CT21A:
Abiotic and Biotic Retention, Recycling, and Remineralization of Metals in the Ocean III


Session ID#: 37174

Session Description:
Trace metals shape both the biogeochemical functioning and the biological structure of oceanic provinces, and considerable insight into trace metal distributions have been gleaned from international programs like GEOTRACES. To date, observational and modelling efforts have mainly focused on modes of external metal supply from different sources. While this has yielded important advances, we also know that metals undergo key internal transformations such as biotic uptake, scavenging, recycling, and remineralization. These internal transformations play crucial roles in shaping the biogeochemical cycling of metals by governing their bioavailability, oceanic distributions, and residence times. In this session we solicit presentations that address key questions regarding the abiotic and biotic processes regulating (i) the retention timescale for metals in the upper ocean, (ii) surface ocean metal recycling and bioavailability, (iii) the subsurface regeneration length scales for metals in the ocean interior, and (iv) the role of mineral versus organic characteristics of sinking particles on metal scavenging. We also seek presentations that provide insights into how these key questions are mediated by differing physico-chemical and microbial processes in contrasting ocean settings. Presentations showing insights from the diverse standpoints of biogeochemical oceanography and molecular ecology, from both observational and modelling perspectives, are strongly encouraged.
Primary Chair:  Philip W Boyd, University of Tasmania, Institute for Marine and Antarctic Studies, Hobart, TAS, Australia
Co-chairs:  Kristen N Buck, University of South Florida Tampa, College of Marine Science, Tampa, FL, United States; University of South Florida, College of Marine Science, St Petersburg, United States, Jessica N Fitzsimmons, Texas A&M University, Oceanography, College Station, United States and Alessandro Tagliabue, University of Liverpool, Department of Earth, Ocean and Ecological Sciences, Liverpool, United Kingdom
Moderators:  Jessica N Fitzsimmons, Texas A&M University, Oceanography, College Station, United States, Kristen N Buck, Oregon State University, College of Earth, Ocean, and Atmospheric Sciences, Corvallis, United States and Alessandro Tagliabue, University of Liverpool, Department of Earth, Ocean and Ecological Sciences, Liverpool, United Kingdom
Student Paper Review Liaison:  Alessandro Tagliabue, University of Liverpool, Department of Earth, Ocean and Ecological Sciences, Liverpool, United Kingdom
Index Terms:

4805 Biogeochemical cycles, processes, and modeling [OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL]
4807 Chemical speciation and complexation [OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL]
4840 Microbiology and microbial ecology [OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL]
4875 Trace elements [OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL]
Cross-Topics:
  • BN - Biogeochemistry and Nutrients
  • MM - Microbiology and Molecular Ecology
  • OM - Ocean Modeling

Abstracts Submitted to this Session:

