OB017
Marine Nitrogen Cycling Across Scales and Environments
Session ID#: 253996
Session Description:
The marine nitrogen (N) cycle is central to ocean productivity, ecosystem health, and climate regulation. This session will explore N cycling across diverse oceanographic environments, from oxygen deficient zones (ODZs) and oligotrophic gyres to estuarine and coastal systems. Despite their differences, these environments are all sites of dynamic N transformations that influence local ecosystem functioning and drive global nutrient fluxes.
We invite contributions spanning biogeochemical and microbial dimensions of N cycling, including molecular mechanisms, microbial community dynamics, isotopic tracer studies, and numerical modeling. In expanding (ODZs), anaerobic microbial processes lead to loss of bioavailable N and greenhouse gas production (e.g., N2O), impacting ocean productivity and climate feedbacks. In contrast, oligotrophic regions rely on N fixation to sustain productivity under nutrient limitation. Estuaries and coastal zones, shaped by strong gradients and anthropogenic inputs, exhibit intensified and variable N cycling mediated by diverse microbial communities.
We particularly encourage integrative studies linking microbial-scale processes to macroscale patterns, highlighting innovative techniques (e.g., omics, stable-isotope probing), and addressing the impacts of climate change and human activities. By fostering dialogue among oceanographers, microbiologists, and modelers, we aim to advance a unified understanding of N cycling and its role in sustaining ecosystem health in a changing ocean.
Co-Sponsor(s):
Index Terms:
0404 Anoxic and hypoxic environments [BIOGEOSCIENCES]
0414 Biogeochemical cycles, processes, and modeling [BIOGEOSCIENCES]
0454 Isotopic composition and chemistry [BIOGEOSCIENCES]
0469 Nitrogen cycling [BIOGEOSCIENCES]
Student/Early Career Chair: Emily Gipson, Skidaway Institute of Oceanography, University of Georgia, Savannah, United States
Primary Chair: Annie Bourbonnais, University of South Carolina Columbia, Columbia, United States
Co-chairs: Claudia Frey, University of Basel, Basel, Switzerland, Dr. Xingchen Tony Wang, PhD, Boston College, Department of Earth and Environmental Sciences, Chestnut Hill, United States and Moritz F Lehmann, University of Basel, Department of Environmental Sciences, Basel, Switzerland
BGC-Argo floats capture microbial transformations and oxygen dynamics in a rapidly evolving oxygen-deficient zone (1877409)
Mariana Bernardi Bif1, Colette LaMonica Kelly2, Mark A Altabet3, Annie Bourbonnais4, Claire E. Elbon5, Edgart Flores6,7, Kenneth S Johnson8, Alanna Mnich3 and Josh N Plant8, (1)University of Miami - Rosenstiel School (RSMAES), Miami, United States, (2)Stanford University, Stanford, United States, (3)University of Massachusetts Dartmouth, School for Marine Science and Technology, New Bedford, United States, (4)University of South Carolina, School of Earth, Ocean, and Environment, Columbia, United States, (5)Georgia Institute of Technology, Earth and Atmospheric Science, Atlanta, GA, United States, (6)Millennium Institute of Oceanography, Universidad de Concepción, Concepción, Chile, Oceanografía, Concepcion, Chile, (7)University of Colorado Boulder, Geological Sciences and INSTAAR, Boulder, United States, (8)Monterey Bay Aquarium Research Institute, Moss Landing, CA, United States
NITROUS OXIDE DYNAMICS IN THE EASTERN TROPICAL NORTH PACIFIC FROM STABLE ISOTOPIC DATA (1881266)
Annie Bourbonnais1, Darcy Perin2, Alanna Mnich3, Laura Bristow4, Mark A Altabet3 and Alanna Mnich, (1)University of South Carolina Columbia, Columbia, United States, (2)University of South Carolina, School of the Earth, Ocean and Environment, Columbia, United States, (3)University of Massachusetts Dartmouth, School for Marine Science and Technology, New Bedford, United States, (4)University of Gothenburg, Department of Marine Sciences, Gothenburg, Sweden
East-west variabilities in nitrogen sources sustaining pelagic food-webs in the oligotrophic subtropical waters in the North Pacific Ocean (2006381)
