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- Gulf of Mexico (12)
- Animals (7)
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- Oil spills (3)
- Perciformes (3)
- Petroleum (3)
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- Ecosystem (2)
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- Fish (2)
- Geography (2)
- Hydrocarbons (2)
- MODIS (2)
- Metabolites (2)
- Naphthalene (2)
- Oceanography (2)
- Remote sensing (2)
- Sediment (2)
- Sound Spectrography (2)
- Urophycis (2)
- Vocalization (2)
- Vocalization, Animal (2)
- Water Pollutants, Chemical (2)
- Acoustic signals (1)
- Acoustics (1)
- Air-sea interactions (1)
- Analysis of Variance (1)
Articles 31 - 59 of 59
Full-Text Articles in Life Sciences
Automated Classification Of Dolphin Echolocation Click Types From The Gulf Of Mexico, Kaitlin E. Fraiser, Marie A. Roch, Melissa S. Soldevilla, Lance P. Garrison, John A. Hildebrand
Automated Classification Of Dolphin Echolocation Click Types From The Gulf Of Mexico, Kaitlin E. Fraiser, Marie A. Roch, Melissa S. Soldevilla, Lance P. Garrison, John A. Hildebrand
C-IMAGE Publications
Delphinids produce large numbers of short duration, broadband echolocation clicks which may be useful for species classification in passive acoustic monitoring efforts. A challenge in echolocation click classification is to overcome the many sources of variability to recognize underlying patterns across many detections. An automated unsupervised network-based classification method was developed to simulate the approach a human analyst uses when categorizing click types: Clusters of similar clicks were identified by incorporating multiple click characteristics (spectral shape and inter-click interval distributions) to distinguish within-type from between-type variation, and identify distinct, persistent click types. Once click types were established, an algorithm for …
Species-Specific Metabolism Of Naphthalene And Phenanthrene In 3 Species Of Marine Teleosts Exposed To Deepwater Horizon Crude Oil, Erin Pulster, Kevan Main, Dana Wetzel, Steven Murawski
Species-Specific Metabolism Of Naphthalene And Phenanthrene In 3 Species Of Marine Teleosts Exposed To Deepwater Horizon Crude Oil, Erin Pulster, Kevan Main, Dana Wetzel, Steven Murawski
C-IMAGE Publications
The 2 most abundant polycyclic aromatic hydrocarbons (PAHs) measured in Deepwater Horizon crude oil, naphthalene and phenanthrene, and their associated homologs have both been shown to be acutely toxic in fish. Although fish have a relatively high metabolic capacity for PAHs, hydroxylated PAH (OH-PAH) derivatives formed during the initial metabolic response can negatively impact the health of fish. Species-specific metabolism of naphthalene and phenanthrene was evaluated in 3 marine teleosts, red drum (Scianops ocellatus), Florida pompano (Trachinotus carolinus), and southern flounder (Paralichthys lethostigma). Fish were exposed to Deepwater Horizon crude oil by intraperitoneal injections at time 0 and 48 h, …
Predicting The Consequence Of Natural And Chemical Dispersion For Oil Slick Size Over Time, Marieke Zeinstra-Helfrich, Wierd Koops, Albertinka Murk
Predicting The Consequence Of Natural And Chemical Dispersion For Oil Slick Size Over Time, Marieke Zeinstra-Helfrich, Wierd Koops, Albertinka Murk
C-IMAGE Publications
Application of dispersants aims to enhance the natural dispersion process in order to reduce the size of the slick and the amount of oil at the surface. This study presents an approach for modeling the development of the surface oil slick as a function of the wind speed, oil viscosity, and dispersant application. We modeled the oil slick mass distribution across a transect through the slick over time taking into account the continuous entrainment of oil, resurfacing process of the different oil droplet size classes and horizontal transport. Outcomes show distinctively different oil slick features, depending on how favorable conditions …
