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Articles 61 - 82 of 82
Full-Text Articles in Entire DC Network
Comparative Analyses Of The Ultraviolet-B Flux Over The Continental United State Based On The Nasa Total Ozone Mapping Spectrometer Data And Usda Ground-Based Measurements, Zhiqiang Gao, Wei Gao, Ni-Bin Chang
Comparative Analyses Of The Ultraviolet-B Flux Over The Continental United State Based On The Nasa Total Ozone Mapping Spectrometer Data And Usda Ground-Based Measurements, Zhiqiang Gao, Wei Gao, Ni-Bin Chang
Faculty Bibliography 2010s
In recent years, the risk of health effects caused by the increased exposure to Ultraviolet-B (UVB) due to stratospheric ozone depletion has received wide attention. In the US, there are two ways to accurately measure the UVB. They include: 1) the National Aeronautical and Space Administration (NASA) Nimbus-7 total ozone mapping spectrometer (TOMS), and 2) the United State Department of Agriculture (USDA) ground-based network. This paper compares these two sensors' data for the ultraviolet index (UVI) nationally and regionally to support possible public health, agricultural, and ecological analyses in the future. The major findings of our study are: 1) although …
Carbon And Nitrogen Stable Isotope Turnover Rates And Diet-Tissue Discrimination In Florida Manatees (Trichechus Manatus Latirostris), Christy D. Alves-Stanley, Graham A. J. Worthy
Carbon And Nitrogen Stable Isotope Turnover Rates And Diet-Tissue Discrimination In Florida Manatees (Trichechus Manatus Latirostris), Christy D. Alves-Stanley, Graham A. J. Worthy
Faculty Bibliography 2000s
The Florida manatee (Trichechus manatus latirostris) is a herbivorous marine mammal that occupies freshwater, estuarine and marine habitats. Despite being considered endangered, relatively little is known about its feeding ecology. The present study expands on previous work on manatee feeding ecology by providing critical baseline parameters for accurate isotopic data interpretation. Stable carbon and nitrogen isotope ratios were examined over a period of more than 1 year in the epidermis of rescued Florida manatees that were transitioning from a diet of aquatic forage to terrestrial forage (lettuce). The mean half-life for (13)C turnover was 53 and 59 days for skin …
The Effects Of Urbanization On The Structure, Quality, And Diversity Of Cypress Plant Communities In Central Florida, Courtney Knickerbocker
The Effects Of Urbanization On The Structure, Quality, And Diversity Of Cypress Plant Communities In Central Florida, Courtney Knickerbocker
Electronic Theses and Dissertations
The integrity of wetland ecosystems is largely determined by hydrological functionality, degree of connectivity to like ecosystems, and permeability to external influence. Land use changes in upland areas adjacent to wetland ecosystems may influence hydrology and connectivity while introducing novel biotic and abiotic materials. There is an increasing trend toward the use of remote assessment techniques to determine the degree of impact of external influences on adjacent wetlands. Remote assessment and predictive capabilities are provided by indices such as the Landscape Development Intensity Index (LDI) (Brown and Vivas 2005) which may be beneficial in determining site condition, and which have …
Using Stable Isotopes To Assess Population Structure And Feeding Ecology Of North Pacific Humpback Whales (Megaptera Novaeangliae), Briana Witteveen
Using Stable Isotopes To Assess Population Structure And Feeding Ecology Of North Pacific Humpback Whales (Megaptera Novaeangliae), Briana Witteveen
Electronic Theses and Dissertations
The North Pacific humpback whale (Megaptera novaeangliae) is a wide-ranging baleen whale species with a complex life history and population structure. As seasonal migrants, humpback whales are known to inhabit cooler, high-latitude waters when foraging and low-latitudes for mating and calving. Beyond this general migratory pattern, a number of demographic characteristics including, abundance, distribution, seasonal occurrence, and prey preferences remain unknown or poorly described. A complete understanding of humpback whale ecology is therefore lacking. Many methods used to explore these aspects of cetacean ecology are either prohibitively expensive or limited in the scope of what can be learned from their …
Social Pathogenic Sources Of Poor Community Health, Hayden Smith
Social Pathogenic Sources Of Poor Community Health, Hayden Smith
Electronic Theses and Dissertations
