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- Title
- The ascidian Styela plicata as a potential bioremediator of bacterial and algal contamination of marine estuarine waters.
- Creator
- Draughon, Lisa D., Charles E. Schmidt College of Science, Department of Biological Sciences
- Abstract/Description
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The tunicate Styela plicata (Ascidiacea) was investigated for its potential use in bioremediation of bacteria and microalgae blooms from estuarine waters. Salinity tolerances, filtration rate, substrate selection, and effects on digested bacteria and ichthyofaunal communities were examined. If acclimated slowly, Styela can be placed in salinities as low as 24 parts per thousand (ppt) before increased fatalities result. An immediate decrease in salinity from 32 ppt to 20 ppt was not...
Show moreThe tunicate Styela plicata (Ascidiacea) was investigated for its potential use in bioremediation of bacteria and microalgae blooms from estuarine waters. Salinity tolerances, filtration rate, substrate selection, and effects on digested bacteria and ichthyofaunal communities were examined. If acclimated slowly, Styela can be placed in salinities as low as 24 parts per thousand (ppt) before increased fatalities result. An immediate decrease in salinity from 32 ppt to 20 ppt was not detrimental at short term exposure (four days). One average-sized (~40g) Styela, exposed to 105 and 106 bacteria or microalgae mL-1, can filter as much as 4.7 L hr-1 and 3.3 L hr-1, respectively. Individual tunicate filtration rates varied from hour to hour, independent of organism size, indicating that filtration rates for this species would be better reported on a population basis rather than on an individual weight or size basis. Bacterial viability in tunicate feces was assessed by ATP analysis. Bacteria were found to be non-viable after passage through the tunicate digestive tract. Filtration of eggs or larvae of recreationally or commercially important fish is of concern. The smallest eggs (~0.6mm) reported in the Indian River Lagoon belong to Cynoscion nebulosus (spotted seatrout) and Bairdiella chrysoura (silver perch). Over the course of two hours, 72.5% of 0.5 mm glass beads (simulated fish eggs) were initially retained, but many were later expelled by the tunicates. For 1.0 mm beads, 49.4% were initially retained and for 2.0 mm beads, 43.5% were initially retained. Neither the size of the oral siphon nor the size of the overall animal was correlated to bead retention. Substrate selection was investigated using the tunicate Phallusia nigra., Newly hatched larvae preferred settling on wood (53.7%), as compared to polyethylene (30.9%), high-density polyethylene (13.0%), and polyvinyl chloride (2.4%). Overall, results of this study indicate S. plicata is very effective at removing bacteria and microalgae from estuarine waters. However, further testing is warranted regarding the unwanted removal of fish eggs and larvae before utilization of S. plicata for bioremedial purposes.
Show less - Date Issued
- 2010
- PURL
- http://purl.flvc.org/FAU/1927312
- Subject Headings
- Marine bioremediation, Estuarine ecology, Water quality management, Water quality biological assessment
- Format
- Document (PDF)
- Title
- Attachment in preadolescence: consequence or cause of children's perceptions of parenting ?.
- Creator
- Menon, Meenakshi, Florida Atlantic University, Charles E. Schmidt College of Science, Department of Psychology
- Abstract/Description
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This one-year longitudinal study was designed to illuminate the direction of the causal arrow between children's perceptions of their mother's behavior and children's attachment style during a period of development that has been relatively neglected in research on attachment - preadolescence. The possibility that children's behavior problems moderate the influence of perceived parenting on attachment, or of attachment on perceived parenting, was also investigated. Participants were an...
Show moreThis one-year longitudinal study was designed to illuminate the direction of the causal arrow between children's perceptions of their mother's behavior and children's attachment style during a period of development that has been relatively neglected in research on attachment - preadolescence. The possibility that children's behavior problems moderate the influence of perceived parenting on attachment, or of attachment on perceived parenting, was also investigated. Participants were an ethnically diverse sample of 407 children (213 girls, 194 boys) who were in the fourth grade at initial testing (M age = 11 years 1 month). Measures included children's perceptions of five maternal behaviors (harassment, overprotectiveness, monitoring, affectionate contact, and reliable support), peer reports of children's behavior problems (internalizing and externalizing), and children's self-perceived attachment styles (preoccupied and avoidant). Contrary to a traditional attachment perspective, there was limited evidence that perceptions of parenting led to change in children's attachment styles. Though children with internalizing problems who perceived their mother as harassing developed preoccupied attachment over time, and children with externalizing problems who perceived their mother as v overprotective developed avoidant attachment over time. However, there was considerable support for the reverse causal hypothesis that children's attachment style influences how they perceive their mother: Preoccupied attachment predicted increasingly favorable perceptions of maternal behavior over time (reduced harassment and increased monitoring), whereas avoidant attachment predicted increasingly unfavorable perceptions of the mother over time (increased harassment, reduced monitoring, reduced affectionate contact, and reduced reliable support). Children's behavior problems moderated a few of these relations., Overall, results support a "child effects" interpretation of the links between perceived parenting and attachment styles during preadolescence.