Sachiko Horii, Nagasaki Field Station, Japan Fisheries Research and Education Agency, Fisheries Resources Institute, Nagasaki, Japan, Hiroaki Saito, The University of Tokyo, Atmosphere and Ocean Research Institute, Kashiwa, Japan, Keitaro Fukushima, Fukushima University, Faculty of Food and Agricultural Sciences, Fukushima, Japan, Yuji Onishi, Research Institute for Humanity and Nature, Kyoto, Japan, Keisuke Koba, Center for Ecological Research, Kyoto University, Kyoto, Japan, Ken Furuya, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan and Kazutaka Takahashi, The University of Tokyo, Graduate School of Agricultural and Life Sciences, Tokyo, Japan
Seasonal and Spatial Dynamics of Upper Ocean Nitrogen Cycling from Marginal Seas to the Open Ocean: A Case Study in the East Asian Margins (2011950)
Carel Tan1,2, Haojia Abby Ren1,2, Yu-Chen Liu1, Ya-Hsien Lan2, Chia-Yi Pan3, Mei-Chen Lu4, Ya-Lan Chou4,5 and Tung-Yuan Ho4,5, (1)Department of Geosciences, National Taiwan University, Taipei, Taiwan, (2)Research Center for Critical Issues, Academia Sinica, Tainan, Taiwan, (3)Fisheries Research Institute, MOA, Taipei, Taiwan, (4)Research Center for Environmental Changes, Academia Sinica, Taipei, Taiwan, (5)IONTU Institute of Oceanography National Taiwan University, Taipei, Taiwan
Nitrogen fixation and Particle-Associated Diazotrophs in the Gulf of Finland (2012114)
Christian Furbo Reeder1, Lisa von Friesen, PhD1, Josephin Lemke2, Sarvesh Mundil2, Kristian Spilling2 and Hanna Farnelid1, (1)Linnaeus University, Department of Biology and Environmental Science, Kalmar, Sweden, (2)Finnish Environment Institute, SYKE, Helsinki, Finland
Benthic Cyanobacterial Mats Enhance Nitrogen Recycling in Eutrophic Lacustrine Sediments (2012800)
Archana Venkatachari1, Annie Bourbonnais1 and Kathryn L Cottingham2, (1)University of South Carolina, School of Earth, Ocean, and Environment, Columbia, United States, (2)Dartmouth College, Department of Biological Sciences, Hanover, United States
The Coastal Nitrogen Filter in Highly Dynamic Permeable Sediments of the Southern Baltic Sea (2015003)
Kaja Gentsch1, Soeren Ahmerkamp1, Peter Holtermann1, Ugo Marzocchi2, Torge Selle1, Oliver Thiele1 and Maren Voss1, (1)Leibniz Institute for Baltic Sea Research Warnemünde, Rostock, Germany, (2)Aarhus University, Department of Biology - Center for Electromicrobiology, Aarhus C, Denmark
Modularity of denitrification in the oxygen depleted waters of Golfo Dulce, Costa Rica (2015512)
Alisa Wuest1, Sina Schorn1, Benjamin Coltman2, Jennifer Crandall3, Eddy Gomez-Ramírez4, Katharina Kitzinger2, Morten Larsen5, Frank Stewart3 and Laura Bristow1, (1)University of Gothenburg, Department of Marine Sciences, Gothenburg, Sweden, (2)University of Vienna, Department of Microbial Ecology and Ecosystem Science, Vienna, Austria, (3)Montana State University, Department of Microbiology and Cell Biology, Bozeman, United States, (4)Universidad de Costa Rica, Centro de Investigación en Ciencias del Mar y Limnología, San José, Costa Rica, (5)University of Southern Denmark, Department of Biology, Odense, Denmark
The Influence of Nitrogen Fixation and Regeneration on the Modification of Atlantic Mode Waters: Insights from Stable Nitrogen Isotopes Along an Atlantic Meridional Transect. (2015571)
Adam Francis1,2, Robyn Tuerena1, Markus Ankele3, Kirstin Daehnke3, Tina Sanders3, Claire Mahaffey4 and Raja Ganeshram2, (1)Scottish Association for Marine Science, Oban, United Kingdom, (2)University of Edinburgh, Edinburgh, United Kingdom, (3)Helmholtz-Zentrum Hereon, Geesthacht, Germany, (4)University of Liverpool, Department of Earth, Ocean and Ecological Sciences, Liverpool, United Kingdom
Nitrosopumilus maritimus SCM1 produces nitrous oxide with a consistent site preference across changes in environmental conditions (2015810)
Meléa Emunah1, LEI Hou2, Xianhui Wan3, Hui Shen2, Wei Qin2, Bess B Ward4 and Karen L Casciotti1, (1)Stanford University, Oceans Department, Stanford, United States, (2)University of Illinois at Urbana-Champaign, Department of Microbiology, Urbana-Champaign, United States, (3)State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen, China, (4)Princeton University, Department of Geosciences, Princeton, United States
Niche Partitioning of Modular Denitrification Explains N2O Distributions and Cycling in Marine Oxygen Minimum Zones (2015846)
Daniel McCoy1, Dr. Xin Sun2, Pearse Buchanan3, Daniele Bianchi4 and Emily Zakem1, (1)Carnegie Institution for Science, Biosphere Sciences & Engineering, Pasadena, United States, (2)Princeton University, Department of Biology, Princeton, United States, (3)CSIRO Hobart, Environment, Hobart, TAS, Australia, (4)University of California Los Angeles, Department of Atmospheric and Oceanic Sciences, Los Angeles, United States