The United States currently provides a health care system that is neither efficient nor equitable. Despite outspending the world on health care, over three-fourths of developed countries produce better health outcomes (Auerbach et al., 2000). Simultaneously, the "Ecological School of Thought" has documented the large impact that social, economic, and environmental circumstances play in health outcomes. Unfortunately, these 'ecological" studies are frequently conducted without theoretical justification, and rely solely on a cross-sectional research design and a myriad of unrelated variables. This study represents an important step towards the development of a true theory of "ecology". More specifically, we argue that …
Testing Deterrence Theory With Offenders: Assessing The Effects Of Personal And Vicarious Experience With Punishment And Punishm, Alicia Sitren
Testing Deterrence Theory With Offenders: Assessing The Effects Of Personal And Vicarious Experience With Punishment And Punishm, Alicia Sitren
Electronic Theses and Dissertations
Stafford and Warr (1993) reconceptualized general and specific deterrence into a single theory in which individuals' propensities to engage in criminal behavior are based on some combination of personal experiences with being punished and avoiding punishment and vicarious (or indirect) experiences with being punished and avoiding punishment. The researchers make a substantial contribution to the deterrence literature by accounting for the effect of punishment avoidance when assessing deterrence theory. Despite the theoretical appeal of this restatement, few studies have tested its empirical merit. The current study tests the applicability of Stafford and Warr's model but also addresses several key limitations …
Individual Identification Of Polar Bears By Whisker Spot Patterns, Carlos Anderson
Individual Identification Of Polar Bears By Whisker Spot Patterns, Carlos Anderson
Electronic Theses and Dissertations
Many types of ecological studies require identification of individual animals. I developed and evaluated an automated identification system for polar bears (Ursus maritimus) based on their whisker spot patterns. First, I measured the reliability of using whisker spot patterns for identification from polar bear photographs taken in western Hudson Bay. This analysis involved estimating the complexity of each whisker spot pattern in terms of its information content. I found that 98% of patterns contained enough information to be reliable, and this result varied little among three different observers. Based on these results, I implemented a computer-aided identification system for polar …
Stabel Isotope Turnover Rates And Diet-Tissue Discrimination In The Skin Of West Indian Manatees: Implcations For Evaluating Their Feeding Ecology And Habitat Use, Christy Alves
Electronic Theses and Dissertations
The West Indian manatee (Trichechus manatus) is an herbivorous marine mammal that occupies freshwater, estuarine, and marine habitats. Despite being considered endangered, relatively little is known about the feeding ecology of either of the two recognized subspecies, the Florida manatee (T.m. latirostris) and Caribbean or Antillean manatee (T.m. manatus). A better understanding of their respective feeding preferences and habitat use is essential to establish criteria on which conservation plans can be based. The present study expands on previous work on manatee feeding ecology by both assessing the application of stable isotope analysis to manatee tissue and providing critical baseline parameters …
Effects Of Isolation On Metapopulation Dynamics In Small-World Networks, Alaina Brooke Bernard
Effects Of Isolation On Metapopulation Dynamics In Small-World Networks, Alaina Brooke Bernard
Electronic Theses and Dissertations
Simulation models are valuable for making predictions that may be tested in natural systems and for understanding observed patterns. The simulation model developed for this thesis evaluates the effects of spatial network architecture, including organism dispersal patterns and isolation of habitats, on metapopulations. Two fields were merged throughout this project: metapopulation biology and small-world network theory. Small-world networks are characterized in their extremes as scale-free or single-scale. These models potentially simulate the networks of habitats and corridors in which metapopulations operate. Small-world network theory has been used to describe systems as diverse as rivers, the world-wide-web, and protein interactions, but …
Responses Of Small Rodents To Restoration And Management Techniques Of Florida Scrub At Cape Canaveral Air Force Station, Florid, Alexis Suazo
