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15 -- The Evolution of the Biogeochemical Cycling of Phosphorus and other Bioessential Elements
TWO ORAL SESSIONS
TUESDAY, April 15, 2008: MORNING
The Evolution of the Biogeochemical Cycling of Phosphorus and Other Bioessential Elements: Sources of Bioessential Elements
TUESDAY, April 15, 2008: AFTERNOON
The Evolution of the Biogeochemical Cycling of Phosphorus and Other Bioessential Elements: Cycles of Bioessential Elements
Matthew Pasek
University of Arizona
Tucson, AZ, USA
Dominic Papineau
Carnegie Institution of Washington
Washington, DC, USA
Jelte Harnmeijer
University of Washington
Seattle, WA, USA
Description
The origin and evolution of geochemical cycles of bioessential elements is intimately related to the origin and evolution of life on Earth. The biogeochemical cycles of carbon, nitrogen, phosphorus, sulfur and iron were indubitably affected by changes in conditions at the Earth’s surface, such as variations in the redox state of the atmosphere and oceans, climate change, and the availability of primary sources of these elements. This session aims to bring together researchers studying the evolution of element cycling from the early Earth to the present day.
We particularly invite abstracts focused on phosphorus, a key element for life which plays a major role in replication, metabolism, and cellular structure. Because of these important functions, phosphorus has been an essential nutrient in biogeochemical cycles since the emergence of life on Earth and its scarcity has imposed limitations on primary productivity. For instance, the evolution of the phosphorous cycle is evidenced by the occurrence of temporally restricted phosphorite deposits in the rock record. However, the evolution of the phosphorus cycle over geological time scales remains poorly understood. A more complete comprehension of the biogeochemical cycle of phosphorus and other interconnected elements will come from studies in cosmochemistry, prebiotic chemistry, oceanography, geology, biochemistry and microbial ecology. Abstract submissions from all these varied perspectives are encouraged.
ORAL SESSIONS
TUESDAY, April 15, 2008: MORNING
The Evolution of the Biogeochemical Cycling of Phosphorus and Other Bioessential Elements: Sources of Bioessential Elements
9:45 15-21-O. Phosphorus Chemistry in the Interstellar Medium: From Circumstellar
Shells to Meteorites? L. Ziurys, D.T. Halfen, E.D. Tenenbaum, N.J. Woolf
10:00 15-11-O. Phosphorus Redox Chemistry within Planetary Environments [invited]
T. Kee, D.E. Bryant, D. Greenfield
10:15 15-16-O. Identifying Biogeochemical Phosphorus Redox Pathways M. Pasek
10:30 BREAK
10:45 15-03-O. Recent Advances in the Prebiotic Phosphorylation of Nucleosides
and Nucleoside Analogues H. Cleaves
11:00 15-18-O. Abiotic Nitrogen Reduction in Hadean Hydrothermal Systems
A. Smirnov, D. Hausner, R Laffers, F.M. McCubbin, D.R. Strongin, M.A. Schoonen
TUESDAY, April 15, 2008: AFTERNOON
The Evolution of the Biogeochemical Cycling of Phosphorus and Other Bioessential Elements: Cycles of Bioessential Elements
3:15 15-04-O. The Marine Phosphorus Cycle in the Archean and Paleoproterozoic
[invited] A. Colman
3:30 15-02-O. Using O-Isotopes to Trace the Evolution of Biogeochemical Cycling of
Phosphorus R. Blake
3:45 15-12-O. Was There Really an Archean Ocean Phosphate Crisis?
S. Lalonde, K.O. Konhauser
4:00 15-09-O. Fractionation of Oxygen Isotopes in Phosphate During Phosphate-Iron
Oxide Interactions D. Jaisi, R.E. Blake
4:15 BREAK
4:30 15-20-O. Chemical Weathering and Gas Transfers During Microbial Acquisition
of P from Basalt L. Wu, A.D. Jacobson
4:45 15-05-O. The Black Sea Nitrogen Cycle: a Glimpse into the Mid-Proterozoic
C.A. Fuchsman, J. Kirkpatrick, J.T. Staley, J.W. Murray
5:00 15-06-O. The Co-Evolution of Nitrogen and Molybdenum Biogeochemical Cycles:
Mo Requirements for Nitrogen Assimilation in Diazotrophic Heterocystous
Cyanobacteria J. Glass, F. Wolfe-Simon, A. Anbar
POSTERS
15-01-P. Pyrophosphate and Triphosphate Production Near Hadean Beach Natural
Nuclear Reactors Z. Adam, M.A. Pasek
15-07-P. Evolution of Photosynthesis and Biospheric Oxygenation Are Contingent Upon
Nitrogen Fixation? J. Grula
15-08-P. Nitrogen Cycling in a Novel Symbiosis: An Examination of Nitrogen Fixation
by an Endosymbiont in a Marine Shipworm R. Horak, D. Distel, J.P. Montoya
15-10-P. Compound Specific Nitrogen Isotopes Utilizing Multiple Geoporphyrins and
Chlorins During Cretaceous Oceanic Anoxic Events, Understanding the Impact
of Redox Changes on the Nitrogen Cycle
C.K. Junium, M.A. Arthur, B.J. Keely, K.H. Freeman
15-13-P. Tracking the Rise of Atmospheric Oxygen and Related Environmental Changes
During the Paleoproterozoic: 3.6 km of Drillcores from 2.5-2.0 Ga Rocks from
Russian Fennoscandia A. Lepland, V. Melezhik, L.R. Kump
15-14-P. The Use of Molecular Techniques to Explore Nitrogen Fixation and Utilization
among Freshwater Phytoplankton L.A. Martinez, D. Caprioglio, J. Lake
15-15-P. Evaluation of Biological and Enzymatic Activity of Soil in Tropical Dry Forest –
Desierto de la Tatacoa (Colombia) with Potential Application in Mars
Terraforming and Similar Planets Andrés Moreno
15-17-P. Evidences Support an Extraordinary Event, Possibly an Impact During the
Proterozoic for Phosphorus Abundance on the Earth M.S. Sisodia
15-19-P. Did Nature Also Choose Arsenic? F. Wolfe-Simon, P.C.W. Davies, A.D. Anbar