Open Access. Powered by Scholars. Published by Universities.®
- Keyword
- Publication
- Publication Type
Articles 1 - 19 of 19
Full-Text Articles in Life Sciences
Genetic Variation In Chrysopsis Floridana Small, The Endangered Florida Golden Aster, As Revealed By Random Amplification For Polymorphism Detection (Rapd), Laurie Lysle Walker Markham
Genetic Variation In Chrysopsis Floridana Small, The Endangered Florida Golden Aster, As Revealed By Random Amplification For Polymorphism Detection (Rapd), Laurie Lysle Walker Markham
USF Tampa Graduate Theses and Dissertations
Chrysopsis fioridana Small (Asteraceae) is a federally endangered plant endemic to the Tampa Bay area of west central Florida. It is confined to the sand pine scrub community, growing in open, sunny, and sandy areas or in disturbed areas at the edges of scrub. As a means ofassessing the genetic variability ofthis species, eight populations in Hillsborough County were compared with a seed stock collection housed at Bok Tower Gardens in Lake Wales using random amplification for polymorphism detection (RAPD). The objectives of this study were to (I) describe the overall genetic variation among and within populations and subpopulations of …
An Empirical Algorithm For Light Absorption By Ocean Water Based On Color, Zhongping Lee, Kendall L. Carder, R. G. Steward, T. G. Peacock, C. O. Davis, J. S. Patch
An Empirical Algorithm For Light Absorption By Ocean Water Based On Color, Zhongping Lee, Kendall L. Carder, R. G. Steward, T. G. Peacock, C. O. Davis, J. S. Patch
Marine Science Faculty Publications
Empirical algorithms for the total absorption coefficient and absorption coefficient by pigments for surface waters at 440 nm were developed by applying a quadratic formula that combines two spectral ratios of remote-sensing reflectance. For total absorption coefficients ranging from 0.02 to 2.0 m(-1), a goodness of fit was achieved between the measured and modeled data with a root-mean-square difference between the measured and modeled values for log10 scale (RMSDlog10) of 0.062 (15.3% for linear scale, number of samples N = 63), while RMSDlog10 is 0.111 (29.1% for linear scale, N = 126) for pigment absorption (ranging from 0.01 to 1.0 …
Detection Of The Fast Kelvin Wave Teleconnection Due To El Niño‐Southern Oscillation, Steven D. Meyers, Arne Melsom, Gary T. Mitchum, James J. O'Brien
Detection Of The Fast Kelvin Wave Teleconnection Due To El Niño‐Southern Oscillation, Steven D. Meyers, Arne Melsom, Gary T. Mitchum, James J. O'Brien
Marine Science Faculty Publications
Previous analyses of the ocean state along the western American coast have often indicated unexpectedly slow and limited propagation of coastally trapped Kelvin waves associated with the El Niño‐Southern Oscillation. In contrast, theoretical and numerical ocean models demonstrate that these Kelvin waves are a rapid and long‐range teleconnection between the low‐ and high‐latitude Pacific Ocean, strongly impacting both the surface coastal currents and nutrient upwelling. Sea level variations along the western coast of North America are reexamined under the assumption that tropically forced Kelvin waves are produced in bursts of several months duration. A cross‐correlation analysis, restricted to mid‐1982 to …
Ocean Color Chlorophyll Algorithms For Seawifs, John E. O'Reilly, Stephane Maritorena, B. Greg Mitchell, David A. Siegel, Kendall L. Carder, Sara A. Garver, Mati Kahru, Charles Mcclain
Ocean Color Chlorophyll Algorithms For Seawifs, John E. O'Reilly, Stephane Maritorena, B. Greg Mitchell, David A. Siegel, Kendall L. Carder, Sara A. Garver, Mati Kahru, Charles Mcclain
Marine Science Faculty Publications
