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Cell Cycle Regulation In The Florida Red Tide Dinoflagellate Karenia Brevis
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Book Synopsis Cell Cycle Regulation in the Florida Red Tide Dinoflagellate, Karenia Brevis by : Stephanie Alexandra Brunelle
Download or read book Cell Cycle Regulation in the Florida Red Tide Dinoflagellate, Karenia Brevis written by Stephanie Alexandra Brunelle and published by . This book was released on 2011 with total page 446 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Characterization and Regulation of Gene Expression Networks in Response to Acute Environmental Stress in the Florida Red Tide Dinoflagellate, Karenia Brevis by : Kristy Blair Lidie
Download or read book Characterization and Regulation of Gene Expression Networks in Response to Acute Environmental Stress in the Florida Red Tide Dinoflagellate, Karenia Brevis written by Kristy Blair Lidie and published by . This book was released on 2007 with total page 498 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Biochemical Analysis of Diel Vertical Migration in the Red Tide Dinoflagellate Karenia Brevis by :
Download or read book Biochemical Analysis of Diel Vertical Migration in the Red Tide Dinoflagellate Karenia Brevis written by and published by . This book was released on 2002 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Many laboratories have solely used the Wilson isolate to characterize the red tide dinoflagellate species Karenia brevis. Recent work has provided new isolates from different geographical locations. Prior to detailed biochemical investigations, laboratory studies were conducted on ten different isolates representing geographical locations around the coast of Florida. The investigation of the physiological parameters for the ten different isolates provided a foundation for the proper selection of a single isolate that would closely represent the species in the field. Each isolate was capable of a range of responses with primary dependence on cell counts within the cultures. Evidence suggests that either carbon limitation or bacterial negative feedback caused changes in the physiological parameters as cell counts increased. The Apalachicola isolate was selected for further biochemical investigations because it was representative of the group response. A nutrient-replete intermediate-light mesocosm experiment investigated the taxis patterns, and the biochemical composition of vertically migrating K. brevis populations. This experiment confirmed the internal biochemical status of the cell controlled migratory behavior, growth and reproduction. Young cells fixed carbon at the surface while older cells limited vertical migration toward the middle depth in anticipation of cellular division. The cells were capable of performing complex lipid control during vertical migration. Quick turnover of these lipids indicated K. brevis was more than capable of taking advantage of changing physical conditions. Finally, nutrient replete and deplete mesocosms investigated how K. brevis responded to field-simulated high light conditions. Results from high light and nitrogen-limited exposure suggested K. brevis may utilize the benthos by minimizing exposure to oxidative stress and as a nitrogen source supplied from benthic pore-water flow in permeable sediments. High light also caused K.
Book Synopsis Ecology of Harmful Algae by : E. Granéli
Download or read book Ecology of Harmful Algae written by E. Granéli and published by Springer Science & Business Media. This book was released on 2006-09-24 with total page 418 pages. Available in PDF, EPUB and Kindle. Book excerpt: Harmful algal can cause a variety of deleterious effects, including the poisoning of fish and shellfish, habitat disruptions for many organisms, water discoloration, beach fouling, and even toxic effects for humans. In this volume, international experts provide an in-depth analysis of harmful algae topics and offer a comprehensive synthesis of the latest research in the field.
