Clinton Hittle; Joan Browder; Maria Criales; John Wang
The objectives of these project are broadly: 1) to develop and implement (with other agency members) a program of research to support the restoration of Florida Bay; 2) with other PDT members to develop and evaluate restoration alternatives for Florida Bay and 3) with other committee members to develop performance measures and assess restoration alternatives affecting Florida Bay, Biscayne Bay, Barnes Sound and Manatee Bay and the lower southwest coast mangrove estuaries.
40001 State Road 9336
Robblee, M. B.
Restrepo, V. R.; Rice, J. K.; Robblee, M. B.; Zein-Eldin, A.
Moore, D.
1) to document long-term responses of the seagrass associated shrimp and fish community in Johnson Key Basin to environmental conditions (e.g. salinity) and changes in seagrass habitat;
2) to develop performance measures relating the fish and crustacean communities of southern Biscayne Bay to salinity and habitat and
3) to evaluate postlarval immigration (seasonal timing and abundance) to and into Florida Bay in relation to environmental conditions and habitat. The pink shrimp is a species of special interest in each of the above studies because it has been chosen as an indicator species for use in restoration of south Florida estuaries. Empirical and experimental data developed in these studies will be used to support the development of a pink shrimp landscape simulation model and restoration performance measures.
40001 State Road 9336
1. Estimate volume transport in the six channels being sampled for postlarvae. 2. Construct rating curves at each station under a variety of tidal flow conditions in order to improve volume transport estimates. 3. Compare volume transport among the six stations in a comparison of postlarval immigration into Florida Bay. 4. Participate in the development of a transport module for the pink shrimp simulation model.
Measurements of flow, stage, and salinity will continue in FY 2003 in the six channels being sampled for post larvae. In collaboration with Dr. Joan Browder of NOAA these data will be applied to the construction of the larval transport module for the pink shrimp simulation module. Methods developed to date and in other studies will continue to be employed. Acoustic Doppler Velocity Meters (ADVM) have been installed at the instrumented sites and are used to measure continuous (15- minute) water velocity. A boat-mounted Acoustic Doppler Current Profiler (ADCP) is used to calculate total discharge along a transect of the channels during inspections. The ADCP also measures water depth, boat speed, and direction of boat movement using acoustic reflections from the streambed. Discharge and flow direction are both calculated from data collected with the ADCP. The mean velocity for the creek section is calculated by dividing the total discharge measured with the ADCP by the cross-sectional area corresponding to the water level at the time of the discharge measurement. The cross-sectional area is computed by using site-specific stage-area ratings. A velocity rating between the mean ADCP velocity and the in situ ADVM velocity is calculated by regression analysis. This rating equation is then used to calculate continous discharge using the velocity data. Stage measurements are made acoustically and through water pressure in the ADVM and Salinity instrumentation respectively. Stage is used to define the cross-sectional area over which flow measurements are made, and are used in the regression analysis between flow and stage. Salinity measured near the surface and bottom of each channel to quantify the vertical stratification present at each site, which could be detrimental to acoustic signals. Additionally, temperature is measured to monitor possible vertical temperature gradients that could be detrimental to acoustic signals and as a necessary parameter to calculate salinity from conductivity.
1. The CESI sponsored long-term study entitled 'Temporal and spatial variation in seagrass associated fish and invertebrates in Johnson Key Basin, western Florida Bay, with emphasis on the pink shrimp, Farfantepenaeus duorarum' will document long-term responses of the seagrass associated shrimp and fish community in Johnson Key Basin to environmental conditions (e.g. salinity) and changes in seagrass habitat
2. with Joan Browder the SFWMD sponsored study entitled 'Biscayne Bay Coastal and Nearshore Community Baseline Study to Develop Biological Performance Measures' will develop performance measures relating the fish and crustacean communities of southern Biscayne Bay to salinity and habitat
3 with Joan Browder, Maria Criales and Clinton Hittle the NOAA sponsored study entitled 'Immigration pathways of pink shrimp postlarvae into and within Florida Bay' will evaluate postlarval immigration (seasonal timing and abundance) to and into Florida Bay in relation to environmental conditions and habitat. The pink shrimp is a species of special interest in each of the above studies because it has been chosen as an indicator species for use in restoration of south Florida estuaries. Empirical and experimental data developed in these studies will be used to support the development of a pink shrimp landscape simulation model and restoration performance measures.
40001 State Road 9336
U.S. Department of the Interior, U.S. Geological Survey
Comments and suggestions? Contact: Heather
Henkel - Webmaster
Generated by mp version 2.8.18 on Mon May 11 17:30:13 2009