Linkage Mapping And Comparative Genomics Of Red Drum (Sciaenops Ocellatus) Using Next-Generation Sequencing, Christopher M. Hollenbeck, David S. Portnoy, Dana Wetzel, Tracy A. Sherwood, Paul B. Samollow, John R. Gold
Linkage Mapping And Comparative Genomics Of Red Drum (Sciaenops Ocellatus) Using Next-Generation Sequencing, Christopher M. Hollenbeck, David S. Portnoy, Dana Wetzel, Tracy A. Sherwood, Paul B. Samollow, John R. Gold
C-IMAGE Publications
Developments in next-generation sequencing allow genotyping of thousands of genetic markers across hundreds of individuals in a cost-effective manner. Because of this, it is now possible to rapidly produce dense genetic linkage maps for nonmodel species. Here, we report a dense genetic linkage map for red drum, a marine fish species of considerable economic importance in the southeastern United States and elsewhere. We used a prior microsatellite-based linkage map as a framework and incorporated 1794 haplotyped contigs derived from high-throughput, reduced representation DNA sequencing to produce a linkage map containing 1794 haplotyped restriction-site associated DNA (RAD) contigs, 437 anonymous microsatellites, …
Experimental Assessment Of Lionfish Removals To Mitigate Reef Fish Community Shifts On Northern Gulf Of Mexico Artificial Reefs, Kristin A. Dahl, William F. Patterson Iii, Richard A. Synder
Experimental Assessment Of Lionfish Removals To Mitigate Reef Fish Community Shifts On Northern Gulf Of Mexico Artificial Reefs, Kristin A. Dahl, William F. Patterson Iii, Richard A. Synder
C-IMAGE Publications
Substantial declines in reef fishes were observed at northern Gulf of Mexico artificial reef sites between 2009−2010 and 2011−2012, a period that bracketed the appearance of invasive lionfish in this ecosystem. Small demersal reef fishes, the predominant prey of lionfish in other systems, displayed the greatest declines. However, a confounding factor during this time was the Deepwater Horizon Oil Spill (DWH) in summer 2010. In some areas, targeted lionfish removals have been demonstrated to mitigate negative effects on native fishes. Therefore, we conducted a 2 yr experiment to examine the effectiveness and ecological benefits of targeted lionfish removals at artificial …
Responses Of Microbial Communities To Hydrocarbon Exposures, Samantha B. Joye, Sara Kleindienst, Jack A. Gilbert, Kim M. Handley, Pamela Weisenhorn, Will A. Overholt, Joel E. Kostka
Responses Of Microbial Communities To Hydrocarbon Exposures, Samantha B. Joye, Sara Kleindienst, Jack A. Gilbert, Kim M. Handley, Pamela Weisenhorn, Will A. Overholt, Joel E. Kostka
C-IMAGE Publications
The responses of microbial communities to hydrocarbon exposures are complex and variable, driven to a large extent by the nature of hydrocarbon infusion, local environmental conditions, and factors that regulate microbial physiology (e.g., substrate and nutrient availability). Although present at low abundance in the ocean, hydrocarbon-degrading seed populations are widely distributed, and they respond rapidly to hydrocarbon inputs at natural and anthropogenic sources. Microbiomes from environments impacted by hydrocarbon discharge may appear similar at a higher taxonomic rank (e.g., genus level) but diverge at increasing phylogenetic resolution (e.g., sub-OTU [operational taxonomic unit] levels). Such subtle changes are detectable by computational …
How Did The Deepwater Horizon Oil Spill Impact Deep-Sea Ecosystems?, Charles R. Fisher, Paul A. Montagna, Tracey T. Sutton
How Did The Deepwater Horizon Oil Spill Impact Deep-Sea Ecosystems?, Charles R. Fisher, Paul A. Montagna, Tracey T. Sutton
C-IMAGE Publications
