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Articles 1 - 11 of 11
Full-Text Articles in Physical Sciences and Mathematics
Final Report Biological Monitoring Of The Hollywood-Hallandale Beach Renourishment, Richard Dodge, Walter Goldberg, Charles Messing, Steven C. Hess
Final Report Biological Monitoring Of The Hollywood-Hallandale Beach Renourishment, Richard Dodge, Walter Goldberg, Charles Messing, Steven C. Hess
Marine & Environmental Sciences Faculty Reports
A four-year study was undertaken to survey Broward County, Florida (southeast Florida) coral communities and infaunal marine biota in relation to possible effects from the Hollywood- Hallandale Beach renourishment project. Beach restoration involves dredging sand from offshore deposits and placing it on eroded beaches, activities which may cause sedimentation and turbidity. Coral reefs were assessed using transect and quadrat surveys at a total of 15 stations, unevenly distributed between dredging impact (n=9) and control (n=6) areas to characterize and quantify populations of sponges, gorgonians, scleractinian corals, as well as other less well represented groups. In addition, the infauna of sand …
Molecular Evolution Of Numt, A Recent Transfer And Tandem Amplification Of Mitochondrial Dna Into The Nuclear Genome Of The Domestic Cat (Felis Catus), Jose V. Lopez
Oceanography Faculty Theses and Dissertations
Mitochondrial DNA (mtDNA) are functional cytoplasmic chromosomes, tracing origins to a symbiotic infection of eukaryotic cells by bacterial progenitors. As prescribed by the Serial Endosymbiosis Theory, symbionts have gradually transferred their genes to the nuclear genome that enable functional interaction. In this dissertation, a 7.9 kb transposition of a typically 17.0 kb mitochondrial genome to a specific chromosomal position in the domestic cat is reported. The integrated mtDNA has amplified about 38-76 times and now occurs as a "macrosatellite"-like tandem repeat with multiple length alleles resolved by pulse field gel electrophoresis (PFGE) segregating in cat populations. To examine the tempo …
Evaluation Of A Novel Material For Recycling Tires Into Artificial Reefs - Final Report, Richard E. Spieler
Evaluation Of A Novel Material For Recycling Tires Into Artificial Reefs - Final Report, Richard E. Spieler
Marine & Environmental Sciences Faculty Reports
The purpose of this study was to evaluate, from a biological perspective, a tire-concrete aggregate which uses tire shreds mixed into concrete, as a suitable reef building material. Evaluation consisted of comparing the biological assemblages associated with tire-aggregate reefs to standard gravel-concrete reefs of the same design. Four artificial reefs of concrete, tetrahedron modules were placed off Fort Lauderdale, Florida in seven meters of water, two reefs of each type of aggregate. Each reef contains 25 small (1m/side) and 25 large (1.3m/side) tetrahedrons stacked in a random configuration. The reefs were monitored at monthly, or less, intervals for 28 months. …
Tissue Damage In Scleractinian And Alcyonacean Corals Due To Experimental Exposure To Sedimentation, Bernhard Riegl, Jonathan P. Bloomer
Tissue Damage In Scleractinian And Alcyonacean Corals Due To Experimental Exposure To Sedimentation, Bernhard Riegl, Jonathan P. Bloomer
Marine & Environmental Sciences Faculty Proceedings, Presentations, Speeches, Lectures
Four South African scleractinian corals (Favia favus, Favites pentagona, Platygyra daedalea and Gyrosmilia interrupta) and four alcyonacean corals (Lobophytum depressum, Lobophytum venustum, Sinularia dura and Sinularia leptoclados) were experimentally exposed to high sedimentation conditions in the laboratory during a period of six weeks. Experimental sedimentation corresponded to the highest measured sedimentation levels on South African coral reefs, being 200 mg cm-2h-l. Corals were monitored for tissue necroses and bleaching during the course of the experiment and histological sections were prepared after the termination of the experiment. During the experiment, tissue necroses appeared earlier and more frequently in alcyonacea than in …
Is Coral Community Structure Linked To Damage Susceptibility? A Case Study From South Africa, Bernhard Riegl, Peter A. Cook
Is Coral Community Structure Linked To Damage Susceptibility? A Case Study From South Africa, Bernhard Riegl, Peter A. Cook
Marine & Environmental Sciences Faculty Proceedings, Presentations, Speeches, Lectures
Africa's southernmost coral communities are situated in northern Natal, South Africa (27°50' S), within the Maputaland and St. Lucia Marine Reserves. Growing concern about the possible impact of recreational acti vities on the health of the coral ecosystem prompted the present study on the structure and health of the reefs. Coral community studies by means of line transects identified three basic coral community types, which correlated with the geomorphology of the sandstone outcrops on which corals grew. 1) Fossil dunes were dominated by alcyonacea in depths between 8 and 24 m. 2) Flat outcrops between 18 and 24 m depth …
Spring 1995, Nsu Oceanographic Center
Fall 1995, Nsu Oceanographic Center
Summer 1995, Nsu Oceanographic Center
Winter 1995, Nsu Oceanographic Center
Taphonomy Of Isocrinid Stalks: Influence Of Decay And Autotomy, Tomasz K. Baumiller, Ghislaine Llewellyn, Charles G. Messing, William I. Ausich
Taphonomy Of Isocrinid Stalks: Influence Of Decay And Autotomy, Tomasz K. Baumiller, Ghislaine Llewellyn, Charles G. Messing, William I. Ausich
Marine & Environmental Sciences Faculty Articles
Stalks of isocrinid crinoids are differentiated into cirri-bearing columnals (nodals) and columnals lacking cirri (internodals). This skeletal differentiation allowed us to test whether stalk fragmentation is random or whether it occurs preferentially at a specific articulation. Our analyses indicate that the patterns of fragmentation in multicolumnal segments of extant isocrinids collected by submersible, by dredging, and in sediment samples, as well as those found as fossils, are nonrandom. The preferred plane of fragmentation corresponds to the synostosis, the articulation between a nodal and the internodal distal to it. In isocrinids this articulation has a characteristic morphology and is the site …
Alkaline Phosphatase Activity And Phosphorus Limitation In Marine Macroalgae From The Florida Keys And The Bahamas, Christine M. Urnezis
Alkaline Phosphatase Activity And Phosphorus Limitation In Marine Macroalgae From The Florida Keys And The Bahamas, Christine M. Urnezis
HCNSO Student Theses and Dissertations
Anthropogenic nutrient enrichment and coastal eutrophication are a primary threat to the biological integrity of coral reef ecosystems. Macroalgal blooms are one symptom of eutrophication and provide useful 'bioindicators' of the nutrient dynamics associated with the eutrophication process. This study used marine macroalgae to monitor physiological processes associated with eutrophication by comparing the degree of phosphorus (P) limitation in reef and nearshore environments of the highly developed Florida Keys with the relatively pristine Bahamas by measuring enzymatic alkaline phosphatase activity (APA), tissue composition, and water column nutrient concentrations [total nitrogen (TN) and total phosphorus (TP)]. Experimental nutrient enrichment studies were …