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Title: Hypoxia-induced physiological changes in two mangrove swamp fishes: sheepshead minnow, Cyprinodon variegatus Lacepede and sailfin molly, Poecilia latipinna (Lesueur).
Creator: Peterson, Mark S., Harbor Branch Oceanographic Institute
Date Issued: 1990
PURL: http://purl.flvc.org/FCLA/DT/3353852
Subject Headings: Mangrove swamps, Hypoxia (Water), Ecophysiology
Format: Document (PDF)

Title: Comparative physiological ecology of centrarchids in hyposaline environments.
Creator: Peterson, Mark S., Harbor Branch Oceanographic Institute
Date Issued: 1988
PURL: http://purl.flvc.org/FCLA/DT/3342225
Subject Headings: Centrarchidae, Physiological ecology, Ecophysiology, Salinity, Physiology, Comparative
Format: Document (PDF)

Title: Physiological responses of transplanted populations of Sargussum pteropleuron Grunow in Florida.
Creator: Dawes, Clinton J., Bird, Kimon T., Hanisak, M. Dennis
Date Issued: 1988
PURL: http://purl.flvc.org/FCLA/DT/3353810
Subject Headings: Sargassum, Brown algae, Transplanting (Plant culture), Florida, Plant ecophysiology
Format: Document (PDF)

Title: The multiple stress gradient hypothesis: expansion of the revised stress gradient hypothesis using a mangrove and salt marsh study system.
Creator: Coldren, Glenn A., Proffitt, C. Edward, Charles E. Schmidt College of Science, Department of Biological Sciences
Abstract/Description: Plant interactions (e.g., competition, facilitation) are critical drivers in community development and structure. The Stress Gradient Hypothesis (SGH) provides a predictive framework for how plant species interactions vary inversely across an environmental stress gradient, predicting that facilitation is stronger with increasing levels of stress. The SGH has been supported in numerous ecosystems and across a variety of stress gradients, but recent research has demonstrated contradictory...
Show morePlant interactions (e.g., competition, facilitation) are critical drivers in community development and structure. The Stress Gradient Hypothesis (SGH) provides a predictive framework for how plant species interactions vary inversely across an environmental stress gradient, predicting that facilitation is stronger with increasing levels of stress. The SGH has been supported in numerous ecosystems and across a variety of stress gradients, but recent research has demonstrated contradictory results. These discrepancies have led to SGH revisions that expand its conceptual framework by incorporating additional factors, such as other stressor types and variations in species life history strategies. In this dissertation, I examine a further modification of the SGH by proposing and testing a Multiple Stress Gradient Hypothesis (MSGH) that considers how plant interactions vary along a continuous gradient of two co-occurring stressors using mangrove and salt marsh communities as a case study. In Chapter 1, I outline the predictive framework of a MSGH, by creating a series of predictions of species interactions. The components of the MSGH predict that stressors of similar types (e.g., resource and nonresource) will have similar effects and be additive. On the other hand, varying species life history strategies and life stages will lead to extremes of plant interactions. In Chapter 2, I performed a series of experiments to test the various components of the MSGH. In Chapter 3, I performed a large-scale observational study to test whether multiple co-occurring stressors altered the cumulative effects on plant interactions, and if these stressors should be grouped (e.g., resource and non-resource, abiotic and biotic, etc.) to enhance predictability. From a series of studies conducted herein, I concluded that co-occurring stressors are important factors that control complex species interactions as shown in my MSGH modeling approach. Further, future theories need to incorporate species-specific and stressor specific grouping when modeling how species interactions shape communities.
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Date Issued: 2013
PURL: http://purl.flvc.org/fau/fd/FA0004011
Subject Headings: Coastal ecology, Ecophysiology, Mangrove ecology, Plant ecology, Salt marsh ecology
Format: Document (PDF)