Book Synopsis The Microbial Community Associated with the Florida Red Tide Dinoflagellate Karenia Brevis by : Patricia Blair Roth
Download or read book The Microbial Community Associated with the Florida Red Tide Dinoflagellate Karenia Brevis written by Patricia Blair Roth and published by . This book was released on 2005 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Zooplankton Population Dynamics in Relation to the Red Tide Dinoflagellate Karenia Brevis on the West Florida Shelf of the Gulf of Mexico by : Brianne M. Walsh
Download or read book Zooplankton Population Dynamics in Relation to the Red Tide Dinoflagellate Karenia Brevis on the West Florida Shelf of the Gulf of Mexico written by Brianne M. Walsh and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Characterization of Polyketide Synthases in the Florida Red Tide Dinoflagellate Karenia Brevis by : Emily A. Monroe
Download or read book Characterization of Polyketide Synthases in the Florida Red Tide Dinoflagellate Karenia Brevis written by Emily A. Monroe and published by . This book was released on 2008 with total page 410 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Encyclopedia of Environmental Health by :
Download or read book Encyclopedia of Environmental Health written by and published by Elsevier. This book was released on 2019-08-22 with total page 4896 pages. Available in PDF, EPUB and Kindle. Book excerpt: Encyclopedia of Environmental Health, Second Edition, Six Volume Set presents the newest release in this fundamental reference that updates and broadens the umbrella of environmental health, especially social and environmental health for its readers. There is ongoing revolution in governance, policies and intervention strategies aimed at evolving changes in health disparities, disease burden, trans-boundary transport and health hazards. This new edition reflects these realities, mapping new directions in the field that include how to minimize threats and develop new scientific paradigms that address emerging local, national and global environmental concerns. Represents a one-stop resource for scientifically reliable information on environmental health Fills a critical gap, with information on one of the most rapidly growing scientific fields of our time Provides comparative approaches to environmental health practice and research in different countries and regions of the world Covers issues behind specific questions and describes the best available scientific methods for environmental risk assessment
Book Synopsis Evidence for a Sexual Cycle in the Florida Red Tide Dinoflagellate, Ptychodiscus Brevis ( by : Linda M. Walker
Download or read book Evidence for a Sexual Cycle in the Florida Red Tide Dinoflagellate, Ptychodiscus Brevis ( written by Linda M. Walker and published by . This book was released on 1982 with total page 293 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Grazing on Synnechococcis Spp. by the Red-tide Dinoflagellate Karenia Brevis by : Leo A. Procise
Download or read book Grazing on Synnechococcis Spp. by the Red-tide Dinoflagellate Karenia Brevis written by Leo A. Procise and published by . This book was released on 2012 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Effects of the Red Tide Producing Dinoflagellate, Karenia Brevis, and Associated Brevetoxins on Viability and Sublethal Stress Responses in Scleractinian Coral by : David Anthony Reynolds
Download or read book The Effects of the Red Tide Producing Dinoflagellate, Karenia Brevis, and Associated Brevetoxins on Viability and Sublethal Stress Responses in Scleractinian Coral written by David Anthony Reynolds and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Coral cover is in decline on a global scale, with increased mortality events being attributed to a number of global and regional stressors. While the impacts of global stressors (e.g. sea surface temperature rise, ocean acidification) are well documented, there is growing interest in identifying and understanding the impacts of regional stressors. The reason for this change in focus is that regional stressors can often work in combination, sometimes synergistically, with global stressors and that stressors on a regional scale tend to be more easily mitigated by management practices. One regional stressor that impacts a myriad of marine organisms in the southeastern United States is the annual red tide blooms produced by the dinoflagellate, Karenia brevis. Their impacts, along with the lipid soluble polyether neurotoxins they produce, termed brevetoxins, are well studied in economically important organisms, such as bivalves. However, little is known of their impacts on organisms that possess ecological importance, such as species of scleractinian coral. To address this gap in knowledge, a multifaceted study is discussed herein, which evaluated the effects of ecologically relevant concentrations of K. brevis and associated brevetoxins on different coral life history stages and coral species. The second chapter addresses the impacts of red tide on larval behavior, settlement and survival of the coral species Porites astreoides, as well as impacts of photochemical efficiency and oxidative stress within different coral species (P. astreoides larvae, P. astreoides adults, Acropora cervicornis, Cladocora arbuscula, and Phyllangia americana). The third chapter confers the use of broad-scale proteomic analysis to identify the cellular response of the non-model coral species, P. astreoides, following exposure to red tide. Coral larvae actively avoided both medium and high bloom conditions of K. brevis and brevetoxins, while percent larval settlement and survival were impacted following exposure to high bloom concentrations of K. brevis. Photochemical efficiency of in hospite Symbiodinium was reduced following exposure to both K. brevis and brevetoxin in P. astreoides larvae, as well as exposure to K. brevis in P. astreoides adults, while being unimpacted in A. cervicornis. Compared to controls, high bloom conditions resulted in an increase in biomarkers of lipid peroxidation in C. arbuscula. This was also seen in P. astreoides larvae at 24 hours; however, this difference was indistinguishable following 48 hours. Surprisingly, no other biomarker of oxidative stress analyzed were impacted. Broad-scale proteomic analysis of P. astreoides following exposure to red tide conditions revealed variable changes in proteome expression depending on if the corals were exposed to K. brevis or brevetoxins. Exposure to brevetoxins resulted in differential expression of proteins related to DNA organization, chromatin formation and transcription expression; while exposure to K. brevis resulted in differential expression of proteins related to redox homeostasis, protein folding, energy metabolism, and production of reactive oxygen species. The results of this study demonstrate the potential for annual red tide blooms to act as a regional stressor on coral species. They highlight the ability of red tide conditions to negatively impact coral at multiple life history stages and that the extent of these effects may be species specific. They also provide further incite of coral's response to red tide exposure at the cellular level.