Global mean ocean nitrate δ18O as a tracer for the supply and recycling of fixed nitrogen in the ocean (2018597)
Simon Desmettre1, Cedric Dumoulin1, Violaine Coulon1, Dario Marconi2, Tanya Marshall2, Sofia Muller1, Yeongjun Ryu2, Tanja Wald3, Alfredo Martinez-Garcia4, Daniel Mikhail Sigman2 and Francois Fripat1, (1)Université Libre de Bruxelles, Brussel, Belgium, (2)Princeton University, Geosciences, Princeton, United States, (3)Max Planck Institute for Chemistry, Mainz, Germany, (4)Max Planck Institute for Chemistry, Climate Geochemistry, Mainz, Germany
Global marine metagenomics reveals the functional diversity and ecological adaptations of diazotrophs across marine ecosystems (2018921)
Lixia Deng1, Jiawei Chen1, Zhimeng Xu2, Sangwook Scott Lee1, Shunyan Cheung3 and Hongbin Liu1, (1)The Hong Kong University of Science and Technology, Hong Kong, Hong Kong, (2)Ocean University of China, Qingdao, China, (3)National Taiwan Ocean University, Keelung, Taiwan
The Role of Nitrogen Fixation in Supporting Export Production in the Ultraoligotrophic South Pacific Subtropical Gyre (2019798)
Timothy G Ferdelman1, Julia Duerschlag1, Dr. Wiebke Mohr1, Miriam Philippi1, Soeren Ahmerkamp2, Frank J Pavia3, Bernhard Fuchs1 and Marcel M.M. Kuypers4, (1)Max Planck Institute for Marine Microbiology, Bremen, Germany, (2)Leibniz Institute for Baltic Sea Research Warnemünde, Rostock, Germany, (3)University of Washington, School of Oceanography, Seattle, United States, (4)Max Planck Institute for Marine Microbiology, Department of Biogeochemistry, Bremen, Germany
From Production to Emission: Spatiotemporal Variability of Nitrous Oxide in the Northern Indian Ocean (2019928)
Yangyang Zhao, Princeton University, High Meadows Environmental Institute, Princeton, United States, Laure Resplandy, Princeton University, Princeton, NJ, United States, Xianhui Wan, State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen, China, Fan Yang, Princeton University, Department of Geosciences, Princeton, NJ, United States, Dr. Enhui Liao, PhD, Shanghai Jiao Tong University, School of Oceanography, Shanghai, China and Bess B Ward, Princeton University, Department of Geosciences, Princeton, United States
Unraveling phytoplankton contributions to nitrate-based new production: insights into the functional role of small eukaryotes in the North Pacific Subtropical Gyre. (2020055)
Catherine Crowley, PhD1, Brandon Brenes2, Angelicque E White3, Dr. Raquel Flynn4, Adrian Marchetti5, Josie L Mottram6, Sarah Fawcett7, Amanda H. DelVichio8, Julie Granger1 and Amanda H. DelVichio: University of Connecticut, Molecular and Cell Biology, (1)University of Connecticut, Marine Sciences, Groton, United States, (2)University of Hawaii at Manoa, Department of Oceanography, Honolulu, United States, (3)University of Hawai'i at Mānoa, Department of Oceanography, Honolulu, United States, (4)University of North Carolina at Chapel Hill, Earth, Marine, and Environmental Sciences, Chapel Hill, North Carolina, United States, (5)University of North Carolina at Chapel Hill, Department of Earth, Marine and Environmental Sciences, Chapel Hill, United States, (6)University of Connecticut, Department of Marine Sciences, Groton, United States, (7)University of Cape Town, Oceanography Department, Cape Town, South Africa, (8)University of Connecticut, Molecular and Cell Biology, Storrs, United States
Regional Oceanographic Controls on Pelagic Nitrogen Fixation in Northern Australian Waters (2020496)
Douglas G Capone, University of Southern California, Marine & Environmental Biology, Los Angeles, United States, Ajit Subramaniam, Columbia University, Lamont-Doherty Earth Observatory, Palisades, United States, Yubin Raut, Massachusetts Institute of Technology, Department of Earth, Atmospheric and Planetary Sciences, Cambridge, MA, United States, Joseph Peter Montoya, Georgia Inst Technology, Atlanta, United States, Miles Furnas, Australian Institue of Marine Sciences, Townsville, Australia, Margaret R Mullholland, Old Dominion University, Ocean and Earth Sciences, Norfolk, United States, Edward J Carpenter, SF State University, Estuary & Ocean Science Center, Tiburon, United States and Joseph Montoya