Iron and carbon speciation in the far-field GP 16 Southern East Pacific Rise hydrothermal plume (314006)
Colleen Lynn Hoffman1, Sarah L Nicholas2, Jessica N Fitzsimmons3,4, Daniel C. Ohnemus5, Robert M Sherrell6, Christopher R German7, Maija Iris Heller8, Jong-Mi Lee9, Phoebe J Lam9 and Brandy M Toner10, (1)University of Washington Seattle Campus, School of Oceanography, Seattle, United States, (2)National University of Ireland, iCRAG (Irish Center for Research in Applied Geosciences), Galway, Ireland, (3)Texas A&M University College Station, Oceanography, College Station, United States, (4)Texas A&M University, Oceanography, College Station, United States, (5)Skidaway Institute of Oceanography, UGA Dept. of Marine Sciences, Savannah, United States, (6)Rutgers University, Department of Marine and Coastal Sciences and Department of Earth and Planetary Sciences, Piscataway, United States, (7)WHOI, Woods Hole, MA, United States, (8)Pontificia Universidad Católica de Valparaíso Chile, Escuela de Ciencias del Mar, Valparaiso, Chile, (9)University of California Santa Cruz, Department of Ocean Sciences, Santa Cruz, United States, (10)Department of Soil, Water and Climate, University of Minnesota, Saint Paul, MN, United States
Particulate export and upper ocean residence times of trace metals in the southeastern tropical Pacific (311367)
Erin E Black, Dalhousie University, Halifax, NS, Canada, Phoebe J Lam, University of California Santa Cruz, Department of Ocean Sciences, Santa Cruz, United States, Jong-Mi Lee, University of California Santa Cruz, Santa Cruz, United States and Ken Buesseler, Woods Hole Oceanographic Institution, Department of Marine Chemistry & Geochemistry, Woods Hole, MA, United States
Incorporation of Zinc into Frustules of Antarctic Diatoms (317781)
Ellery D Ingall1, Lesley A Brewer2, Mary Francis Moser McDaniel2 and Peter L Morton3, (1)Georgia Institute of Technology Main Campus, Atlanta, United States, (2)Georgia Institute of Technology Main Campus, Atlanta, GA, United States, (3)Texas A&M University College Station, Oceanography, College Station, TX, United States
Hydroxamate siderophores moieties responsible for scavenging Fe and particle-reactive radionuclides (Th, Pa and Po) are present in marine sinking particles as detected by ESI-FTICRMS (315548)
Chen Xu1, Peng Lin1, Kathleen Schwehr1, Wei Xing1, Luni Sun1, Alexandra Yard2, Patrick G Hatcher3, Maureen H Conte4 and Peter H Santschi5, (1)Texas A&M University at Galveston, Department of Marine Sciences, Galveston, TX, United States, (2)Texas A&M University at Galveston, Marine Biology, Galveston, TX, United States, (3)Old Dominion University, Chemistry and Biochemistry, Norfolk, VA, United States, (4)Bermuda Institute of Ocean Sciences, St.George's, Bermuda, (5)Texas A & M University, College Station, TX, United States
Dynamic Cycling of Siderophores During the Growth and Decline of an Iron-Limited Phytoplankton Assemblage in a Southern Ocean Mesocosm Experiment (317803)
Randie M Bundy, University of Washington, School of Oceanography, Seattle, United States, Kristen N Buck, University of South Florida, College of Marine Science, St Petersburg, United States, Shannon Burns, University of South Florida, College of Marine Science, St. Petersburg, United States, Alexa R Sterling, University of Rhode Island, Cell and Molecular Biology, Kingston, RI, United States, Laura Z. Holland, University of Rhode Island, Cell and Molecular Biology and Graduate School of Oceanography, Kingston, RI, United States, Daniel Repeta, Woods Hole Oceanographic Institution, Marine Chemistry and Geochemistry, Woods Hole, MA, United States, Phoebe Dreux Chappell, University of South Florida, College of Marine Science, St. Petersberg, United States and Bethany D. Jenkins, University of Rhode Island, Graduate School of Oceanography, Narragansett, RI, United States
Characterization of particulate Mn in the East Pacific Rise hydrothermal plume (314305)
Jong-Mi Lee, University of California Santa Cruz, Ocean Sciences, Santa Cruz, CA, United States, Maija Iris Heller, Pontificia Universidad Católica de Valparaíso Chile, Escuela de Ciencias del Mar, Valparaiso, Chile and Phoebe J Lam, University of California Santa Cruz, Department of Ocean Sciences, Santa Cruz, United States
A Hypothetical Role of Manganese-oxidizing Bacteria on the Distribution of Particulate Metals in the Canadian Arctic Ocean (317821)
Maria Teresa Maldonado1, Jingxuan LI2, Julie LaRoche3, Dhwani Desai3, Manuel Colombo1, Alexis Beaupré-Laperrière4, Kristin J Orians5 and Alfonso Mucci4, (1)University of British Columbia, Department of Earth, Ocean and Atmospheric Sciences, Vancouver, BC, Canada, (2)MIT-WHOI Joint Program, Chemical Oceanography, Woods Hole, MA, United States, (3)Dalhousie University, Department of Biology, Halifax, NS, Canada, (4)McGill University, Department of Earth and Planetary Sciences, Montreal, QC, Canada, (5)Univ British Columbia, Department of Earth, Ocean and Atmospheric Sciences, Vancouver, BC, Canada

See more of: Chemical Tracers, Organic Matter and Trace Elements