OB001
Approaches to study marine oxygen deficient zones from macro to micro scales
Session ID#: 85864
Session Description:
Eutrophication and climate change have been implicated in the emergence and expansion of hypoxic zones in marine systems. Corresponding shifts in microbial community towards anaerobic metabolisms have resulted indecreased nitrogen bioavailability and, as by-product, the release of potent greenhouse (N2O and CH4) or toxic (H2S) gases.Besides the more frequently investigated large scale hypoxic zones (100s of m to 100s of km), ephemeral and local (mm â meters) hypoxia has also been shown to severely impact the structure and productivity of aquatic ecosystems. Current advances in measuring low dissolved oxygen concentrations (e.g., switchable trace oxygen (STOX) amperometric microsensors, optical beads, gas tension devices) at high temporal and spatial resolutions provide an increasingly comprehensive overview on the occurrence of these phenomena. However, the extent and the ecological significance of small scale, local low oxygen zones remains unresolved. This session will bring different lines of research together to a) discuss advances in analytical technology, including stable and radioisotope geochemical (13C, 15N, 14C) and metagenomic and metatranscriptomic approaches b) identify overarching factors that dictate the emergence of low oxygen zones c) understand the effects of decreased oxygen availability on different habitats and communities, and d) propose mitigation strategies for the increasing impacts of hypoxia on benthic habitats. We aim to bring together ecologists and physiologists, physical oceanographers, fluid dynamic analysts, as well as all other scientists interested in aquatic oxygen dynamics at local scales to look into the complex interplay between microbes, nutrients and organic matter cycling in ODZs.
Index Terms:
4220 Coral reef systems [OCEANOGRAPHY: BIOLOGICAL]
4227 Diurnal, seasonal, and annual cycles [OCEANOGRAPHY: BIOLOGICAL]
4546 Nearshore processes [OCEANOGRAPHY: PHYSICAL]
4804 Benthic processes, benthos [OCEANOGRAPHY: BIOLOGICAL]
4805 Biogeochemical cycles, processes, and modeling [OCEANOGRAPHY: CHEMICAL]
4840 Microbiology and microbial ecology [OCEANOGRAPHY: BIOLOGICAL]
4845 Nutrients and nutrient cycling [OCEANOGRAPHY: CHEMICAL]
4894 Instruments, sensors, and techniques [OCEANOGRAPHY: CHEMICAL]
Primary Chair: Annie Bourbonnais, University of South Carolina, School of the Earth, Ocean and Environment, Columbia, SC, United States
Co-chairs: Andreas Haas, Royal Netherlands Institute for Sea Research, Marine Microbiology & Biogeochemistry, Den Burg, Netherlands, Mark A Altabet, Univ Massachusetts Darmouth, New Bedford, MA, United States and Brett Walker, University of Ottawa, Department of Earth and Environmental Sciences, Ottawa, ON, Canada
Primary Liaison: Annie Bourbonnais, University of Massachusetts Dartmouth, New Bedford, MA, United States
A float-based autonomous three-year time-series of ODZ biogeochemistry in the Eastern Tropical N. Pacific (648112)
Mark A Altabet, University of Massachusetts Dartmouth, New Bedford, MA, United States, Craig L McNeil, Applied Physics Laboratory University of Washington, Seattle, WA, United States, Eric A D'Asaro, Applied Physics Lab, Univ of Washington, Seattle, WA, United States and Annie Bourbonnais, University of South Carolina, School of the Earth, Ocean and Environment, Columbia, SC, United States
Active, novel and unexpected methanotrophs play a key role in methane oxidation in the Gulf of Mexico hypoxic zone (651206)