A large data set containing coincident in situ chlorophyll and remote sensing reflectance measurements was used to evaluate the accuracy, precision, and suitability of a wide variety of ocean color chlorophyll algorithms for use by SeaWiFS (Sea-viewing Wide Field-of-view Sensor). The radiance-chlorophyll data were assembled from various sources during the SeaWiFS Bio-optical Algorithm Mini-Workshop (SeaBAM) and is composed of 919 stations encompassing chlorophyll concentrations between 0.019 and 32.79 mu g L-1. Most of the observations are from Case I nonpolar waters, and similar to 20 observations are from more turbid coastal waters. A variety of statistical and graphical criteria were …
The Influence Of Loop Current Perturbations On The Formation And Evolution Of Tortugas Eddies In The Southern Straits Of Florida, Paula S. Fratantoni, Thomas N. Lee, Guillermo P. Podesta, Frank E. Muller-Karger
The Influence Of Loop Current Perturbations On The Formation And Evolution Of Tortugas Eddies In The Southern Straits Of Florida, Paula S. Fratantoni, Thomas N. Lee, Guillermo P. Podesta, Frank E. Muller-Karger
Marine Science Faculty Publications
Large cyclonic eddies on the northern edge of the Florida Current are the dominant mesoscale features within the southern Straits of Florida. The most prominent of these features is a quasi-stationary eddy that forms near the Dry Tortugas. Our observations, compiled from 3 years of advanced very high resolution radiometer measurements in the Straits of Florida and Gulf of Mexico, demonstrate a strong relationship between the generation of anticyclonic rings from the Gulf of Mexico Loop Current and the evolution of Tortugas eddies within the southern Straits of Florida. In six cases, Tortugas eddies evolve from cyclonic frontal eddies which …
El Nino Southern Oscillation-Related Ocean-Atmosphere Coupling In The Western Equatorial Pacific, D. A. Mayer, Robert H. Weisberg
El Nino Southern Oscillation-Related Ocean-Atmosphere Coupling In The Western Equatorial Pacific, D. A. Mayer, Robert H. Weisberg
Marine Science Faculty Publications
Using 43 years of Comprehensive Ocean-Atmosphere Data: Set and related data for the period 1950-1992, an examination is made into the regional dependence of ocean-atmosphere coupling in relation to the El Nino-Southern Oscillation (ENSO). The cross correlation between sea surface temperature (SST) and sea level pressure (SLP) anomalies over the global tropics shows two patterns of significant negative correlation consistent with a local hydrostatic response of SLP to SST: (1) the eastern Pacific, where the correlation is symmetric about and largest on the equator, and (2) the western Pacific, where symmetric regions of-negative correlation are found off the equator, separated …
A Multicentury Stable Isotope Record From A New Caledonia Coral: Interannual And Decadal Sea Surface Temperature Variability In The Southwest Pacific Since 1657 Ad, Terrence M. Quinn, Thomas J. Crowley, Frederick W. Taylor, Christian Henin, Pascale Joannot, Yvan Join
A Multicentury Stable Isotope Record From A New Caledonia Coral: Interannual And Decadal Sea Surface Temperature Variability In The Southwest Pacific Since 1657 Ad, Terrence M. Quinn, Thomas J. Crowley, Frederick W. Taylor, Christian Henin, Pascale Joannot, Yvan Join
Marine Science Faculty Publications
A 335 year stable isotope record from a New Caledonia coral (22°S, 166°E) helps fill a large gap in historical climate reconstructions. Although the long‐term coral δ18O‐based sea surface temperature (SST) trend is one of warming, there are notable decadal fluctuations, especially in the early 18th and early 19th centuries. Mean annual SSTs between 1658 and 1900 are estimated to be ∼0.3°C lower than the 20th century average, with interdecadal excursions of 0.5°–0.8°C. Time series analyses of the coral isotope record reveals significant concentrations of variance in the El Niño band; an inderdecadal spectral peak is present, but its robustness …
The Tropical Ocean-Global Atmosphere Observing System: A Decade Of Progress, Michael J. Mcphaden, Antonio J. Busalacchi, Robert Cheney, Jean-Rene Donguy, Kenneth S. Gage, David Halpern, Ming Ji, Paul Julian, Gary Meyers, Gary T. Mitchum, Joel Picaut, Richard W. Reynolds, Neville Smith, Kensuke Takeuchi, Pearn P. Piller