Title: Visual and electrosensory ecology of batoid elasmobranchs.
Creator: Bedore, Christine N., Charles E. Schmidt College of Science, Department of Biological Sciences
Abstract/Description: The electrosensory and visual adaptations of elasmobranchs to the environment have been more studied than most other senses, however, work on these senses is mostly limited to descriptive analyses of sensitivity, morphology, and behavior. The goal of this work was to explore electrosensory and visual capabilities in a more ecological context. To gain an understanding of the content of bioelectric signals, the magnitude and frequency of these stimuli were recorded from a broad survey of...
Show moreThe electrosensory and visual adaptations of elasmobranchs to the environment have been more studied than most other senses, however, work on these senses is mostly limited to descriptive analyses of sensitivity, morphology, and behavior. The goal of this work was to explore electrosensory and visual capabilities in a more ecological context. To gain an understanding of the content of bioelectric signals, the magnitude and frequency of these stimuli were recorded from a broad survey of elasmobranch prey items... Color vision adaptations also correlated to the photic environment of each species; cownose rays inhabit turbid, green-dominated waters and had two cone visual pigments that maximize contrast of objects against the green background... Yellow stingrays were trichromatic and likely possess the ability to discriminate colors in their clear, reef and seagrass habitats, which are spectrally rich. Both species showed evidence of ultraviolet sensitivity, which may aid in predator and conspecific detection as an enhanced communication channel. Future studies should investigate the integration of sensory input and sensory involvement in intraspecific communication to gain more insight into ecological adaptations.
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Date Issued: 2013
PURL: http://purl.flvc.org/fcla/dt/3362337
Subject Headings: Visual discrimination, Adaptation (Biology), Animal ecophysiology, Chondrichthyes, Physiology
Format: Document (PDF)

Title: Effects of stressors on differential gene expression and secondary metabolites by Axinella corrugata.
Creator: Grima, Jennifer., Charles E. Schmidt College of Science, Department of Biological Sciences
Abstract/Description: Sponges are an important source of bioactive marine natural products, or secondary metabolites. The common Caribbean reef sponge, Axinella corrugata, produces an antitumor and antibacterial chemical, stevensine. This study determined whether environmental stressors, such as elevated temperature and exposure to Amphibalanus amphitrite larvae, affect the production of stevensine by A.corrugata and if the stressors caused A.corrugata to exhibit differential gene expression. Temperature stress...
Show moreSponges are an important source of bioactive marine natural products, or secondary metabolites. The common Caribbean reef sponge, Axinella corrugata, produces an antitumor and antibacterial chemical, stevensine. This study determined whether environmental stressors, such as elevated temperature and exposure to Amphibalanus amphitrite larvae, affect the production of stevensine by A.corrugata and if the stressors caused A.corrugata to exhibit differential gene expression. Temperature stress resulted in no significant change in the production of stevensine; only two genes were significantly differentially expressed, including hsp70. Larval stressed resulted in increased production of stevensine and significant differential gene expression (more than seventy genes). This study suggests that A.corrugata may be resilient to elevations in temperature and that one of stevensine's roles in nature is as an antifoulant.
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Date Issued: 2013
PURL: http://purl.flvc.org/fcla/dt/3360781
Subject Headings: Axinellida, Sponges, Marine pharmacology, Adaptation (Biology), Gene expression, Genetic regulation, Stress (Physiology), Ecophysiology
Format: Document (PDF)

Title: Neuroprotection during anoxic-stress in Drosophila melanogaster: the role of PKG pathway on protection of function and survival.
Creator: Benasayag Meszaros, Raquel, Charles E. Schmidt College of Science, Department of Biological Sciences
Abstract/Description: Anoxia is characterized by an absence of oxygen supply to a tissue (Dawson- Scully et al., 2010). Unlike humans, Drosophila melanogaster is an organism that can survive low oxygen levels for hours without showing any pathology (Lutz et al., 2003) Under anoxia, the fruit fly loses locomotive activity, resulting in an anoxic coma (Haddad et al., 1997). In this study we investigate the influence of five variables for anoxic tolerance in adult Drosophila: 1) anoxic environment (gas vs. drowning),...
Show moreAnoxia is characterized by an absence of oxygen supply to a tissue (Dawson- Scully et al., 2010). Unlike humans, Drosophila melanogaster is an organism that can survive low oxygen levels for hours without showing any pathology (Lutz et al., 2003) Under anoxia, the fruit fly loses locomotive activity, resulting in an anoxic coma (Haddad et al., 1997). In this study we investigate the influence of five variables for anoxic tolerance in adult Drosophila: 1) anoxic environment (gas vs. drowning), 2) anoxia duration, 3) temperature (cold [3ÀC] or room temperature [21ÀC]), 4) age (young 2-9 days and old 35-39 days), and 5) PKG variation. Tolerance to anoxia is measured by the time of recovery and survival of the fruit fly from the anoxic coma. The results from this study show that short stress, low temperature, young age, and low PKG activity increased anoxic tolerance. Our findings will lay the foundation to investigate different variables, genes or pharmacological compounds that can modulate neuronal anoxic tolerance.
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Date Issued: 2013
PURL: http://purl.flvc.org/FAU/3360743
Subject Headings: Protein kinases, Oxidativie stress, Prevention, Oxidativie stress, Ecophysiology, Drosophila melanogaster, Life cycles
Format: Document (PDF)

