Florida Bay sediment geochemical dataEntry ID: USGS_SOFIA_orem_fb_sed_geochem
Abstract: The data set contains the sample ID, depth (cm), sediment size, fine sediment fraction (<60m), total C %, organic C %, total N %, total P %, C/N, C/P, and N/P.
This project is examining (1) sources of nutrients, sulfur, and carbon to wetlands of south Florida, (2) the important role of chemical and biological processes to the wetland sediments (biogeochemical processes) in the cycling of these ... elements, and (3) the ultimate fate (i.e. sinks) of these elements in the ecosystem. The focus on nutrients and carbon reflects the problem of eutrophication in the northern Everglades, where excess phosphorus from agricultural runoff has dramatically altered the biology of the ecosystem. Results will be used by land and water managers to predict the fate of nutrients (especially phosphorus) in contaminated areas of the Everglades, and to evaluate the long-term effectiveness of buffer wetlands being constructed as nutrient removal areas. Studies of sulfur in the ecosystem are important for understanding the processes involved in mercury methylation in the Everglades. Methyl mercury (a potent neurotoxin) poses a severe health risk to organisms in the south Florida ecosystem and to humans. Sediment studies conducted by this project will also be used to construct a geochemical history of the ecosystem. An understanding of past changes in the geochemical environment of south Florida provides land and water managers with baseline information on what water quality goals for the ecosystem should be, and on how the ecosystem has responded to past environmental change and will likely respond to the changes that will accompany restoration.
Data Set Citation
Dataset Originator/Creator: William Orem
Dataset Title: Florida Bay sediment geochemical data
Dataset Release Date: 2005Online Resource: http://sofia.usgs.gov/exchange/orem/oremsed.html
Start Date: 1996-01-01Stop Date: 1996-12-31
Latitude Resolution: 0.001
Degrees, minutes, and decimal seconds
Longitude Resolution: 0.001
Degrees, minutes, and decimal seconds
BIOSPHERE > TERRESTRIAL ECOSYSTEMS > WETLANDS
TERRESTRIAL HYDROSPHERE > WATER QUALITY/WATER CHEMISTRY > NITROGEN COMPOUNDS
TERRESTRIAL HYDROSPHERE > WATER QUALITY/WATER CHEMISTRY > PHOSPHOROUS COMPOUNDS
TERRESTRIAL HYDROSPHERE > WATER QUALITY/WATER CHEMISTRY > RADIOISOTOPES
OCEANS > OCEAN CHEMISTRY > CARBON
OCEANS > OCEAN CHEMISTRY > RADIONUCLIDES
BIOSPHERE > AQUATIC ECOSYSTEMS > WETLANDS
Quality Missing data is indicated by "nd" in the spreadsheet.
Access Constraints None
Use Constraints None. Acknowledgement of the U.S. Geological Survey would be appreciated for products derived from these data.
Data Set Progress
Distribution Size: 0.44
Distribution Format: MS Excel
Role: TECHNICAL CONTACT
Email: borem at usgs.gov
U.S. Geological Survey 12201 Sunrise Valley Drive
Province or State: VA
Postal Code: 20192
Role: DIF AUTHOR
Email: alicia.m.aleman at nasa.gov
Goddard Space Flight Center Code 610.2
Province or State: MD
Postal Code: 20771
Orem, William H., Lerch, Harry E.; Rawlik, Peter, 1997, Geochemistry of Surface and Pore Water at USGS Coring Sites in Wetlands of South Florida: 1994 and 1995, USGS Open-File Report, OFR 97-454, St. Petersburg, FL, U.S. Geological Survey.
Bates, Annie L., Spiker, Elliott C.; Holmes, Charles W., 1998, Speciation and isotopic composition of sedimentary sulfur in the Everglades, Florida, USA, Chemical Geology, 146 (3-4), Amsterdam, Netherlands, Elsevier.
Orem, W. H., Holmes, C. W.; Kendall. C.; Lerch, H. E.; Bates, A. L.; Silva, S. R.; Boylan, A.; Corum, M.; Marot, M.; Hedgman, C.,1999, Geochemistry of Florida Bay sediments: I. nutrient history at five sites in eastern and central Florida Bay, Journal of Coastal Research, v. 15, Royal Palm Beach, FL, Coastal Research and Education Foundation (CERF), The entire paper is available from the Journal of Coastal Research website at http://www.cerf-jcr.org Journal membership is required for download.
Creation and Review Dates
DIF Creation Date: 2007-02-27
Last DIF Revision Date: 2009-02-24