Weights And Balances: Integrating Models For Prevention And Response To Southern California Offshore Oil Spills, Carmen Watts Clayton, Amoret Bunn
STAR (STEM Teacher and Researcher) Program Posters
Licensing offshore oil and gas reserves in the United States waters are overseen by the U.S. Department of the Interior’s Bureau of Safety and Enforcement (BSEE). The licensing application includes planning for any worst-case oil spill scenario between BSEE and the applicant based on lessons learned from historic offshore spills such as the Deepwater Horizon (2010), Exxon Valdez (1989), and the Union Oil Platform Blowout (1969). The process for planning to respond to oil spills involves coordination with multiple agencies, trustees, and stakeholders to ensure that oil spill responses consider multiple factors, including ecologically sensitive species, commercial transportation ...
Water Column Productivity And Temperature Predict Coral Reef Regeneration Across The Indo-Pacific, 2016 Nova Southeastern University
Water Column Productivity And Temperature Predict Coral Reef Regeneration Across The Indo-Pacific, Bernhard Riegl (Editor), Peter W. Glynn, Evie A. Wieters, Samuel J. Purkis, C. D'Angelo, Joerg Wiedenmann
Predicted increases in seawater temperatures accelerate coral reef decline due to mortality by heat-driven coral bleaching. Alteration of the natural nutrient environment of reef corals reduces tolerance of corals to heat and light stress and thus will exacerbate impacts of global warming on reefs. Still, many reefs demonstrate remarkable regeneration from past stress events. This paper investigates the effects of sea surface temperature (SST) and water column productivity on recovery of coral reefs. In 71 Indo-Pacific sites, coral cover changes over the past 1-3 decades correlated negative-exponentially with mean SST, chlorophyll a, and SST rise. At six monitoring sites (Persian ...
Tissue Damage In Scleractinian And Alcyonacean Corals Due To Experimental Exposure To Sedimentation, 2016 : Institut fur Palaontologie der Universitiit Wien
Tissue Damage In Scleractinian And Alcyonacean Corals Due To Experimental Exposure To Sedimentation, Bernhard Riegl, Jonathan P. Bloomer
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 ...
The State Of Coral Reef Ecosystems Of Southeast Florida, 2016 Florida Department of Environmental Protection, Coral Reef Conservation Program
The State Of Coral Reef Ecosystems Of Southeast Florida, Chantal Collier, Rob Ruzicka, Kenneth Banks, Luiz Barbieri, Jeff Beal, David Bingham, James A. Bohnsack, Sandra Brooke, Nancy Craig, Richard E. Dodge (Editor), Louis E. Fisher, Nick Gadbois, David S. Gilliam, Lisa Gregg, Todd Kellison, Vladimir N. Kosmynin, Brian Lapointe, Erin Mcdevitt, Janet Phipps, Nikki Poulos, John Proni, Patrick Quinn, Bernhard Riegl, Richard E. Spieler, Joanna Walczak, Brian K. Walker, Denise Warrick
No abstract provided.
The Statistics Of Natural Shapes In Modern Coral Reef Landscapes, 2016 Nova Southeastern University
The Statistics Of Natural Shapes In Modern Coral Reef Landscapes, Samuel J. Purkis, Kevin E. Kohler, Bernhard Riegl, Steven O. Rohmann
Spatial heterogeneity is a fundamental characteristic of modern and ancient depositional settings, and the scaling of many carbonate environments has been shown to follow power function distributions. The difficulty in obtaining information on the horizontal persistence of sedimentary lithotopes at the basin scale has, however, hampered evaluation of this fact over larger geographic areas. In recent years, large‐scale maps of reef facies derived from remotely sensed data have become widely available, allowing for an analysis of reef‐scale map products from 26 sites spread through four reef provinces, covering >7000 km2 of shallow‐water habitat in the U ...
Spatial Patterns In Arabian Gulf Coral Assemblages (Jebel Ali, Dubai, U.A.E.) In Response To Temperature-Forcing, 2016 Nova Southeastern University
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
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 ...
Status Of Coral Reefs Of Little Cayman, Grand Cayman And Cayman Brac, British West Indies, In 1999 And 2000 (Part 1: Stony Corals And Algae), Carrie Manfrino, Bernhard Riegl, Jerome Lynn Hall, Robert Graifman
A benthic assessment of the isolated Cayman Islands was completed at 42 sites. Major changes in the reef community structure were documented by comparison with earlier studies. Acropora palmata and A. cervicornis, once abundant as shallow framework builders, were uncommon. Diseased stony corals were seen in >90% of the study sites, with the highest averages in Little Cayman, especially at Bloody Bay which is one of the most highly regulated marine parks in the Cayman Islands. The Montastraea annularis species complex accounted for two-thirds of the diseased corals which, along with other massive species, were affected largely by white-plague disease ...