Show less - Date Issued
- 2008
- PURL
- http://purl.flvc.org/FAU/58007
- Subject Headings
- Parent and teenager, Attachment behavior in adolescence, Child rearing, Parenting, Psychological aspects
- Format
- Document (PDF)
- Title
- Attitudes and perspectives about backyard food gardening: a case study in South Florida.
- Creator
- Zahina-Ramos, John G., Charles E. Schmidt College of Science, Department of Geosciences
- Abstract/Description
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As cities grew throughout the past century, the availability of locally grown food declined, mostly because urban expansion occurred at the expense of adjacent agricultural land. As a result, city dwellers turned to commercial food market systems that import food from distant production areas. Private greenspace, which is one of the largest land cover types in cities, offers the potential for substantial agricultural production. Because urban food production on private land, such as backyards...
Show moreAs cities grew throughout the past century, the availability of locally grown food declined, mostly because urban expansion occurred at the expense of adjacent agricultural land. As a result, city dwellers turned to commercial food market systems that import food from distant production areas. Private greenspace, which is one of the largest land cover types in cities, offers the potential for substantial agricultural production. Because urban food production on private land, such as backyards, requires the willing participation of landowners, resident's feelings about and experience with food growing are important to understand. The demographic groups that were most likely to food garden were those in long-term relationships, higher income brackets, those with college education and residents over 50 years old. Incentives and programs focused on producing more from existing gardens may be most appropriate for people in these demographic groups, while other groups will most require basic food growing information. Study participants highly valued intangible benefits of food gardening (e.g., relaxation, feelings of happiness and satisfaction), often more than the provision of food. Most barriers and problems with backyard food growing, such as a lack of space and the need for gardening information, were similar for those who food garden and those who do not. Results from this study indicate that traditional agricultural incentives and perspectives must be rethought if they are to be applied in urban settings. By creating incentives and initiatives that reflect the needs and challenges faced by urban growers, urban agriculture will become an integrated part of the community, improving food quantity and quality while enriching residents' lives.
Show less - Date Issued
- 2013
- PURL
- http://purl.flvc.org/fcla/dt/3361258
- Subject Headings
- Backyard gardens, Food chains (Ecology), Garden ecology, Green movement, Sustainable development
- Format
- Document (PDF)
- Title
- Attitudes towards multilanguage use among Latino and Asian immigrants in the United States.
- Creator
- Le, Cuong T., Charles E. Schmidt College of Science, Department of Psychology
- Abstract/Description
-
This study was designed to measure the relation of education and ethnic identity to attitudes towards bilingualism in two different ethnic groups, Asian and Latinos in the United States. In order to do this, an instrument was developed to measure attitudes towards bilingualism. No significant relations were found among education or ethnic identity and attitudes towards bilingualism in either group, but analyses revealed several other significant relationships. The two subscales of ethnic...
Show moreThis study was designed to measure the relation of education and ethnic identity to attitudes towards bilingualism in two different ethnic groups, Asian and Latinos in the United States. In order to do this, an instrument was developed to measure attitudes towards bilingualism. No significant relations were found among education or ethnic identity and attitudes towards bilingualism in either group, but analyses revealed several other significant relationships. The two subscales of ethnic identity, MEIM-R Commitment and Exploration, were related to each other both within Asian and Latino groups and in all participants combined. In the combined sample, education levels of participants' mothers was correlated with the MEIM-R subscale of Exploration. In addition, participants with a Bachelors Degree or above were found to have significantly higher ethnic identity levels of MEIM-R Commitment than participants with an Associates Degree or below. Participants with mothers who possess a Bachelors Degree or above were found to have significantly higher ethnic identity levels of MEIM-R Exploration than participants with mothers who possess an Associates Degree or below. Finally, Asian participants were found to have lower levels of MEIM-R Commitment when compared to Latino participants.
Show less - Date Issued
- 2013
- PURL
- http://purl.flvc.org/fcla/dt/3360953
- Subject Headings
- Second language acquisition, Bilingualism in children, Education, Bilingual, Social aspects, Group identity, Languages in contact, English language, Study and teaching, Foreign speakers, Ethnic relations
- Format
- Document (PDF)
- Title
- Foreclosure effects: the changing landscape and those left behind in Broward County, Florida.
- Creator
- Shaw, Cindy M., Charles E. Schmidt College of Science, Department of Geosciences
- Abstract/Description
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The recent financial crisis which has beset the United States has made itself felt in a number of ways, not the least of which has been its adverse effect on the housing market. As foreclosure percentages accelerated, increasing numbers of properties across the country became empty and abandoned, leaving a visible imprint of deterioration in neighborhoods that were significantly affected. Initial GIS analysis of both foreclosed and non-foreclosed residential land in Broward County Florida was...