The Tropical Ocean-Global Atmosphere Observing System: A Decade Of Progress, Michael J. Mcphaden, Antonio J. Busalacchi, Robert Cheney, Jean-Rene Donguy, Kenneth S. Gage, David Halpern, Ming Ji, Paul Julian, Gary Meyers, Gary T. Mitchum, Joel Picaut, Richard W. Reynolds, Neville Smith, Kensuke Takeuchi, Pearn P. Piller
Marine Science Faculty Publications
A major accomplishment of the recently completed Tropical Ocean-Global Atmosphere (TOGA) Program was the development of an ocean observing system to support seasonal-to-interannual climate studies. This paper reviews the scientific motivations for the development of that observing system, the technological advances that made it possible, and the scientific advances that resulted from. the availability of a significantly expanded observational database. A primary phenomenological focus of TOGA was interannual variability of the coupled ocean-atmosphere system associated with El Nino and the Southern Oscillation (ENSO). Prior to the start of TOGA, our understanding of the physical processes responsible for the ENSO cycle …
Upper Ocean Heat And Freshwater Advection In The Western Pacific Ocean, Michele Y. Morris, Dean H. Roemmich, Gary Meyers, Robert H. Weisberg
Upper Ocean Heat And Freshwater Advection In The Western Pacific Ocean, Michele Y. Morris, Dean H. Roemmich, Gary Meyers, Robert H. Weisberg
Marine Science Faculty Publications
Mean net surface heating of the Pacific Ocean shows areas of high heat gain in the eastern tropics and heat loss in the western midlatitudes. For steady state conditions, westward and poleward transport of heat is implied. Mean geostrophic and Ekman fluxes of heat and freshwater through the sides of a western tropical Pacific box bounded by World Ocean Circulation Experiment (WOCE) high‐resolution expendable bathythermograph (XBT) transects are presented. Water mass properties of currents transporting heat and freshwater through the enclosed region are seen to be modified in transit. Net transport convergences within the volume of water extending to 800 …
Midwater Fishes And Shrimps As Competitors And Resource Partitioning In Low Latitude Oligotrophic Ecosystems, Thomas L. Hopkins, Tracey T. Sutton
Midwater Fishes And Shrimps As Competitors And Resource Partitioning In Low Latitude Oligotrophic Ecosystems, Thomas L. Hopkins, Tracey T. Sutton
Marine Science Faculty Publications
Oligotrophic tropical-subtropical oceanic regimes constitute the largest and most ancient ecosystem on earth, with these enormous areas being characterized by high faunal diversity. The stability and age of the ecosystem have enabled the evolution of many similar species niches where there is considerable overlap in niche parameters such as food and space, resulting in high species packing, especially in the epi-and mesopelagic zones. Competition for limited resources undoubtedly exists and has been described by MacArthur (1972; Geographical ecology, Harper and Row, New York) as diffuse competition where each species is impacted by many other species sharing the environment. Most studies …
Florida Red Tides From A Scientific And Public Information Perspective, Kristen M. Kusek
Florida Red Tides From A Scientific And Public Information Perspective, Kristen M. Kusek
USF Tampa Graduate Theses and Dissertations
This thesis consists of a comprehensive historical review and evaluation of Florida red tide research and a multifaceted analysis of red tide coverage by the St. Petersburg Times from 1953 to 1997. Red tides caused by Gymnodinium breve along the Florida Gulf coast are riddled with complexity; scientists have been asking many of the same questions for nearly 50 years. Red tides also attract considerable media publicity. This thesis addressed the following: 1. What have scientists learned about Florida red tides since G. breve was identified in 1948?, and 2. How well was the issue covered by the newspaper media? …