Nitrate and Total Organic Nitrogen Isotopic Signals of Nitrogen Transformations in the Surface Waters of the California Current Upwelling System (2020833)
Lingkun Guo1, Yeongjun Ryu1, Julie Granger2 and Daniel Mikhail Sigman1, (1)Princeton University, Geosciences, Princeton, United States, (2)University of Connecticut, Marine Sciences, Groton, United States
Recycling versus loss in the marine nitrogen cycle: an in situ perspective (2021100)
Laura Bristow1, Annie Bourbonnais2, Virginia P Edgcomb3, Claire Elise Elbon4, Katharina Kitzinger5, Maria Pachiadaki6, Sina Schorn1, Bo Thamdrup7, Alisa Wuest1, Emily Zakem8 and Morten Larsen7, (1)University of Gothenburg, Department of Marine Sciences, Gothenburg, Sweden, (2)University of South Carolina, School of Earth, Ocean, and Environment, Columbia, United States, (3)Woods Hole Oceanographic Institution, Geology and Geophysics Department, Woods Hole, United States, (4)Carnegie Institution for Science Stanford, Stanford, United States, (5)University of Vienna, Department of Microbial Ecology and Ecosystem Science, Vienna, Austria, (6)Woods Hole Oceanographic Institution, Biology, Woods Hole, United States, (7)University of Southern Denmark, Department of Biology, Odense, Denmark, (8)Carnegie Institution for Science Stanford, Biosphere Sciences & Engineering, Pasadena, United States
Isotopic characterization of N2O produced by an isolated marine bacteria carrying out dissimilatory nitrate reduction to ammonium (DNRA) (2021183)
Luke Calderaro1, Karen L Casciotti1, Mike C Sadler2, Robert M Morris2, Olivia Mason3 and Annie Bourbonnais4, (1)Stanford University, Oceans Department, Stanford, United States, (2)University of Washington, School of Oceanography, Seattle, United States, (3)Florida State University, Earth, Ocean, and Atmospheric Department, Tallahassee, United States, (4)University of South Carolina, School of Earth, Ocean, and Environment, Columbia, United States
DON Transformations in the Chukchi Sea and Bering Strait: A Stable Isotopic Approach (2021696)
William Ostergaard1,2, Annie Bourbonnais3, Archana Venkatachari3 and Calvin W. Mordy4, (1)UNITED STATES, (2)University of Miami, Rosenstiel School of Marine, Atmospheric, and Earth Science, Coral Gables, United States, (3)University of South Carolina, School of Earth, Ocean, and Environment, Columbia, United States, (4)Joint Institute for the Study of the Atmosphere and Ocean, Seattle, United States
Story of the Slough: Investigating the sedimentary nitrogen cycling and nitrous oxide production rates of three marshes in Elkhorn Slough, CA. (2022183)
Darcy Perin1, Annie Bourbonnais2, Archana Venkatachari2, Erik M. Smith3 and Adina Paytan4, (1)University of South Carolina, School of the Earth, Ocean and Environment, Columbia, United States, (2)University of South Carolina, School of Earth, Ocean, and Environment, Columbia, United States, (3)University of South Carolina, Georgetown, SC, United States, (4)University of California Santa Cruz, Institute of Marine Sciences, Earth & Planetary Sciences, Santa Cruz, United States
Shifts in Coastal Nitrogen Cycling During Pyropia Aquaculture on the central west coast of South Korea (2022500)
Hyoryeon Kim1, Seo-Young Kim1, Ju-Hyoung Kim2, Mi-Jeong Han3 and Il-Nam Kim1, (1)Incheon National University, Incheon, South Korea, (2)Kunsan National University, Gunsan, South Korea, (3)Chungcheongnamdo Institute of Fisheries Resources, Boryung, South Korea
Marine Nitrogen Cycle in the Anthropocene: Trends and Variability Driven by Climate Forcing and Nitrogen Inputs (2022940)
Jin-Ming Tang1,2 and Nicolas Gruber1, (1)Environmental Physics, Institute of Biogeochemistry and Pollutant Dynamics, ETH Zurich, Zurich, Switzerland, (2)State Key Laboratory of Marine Environmental Science, College of Ocean and Earth Sciences, Xiamen University, Xiamen, China
Hydro-Biological Modulation of Nitrate and its Dual Isotopes in the Kuroshio Extension Region (2023508)
Xiuli Yan, Shantou University, Shantou, CHINA, Jinyu Terence Yang, Xiamen University, State Key Laboratory of Marine Environmental Science, College of Ocean and Earth Sciences, Xiamen, China, Min Nina Xu, Hainan University, Hainan, China, Yanhua Wu, State Ocean Administration, Shenzhen, China, Huiwang Gao, Ocean University of China, Key Laboratory of Marine Environment and Ecology, Qingdao, China and Shuh-Ji Kao, State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou, China
