CT41A:
Trace Metal Bioavailability and Metal-Microorganism Interactions I


Session ID#: 11309

Session Description:
The distributions of trace elements in the marine environment are undeniably linked to biological processes. Low concentrations or low bioavailability of trace metals in the water column can lead to micronutrient limitation and stress, while greater availability may increase biological demand and enhance the growth of microorganisms. Recent advances in high throughput biological techniques, including “omics”, as well as high-resolution geochemical data from the GEOTRACES program (www.geotraces.org) has lead to a wealth of new data. However, meaningful interpretation of these data often still relies on process studies, incubation-based experimental work, or the culturing of representative or novel organisms. This session invites contributions on every scale of metal-microorganism interactions, ranging from small-scale mechanistic work to large-scale biogeochemical cycle studies. We encourage abstracts that investigate trace metal acquisition strategies, cellular metabolism, chemical speciation and bioavailability, and/or studies that link trace metal and biological water column data. Presentations that strive to better understand the biological control exerted on the distribution of trace elements in the marine environment are especially encouraged.
Primary Chair:  Julia Gauglitz, Woods Hole Oceanographic Institution, Marine Chemistry and Geochemistry, Woods Hole, MA, United States
Chairs:  Randelle M Bundy, Woods Hole Oceanographic Institution, Marine Chemistry and Geochemistry, Woods Hole, MA, United States and Jill N Sutton, IUEM/UBO, Technopôle Brest-Iroise, Place Nicolas Copernic, Plouzané, France
Moderators:  Julia Gauglitz1, Randelle M Bundy1 and Jill N Sutton2, (1)Woods Hole Oceanographic Institution, Marine Chemistry and Geochemistry, Woods Hole, MA, United States(2)IUEM/UBO, Technopôle Brest-Iroise, Place Nicolas Copernic, Plouzané, France
Student Paper Review Liaisons:  Randelle M Bundy, Woods Hole Oceanographic Institution, Marine Chemistry and Geochemistry, Woods Hole, MA, United States and Julia Gauglitz, Woods Hole Oceanographic Institution, Marine Chemistry and Geochemistry, Woods Hole, MA, United States
Index Terms:

4807 Chemical speciation and complexation [OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL]
4840 Microbiology and microbial ecology [OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL]
4845 Nutrients and nutrient cycling [OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL]
4875 Trace elements [OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL]
Co-Sponsor(s):
  • B - Biogeochemistry and Nutrients
  • MM - Microbiology and Molecular Biology

Abstracts Submitted to this Session:

CT41A-01
Response of Phytoplankton Iron Contents to Gradients in Iron Availability in the California Current System (93767)
Benjamin S Twining1, Jeremy E Jacquot1, Sara Rauschenberg1, Jade Enright1, Adrian Marchetti2, Natalie Cohen3, Matthew Brown4, Claire Parker5 and Kenneth W Bruland5, (1)Bigelow Lab for Ocean Sciences, East Boothbay, ME, United States, (2)University of North Carolina at Chapel Hill, Marine Sciences, Chapel Hill, NC, United States, (3)University of North Carolina at Chapel Hill, Department of Marine Science, Chapel Hill, NC, United States, (4)Flagler College, Natural Sciences, St Augustine, FL, United States, (5)University of California Santa Cruz, Santa Cruz, CA, United States
CT41A-02
Revealing sources and chemical identity of iron ligands across the California Current System (91993)
Rene Boiteau, Woods Hole Oceanographic Institution, Woods Hole, MA, United States, Daniel Repeta, Woods Hole Oceanographic Institution, Department of Marine Chemistry and Geochemistry, Woods Hole, MA, United States, Jessica N Fitzsimmons, Texas A&M University College Station, Department of Oceanography, College Station, TX, United States, Claire Parker, University of California Santa Cruz, Santa Cruz, CA, United States, Benjamin S Twining, Bigelow Lab for Ocean Sciences, East Boothbay, ME, United States and Stephen B Baines, Stony Brook University, Department of Ecology and Evolution, Stony Brook, NY, United States
CT41A-03
Is iron(II) an important form of bioavailable iron in seawater? (89708)
James Moffett, University of Southern California, Department of Biological Sciences, Los Angeles, CA, United States, Kenneth McCarthy Bolster, University of Southern California, Department of Earth Sciences, Los Angeles, CA, United States and Natalianne Tuttle, Humboldt State University, CA, United States
CT41A-04
Mercury Stable Isotopes Reveal Deep Methylation of Mercury and its Uptake into the Open Ocean Food Web (90202)
Laura C Motta1, Joel D Blum1, Marcus W Johnson1, Brian N Popp2, Jeffrey Drazen3, Cecelia C Hannides3, Hilary G Close4, Blaire Umhau5 and Claudia R Benitez-Nelson5, (1)University of Michigan, Earth and Environmental Sciences, Ann Arbor, MI, United States, (2)University of Hawaii, Geology & Geophysics, Honolulu, HI, United States, (3)University of Hawaii, Oceanography, Honolulu, HI, United States, (4)University of California Santa Cruz, Institute of Marine Sciences, Santa Cruz, CA, United States, (5)University of South Carolina, Department of Earth and Ocean Sciences, Columbia, SC, United States
CT41A-05
Tracing Cobalt Uptake and Allocation in Prochlorococcus with Metalloproteomics (92530)
Nicholas Hawco1,2, Matthew McIlvin3 and Mak A Saito3, (1)University of Southern California, Earth Sciences, Los Angeles, CA, United States, (2)MIT/WHOI Joint Program, Woods Hole, MA, United States, (3)Woods Hole Oceanographic Institution, Woods Hole, MA, United States
CT41A-06
High Iron Requirement for Growth, Photosynthesis, and Low-light Acclimation in the Marine Cyanobacterium Synechococcus bacillaris (87899)
William G Sunda, University of North Carolina, Marine Sciences, Chapel Hill, NC, United States and Susan A Huntsman, NOAA Beaufort Laboratory, Beaufort, NC, United States
CT41A-07
Organic Exudates Enhance Iron Bioavailability to Trichodesmium (IMS101) by Modifying Fe Speciation (91136)
Hanieh Tohidi Farid1, Andrew Rose1,2 and Kai Schulz3, (1)Southern Cross university, Southern Cross Geoscience, Lismore, Australia, (2)Southern Cross University, School of Environment, Science and Engineering, Lismore, Australia, (3)Southern Cross University, Centre for Coastal Biogeochemistry, School of Environmental Science and Management, Lismore, Australia
CT41A-08
Microbes adapt to iron scarcity through siderophore production across the eastern tropical Pacific (90713)
Daniel Repeta, Woods Hole Oceanographic Institution, Department of Marine Chemistry and Geochemistry, Woods Hole, MA, United States, Rene Boiteau, Woods Hole Oceanographic Institution, Woods Hole, MA, United States, Daniel Richard Mende, University of Hawaii at Manoa, C-MORE, Honolulu, HI, United States and Edward DeLong, University of Hawaiʻi at Mānoa, Department of Oceanography, School of Ocean and Earth Science and Technology, Honolulu, HI, United States
See more of: Chemical Tracers, DOM and Trace Metals