Prophage Induction Of Indigenous Marine Lysogenic Bacteria By Environmental Pollutants, Pamela K. Cochran, Christine A. Kellogg, John H. Paul
Prophage Induction Of Indigenous Marine Lysogenic Bacteria By Environmental Pollutants, Pamela K. Cochran, Christine A. Kellogg, John H. Paul
Marine Science Faculty Publications
Lysogenic bacteria may be abundant components of bacterial assemblages in marine waters. The tremendous number of viruses found in estuarine and other eutrophic environments may be the result in part of induction of prophages. Mitomycin C is the inducing agent of choice for prophage induction; however this is not naturally found in the marine environment. We determined the capability of environmentally important pollutants to effect prophage induction in natural populations of marine bacteria. We investigated Aroclor 1248, a PCB mixture, bunker C fuel oil #6, and a pesticide mixture as inducing agents for natural bacterial communities from the Gulf of …
Observations Of Meridional Scale Frequency Dependence In The Coupled Tropical Ocean-Atmosphere System, Chunzai Z. Wang, Robert H. Weisberg
Observations Of Meridional Scale Frequency Dependence In The Coupled Tropical Ocean-Atmosphere System, Chunzai Z. Wang, Robert H. Weisberg
Marine Science Faculty Publications
It is generally observed in models of the coupled tropical ocean‐atmosphere system that the meridional scales for oscillations at interannual periods are larger than an oceanic equatorial Rossby radius of deformation. Using 9 years of the high‐resolution optimum interpolation sea surface temperature (SST) product of the National Oceanic and Atmospheric Administration (NOAA)/National Centers for Environmental Prediction (NCEP), analyses are made on the frequency dependence of the observed meridional scales, with emphasis on the latitudinal structures in the central Pacific at 140°W. On the relatively short intraseasonal and seasonal timescales the SST variations are found to occur over a meridional scale …
Tropical Instability Wave Energetics: Observations From The Tropical Instability Wave Experiment, L. Qiao, Robert H. Weisberg
Tropical Instability Wave Energetics: Observations From The Tropical Instability Wave Experiment, L. Qiao, Robert H. Weisberg
Marine Science Faculty Publications
Ocean velocity data from an array of subsurface moorings deployed from May 1990 to June 1991 during the Tropical Instability Wave Experiment are used to study the energetics of planetary waves in the vicinity of the equator at 140 degrees W. Such waves, observed from August to December 1990, were initiated by barotropic instability arising primarily from the cyclonic shear region of the South Equatorial Current and Equatorial Undercurrent just north of the equator. Subsequently, local barotropic production continued to maintain and modulate these tropical instability waves through a combination of cyclonic shear and meridional velocity component divergence just north …
The Influence Of Habitat Variation On Demography Of Blue Jays (Cyanociita Cristata) In South-Central Florida, Keith Allen Tarvin
The Influence Of Habitat Variation On Demography Of Blue Jays (Cyanociita Cristata) In South-Central Florida, Keith Allen Tarvin
USF Tampa Graduate Theses and Dissertations
Vertebrate populations rarely are homogeneous. Instead they exist as arrays of demographically variable subpopulations that are linked through dispersal. Variation in habitat quality is a major cause of demographic variability among subpopulations, but few studies have examined habitat-specific demography empirically. Here I present a detailed field study o f habitat-specific demography in Blue Jays (Cyanocitta cristata) that occupied a habitat mosaic landscape in south-central Florida. By measuring habitat-specific demographic parameters, including density, reproductive output, survival, and dispersal, I tested for the existence of population sources and sinks associated with different habitats, and the applicability ofa series ofhabitat selection models …
