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Title
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Determination of historic geochemistry and tropic alternations of Apalachicola, FL.
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Creator
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Donatto Surratt
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Abstract/Description
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Land use changes are shown to alter the balance of sources and sinks of coastal systems and these alterations are often preserved in the sediment records. In the Apalachicola Bay, productivity has been dependent on freshwater discharge from the Apalachicola-Chattahoochee-Flint (ACF) River Basin. Alterations to ACF watershed flow by diversions constructed since the 1950s and localized disturbances (i.e., dredging, urbanization) threaten the productivity of the bay. Historic water quality data...
Show moreLand use changes are shown to alter the balance of sources and sinks of coastal systems and these alterations are often preserved in the sediment records. In the Apalachicola Bay, productivity has been dependent on freshwater discharge from the Apalachicola-Chattahoochee-Flint (ACF) River Basin. Alterations to ACF watershed flow by diversions constructed since the 1950s and localized disturbances (i.e., dredging, urbanization) threaten the productivity of the bay. Historic water quality data indicates that salinity has increased by ~40% bay-wide. The first objective of this research was to test the hypothesis that profiles for C, N, and P concentrations and 813C and SISN stable isotopic signatures could be applied to benchmark historic natural and anthropogenic activity with in the bay. The second objective was to test the hypothesis that historic nutrient data from cores could be used to assess bay wide productivity, based on phytoplankton biomass, using niche modeling techniques. Our approach to evaluate the first hypothesis was 1) compare historic (past 50 years) river discharge patterns and mass sedimentation rates to C, N, and P concentration and 513 C and ESISN stable isotopic profiles at the river mouth; 2) differentiate between riverine organic matter (OM) and re-suspended OM depositions
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Date Issued
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2005
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Identifier
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AM00000304_00001, famu:49740
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Format
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E-book