Show moreThe recent financial crisis which has beset the United States has made itself felt in a number of ways, not the least of which has been its adverse effect on the housing market. As foreclosure percentages accelerated, increasing numbers of properties across the country became empty and abandoned, leaving a visible imprint of deterioration in neighborhoods that were significantly affected. Initial GIS analysis of both foreclosed and non-foreclosed residential land in Broward County Florida was conducted, showing that there is a discernible spectral difference in the lawn space of these two types of properties, with foreclosed properties exhibiting more brownness, or loss of green space. In order to evaluate whether or not this visible deterioration has had an effect on residents left behind in areas of foreclosure and their own habits, 950 mail-in surveys were distributed throughout 19 different census tracts in Broward County, inquiring about demographics, surrounding foreclosures, degrees of concern for home value and appearance, and changes in lawn maintenance since the foreclosure crisis along with reasons for such change if such exists. Data received from respondents was then analyzed in order to identify any attributes or correlations which might contribute to further neighborhood change, and how any of these factors might be affecting attitudes or perceptions of those left behind, as well as their lawn maintenance habits.
Show less - Date Issued
- 2013
- PURL
- http://purl.flvc.org/fcla/dt/3361063
- Subject Headings
- Financial crises, Foreclosure, Community development, Urban, Land use, Urban, Economic conditions
- Format
- Document (PDF)
- Title
- Hatchling sex ratios and nest temperature-sex ratio response of three South Florida marine turtle species (Caretta caretta L., Chelona mydas L., and Dermochelys coriacea V.).
- Creator
- Rogers, Micah Marie., Charles E. Schmidt College of Science, Department of Biological Sciences
- Abstract/Description
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South Florida's loggerhead (Caretta caretta), green (Chelonia mydas) and leatherback (Dermochelys coriacea) sea turtles hatchling have environmentally determined sex. The in situ nest mean hatchling sex ratios (SR) were highly female-biased : loggerhead F=0.89) and green turtle F=0.81; leatherback's SR was nearly balanced (0.55F). Nest temperatures and SRs differed between leatherbacks and loggerhead and green turtles. The latter two did not differ. The loggerhead response parameters were...
Show moreSouth Florida's loggerhead (Caretta caretta), green (Chelonia mydas) and leatherback (Dermochelys coriacea) sea turtles hatchling have environmentally determined sex. The in situ nest mean hatchling sex ratios (SR) were highly female-biased : loggerhead F=0.89) and green turtle F=0.81; leatherback's SR was nearly balanced (0.55F). Nest temperatures and SRs differed between leatherbacks and loggerhead and green turtles. The latter two did not differ. The loggerhead response parameters were estimated within biological limitations by both 50-65% of incubation and mean middle 1/3 temperature. The maximum middle 1/3 temperature was the best-fit predictor for green turtles. No best-fit sex ratio-temperature response could be identified for leatherbacks. Clutches incubating under natural conditions can vary greatly in SR ; TRT differences may account for differences among species' sex ratios.
Show less - Date Issued
- 2013
- PURL
- http://purl.flvc.org/fcla/dt/3361062
- Subject Headings
- Sex ratio, Sex determination, Genetic, Sea turtles, Nests, Sea turtles, Embryology, Loggerhead turtle, Nests, Loggerhead turtle, Effect of temperature on
- Format
- Document (PDF)
- Title
- Mechanisms of protection against ischemic damage in the heart.
- Creator
- Moench, Ian, Charles E. Schmidt College of Science, Department of Biological Sciences
- Abstract/Description
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Heart disease including ischemic heart disease is the highest contributor to death and morbidity in the western world. The studies presented were conducted to determine possible pathways of protection of the heart against ischemia/reperfusion. We employed adenovirus mediated over-expression of Methionine sulfoxide reductase A (MsrA) in primary neonatal rat cardiac myocytes to determine the effect of this enzyme in protecting against hypoxia/reoxygenation. Cells transfected with MsrA encoding...