Reefs And Coral Carpets In The Miocene Paratethys (Badenian, Leitha Limestone, Austria), 2016 Nova Southeastern University
Reefs And Coral Carpets In The Miocene Paratethys (Badenian, Leitha Limestone, Austria), Bernhard Riegl, W. E. Piller
Biohermal (reefs) and biostromal (coral carpets) facies were studied in the Austrian Middle Miocene Leitha Limestone. In the Vienna Basin ("Fenk quarry") non-framebuilding and framebuilding biostromal coral communities were found. In the Styrian Basin, well developed patch reefs were observed besides coral carpets. In the Fenk quarry, 2 coral carpet types, four non-framework coral communities, and one bivalve/coral community were found. In "Retznei quarry" (Styrian Basin) patch reefs, basal corallinacean calcarenites were followed by a Ponies layer capped by marl, and the main reef-building higher diversity phase dominated by faviids ( Montastraea, Tarbellastraea). In the "Tittenbacher quarry" no internal zonation ...
Red Sea Coral Reef Trajectories Over 2 Decades Suggest Increasing Community Homogenization And Decline In Coral Size, 2016 Nova Southeastern University
Red Sea Coral Reef Trajectories Over 2 Decades Suggest Increasing Community Homogenization And Decline In Coral Size, Bernhard Riegl, Andrew Bruckner, Gwilym Rowlands, Samuel J. Purkis, Philip Renaud
Three independent line intercept transect surveys on northern Red Sea reef slopes conducted in 1988/9 and 1997/8 in Egypt and from 2006–9 in Saudi Arabia were used to compare community patterns and coral size. Coral communities showed scale-dependent variability, highest at fine spatial and taxonomic scale (species-specific within and among reef patterns). At coarser scale (generic pattern across regions), patterns were more uniform (regionally consistent generic dominance on differently exposed reef slopes and at different depths). Neither fine- nor coarse-scale patterns aligned along the sampled 1700 km latitudinal gradient. Thus, a latitudinal gradient that had been described ...
Present Limits To Heat-Adaptability In Corals And Population-Level Responses To Climate Extremes, 2016 Nova Southeastern University
Present Limits To Heat-Adaptability In Corals And Population-Level Responses To Climate Extremes, Bernhard Riegl, Samuel J. Purkis, Ashraf S. Al-Cibahy, Mohammed A. Abdel-Moati, Ove Hoegh-Guldberg
Climate change scenarios suggest an increase in tropical ocean temperature by 1–3°C by 2099, potentially killing many coral reefs. But Arabian/Persian Gulf corals already exist in this future thermal environment predicted for most tropical reefs and survived severe bleaching in 2010, one of the hottest years on record. Exposure to 33–35°C was on average twice as long as in non-bleaching years. Gulf corals bleached after exposure to temperatures above 34°C for a total of 8 weeks of which 3 weeks were above 35°C. This is more heat than any other corals can survive ...
Rapid Recovery Of A Coral Reef At Darwin Island, Galapagos Islands, 2016 Columbia University
Rapid Recovery Of A Coral Reef At Darwin Island, Galapagos Islands, Adrienne M. S. Correa, Bernhard Riegl, Iliana B. Baums, Peter W. Glynn
Surveys at Darwin Island in 2006 and 2007 have demonstrated that this northernmost Galapagos Islands coral reef has recovered significantly since the 1982–3 El Niño event. When first surveyed in 1975, this structural reef exhibited actively accreting frameworks of pocilloporid and poritid corals. The coral suffered severe mortality in 1983, resulting in the near total loss of pocilloporids and extensive partial mortality of poritid corals. Large sections of the reef had not recovered by 1992 and dead frameworks were subject to bio-erosion, although small numbers of sexual recruits of pocilloporid corals and numerous recruits plus regenerating patches of Porites ...
Rapid Recovery Of A Coral Reef At Darwin Island, Galapagos Island, 2016 University of Miami, RSMAS
Rapid Recovery Of A Coral Reef At Darwin Island, Galapagos Island, Peter W. Glynn, Bernhard Riegl, Adrienne M. S. Correa, Iliana B. Baums
Surveys at Darwin Island in 2006 and 2007 have demonstrated that this northernmost Galapagos Islands coral reef has recovered significantly since the 1982-3 El Nino event. When first surveyed in 1975, this structural reef exhibited actively accreting frameworks of pocilloporid and poritid corals. The coral suffered severe mortality in 1983, resulting in the near total loss of pocilloporids and extensive partial mortality of poritid corals. Large sections of the reef had not recovered by 1992 and dead frameworks were subject to bio-erosion, although small numbers of sexual recruits of pocilloporid corals and numerous recruits plus regenerating patches of Porites lobata ...
Mapping Coral Reef Habitats In Southeast Florida Using A Combined Technique Approach, 2016 Nova Southeastern University
Mapping Coral Reef Habitats In Southeast Florida Using A Combined Technique Approach, Brian K. Walker, Bernhard Riegl, Richard E. Dodge
To create maps of nearshore benthic habitats of Broward County, Florida, from 0 to 35 m depth, we combined laser bathymetry, acoustic ground discrimination, subbottom profiling, and aerial photography data in a geographic information system (GIS). A mosaic of interpolated, sun-shaded, laser bathymetry data served as the foundation upon which acoustic ground discrimination, limited subbottom profiling and aerial photography, and groundtruthing data aided in interpretation of habitats. Mapping criteria similar to NOAA biogeographic Caribbean mapping were used to allow for a comparable output. Expert-driven visual interpretation outlined geomorphological features at a scale of 1 : 6000 with a minimum mapping unit ...