Book Synopsis Investigating Algicidal Amines as Agents for Chemical Control of Toxic Dinoflagellate Karenia Brevis by : Gretchen Johnson
Download or read book Investigating Algicidal Amines as Agents for Chemical Control of Toxic Dinoflagellate Karenia Brevis written by Gretchen Johnson and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The dinoflagellate Karenia brevis causes harmful algal blooms, called red tides, that increasingly disrupt ecosystems and economic activity in the western coast of Florida. Strategizing for a future of imminent red tide demands interventive control options for severe blooms. Bio-inspired chemical control attempts to synergistically merge the concepts of chemical control and biotic control, incorporating the logistical advantages of the former and the environmental consciousness of the latter. Amine compounds identified in a dinoflagellate-specific bacterial algicide were assessed for their potential to control the abundance of K. brevis. First, dose-response of K. brevis to four selected compounds was measured. Three of those, ammonia, putrescine, and spermidine, controlled K. brevis and had lesser effects on a nontarget algal species. To improve dose efficiency, combinations of these compounds were screened for synergistic interaction. Three combined amine doses potentiated by synergisms proceeded to testing on natural microbial communities collected from a field site subject to red tide. The impact of these doses on nontarget microbes was compared. 0.9 ppm ammonium with 7.5 ppm putrescine, hereafter "NP", emerged as preferable with respect to effects on photosynthetic biomass and photophysiological stress. Next, NP was applied to a naturally-occurring red tide where it controlled K. brevis and restructured microbial communities. Dynamics in microbial communities and water chemistry parameters were then monitored over 7 days in NP-treated. NP demonstrated control of non-K. brevis dinoflagellates in non-red tide communities, with specificity over diatoms and other phytoplankton groups. Effects of NP on pH, turbidity, and dissolved oxygen of mesocosms revealed pertinent considerations for future field application. Putrescine had short residence times whereas ammonia accumulated to potentially toxic levels. Ultimately, NP, formulated from commercially-available and relatively inexpensive amine compounds produced by naturally-occurring algicidal bacteria, exhibited potent, taxonomically-specific control of K. brevis in complex natural microbial communities. Thus, efforts to replicate this result and further engineer NP for eventual field deployment are supported.
Book Synopsis Dinoflagellates by : David L. Spector
Download or read book Dinoflagellates written by David L. Spector and published by Academic Press. This book was released on 2012-12-02 with total page 560 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book begins with a general introduction and a taxonomic description of the dinoflagellates both to acquaint those unfamiliar with this group of organisms and to set the tone for the rest of the volume. It then addresses the following topics: cell biology (cell cortex, nuclear structure, cell cycle and mitosis, sexual reproduction, cysts and unusual inclusions); biochemistry (physiology and biochemistry, blooms and toxins, and biorhythms); and genetics. In addition, a comprehensive chapter on cell culturing provides the reader with an understanding of the growth conditions and requirements of various dinoflagellates and a simple to follow listing of culture media, all expressed in similar units for ease of comparison. The volume closes with a chapter on evolution which evaluates many of the features of dinoflagellates discussed in the text in terms of evolutionary significance. We hope that this treatise will be of use to research workers and students in the area of dinoflagellate biology and in other areas of biology in which dinoflagellates may be used as a model system for studying various biological problems.