Show moreHeart disease including ischemic heart disease is the highest contributor to death and morbidity in the western world. The studies presented were conducted to determine possible pathways of protection of the heart against ischemia/reperfusion. We employed adenovirus mediated over-expression of Methionine sulfoxide reductase A (MsrA) in primary neonatal rat cardiac myocytes to determine the effect of this enzyme in protecting against hypoxia/reoxygenation. Cells transfected with MsrA encoding adenovirus and subjected to hypoxia/reoxygenation exhibited a 45% decrease in apoptosis as compared to controls. Likewise total cell death as determined by levels of Lactate Dehydrogenase (LDH) release was dramatically decreased by MsrA overexpression. The initial hypothesis that led to our testing sulindac was based on the fact that the S epimer of sulindac was a substrate for MsrA and that this compound might function as a catalytic anti-oxidant based on a reaction cycle that involved reductio n to sulindac sulfide followed by oxidation back to sulindac. To test this we examined the protective effect of sulindac in hypoxia re-oxygenation in both cardiac myocytes in culture and using a Langendorff model of myocardial ischemia. Using this model of myocardial ischemia we showed that pre-incubation of hearts with sulindac, or the S and R epimers of sulindac resulted in protection against cell death. We present several lines of evidence that the protective effect of sulindac is not dependent on the Msr enzyme system nor does it involve the well established role of sulindac as a Cyclooxygenase (COX) inhibitor. Numerous signaling pathways have been implicated in myocardial protective mechanisms, many of which require fluctuations in ROS levels as initiators or mediators., Sulindac shows very good potential as a preconditioning agent that could induce tissue protection against oxidative damage.Blocking of preconditioning pathways by administration of the PKC blocker chelerythine abrogated the ischemic protection afforded by sulindac. Secondly, an end-effector of preconditioning, inducible nitric oxide synthase (iNOS),was found to be induced by greater than 5 fold after 48 h prior feeding sulindac.
Show less - Date Issued
- 2008
- PURL
- http://purl.flvc.org/FAU/186291
- Subject Headings
- Biochemical markers, Diagnostic use, Cardiovascular system, Diseases, Diagnosis, Heart, Diseases, Molecular aspects, Medical care, Quality control, Coronary heart disease, Prevention, Apoptosis, Myocardial infarction, Prevention
- Format
- Document (PDF)
- Title
- Statistical correlation between economic activity and DMSP-OLS night light images in Florida.
- Creator
- Forbes, Dolores J., Charles E. Schmidt College of Science, Department of Geosciences
- Abstract/Description
-
The Defense Meteorological Satellite Program (DMSP) Optical Line Scan (OLS) instruments collect data from an altitude of approximately 830km above the surface of the Earth. The night light data from these instruments has been shown to correlate by lit area with national level Gross Domestic Product (GDP) and to correlate with GDP at the State level by total radiance value. Very strong correlation is found between the night light data at a new, larger scale, the Metropolitan Statistical Area ...
Show moreThe Defense Meteorological Satellite Program (DMSP) Optical Line Scan (OLS) instruments collect data from an altitude of approximately 830km above the surface of the Earth. The night light data from these instruments has been shown to correlate by lit area with national level Gross Domestic Product (GDP) and to correlate with GDP at the State level by total radiance value. Very strong correlation is found between the night light data at a new, larger scale, the Metropolitan Statistical Area (MSA) within the state of Florida. Additional statistical analysis was performed to determine which industries within each MSA explain the greatest amount of variance in the night light data. Industrial variables exhibited strong multi-collinearity. It is therefore impossible to determine which industries explain the greatest variance in the night light image data.
Show less - Date Issued
- 2011
- PURL
- http://purl.flvc.org/FAU/3175019
- Subject Headings
- Earth, Rendering (Computer graphics), Urban ecology (Sociology), Sustainable development
- Format
- Document (PDF)
- Title
- Women's rape avoidance: an evolutionary psychological perspective.
- Creator
- McKibbin, William F., Charles E. Schmidt College of Science, Department of Psychology
- Abstract/Description
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Women have recurrently faced the adaptive problem of rape over evolutionary history. Little research has investigated the potential evolved psychological mechanisms for rape avoidance that women may possess. Here I review evolutionary perspectives on rape avoidance. I follow this review with the results of two studies conducted to design a measure of women's rape avoidance, known as the Rape Avoidance Inventory (RAI). Study 1A included 99 women who self-reported acts they do or might do...
Show moreWomen have recurrently faced the adaptive problem of rape over evolutionary history. Little research has investigated the potential evolved psychological mechanisms for rape avoidance that women may possess. Here I review evolutionary perspectives on rape avoidance. I follow this review with the results of two studies conducted to design a measure of women's rape avoidance, known as the Rape Avoidance Inventory (RAI). Study 1A included 99 women who self-reported acts they do or might do specifically to avoid being raped. Study 1B included 144 women who filled out a preliminary inventory of rape avoidance behaviors. I used their responses to construct the RAI. In Study 3, I develop and test a number of hypotheses derived from evolutionary psychological theory, using data derived from the sample of women in Study 1B. I conclude by discussing limitations and possible future directions for rape avoidance research.
Show less - Date Issued
- 2010
- PURL
- http://purl.flvc.org/FAU/1927315
- Subject Headings
- Rape, Psychological aspects, Sex differences (Psychology), Women, Violence against, Rape victims, Public opinion, Man-woman relationships, Evolutionary psychology
- Format
- Document (PDF)