Katie Howe, Florida State University, Tallahassee, United States, Kiley Seitz, University of Texas at Austin, Austin, TX, United States, Lauren Gillies, Florida State University, Earth, Ocean and Atmosphere Department, Tallahassee, FL, United States, Brett J Baker, University of Texas at Austin, United States, J. Cameron Thrash, University of Southern California, Biological Sciences, Los Angeles, CA, United States, Nancy N Rabalais, Louisiana State University, Oceanography and Coastal Sciences, Baton Rouge, LA, United States, Mary Katherine Rogener, University of Georgia, Marine Sciences, Athens, GA, United States, Samantha Benton Joye, Univ Georgia, Department of Marine Sciences, Athens, GA, United States and Olivia Mason, Florida State University, United States
Fine-scale Estimates of Net Nitrous Oxide Production Rates and Sediment Fluxes Along Vertical Gradients of Dissolved Oxygen in Muddy Sediments from a Temperate Estuary (654607)
Brett Jameson1, Celia R Walker2, Damian Grundle3 and Kim Juniper1,4, (1)University of Victoria, School of Earth and Ocean Sciences, Victoria, BC, Canada, (2)University of Calgary, Cumming School of Medicine, Calgary, AB, Canada, (3)Bermuda Institute for Ocean Science, St. Georges, Bermuda, (4)Ocean Networks Canada, Victoria, BC, Canada
Characterizing Organic Matter Composition Along Oxygen Gradients In The Eastern Tropical Pacific Oxygen Deficient Zone (655134)
Irina Koester1, Margot Elizabeth White1, Daniel Petras1, Sonia Vargas2, Pieter Dorrestein3, Michael Beman4 and Lihini Aluwihare1, (1)University of California San Diego, Scripps Institution of Oceanography, La Jolla, CA, United States, (2)University of California, Merced, Quantitative and Systems Biology, Merced, CA, United States, (3)University of California San Diego, Collaborative Mass Spectrometry Innovation Center, La Jolla, CA, United States, (4)University of California, Merced, Environmental Systems, Merced, CA, United States
Internal Leaf and Meristem O2 and H2S Dynamics of a Tropical Seagrass Identify Mechanisms of Large-Scale Die-Off Events (655606)
Marguerite Koch1, Chris R Johnson2, Conall McNicholl2, Ole Pedersen3 and Christopher J Madden4, (1)Florida Atlantic University, Biological Sciences, Boca Raton, FL, United States, (2)Florida Atlantic University, Biological Sciences Department, Boca Raton, FL, United States, (3)University of Copenhagen, Department of Biology, Copenhagen, Denmark, (4)South Florida Water Management District, Coastal Ecosystems Division, West Palm Beach, FL, United States
Microbial Community Composition, Diversity, and Activity across Oxygen Gradients within the Eastern Tropical North Pacific Oxygen Minimum Zone (657091)
Sonia Vargas1, Irina Koester2, Margot Elizabeth White2, Lihini Aluwihare2 and Michael Beman3, (1)University of California, Merced, Quantitative and Systems Biology, Merced, CA, United States, (2)University of California San Diego, Scripps Institution of Oceanography, La Jolla, CA, United States, (3)University of California, Merced, Environmental Systems, Merced, CA, United States
Time Series of Oxygen Concentration, Methane Concentration and Methane Oxidation Rate Change of Deep Santa Barbara Basin Water Column (658081)
Qianhui Qin1, Frank Kinnaman2 and Kelsey Gosselin2, (1)University of California Santa Barbara, IGPMS, Santa Barbara, CA, United States, (2)University of California Santa Barbara, Earth Science, Santa Barbara, CA, United States
Oxygen dynamics and energy metabolism of healthy and bleached corals and their implications for coral reef health and resilience (658278)
David Kline, Smithsonian Tropical Research Institute, Balboa, Panama, Lauren B Linsmayer, Scripps Institution of Oceanography, La Jolla, United States and Martin Tresguerres, Scripps Institution of Oceanography, La Jolla, CA, United States