Title: Comparative ecophysiology of bloom-forming macroalgae in the Indian River Lagoon, Florida: Ulva lactuca (Chlorophyta), Hypnea musciformis, and Gracilaria tikvahiae (Rhodophyta).
Creator: Vlaming, Lisa N.A., Charles E. Schmidt College of Science, Department of Biological Sciences
Abstract/Description: Macroalgal blooms are responses to nutrient enrichment in shallow seagrass ecosystems like the Indian River Lagoon (IRL), Florida. Little is known about nitrogen (N) and phosphorus (P) limitation or the importance of morphological/physiological characteristics of bloom-forming macroalgae (Ulva lactuca, Hypnea musciformis, and Gracilaria tikvahiae) in the IRL. We hypothesized: 1) all species would proliferate in nutrient-rich Titusville, 2) opportunistic U. lactuca would dominate, 3) Rapid...
Show moreMacroalgal blooms are responses to nutrient enrichment in shallow seagrass ecosystems like the Indian River Lagoon (IRL), Florida. Little is known about nitrogen (N) and phosphorus (P) limitation or the importance of morphological/physiological characteristics of bloom-forming macroalgae (Ulva lactuca, Hypnea musciformis, and Gracilaria tikvahiae) in the IRL. We hypothesized: 1) all species would proliferate in nutrient-rich Titusville, 2) opportunistic U. lactuca would dominate, 3) Rapid Light Curves (RLCs) would assess nutrient status, and 4) nutrient concentrations would regulate growth more than N:P ratios. Field studies showed rapid biomass doubling times of 2 days (U. lactuca; November 2012) in urbanized Titusville. RLCs in a guano-enriched island off Big Pine Key (BPK) and Titusville (Ulva spp.) were similar due to P-saturation. Laboratory studies showed three-fold higher RLCs and two-fold faster growth at high nutrient concentrations of N and P. Reductions of both N and P will be required to moderate future blooms.
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Date Issued: 2013
PURL: http://purl.flvc.org/fcla/dt/3361257
Subject Headings: Marine algae, Marine algae, Ecophysiology, Marine algae, Adaptation, Algal blooms
Format: Document (PDF)

FAU Theses and Dissertations (5)	+ -
HBOI Faculty Contributions (3)	+ -

Ecophysiology (6)	+ -
Adaptation (Biology) (2)	+ -
Adaptation (1)	+ -
Algal blooms (1)	+ -
Animal ecophysiology (1)	+ -

Axinellida (1)	+ -
Brown algae (1)	+ -
Centrarchidae (1)	+ -
Chondrichthyes (1)	+ -
Coastal ecology (1)	+ -
Drosophila melanogaster (1)	+ -
Florida (1)	+ -
Gene expression (1)	+ -
Genetic regulation (1)	+ -
Hypoxia (Water) (1)	+ -
Life cycles (1)	+ -
Mangrove ecology (1)	+ -
Mangrove swamps (1)	+ -
Marine algae (1)	+ -
Marine pharmacology (1)	+ -
Oxidativie stress (1)	+ -
Physiological ecology (1)	+ -
Physiology (1)	+ -
Physiology, Comparative (1)	+ -
Plant ecology (1)	+ -
Plant ecophysiology (1)	+ -
Prevention (1)	+ -
Protein kinases (1)	+ -
Salinity (1)	+ -
Salt marsh ecology (1)	+ -

Florida (1)	+ -
Indian River (Fla. : Lagoon) (1)	+ -
Indian River (Lagoon) (1)	+ -

Electronic Thesis or Dissertation (5)	+ -
article (3)	+ -

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