Book Synopsis Ferredoxin and Flavodoxin Regulation in the Dinoflagellate Karenia Brevis by : Aimee Renee Neeley
Download or read book Ferredoxin and Flavodoxin Regulation in the Dinoflagellate Karenia Brevis written by Aimee Renee Neeley and published by . This book was released on 2005 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Biochemical Analysis of Diel Vertical Migration in the Red Tide Dinoflagellate Karenia Brevis by : Blake Allen Schaeffer
Download or read book Biochemical Analysis of Diel Vertical Migration in the Red Tide Dinoflagellate Karenia Brevis written by Blake Allen Schaeffer and published by . This book was released on 2006 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt: A nutrient-replete intermediate-light mesocosm experiment investigated the taxis patterns, and the biochemical composition of vertically migrating K. brevis populations. This experiment confirmed the internal biochemical status of the cell controlled migratory behavior, growth and reproduction. Young cells fixed carbon at the surface while older cells limited vertical migration toward the middle depth in anticipation of cellular division. The cells were capable of performing complex lipid control during vertical migration. Quick turnover of these lipids indicated K. brevis was more than capable of taking advantage of changing physical conditions.
Book Synopsis Intergenic Regions and Repeating Gene Sequences in the Dinoflagellate Karenia Brevis by : Colleen Alison Gregg
Download or read book Intergenic Regions and Repeating Gene Sequences in the Dinoflagellate Karenia Brevis written by Colleen Alison Gregg and published by . This book was released on 2013 with total page 37 pages. Available in PDF, EPUB and Kindle. Book excerpt: Karenia brevis is a species of dinoflagellates that is responsible for "red tides" (more formally known as harmful algal blooms) found in the Gulf of Mexico. The blooms have adverse effects on humans and marine animals. Karenia brevis produces toxins that, in humans, can cause upper and lower respiratory problems as well as nausea and vomiting. For marine mammals, birds, fish, and other marine organisms, exposure to brevetoxins can result in morbidity and even death. Even with the technology and resources we have today, scientist do not fully understand the mechanisms behind toxin production and bloom initiation. Because cellular processes may play a major role in Karenia brevis blooms, attempts have been made to understand K. brevis at the molecular level, but studies are still ongoing due to lack of understanding gene organization and expression. Thus, our goal was to help guide the reconstruction or sequencing of the genome. The purpose of my research was to find if there are multiple copies of certain gene sequences, and what variability exists between and within the genes. I attempted determine the copy number of a suspected multi-copy gene and if any sequence variability existed within the gene and the intergenic regions. Focus was placed on the gene for proliferating cell nuclear antigen (PCNA) whose known function is to aid in DNA replication and repair, because the PCNA is present in multiple copies and (Zhang et al. 2006) and the EST collection of K. brevis contained several PCNA single nucleotide polymorphisms (Lidie et al, 2005; McLean, unpublished data).--P. 1.
Book Synopsis Influence of Water Column Stratification and Nutrient Gradients On The Migratory Behavior of The Red Tide Dinoflagellate, Karenia Brevis by : Matthew Garrett
Download or read book Influence of Water Column Stratification and Nutrient Gradients On The Migratory Behavior of The Red Tide Dinoflagellate, Karenia Brevis written by Matthew Garrett and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Diel vertical migration (DVM) can offer motile phytoplankton a competitive advantage over other phytoplankton species. DVM has been well documented in the harmful dinoflagellate, Karenia brevis; however, the extent to which changes in nutrient regimes and density stratification modify migration patterns has not been thoroughly investigated. A 2 m experimental column was constructed with sensors and sampling ports at four depths to obtain fluorescence and temperature measurements and discrete water samples. The environmental parameters of the experimental column represented temperature and nutrient conditions found on the West Florida Shelf (WFS), where Karenia blooms frequently occur. Results demonstrated a clear DVM pattern for K. brevis where surface aggregations occurred during light periods, and bottom aggregations occurred in dark periods. However, the rate and intensity of migration varied between experimental conditions. Injections of nutrient replete water at the surface and bottom did not appear to modify migratory behavior, in that a portion of the population resided at depth regardless of light or dark periods. Weak density stratification caused a delay in downward migration in dark periods, whereas strong density stratification caused a complete cessation of downward migration. In a weakly stratified environment with a bottom injected replete water mass, DVM patterns most closely replicate the pattern under weakly stratified conditions alone. Modifications in the natural DVM pattern of K. brevis with respect to varying environmental and nutrient conditions that occur on the WFS can have major implications current forecast model predictions, and for monitoring and mitigation strategies.