Mixotrophic Noctiluca scintillans will continue to dominate the Arabian Sea with rising hypoxia (634981)
Yue Wen1, William Kuster2, Helga R Gomes3 and Joaquim I Goes3, (1)Macalester College, Saint Paul, MN, United States, (2)Collegiate School, New York, NY, United States, (3)Lamont Doherty Earth Obs, Palisades, NY, United States
A seasonal comparison of zooplankton vertical distribution in the OMZ of the Eastern tropical Mexican Pacific. (640035)
Jaime Farber Lorda1, Margarita Rentería2 and Ofir Molina2, (1)Centro de Investigación Científica y de Educación Superior de Ensenada, Ecología, Ensenada, BJ, Mexico, (2)Centro de Investigación Científica y de Educación Superior de Ensenada, Ecology, Ensenada, BJ, Mexico
Water Column and Sediment Microbial Ecology of a West Florida Shelf Blue Hole (642147)
Zoe Dietrich, Bowdoin College, Brunswick, ME, United States, Nastassia Patin, Georgia Institute of Technology Main Campus, School of Biological Sciences, Atlanta, GA, United States and Frank J Stewart, Georgia Institute of Technology, Atlanta, GA, United States
Parsing Meaning from Respiration Calculations in Ocean Water Columns (642530)
Theodore Packard1, N. Osma2, F Maldonado3, Ico Martinez4, Igor Fernandez-Urruzola5, Daniel Rickue Bondyale-Juez6, Vanesa Romero Kutzner6, Mayte Tames-Espinosa6, Alicia Herrera6 and May Gómez1, (1)University of Las Palmas de Gran Canaria, EOMAR, Marine Ecophysiology Group, ECOAQUA Institute, Las Palmas, Spain, (2)University of Concepción, Millenium Institute of Oceanography, Concepción, Chile, (3)Universidad El Bosque, Faculdad de Ciencias, GRIB, Bogotá, Colombia, (4)University of Las Palmas de Gran Canaria, Marine Ecophysiology Group: EOMAR, IuECOAQUA, Las Palmas de Gran Canaria, Spain, (5)Universidad de Concepcion, Millennium Institute of Oceanography, Concepción, Chile, (6)Marine Ecophysiology Group: EOMAR, Iu-ECOAQUA. University of Las Palmas de Gran Canaria, Las Palmas de Gran Canaria, Spain
Functional Diversity in an Upwelling System: Temporal Variation in a Normoxia to Hypoxia Depth Gradient (642959)
Melanie Bon1,2, Joao B Gusmao3, Maritza Fajardo4, Jacques Grall5, Chris Harrod6 and Aldo S Pacheco4, (1)Programa de Doctorado en Ciencias Aplicadas mención Sistemas Marinos Costeros, Universidad de Antofagasta, Antofagasta, Chile, (2)Ecole Doctorale Sciences de la Mer et du Littoral, Université de Bretagne Occidentale, Brest, France, (3)Universidad Católica del Norte, Department of Marine Biology, Coquimbo, Chile, (4)Instituto de Ciencias Naturales Alexander von Humboldt, Universidad de Antofagasta, Antofagasta, Chile, (5)LEMAR Laboratoire des Sciences de l'Environnement Marin (UMR 6539), IUEM/UBO, Brest, France, (6)Universidad de Antofagasta, Antofagasta, Chile
Hypoxia in surface coastal waters at the entrance of the Gulf of California and its relation to coastal upwelling (644500)
Carlos Alberto Herrera Becerril, National Autonomous University of Mexico, Posgrado en Ciencias de la Tierra, Mexico City, DF, Mexico, Joan-Albert Sanchez-Cabeza, Universidad Nacional Autonoma de Mexico, Unidad Académica Mazatlán, Instituto de Ciencias del Mar y Limnología., Mexico City, SI, Mexico, Andrea Rebeca Lara Cera, National Autonomous University of Mexico, Facultad de Ciencias, México City, DF, Mexico, León Felipe Álvarez Sánchez, Instituto de Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México, Ciudad de México, Unidad de Informática Marina, Mexico City, DF, Mexico, Maria Luisa Machain-Castillo, UNAM National Autonomous University of Mexico, Instituto de Ciencias del Mar y Limnología, Mexico City, DF, Mexico and Ana Carolina Ruiz-Fernández, Universidad Nacional Autonoma de Mexico, Unidad Académica Mazatlán, Instituto de Ciencias del Mar y Limnología, Mazatlán, SI, Mexico