Global pattern of nitrogen metabolism in marine prokaryotes using metagenomics (2024222)
Alexandre Schickele1, Hadrien Savioz1, Nicolas Gruber1, Lionel Guidi2, Jean-Olivier Irisson2 and Meike Vogt1, (1)Environmental Physics, Institute of Biogeochemistry and Pollutant Dynamics, ETH Zurich, Zurich, Switzerland, (2)Sorbonne Université, CNRS, Laboratoire d'Océanographie de Villefranche, UMR 7093 LOV, Villefranche-sur-Mer, France
Analysis of dissolved nitrate stable isotopes using the one-step Ti (III) reduction method and Elementar EnvirovisION System (2025658)
Kyle William Robert Taylor1, Calum Preece2, Sam Barker2, Rob Berstan2 and Mike Seed2, (1)Elementar Americas, Inc., Mount Laurel, NJ, United States, (2)Elementar UK Ltd, Stockport, United Kingdom
Efficient removal of anthropogenic nitrogen in coastal sediments downstream of the Mississippi-Atchafalaya River Basin (2026798)
Heather Donnelly1, Yanda Ou2, Jian-Jhih Chen3,4, Lauren T Toth5, Natalie Prinz3, Jennifer A. Flannery6, Julie N Richey6, Yuwei Wang3, Jessica Lueders-Dumont1, Xinping Hu7, Z. George Xue8 and Dr. Xingchen Tony Wang, PhD3, (1)Boston College, Department of Earth and Environmental Sciences, Chestnut Hill, MA, United States, (2)Louisiana State University, Oceanography and Coastal Sciences, Baton Rouge, United States, (3)Boston College, Department of Earth and Environmental Sciences, Chestnut Hill, United States, (4)National Kaohsiung University of Science and Technology (NKUST), Department of Marine Environmental Engineering, Kaohsiung, Taiwan, (5)USGS Coastal and Marine Science Center St. Petersburg, St Petersburg, United States, (6)USGS Coastal and Marine Science Center St. Petersburg, St Petersburg, FL, United States, (7)University of Texas at Austin, Marine Science Institute, Austin, United States, (8)Louisiana State University, Department of Oceanography and Coastal Sciences, Baton Rouge, LA, United States
What does the sediment microbiome tell us about nutrient and gas fluxes? (2027538)
Subhadeep Chowdhury, Boston University, Earth and Environment, Boston, United States, Alia Al-Haj, Smithsonian Environmental Research Center, Edgewater, United States, John Angell, University of South Florida, Integrative Biology, Florida, United States, Daniel Segre, Boston University, Bioinformatics Program, Faculty of Computing and Data Science, Boston, United States and Robinson W Fulweiler, Boston University, Earth and Environment, Biology, Boston, MA, United States
Global Estimates of Marine Nitrogen Fixation with Ensemble Machine Learning (2027972)
Hyee Shynn Lim1, Nicola A Wiseman1, Julie Robidart2, Christopher L Follett3, Patricia Sanchez-Baracaldo1 and Fanny M Monteiro1, (1)University of Bristol, School of Geographical Sciences, Bristol, United Kingdom, (2)National Oceanography Centre, Ocean Technology and Engineering, Southampton, United Kingdom, (3)University of Liverpool, Department of Earth, Ocean and Ecological Sciences, Liverpool, United Kingdom
Spring Mixed-layer Dynamics Modulate the Nitrate Assimilation Isotope Effect in the Indian Sector of the Southern Ocean (2028047)
Christina Monteiro1, Sarah Fawcett2, Heather Forrer3, Hazel Little-Leighton2, Brett Kuyper2 and Thomas James Ryan-Keogh4, (1)University of Cape Town, Oceanography, Muizenberg, South Africa, (2)University of Cape Town, Oceanography Department, Cape Town, South Africa, (3)Florida State University, Earth, Ocean & Atmospheric Science, Tallahassee, United States, (4)Council for Scientific and Industrial Research (CSIR), Southern Ocean Carbon-Climate Observatory (SOCCO), Cape Town, South Africa
Intracellular nitrate cycling in coastal marine sediments (2029733)
Jeremy Joel Rich, University of Maine, School of Marine Sciences, Orono, ME, United States, Sean O'Neill, University of Maine, School of Marine Sciences, Darling Marine Center, Walpole, United States, Christopher K Algar, Dalhousie University, Department of Oceanography, Halifax, NS, Canada and Anne E Giblin, Marine Biological Laboratory, Ecosystems Center, Woods Hole, United States
Evolutionary Dynamics of Nitrogen Fixation in Marine Thalassolituus (2029929)
