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Full-Text Articles in Physical Sciences and Mathematics
An Experimental Histopathological Rating Scale Of Sedimentation Stress In The Caribbean Coral Montastraea Cavernosa, Bernardo Vargas-Ángel, Bernhard Riegl, David S. Gilliam, Richard E. Dodge
An Experimental Histopathological Rating Scale Of Sedimentation Stress In The Caribbean Coral Montastraea Cavernosa, Bernardo Vargas-Ángel, Bernhard Riegl, David S. Gilliam, Richard E. Dodge
Marine & Environmental Sciences Faculty Proceedings, Presentations, Speeches, Lectures
Colonies of Montastraea cavernosa were exposed to daily applications of approx. 200–225 mg cm– 2 sediments, during a four-week period, in order to investigate coral responses to increased sedimentation. Effects were assessed based on the histopathological condition of specimen tissues. Mild stress responses were noted as early as week one, including tissue swelling and polyp retraction, as well as changes in size and appearance of mucous secretory cells. As stress progressed, further inflammation of the mucous secretory cells was observed. Severe effects were observed in weeks 3 and 4, including atrophy of the outer epidermis, increased granularity and debris in …
Visual_Hea: Habitat Equivalency Analysis Software To Calculate Compensatory Restoration Following Natural Resource Injury, Kevin E. Kohler, Richard E. Dodge
Visual_Hea: Habitat Equivalency Analysis Software To Calculate Compensatory Restoration Following Natural Resource Injury, Kevin E. Kohler, Richard E. Dodge
Marine & Environmental Sciences Faculty Proceedings, Presentations, Speeches, Lectures
Habitat Equivalency Analysis (HEA) is a means to determine the amount of compensatory restoration required to provide services that are equivalent to the interim loss of natural resource services following an injury. HEA includes a discounting procedure to account for asset valuation in that the total asset value is equal to the discounted value of the future stream of all services from the natural resource or the compensatory resource. Discounting is used to include the relative valuation of loss and gain of ecological services of the resources over time. Visual_HEA is a computer program developed to calculate the amount of …
Growth And Survivorship Of Scleractinian Coral Transplants And The Effectiveness Of Plugging Core Holes In Transplant Donor Colonies, Elizabeth Glynn Fahy, Richard E. Dodge, Daniel P. Fahy, T. Patrick Quinn, David S. Gilliam, Richard E. Spieler
Growth And Survivorship Of Scleractinian Coral Transplants And The Effectiveness Of Plugging Core Holes In Transplant Donor Colonies, Elizabeth Glynn Fahy, Richard E. Dodge, Daniel P. Fahy, T. Patrick Quinn, David S. Gilliam, Richard E. Spieler
Marine & Environmental Sciences Faculty Proceedings, Presentations, Speeches, Lectures
Replicate scleractinian coral transplants were obtained from the species Meandrina meandrites and Montastrea cavernosa on a natural reef, off Dania Beach, Florida, using a hydraulic drill fitted with a 4 in. (~10 cm) core barrel. The transplants were fixed to Reef Ball™ substrates using an adhesive marine epoxy. Drill holes in the donor corals (core holes) were filled with concrete plugs. Control corals, of comparable size to both donor colonies and transplant corals, were monitored for comparison. Transplant corals, donor corals, and controls on the natural reef were monitored for growth and survivorship. Core holes were monitored for tissue regrowth …
Spatial Patterns In Arabian Gulf Coral Assemblages (Jebel Ali, Dubai, U.A.E.) In Response To Temperature-Forcing, Bernhard Riegl, Samuel J. Purkis, Kevin E. Kohler, Richard E. Dodge
Spatial Patterns In Arabian Gulf Coral Assemblages (Jebel Ali, Dubai, U.A.E.) In Response To Temperature-Forcing, Bernhard Riegl, Samuel J. Purkis, Kevin E. Kohler, Richard E. Dodge
Marine & Environmental Sciences Faculty Proceedings, Presentations, Speeches, Lectures
We evaluated spatial and temporal patterns using maps from Ikonos satellite imagery in combination with 8 years of line transects and photosquares and the HadISST1 sea-surface temperature data set to explain why coral assemblages in the southern Arabian Gulf (Dubai) are impoverished and mostly do not build framework reefs. Analysis of archive sea surface temperature (SST) data confirms that the area is subjected to recurrent temperature anomalies. Frequencies of anomalies might suggest at least a partial link to the El Niño Southern Oscillation possibly via the Indian Ocean Zonal Mode. The dominant driver of local temperature was oscillations in the …
