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University of South Florida

2007

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A Gis-Based Approach To Evaluating Changes In Wetland Areal Extent And Structure Between 1926 And 1999 For Selected Hydrological Sub-Basins In Pinellas County, Florida, Pamela J. Fetterman Nov 2007

A Gis-Based Approach To Evaluating Changes In Wetland Areal Extent And Structure Between 1926 And 1999 For Selected Hydrological Sub-Basins In Pinellas County, Florida, Pamela J. Fetterman

USF Tampa Graduate Theses and Dissertations

A GIS-based study was undertaken comparing wetland coverages in 1926 and 1999 in selected sub-basins within Pinellas County, Florida, one of the most highly urbanized counties in south-central Florida with almost 50% of the existing land area developed into industrial, commercial or residential land uses (Pinellas County Planning Department, 2002). Wetlands were digitized from rectified 1926 aerials and classified according to the FLUCCS classification system. Wetland coverage for the 1999 data set was extracted from FLUCCS 1999 land use coverage provided by the SWFWMD, and topology for both the 1926 and 1999 wetland and surface waters were created. Statistical and …


Enduring Changes In Reward Mechanisms After Developmental Exposure To Cocaine: The Role Of The D2 Receptor, Kirstie H. Stansfield Jun 2007

Enduring Changes In Reward Mechanisms After Developmental Exposure To Cocaine: The Role Of The D2 Receptor, Kirstie H. Stansfield

USF Tampa Graduate Theses and Dissertations

During adolescent brain maturation, there are likely sensitive periods where environmental conditions, including drug exposure, may influence development by modifying neuronal connections. Altering neuronal function may produce different phenotypes than expected under normal conditions that may influence subsequent responding to drugs of abuse after the brain is fully mature. Experiment one investigated the relationship between novelty preference and cocaine place preference in adolescent and adult rats. High responding adolescent rats displaying greater free choice novelty exploration (but not forced novelty locomotion) expressed decreased cocaine place conditioning compared to low responding rats. No relationship was found in adult rats. Experiment two …