HR: 0800h
AN: B51B-0366    [Abstracts]
TI: The Ecology and Trace Metal Geochemistry of Living Benthic Foraminifera in the Venice Lagoon, Italy
AU: * Rathburn, A E
EM: arathburn@indstate.edu
AF: Indiana State University Geology Program, 159 Science Bldg., Terre Haute, IN 47809, United States
AU: * Rathburn, A E
EM: arathburn@indstate.edu
AF: Scripps Institution of Oceanography, IOD-0218 9500 Gilman Drive, La Jolla, CA 92093, United States
AU: Basak, C
EM: basakc1@gmail.com
AF: University of Florida Dept. of Geological Sciences, 241 Williamson Hall, Gainesville, FL 32611, United States
AU: Perez, M E
EM: elep@nhm.ac.uk
AF: The Natural History Museum Paleontology Dept., Cromwell Road, London, SW75BD, United Kingdom
AU: Gieskes, J M
EM: bgieskes@worldnet.att.net
AF: Scripps Institution of Oceanography, IOD-0218 9500 Gilman Drive, La Jolla, CA 92093, United States
AU: Sadekov, A Y
EM: aleksey.sadekov@anu.edu.au
AF: Australian National University Research School of Earth Science, 220 Mills Road, Canberra, ACT 0200, Australia
AU: Eggins, S M
EM: Stephen.Eggins@anu.edu.au
AF: Australian National University Research School of Earth Science, 220 Mills Road, Canberra, ACT 0200, Australia
AU: Brouillette, E
EM: ellen.brouillette@gmail.com
AF: Indiana State University Geology Program, 159 Science Bldg., Terre Haute, IN 47809, United States
AU: Gray, C
EM: cgray10@gmail.com
AF: Indiana State University Geology Program, 159 Science Bldg., Terre Haute, IN 47809, United States
AU: Kluesner, J
EM: jared.kluesner@gmail.com
AF: Scripps Institution of Oceanography, IOD-0218 9500 Gilman Drive, La Jolla, CA 92093, United States
AU: Deheyn, D D
EM: ddeheyn@ucsd.edu
AF: Scripps Institution of Oceanography, IOD-0218 9500 Gilman Drive, La Jolla, CA 92093, United States
AU: Barbanti, A
EM: andrea.barbanti@thetis.it
AF: Instituto Centrale per la Ricerca scientifica, Applicata al Mare Casalotti 30000166, Rome, 00198, Italy
AU: Nasci, C
EM: Cristina.Nasci@thetis.it
AF: Thetis SpA, Castello 2737, Venice, 30122, Italy
AB: The ecology and trace metal geochemistry of living benthic foraminifera in the Venice Lagoon was assessed as part of an ongoing international effort examining biological and biogeochemical responses to environmental changes in Lagoonal sediments (SIOSED). The "SIOSED" project is part of a comprehensive effort to support the integrated management of Venice Lagoon sediments and ecosystems promoted by the Venice Water Authority through its Concessionary, Consorzio Venezia Nuova. Living (Rose Bengal-stained) benthic foraminiferal assemblages (greater than 150 microns) were dominated by Ammonia tepida, Haynesina germanica, and Quinqueloculina sp. Differences in spatial and vertical distribution patterns of these foraminiferal taxa appear to reflect differences in the availability of contaminants. Laser ablation ICPMS analyses of Mn, Mg, Zn, Pb, As, Cd, Al, and V in foraminiferal calcite showed that some trace element concentration ratios, particularly zinc/calcium, varied between sites and between species. Differences in trace metal signatures from foraminifera living at different sites may be related to bioavailable pollutant concentrations and/or to redox processes that release adsorbed trace metals from reducible phases (e.g., iron oxides). Results provide calibration data for contaminant proxies of spatial and temporal environmental differences.
DE: 0409 Bioavailability: chemical speciation and complexation
DE: 0439 Ecosystems, structure and dynamics (4815)
DE: 0459 Macro- and micropaleontology (3030, 4944)
DE: 0473 Paleoclimatology and paleoceanography (3344, 4900)
DE: 0478 Pollution: urban, regional and global (0345, 4251)
SC: Biogeosciences [B]
MN: 2007 Fall Meeting