Soma Sardar Barawi, Dalhousie University, Faculty of Computer Science and Department of Biology, Halifax, NS, Canada, Julie LaRoche, Dalhousie University, Department of Biology, Halifax, NS, Canada and Robert Beiko, Dalhousie University, Faculty of Computer Science, Halifax, NS, Canada
Defining the nitrogen isotopic signature of equatorial Pacific El Niño Southern Oscillation events over the last 150 years (2030405)
Anna Golub1, Alan Foreman2, Nicolas Duprey2, Alfredo Martinez-Garcia2, Christopher D Charles1 and Gerald Haugh2, (1)Scripps Institution of Oceanography, La Jolla, United States, (2)Max Planck Institute for Chemistry, Climate Geochemistry, Mainz, Germany
Systematic measurement technique for dissolved organic nitrogen stable isotopic composition using the solid phase extraction cartridge method (2032171)
Dr. Seung-Hee Kim, PhD, Pukyong National University, Institute of Sustainable Earth and Environmental Dynamics (SEED), Busan, South Korea, Dowon Kim, Pukyong National University, Division of Earth and Environmental System Sciences, Busan, South Korea, Jun-Oh Min, Korea Polar Research Institute, Division of Ocean and Atmosphere Sciences, Incheon, South Korea and Dong-Hun Lee, Division of Earth and Environment al System Sciences, PukyungNational University, Busan, South Korea
Impact of dissimilatory nitrate reduction to ammonium in the nitrogen cycle on oxygen variability in the south-central Chile (2033825)
Malaeka Robo, Sorbonne University, Observatoire Océanologique de Banyuls sur mer, Banyuls-sur-Mer, France, Sophie Rabouille, CNRS, Observatoire océanologique de Banyuls sur mer, Banyuls sur Mer, France, Diego Narvaez, Universidad de Concepción, Copas Coastal y Departamento de Oceanografía, Concepción, Chile, Boris Dewitte, Center for Ecology and Sustainable Management of Oceanic Islands (ESMOI), Facultad de Ciencias del Mar, Departamento de Biología Marina, Universidad Católica del Norte, Chile, Coquimbo, Chile, Veronique Garcon, IPGP/ CNRS, Paris, France, Oscar Pizarro, Instituto Milenio de Oceanografia (IMO), Universidad de Concepcion, Concepcion, Chile, Laura Farias, University of Concepcion; Center for Climate and Resilience Research (CR)2; Instituto Milenio en Socio-Ecología Costera (SECOS), Department of Oceanography, Concepcion, Chile, Alexander Galán, Centro de Investigación de Estudios Avanzados del Maule (CIEAM), Vicerrectoría de Investigación y Postgrado, Universidad Católica del Maule, Talca, Chile, Talca, Chile and Aurélien Paulmier, LEGOS/IRD, UMR5566, Toulouse, France
Unconditional nutrient niches for open ocean phytoplankton taxa (2033860)
Sarah Fawcett1, Bess B Ward2, Kolisa Yola Sinyanya3, Dr. Raquel Flynn4, Tanya Marshall5, Heather Forrer6, Yeongjun Ryu5, Julie Granger7 and Daniel Mikhail Sigman5, (1)University of Cape Town, Oceanography Department, Cape Town, South Africa, (2)Princeton University, Department of Geosciences, Princeton, United States, (3)Ulwazi Scientific Communications and STEM Research, Cape Town, South Africa, (4)University of North Carolina at Chapel Hill, Earth, Marine, and Environmental Sciences, Chapel Hill, North Carolina, United States, (5)Princeton University, Geosciences, Princeton, United States, (6)Florida State University, Earth, Ocean & Atmospheric Science, Tallahassee, United States, (7)University of Connecticut, Marine Sciences, Groton, United States
Living in Gradients: How Oxygen Shapes Microbial Community Structure in the Oxygen Minimum Zone of the Eastern South Pacific Ocean (2037117)
Claudia Maturana-Martinez, Centro de Estudios Avanzados en Zonas Aridas (CEAZA), Universidad La Serena, La Serena, Chile, Alexander Galán, Centro de Investigación de Estudios Avanzados del Maule (CIEAM), Vicerrectoría de Investigación y Postgrado, Universidad Católica del Maule, Talca, Chile, Talca, Chile, Omar Arzola Readi, Laboratorio de Fisiologia y Genetica Marina (FIGEMA), Departamento de Acuicultura, Facultad de Ciencias del Mar, Universidad Catolica del Norte, Coquimbo, Chile, Coquimbo, Chile and Boris Dewitte, Center for Ecology and Sustainable Management of Oceanic Islands (ESMOI), Facultad de Ciencias del Mar, Departamento de Biología Marina, Universidad Católica del Norte, Chile, Coquimbo, Chile
The Impacts of Kuroshio-Derived Mesoscale Eddies on Nitrogen Biogeochemistry in the Northern South China Sea (2037390)