Electronic Theses and Dissertations
Proper habitat management is essential for the survival and reproduction of species, especially those listed under state or federal laws as endangered, threatened or of special concern, and those with small local populations. Land managers use a combination of mechanical cutting and prescribed burning to manage and restore degraded scrub habitat in east central Florida. This approach improves habitat for the endangered Florida scrub-jay (Aphelocoma coerulescens), but little is known about its effects on other taxa, especially the threatened southeastern beach mouse (Peromyscus polionotus niveiventris). This single species approach may not be beneficial to other taxa, and mechanical cutting and …
Multiple Source Pools And Dispersal Barriers For Galapagos Plant Species Distribution, J. Alan Yeakley, John F. Weishampel
Multiple Source Pools And Dispersal Barriers For Galapagos Plant Species Distribution, J. Alan Yeakley, John F. Weishampel
Faculty Bibliography 2000s
We reexamined geographic factors explaining the number of plant species on islands in the Galapagos Archipelago. We hypothesized that plant species richness (S) was related to the number of source pools and that plant species dispersal preferentially followed direct, oceanic pathways. To test different dispersal pathways from multiple source pools, the total number of islands within a given dispersal radius (i) was posed as the sum of the number of line-of-sight islands (C-i) and of the number of islands without line-of-sight connection (B-i). In partial regression analyses, controlling for nearest island area (A(2)) and for recipient island elevation (E) and …
University Of Central Florida 1985 Self Study Southern Association Of Colleges And Schools : Department Of Chemistry Self Study Report, University Of Central Florida. Department Of Chemistry
University Of Central Florida 1985 Self Study Southern Association Of Colleges And Schools : Department Of Chemistry Self Study Report, University Of Central Florida. Department Of Chemistry
Self-Studies
University of Central Florida College of Arts and Sciences, Department of Chemistry, self-study report for the Southern Association of Colleges and Schools, 1985.
Reproductive Biology Of Thamnophis Sauritus Sackenii (Kennicott) (Reptilia:Serpentes:Colubridae) From East-Central Florida, Steven. Myers
Reproductive Biology Of Thamnophis Sauritus Sackenii (Kennicott) (Reptilia:Serpentes:Colubridae) From East-Central Florida, Steven. Myers
Retrospective Theses and Dissertations
Peninsula ribbon snakes, Thamnophis sauritus sackenii, were collected for 14 months. Of 90 individuals collected and examined, 42 were females, 29 were males, and 19 were neonates. Females had a larger body length than did males. The smallest, sexually mature female had a snout-vent length of 428 mm. Mating occurred from March through May. Parturition occurred from June through October. Vitellogenesis began in spring and ovulation occurred between April and May. Spermatogenic activity occurred from August through December and testes were regressed during other months.
Differences Associated With Mating Type Alleles In Myxomycetes, Robert M. Queen
Differences Associated With Mating Type Alleles In Myxomycetes, Robert M. Queen
Retrospective Theses and Dissertations
Differences associated with the mating type alleles of Didymium iridis and Physarum polycephalum were examined with fluorescent antibody and sodium dodecyl sulfate-polyacrylamide gel electrophoresis. Heteroabsorption of each anti-myxamoebal serum followed by testing serum activity using immunofluorescence showed there is no strain-specific activity in any of the anti-myxamoebal sera, but the sera was shown, to be genera specific. Intergeneric differences and similarities were shown in the electrophoretic patterns of the myxamoebal protein extracts from P. polycephalum, D. iridis, and Dictyostelium discoideum when compared. Intraspecific differences were noted in D. iridis.
College Of Arts And Sciences Summary Of Research And Creative Activities, July 1, 1981 To June 30, 1982, University Of Central Florida. College Of Arts And Sciences
College Of Arts And Sciences Summary Of Research And Creative Activities, July 1, 1981 To June 30, 1982, University Of Central Florida. College Of Arts And Sciences
Research Activities & Annual Reports
Summary of research and creative activities of the College of Arts and Sciences at the University of Central Florida, July 1, 1981-June 30, 1982.