Measuring Heat Storage Changes In The Equatorial Pacific: A Comparison Between Topex Altimetry And Tropical Atmosphere-Ocean Buoys, D. P. Chambers, B. D. Tapley, R. H. Stewart
Measuring Heat Storage Changes In The Equatorial Pacific: A Comparison Between Topex Altimetry And Tropical Atmosphere-Ocean Buoys, D. P. Chambers, B. D. Tapley, R. H. Stewart
Marine Science Faculty Publications
Heat storage variations in the equatorial Pacific have been studied from December 1992 through February 1997, using sea level data from the TOPEX altimeter and temperatures measured by 42 tethered buoys that are part of the Tropical Ocean-Atmosphere (TAO) array. The TOPEX measurements are converted to heat storage anomalies using a coefficient determined from mean climatological values. For 30-day averages the two measurements agree well over most of the region, except for the southwestern quadrant of the warm pool and a small region of the north-central equatorial Pacific. In the southwestern quadrant the TOPEX measurements indicate a smaller long-term heating …
On The Use Of Tide Gauges To Determine Altimeter Drift, D. P. Chambers, J. C. Ries, C. K. Shum, B. D. Tapley
On The Use Of Tide Gauges To Determine Altimeter Drift, D. P. Chambers, J. C. Ries, C. K. Shum, B. D. Tapley
Marine Science Faculty Publications
TOPEX measurements of sea level variability have been compared to tide gauge measurements from 40 sites and to dynamic topography measurements computed from temperatures recorded at 23 Tropical Ocean-Global Atmosphere (TOGA)-Tropical Atmosphere-Ocean (TAO) buoys in the eastern Pacific and mean temperature-salinity profiles. Buoy data in the western Pacific were not used because of large long-term slopes in the data that appear to be due to interannual salinity variations. The relative drift between TOPEX and the two different in situ sets of data agree within 1 mm yr−1, with a weighted average of −2.6 mm yr−1 and an …
Seasonal Global Water Mass Budget And Mean Sea Level Variations, J. L. Chen, C. R. Wilson, D. P. Chambers, R. S. Nerem, B. D. Tapley
Seasonal Global Water Mass Budget And Mean Sea Level Variations, J. L. Chen, C. R. Wilson, D. P. Chambers, R. S. Nerem, B. D. Tapley
Marine Science Faculty Publications
Analysis of TOPEX/Poseidon satellite altimeter data indicates that the global mean sea level variation has a clear seasonal signal with an amplitude of about 2 to 3 mm, along with a long term drift. This seasonal variation is associated with mass redistribution within the global hydrological cycle plus steric thermal contributions. We investigate seasonal variations of water vapor in the atmosphere and water storage on land using both assimilated atmospheric models and climatological data, and to estimate the corresponding global mean sea level changes. The predicted seasonal global mean sea level changes are then compared with the seasonal variabilities observed …
Plate Tectonic Reconstructions Of The Juan Fernandez Microplate: Transformation From Internal Shear To Rigid Rotation, Robert T. Bird, David F. Naar, Roger L. Larson, Roger C. Searle, Christopher R. Scotese
Plate Tectonic Reconstructions Of The Juan Fernandez Microplate: Transformation From Internal Shear To Rigid Rotation, Robert T. Bird, David F. Naar, Roger L. Larson, Roger C. Searle, Christopher R. Scotese
Marine Science Faculty Publications
Side-scan sonar, swath bathymetry and magnetic anomaly date define a detailed, three-phase history of the Juan Fernandez microplate. The ∼6 m.y. history is presented in a series of discrete time steps to document the growth and reorganization of propagating spreading centers and structural feature, and microplate kinematic evolution. Prior to the microplate, the East Pacific Rise at the Pacific-Antarctic-Nazca triple junction was offset by a long transform fault zone, likely the fastest slipping transform on Earth at anomaly 3A time. The microplate originated from an intratransform setting between anomaly 3A (5.95 Ma) and anomaly 3 (5.24 Ma) time. Its early …