelling System (77798)
Yu Xin, Ocean University of China, Marine Chemistry, Qingdao, China
 
Rapid Return of Nitrogen but not Phosphorus to Ecosystem Nutrition During Decomposition of Quagga Mussel Tissue in Sand, Mud, or Water During Oxic or Anoxic Incubation: Implications for Phytoplankton Bioenergetics. (91450)
Ellen Marie Cooney, Russell Lee Cuhel and Carmen Aguilar, University of Wisconsin Milwaukee, Milwaukee, WI, United States
 
An Analysis of Denitrification and Anammox Processes in Sediments Underneath Oyster Aquaculture (90259)
Claudia Isabela Mazur1,2, Virginia P Edgcomb2, Daniel Rogers2,3 and Alec Cobban2,4, (1)Mount Holyoke College, Department of Geology and Geography, South Hadley, MA, United States, (2)Woods Hole Oceanographic Institution, Geology & Geophysics, Woods Hole, MA, United States, (3)Stonehill College, Chemistry, Easton, MA, United States, (4)Dartmouth College, Hanover, NH, United States
 
In Situ Measurements of Nitrogen Cycling Across an Aquaculture Chronosequence (88415)
Nicholas Ray, Boston University, Biology, Boston, MA, United States, Alia Al-Haj, Boston University and Robinson W Fulweiler, Boston University, Boston, MA, United States
 
The contribution of oyster microbiomes to denitrification and nitrous oxide emissions in estuarine and coastal ecosystems (91808)
Ann M Arfken1, Bongkeun Song2 and Ashley Smyth1, (1)Virginia Institue of Marine Science, Biological Sciences, Gloucester Pt., VA, United States, (2)UNCW, Wilmington, NC, United States
 
Nitrification Processes, Conversion Kinetics, Physical Substrate Preferences and Source Function Analysis for an Aquatic Nitrification Model System (93502)
Julia Zimmer, Brendan O'Connor, Katherine Halmo and Ame Xiong, University of Wisconsin Milwaukee, Milwaukee, WI, United States
 
Raffinate waste as a nitrogen replacement to increase the sustainable use of marine microalgae for biofuel production (92085)
Courtney Swink, University of South Carolina Undergraduate Student, Columbia, SC, United States and Brian Palenik, Scripps Institution of Oceanography