The Effects Of Grass Carp (Ctenopharyngodon Idella Val.) Upon The Submersed Macrophytic Vegetation In Central Florida Lakes, Winston K. Borkowski
The Effects Of Grass Carp (Ctenopharyngodon Idella Val.) Upon The Submersed Macrophytic Vegetation In Central Florida Lakes, Winston K. Borkowski
Retrospective Theses and Dissertations
The biomass of the submersed macrophytic vegetation in four hydrilla (Hydrilla verticillata Royle) infested lakes in central Florida was monitored for one year. Lake Orienta and Little Lake Fairview received 2,320 and 960 grass carp, respectively, while Clear Lake and Lake Mann did not receive grass carp. Hydrilla was eliminated in Lake Orienta within six months of stocking; the lake was stocked at 19 grass carp/mt hydrilla (45 fish/ha). Hydrilla was not eliminated from Little Lake Fairview which contained 9 grass carp/mt hydrilla (30 fish/ha). The growth of hydrilla was restricted in Little Lake Fairview which produced 0.380 mt hydrilla, …
Florida Technological University College Of Natural Sciences Research Activities, July 1, 1977-June 30, 1978, Florida Technological University. College Of Natural Sciences
Florida Technological University College Of Natural Sciences Research Activities, July 1, 1977-June 30, 1978, Florida Technological University. College Of Natural Sciences
Research Activities & Annual Reports
Florida Technological University, College of Natural Sciences, research activities including funded research, non-sponsored research projects, presentations of professional papers, and publications for the year July 1, 1977-June 30, 1978.
Numerical Taxonomy Of Anaerobic Bacteria Isolated From Ground Water Of A Sanitary Landfill, Kenneth J. Curry
Numerical Taxonomy Of Anaerobic Bacteria Isolated From Ground Water Of A Sanitary Landfill, Kenneth J. Curry
Retrospective Theses and Dissertations
Section I: Facultative and obligatory anaerobic bacteria were isolated from the ground water of a sanitary landfill characterized by sandy soil and a periodically high water table. Isolates were examined for 63 characteristics and subject to numerical analysis. Eight clusters were established and correlations with conventional taxonomy were made. The Bacteriodaceae were found to be the dominant group of organisms by the methods employed. The anaerobic population was observed to decrease as the period of seasonal rainfall ended. At the same time, gram positive anaerobes were largely replaced with gram negative ones. Leaching between sampling sites (wells) made correlations between …
Florida Technological University College Of Natural Sciences Research Activities, July 1, 1973-June 30, 1974, Florida Technological University. College Of Natural Sciences
Florida Technological University College Of Natural Sciences Research Activities, July 1, 1973-June 30, 1974, Florida Technological University. College Of Natural Sciences
Research Activities & Annual Reports
Florida Technological University, College of Natural Sciences, research activities including funded research, non-sponsored research projects, and presentations of professional papers for the year July 1, 1973-June 30, 1974, doctoral dissertations completed during 1973-74, and publications from 1968-74.
Central Florida Future, Vol. 04 No. 24, April 21, 1972, Florida Technological University
Central Florida Future, Vol. 04 No. 24, April 21, 1972, Florida Technological University
Central Florida Future
Candidate's status unclear- SG [Student Government], Dean of Men disagree on rules; WFTU-TV's open forum with SG candidates (photo); Engineering students seeking 'clean' car; Forest study funds approved by NSF; Campus streets receive space-related designations; CofC [The Greater Orlando Chamber of Commerce] members briefed on environmental projects; FuTUre's Friday Girl: [Linda Solis]; CBS's Kalb saw progress, restraint in China (with photo); Future Sports News: Netters thump Tampa, raise record to 8-6; Schunck practices what he preaches (with photo).
Central Florida Future, Vol. 03 No. 20, March 12, 1971, Florida Technological University
Central Florida Future, Vol. 03 No. 20, March 12, 1971, Florida Technological University
Central Florida Future
Top banana race ripens, six SG Pres. hopefuls planning campaigns; FTU will award graduate degrees for first time; FTU's Circle-K sponsors 'Pre-Earth Day' activity (with photo); FuTUre Editorials: How important is education? FuTUre's Friday Girl: Lyn Ferris; FTU Foundation gets 133 acres; Senate hears debate over petition issue; Africa presented by Hallet (with photo); Daring Dee's dash for dimes (with photo); [Bill Day and his cartoon, photos]; FTU Federal Credit Union is ready for business (with photo); Future Sports News: FuTUre hails Tech sports: A close-up look at some coaches (with photos of Jack Pantelias, Gerald Gergley and John Ellis); …
Sandspur, Vol. 74 No. 14, February 23, 1968, Rollins College
Sandspur, Vol. 74 No. 14, February 23, 1968, Rollins College
The Rollins Sandspur
Rollins College student newspaper, written by the students and published at Rollins College. The Sandspur started as a literary journal.