Wenhui CUI, University of Macau, Department of Ocean Science and Technology, Faculty of Science and Technology, Macau, China, Zhiqin Jiang, South China Sea Institute of Oceanology, Chinese Academy of Sciences, State Key Laboratory of Tropical Oceanography, Guangzhou, China and Jie Xu, University of Macau, Ocean Science and Technology and Centre for Regional Oceans, Macau, China
Gradients in dissolved organic nitrogen isotopes in an idealized numerical model of the North Atlantic (2037786)
Tanya Marshall1, Mathieu Poupon2, Yeongjun Ryu1, Charles A Stock3, Jessica Y Luo3, Laure Resplandy4 and Daniel Mikhail Sigman1, (1)Princeton University, Geosciences, Princeton, United States, (2)Princeton University, Princeton, UNITED STATES, (3)NOAA Geophysical Fluid Dynamics Laboratory, Princeton, United States, (4)Princeton University, Princeton, NJ, United States
Advancing N2O Isotopic Measurements Using Picarro’s New PI5131-i Isotopic N2O Analyzer and Sage Gas Autosampler (2038099)
Magdalena Hofmann1, Jan Woźniak1, Erik Heeren2, Peter Swinkels1, Joyeeta Bhattacharya3, Tina Hemenway4 and Jingang Zhou4, (1)Picarro, B.V., Eindhoven, Netherlands, (2)Picarro B.V., Eindhoven, Netherlands, (3)Picarro Inc., Santa Clara, United States, (4)Picarro, Inc., Santa Clara, United States
Insights into deep Baltic Sea physical and biogeochemical cycling of nitrogen and oxygen indicated by dissolved gas tracers (2039586)
Katelyn McPaul1,2, Scott D Wankel1, Alan M Seltzer1,3, Colleen Hansel1, Volker Mohrholz4, Heide Schulz-Vogt4 and Christian Burmeister4, (1)Woods Hole Oceanographic Institution, Marine Chemistry & Geochemistry, Woods Hole, United States, (2)MIT-WHOI Joint Program in Oceanography/Applied Ocean Sciences and Engineering, Chemical Oceanography, Woods Hole, United States, (3)University College Dublin, Dublin, Ireland, (4)Leibniz-Institute for Baltic Sea Research, Rostock, Germany
Nitrogen dynamics of “miniature oceans”: Depth-discrete metagenomics in Palau’s marine lakes reveals links between biogeochemical processes and microbial community assemblage in a natural model system. (2039891)
Jemma Fadum, Carnegie Institution for Science, Biosphere Sciences & Engineering, Stanford, United States, Frank Gutierrez, University of California Merced, Merced, United States, Emily Zakem, Carnegie Institution for Science Stanford, Biosphere Sciences & Engineering, Pasadena, United States and Michael Beman, University of California Merced, Life and Environmental Sciences, Merced, United States
Diazotroph Community Seasonality Revealed in a 9-Year Monthly Time Series in the Temperate Coastal North Atlantic Ocean (2040142)
Emma Steedman1, Christian Petitpas2, Katyanne Shoemaker3, Jefferson Turner1, Abhishek Naik4, Ryan Nuttall1 and Dr. Pia Moisander5, (1)University of Massachusetts Dartmouth, New Bedford, United States, (2)Massachusetts Division of Marine Fisheries, New Bedford, United States, (3)NOAA Southwest Fisheries Science Center, Ecosystems and Aquaculture Aquaculture Innovation, Mildorf, United States, (4)University of Connecticut, Groton, United States, (5)University of Massachusetts Dartmouth, North Dartmouth, United States
Isotopic Effects of Nitrate Assimilation on the Amundsen Sea Shelf (2040923)
Kameko Landry1, Yeongjun Ryu2, Lingkun Guo2, Dario Marconi2, Tanya Marshall2, Linhan Shen2, Daniel Mikhail Sigman2 and Tony Xingchen Wang1, (1)Boston College, Department of Earth and Environmental Sciences, Chestnut Hill, United States, (2)Princeton University, Geosciences, Princeton, United States
Methodological Advances in Ammonium Detection: Clean Techniques Applied to Oligotrophic Ocean and Coastal Systems. (2041788)
Olivia Dilks-Smith1,2, Rodney Johnson1, Rachel Jane Parsons1, Nicholas Robert Bates1,3, Jessica Godfrey1, Roderick Bakker1 and Rebecca May1, (1)Arizona State University (ASU)-Bermuda Institute of Ocean Sciences (BIOS), St.George's, Bermuda, (2)University of Southampton, Southampton, United Kingdom, (3)Arizona State University, School of Ocean Futures, Tempe, United States
Diverse Nitrogen-Fixing Rhizobia-Diatom Symbioses are Cosmopolitan in the World’s Oceans (2041992)
Dr. Wiebke Mohr1, Mertcan Esti1, Miriam Philippi1, Julia Duerschlag1, Timothy G Ferdelman1, Jennifer Tolman2, Julie LaRoche2, Clara Martínez-Pérez1, Gaute Lavik3, Bernhard Tschitschko1, Hon Lun Wong3, Alexandra Kraberg4, Sten Littmann3, Abiel T Kidane1 and Marcel M M Kuypers1, (1)Max Planck Institute for Marine Microbiology, Bremen, Germany, (2)Dalhousie University, Department of Biology, Halifax, NS, Canada, (3)Max Planck Institute for Marine Microbiology, Department of Biogeochemistry, Bremen, Germany, (4)Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Polar Biological Oceanography, Bremerhaven, Germany