Fractal Patterns Of Coral Communities: Evidence From Remote Sensing (Arabian Gulf, Dubai, U.A.E.), Samuel J. Purkis, Bernhard Riegl, Richard E. Dodge (Editor)
Fractal Patterns Of Coral Communities: Evidence From Remote Sensing (Arabian Gulf, Dubai, U.A.E.), Samuel J. Purkis, Bernhard Riegl, Richard E. Dodge (Editor)
Marine & Environmental Sciences Faculty Proceedings, Presentations, Speeches, Lectures
In this study, the spatial character of benthic communities is investigated in an Arabian Gulf shallow subtidal carbonate ramp setting, using IKONOS satellite imagery. The patchy distribution of three assemblages of live and dead corals on extensive (but also fragmented) hardground pavements was investigated using a variety of spatial statistics. It was found that the spatial expression of the benthic groups display characteristics that approximate to power-law distributions over several orders of magnitude to an extent that suggests fractal behaviour. Pronounced anisotropy was observed between the spatial patterns in the near-shore and off-shore region which is attributed to different mechanisms …
Implications Of Natural Variation Of Fish Assemblages To Coral Reef Management, Lance K. B. Jordan, Richard E. Spieler
Implications Of Natural Variation Of Fish Assemblages To Coral Reef Management, Lance K. B. Jordan, Richard E. Spieler
Marine & Environmental Sciences Faculty Proceedings, Presentations, Speeches, Lectures
In order to evaluate the impact of a planned beach renourishment project we obtained baseline data on hardbottom coral reef fish assemblages adjacent to the beach. During the summers of 2001 and 2003 we conducted 92 and 89 visual transect-counts, respectively, each 30x2x1m. Fish were recorded by species, abundance, and size class. Fish exhibited a 62.8% decrease in abundance between the 2001 and 2003 surveys. Juvenile Haemulon spp. (<5cm total length, TL) alone decreased 72.8% in abundance and, due to their predominance, primarily drove the decrease seen for total abundance. The second most abundant species Halichoeres bivittatus, also primarily juveniles (<5cm TL), contributed 8% of the total abundance and also showed a significant decrease between the 2001 and 2003 surveys. Even after removal of the two most abundant taxa, total abundance remained significantly lower the second survey year, suggesting the possibility of a community-wide decrease in abundance. However, the decrease between years was mainly due to a decrease in juveniles. When fish less than 5cm TL were removed from the dataset, no significant difference in abundance between years was detected. Species richness also declined significantly with fewer species noted in 2003 and eight fewer total species between years. Nonetheless, multivariate examination of assemblage structure did not indicate a difference between years. These results have important implications for determining potential anthropogenic change in fish assemblages (e.g. caused by beach renourishment).
Application Of Paleoclimatology To Coral Reef Monitoring And Management, C. Mark Eakin, Peter K. Swart, Terrence M. Quinn, Kevin P. Helmle, Jennifer M. Smith, Richard E. Dodge
Application Of Paleoclimatology To Coral Reef Monitoring And Management, C. Mark Eakin, Peter K. Swart, Terrence M. Quinn, Kevin P. Helmle, Jennifer M. Smith, Richard E. Dodge
Marine & Environmental Sciences Faculty Proceedings, Presentations, Speeches, Lectures
The skeletons of reef-building corals are valuable archives of climatic and environmental information. Paleoclimatic data chiefly have been generated in areas most sensitive to global or regional climatic variability. However, these records also provide valuable information on anthropogenic influences – guidance of value to resource managers. NOAA’s Coral Reef Watch targets observations of current and past coral reef health in or near marine protected areas through satellites, in situ sensor platforms, and paleoclimatic analyses. Paleoclimatic data provide retrospective monitoring through multi-century environmental reconstructions that improve our understanding of past stress to coral reefs. Two sites in the Florida Keys National …