Mapping And Monitoring Of Coral Communities And Their Spatial Patterns Using A Surface-Based Video Method From A Vessel, 2016 Nova Southeastern University
Mapping And Monitoring Of Coral Communities And Their Spatial Patterns Using A Surface-Based Video Method From A Vessel, Bernhard Riegl, Jan L. Korrubel, Charles Martin
No Abstract Provided.
Human Impact On Atolls Leads To Coral Loss And Community Homogenisation: A Modeling Study, 2016 Nova Southeastern University
Human Impact On Atolls Leads To Coral Loss And Community Homogenisation: A Modeling Study, Bernhard Riegl, Charles R. C. Sheppard, Samuel J. Purkis
We explore impacts on pristine atolls subjected to anthropogenic near-field (human habitation) and far-field (climate and environmental change) pressure. Using literature data of human impacts on reefs, we parameterize forecast models to evaluate trajectories in coral cover under impact scenarios that primarily act via recruitment and increased mortality of larger corals. From surveys across the Chagos, we investigate the regeneration dynamics of coral populations distant from human habitation after natural disturbances. Using a size-based mathematical model based on a time-series of coral community and population data from 1999–2006, we provide hind- and forecast data for coral population dynamics within ...
Hermatypic Coral Fauna Of Subtropical Southeast Africa: A Checklist, 2016 University of Cape Town
Hermatypic Coral Fauna Of Subtropical Southeast Africa: A Checklist, Bernhard Riegl
The South African hermatypic coral fauna consists of 96 species in 42 scleractinian genera, one stoloniferous octocoral genus (Tubipora), and one hermatypic hydrocoral genus (Millepora). There are more species in southern Mozambique, with 151 species in 49 scleractinian genera, one stoloniferous octocoral (Tubipora musica L.), and one hydrocoral (Millepora exaesa [Forskal)). The eastern African coral faunas of Somalia, Kenya, Tanzania,
Mozambique, and South Africa are compared and Southeast Africa distinguished
as a biogeographic subregion, with six endemic species. Patterns of attenuation and species composition are described and compared with those on the eastern boundaries of the Indo-Pacific in the Pacific ...
Habitat Mapping In The Farasan Islands (Saudi Arabia) Using Casi And Quickbird Imagery, 2016 Nova Southeastern University
Habitat Mapping In The Farasan Islands (Saudi Arabia) Using Casi And Quickbird Imagery, Gwilym Rowlands, James A. Goodman, Bernhard Riegl, Philip Renaud, Samuel J. Purkis
Map products derived from remote sensing technology increase our understanding and ability to manage tropical marine environments. The enhanced mapping capabilities of hyperspectral sensors are well understood; yet technology uptake, particularly for large scale tasks, has been slow. The study presented represents one of the largest hyperspectral projects to date, and paves the way towards increased use of this technology. Hyperspectral CASI-550 imagery and multispectral QuickBird imagery, was acquired over 3,168 km2 of the Farasan Islands. In addition to the typical image processing steps, inopportune water condensation in the CASI sensors lens necessitated further processing to remove an across-track ...
Is Coral Community Structure Linked To Damage Susceptibility? A Case Study From South Africa, 2016 Institut fur Palaontologie der Universitat Wien
Is Coral Community Structure Linked To Damage Susceptibility? A Case Study From South Africa, Bernhard Riegl, Peter A. Cook
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 ...
Interpretation Of Single-Beam Acoustic Backscatter Using Lidar-Derived Topographic Complexity And Benthic Habitat Classifications In A Coral Reef Environment, Greg Foster, Brian K. Walker, Bernhard Riegl
Producing thematic coral reef benthic habitat maps from single-beam acoustic backscatter has been hindered by uncertainties in interpreting the acoustic energy parameters E1 (tail of 1st echo) and E2 (complete 2nd echo), typically limiting such maps to sediment classification schemes. In this study, acoustic interpretation was guided by high-resolution lidar (LIght Detection And Ranging) bathymetry. Each acoustic record, acquired from a BioSonics DT-X echosounder and multiplexed 38 and 418 kHz transducers, was paired with a spatially-coincident value of a lidar-derived proxy for topographic complexity, reef-volume (RV), and its membership to one of eight benthic habitat classes, delineated from lidar imagery ...
Fractal Patterns Of Coral Communities: Evidence From Remote Sensing (Arabian Gulf, Dubai, U.A.E.), 2016 Nova Southeastern University
Fractal Patterns Of Coral Communities: Evidence From Remote Sensing (Arabian Gulf, Dubai, U.A.E.), Samuel J. Purkis, Bernhard Riegl, Richard E. Dodge (Editor)
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 ...