Diazotroph communities along gradients of oxygen on the Eastern Tropical/Subtropical North Pacific (2043557)
Dr. Pia Moisander, University of Massachusetts Dartmouth, North Dartmouth, United States, Mark A Altabet, University of Massachusetts Dartmouth, School for Marine Science and Technology, New Bedford, United States, Subham Chakraborty, University of Massachusetts Dartmouth, Biology, North Dartmouth, United States and Annie Bourbonnais, University of South Carolina, School of Earth, Ocean, and Environment, Columbia, United States
Benthic Foraminiferal Contributions to Nitrogen Cycling in Coastal Marine Sediments (2043695)
Caitlin Haley, University of Maine, School of Marine Sciences, Darling Marine Center, South Bristol, United States, Sean O'Neill, University of Maine, School of Marine Sciences, Darling Marine Center, Walpole, United States, Nicolaas Glock, University of Hamburg, Hamburg, Germany, Christopher K Algar, Dalhousie University, Department of Oceanography, Halifax, NS, Canada, Anne E Giblin, Marine Biological Laboratory, Ecosystems Center, Woods Hole, United States and Jeremy Joel Rich, University of Maine, School of Marine Sciences, Orono, ME, United States
Nitrogen Cycling in Permeable Marine Sediments of a Coastal Lagoon Influenced by Submarine Groundwater Discharge (2044275)
Jaye Ellen Cable, University of North Carolina at Chapel Hill, Earth, Marine, and Environmental Sciences, Chapel Hill, NC, United States, Jennifer Cherrier, CUNY Brooklyn College, Earth and Environmental Sciences, New York, NY, United States and Jonathan B. Martin, University of Florida, Geological Sciences, Gainesville, United States
SARGASSUM IN THE WESTERN TROPICAL ATLANTIC: BUGS, PLUMES, AND BLOOMS (2044284)
Joseph Peter Montoya, Georgia Institute of Technology Main Campus, Atlanta, GA, United States, Erica Kelley Strope, Georgia Institute of Technology, School of Biological Sciences, Atlanta, GA, United States, Kali Kater, Georgia Institute of Technology Main Campus, Ocean Science and Engineering, Atlanta, United States, Eli Z Harrison, Georgia Institute of Technology Main Campus, Biological Sciences, Atlanta, United States, Annalisa Bracco, Georgia Institute of Technology, School of Earth & Atmospheric Sciences, Atlanta, United States and Ajit Subramaniam, Columbia University, New York, United States
Salinity Surge Triggers Seasonal Peaks in Nitrogen Accumulation in a Dam Controlled Estuarine Lake (2044475)
Stefano Biondi, University of Florida, Ft Walton Beach, FL, United States, Daniele Pinton, University of Florida, Department of Civil and Coastal Engineering, Gainesville, FL, United States, Alberto Canestrelli, Pennsylvania State University Main Campus, University Park, United States and Chia Chu Chu, University of Florida, Department of Civil and Coastal Engineering, Ft Walton Beach, United States
Nitrous oxide cycling in the northern Gulf of Mexico from concentration and stable isotopic data (2047011)
William Love, University of South Carolina, School of the Earth Ocean and Environment, Columbia, United States, Melissa Shugart, University of South Carolina, School of the earth, ocean, and environment, Columbia, United States and Annie Bourbonnais, University of South Carolina, School of Earth, Ocean, and Environment, Columbia, United States
Single-Cell Chemoautotrophy and Biosynthesis Rates in Ammonia Oxidizing Archaea and Anammox Bacteria within the ETNP’s Oxygen Deficient Zone (2047358)
Natalie Butkevich1, Chase Gray2, Elena Yakubovskaya1, Tatiana Zaliznyak1, Leslie Mejia1, Virginia P Edgcomb3, Maria Pachiadaki4 and Gordon T Taylor5, (1)Stony Brook University, School of Marine and Atmospheric Sciences, Stony Brook, United States, (2)Woods Hole Oceanographic Institution, Falmouth, United States, (3)Woods Hole Oceanographic Institution, Geology and Geophysics Department, Woods Hole, United States, (4)Woods Hole Oceanographic Institution, Biology, Woods Hole, United States, (5)Stony Brook University, School of Marine and Atmospheric Sciences, Stony Brook, NY, United States
