sea-level rise, and circulation in florida bay >
Project Proposal for 1999
Project Title: Sedimentation, Sea-Level Rise, and Circulation in Florida Bay
Project Chief: Robert B. Halley
Program(s): Integrated Natural Resource Science Program
Program Element(s)/Tasks: South Florida Study Area, Element 7 (Florida Bay, Florida Keys, and the Coral Reefs), Task 7.1 (Florida Bay Turbidity, Bathymetry and Sedimentation)
Collaborators/Clients (names, affiliation, roles):
Project Summary: The goal of this USGS project is to document decade- to century- scale processes associated with sediment production and transport in Florida Bay. The results will be compared to short-term production rates measured during FY 1999.
Project Objectives: Five interrelated activities are completed or almost completed for this project: 1) core analyses; 2) local sediment elevation surveys; 3) mudbank profiling and surveys; 4) integration of sedimentary analyses with circulation patterns and sea-level history; and 5) salinity surveys to document effects of mudbanks on circulation. A sixth activity, the measurement of short-term productivity and carbonate precipitation, will be completed during the summer of 1999. These data will provide the measurements necessary for a comparison of current sedimentation rates with long-term sediment accumulation measures by lead-210 dating and elevation surveys from previous year of the project.
Overall Strategy: Coring and lead-210 dating for this project have been completed. Four activities will continue and be completed during FY 1999. They are:
1) Sediment elevation stations will be surveyed for the last time in FY 1999.WORK PLAN
Timeline: Regular (semimonthly) meetings are planned with clients through committee and group activities and as required by our cooperative agreement. Field work is planned for two weeks during the winter or 1998/1999 and two weeks during the summer of 1999 to complete data collection. Field work is subject to delay or extension pending weather, availability of boats and vehicles, etc.
FY 1999 activities: All activities except productivity and calcification
measurements have been described in previous workplans. Productivity measurements
in Florida Bay, including calcification and net photosynthesis, will be
performed using geochemical techniques that have proven successful for
measuring production in carbonate reef and seagrass bed ecosystems (Smith
1973, Barnes 1983, Barnes and Devereux 1984, Frankignoulle and Disteche
1984, Gattuso et al. 1993). These measurements will be used to provide
insight into the discrepancy between long term sediment accumulation rates
(Stockman et. al,. 1967) and short term production measurements (Bosence,
Barnes, D.J. and Devereux, M.J. 1984. Productivity and calcification on a coral reef: a survey using pH and oxygen electrode techniques. Journal of Experimental Marine Biology and Ecology 79:213-231.
Boscence, D. 1989a. Biogenic carbonate production in Florida Bay. Bull. Mar. Sci. 44(1): 419-433
Frankignoulle, M. 1988. Field measurements of air-sea CO2 exchange. Limnology and Oceanography 33(3):313-322.
Frankignoulle, M. and Disteche, A. 1984. CO2 chemistry in
the water column above a Posidonia seagrass bed and related air-sea exchanges.
Oceonol. Acta 7(2):209-
Gattuso, J.P., Pichon, M., Delesalle, B., and Frankignoulle, M. 1993. Community metabolism and air-sea CO2 fluxes in a coral reef ecosystem (Moorea, French Polynesia. Marine Ecology Progress Series 96:259-267.
Kayanne, H., Suzuki, A., and Saito, H. 1995. Diurnal changes in the partial pressure of carbon dioxide in coral reef water. Science 269:214-216.
Millero, F.J. The thermodynamics of the carbonate system in seawater. Geochimica et Cosmochimica Acta 43:1651-1661.
Smith, S.V. 1973. Carbon dioxide dynamics: a record of organic carbon production, respiration, and calcification in the Eniwetok reef flat community. Limnology and Oceanography 18(1): 106-120.
Smith, S. V., and Key, G. 5., 1975. 1975 Carbon dioxide and metabolism in marine environments. Limnology and Oceanography 20:493-495
Stockman, K.W., R.N. Ginsburg, and E.A. Shinn. 1967. The production of lime mud by algae in South Florida. J. Sediment Petrol. 37(2): 633-648.
Sugiura, Y., Ibert, E.R., and Hood, D.W. 1963. Mass transfer of carbon dioxide across sea surfaces. Journal of Marine Research 2 1(1): 11-24.
Wanninkhof, R. 1992. Relationship between wind speed and gas exchange over the ocean. Journal of Geophysical Research 97:7373-73 82.
FY 1999 Deliverables/Products: We plan presentation at the USGS South Florida Ecosystem Meeting, the annual Florida Bay Science Conference, and one national meeting. Abstracts will be written, reviewed and approved for all meetings that require formal presentations. One journal manuscript will be prepared. Semimonthly salinity maps of Florida Bay will continue to be produced. All results are posted on the internet or presented at science meetings. Results are conveyed to management at managers meetings, through workplans, proposals, and reports.
FY1999 Outreach Activities:
New Directions, Expansion of Continuing Project
ACCOMPLISHMENTS, OUTCOMES, PRODUCTS, OUTREACH
FY 1998 Accomplishments, Outcomes, Including Outreach
FY 1997 Deliverables, Products completed
2. Halley, R. B., Vacher, L. H., Shinn, E. A. 1997 Geology and hydrogeolgy of the Florida Keys, in Vacher, H. L. and Quinn, T. E., editors, The Geology and Hydrogeology of Carbonate Islands, Elsevier, New York, pp. 2 17-248.
3. Halley, R. B., Holmes, C. W., Prager, E. J., 1997, Florida Bay Mud Banks: Relatively New Piles of Mostly Old Sediments, U.S. Geological Survey Open-File Report 97-385, p. 26-27.
4. Halley, R. B., Holmes, C. W., Prager, E. J., 1997, The Dual Roles of Florida Bay Mudbanks in Restoration, Program and Abstracts, Society for Ecological Restoration, 9th International Conference, Fort Lauderdale FL, USA Nov. 12-15, 1997, p.70.
5. Halley, R. B., Holmes, C. W., Prager, E. J., 1997, Seagrass Facies and Phases Recorded in the Sediments of Florida Bay, Conference Program with Abstracts, Walt Dineen Society Annual Meeting, North Miami Beach, Fl, 1997, p. 44.
6. Prager, E. J., and Halley, R. B., 1997, Bottom types of Florida Bay, U.S. Geological Survey Open-File Report 97-526.
7. Halley, R. B., Cronin, T. M., Wingard, G. L. and Ishman, S. E., 1998, Increased salinity of Florida Bay and saltwater Intrusion of the Biscayne Aquifer during the early 20th Century: Simultaneous consequences of falling water tables along the margins of the Everglades, in Proceeding of the 1998 Florida Bay Science Conference, Sea Grant, University of Florida, p 22-23.
8. Halley, R. B., 1998, West Everglades winter freshets during the current wet period and seasonal phase shifts in salinity cycles across Florida Bay, in Proceeding of the 1998 Florida Bay Science Conference, Sea Grant, University of Florida, p 24.
PROJECT SUPPORT REQUIREMENTS
Names and expertise (e.g. carbonate petrology) of key project staff (list by fiscal year for duration of project):
Halley (carbonate sedimentation, overall coordination, FY 1999,)
Other required expertise for which no individual has been identified: none
Major equipment/facility needs (list by fiscal year for duration of project): FY1999 - An alkalinity titrator is required for the productivity measurments