Approximately 90% of the volume of the Gulf of Mexico is contained in water deeper than 200 m, a region where the Deepwater Horizon (DWH) blowout had more impact on ecosystems than any previous oil spill. The remoteness and relative inaccessibility of the deep sea makes documenting even acute impacts to the animals that live in this realm difficult. This article reviews Natural Resource Damage Assessment studies and follow-up work funded as part of the Gulf of Mexico Research Initiative that targeted deepwater pelagic and benthic fauna. Oil was incorporated into the pelagic food web, and a reduction in planktonic …
How Do Oil, Gas, And Water Interact Near A Subsea Blowout?, Scott A. Socolofsky, E. Eric Adams, Claire B. Paris-Limouzy, Di Yang
How Do Oil, Gas, And Water Interact Near A Subsea Blowout?, Scott A. Socolofsky, E. Eric Adams, Claire B. Paris-Limouzy, Di Yang
C-IMAGE Publications
Oil and gas from a subsea blowout shatter into droplets and bubbles that rise through the water column, entraining ambient seawater and forming a plume. Local density stratification and currents eventually arrest this rising plume, and the entrained water, enriched with dissolved hydrocarbons and some of the smaller oil droplets, forms one or more subsurface intrusion layers. Beyond the plume and intrusion layer(s), droplets and bubbles advect and diffuse by local currents and dissolve and biodegrade as they rise to the surface, where they are transported by wind and waves. These processes occur over a wide range of length scales …
Methods Of Oil Detection In Response To The Deepwater Horizon Oil Spill, Helen K. White, Robyn N. Conmy, Ian R. Macdonald, Christopher M. Reddy
Methods Of Oil Detection In Response To The Deepwater Horizon Oil Spill, Helen K. White, Robyn N. Conmy, Ian R. Macdonald, Christopher M. Reddy
C-IMAGE Publications
Detecting oil in the northern Gulf of Mexico following the Deepwater Horizon oil spill presented unique challenges due to the spatial and temporal extent of the spill and the subsequent dilution of oil in the environment. Over time, physical, chemical, and biological processes altered the composition of the oil, further complicating its detection. Reservoir fluid, containing gas and oil, released from the Macondo well was detected in surface and subsurface environments. Oil monitoring during and after the spill required a variety of technologies, including nimble adaptation of techniques developed for non-oil-related applications. The oil detection technologies employed varied in sensitivity, …
Chemical Composition Of Macondo And Other Crude Oils And Compositional Alterations During Oil Spills, Edward B. Overton, Terry L. Wade, Jagoš R. Radović, Buffy M. Meyer, M. Scott Miles, Stephen R. Larter
Chemical Composition Of Macondo And Other Crude Oils And Compositional Alterations During Oil Spills, Edward B. Overton, Terry L. Wade, Jagoš R. Radović, Buffy M. Meyer, M. Scott Miles, Stephen R. Larter
C-IMAGE Publications
Crude oils are some of the most complex and diverse organic mixtures found in nature. They contain thousands of different compounds belonging to several compound classes, with the main ones being hydrocarbons and their heteroatom (N, S, and O)-containing analogs, called non-hydrocarbons. In general, all crude oils contain the same types of chemical structures, but these compounds can be in highly variable proportions in crude oils drawn from different reservoir conditions and locations. Both the types of compounds and their respective quantities change rapidly once the crude oil is spilled into the environment, making the circumstances associated with every spill …
Weathering Of Oil Spilled In The Marine Environment, Matthew A. Tarr, Phoebe Zito, Edward B. Overton, Gregory M. Olson, Puspa L. Adhikari, Christopher M. Reddy
Weathering Of Oil Spilled In The Marine Environment, Matthew A. Tarr, Phoebe Zito, Edward B. Overton, Gregory M. Olson, Puspa L. Adhikari, Christopher M. Reddy
C-IMAGE Publications
Crude oil is a complex mixture of many thousands of mostly hydrocarbon and nitrogen-, sulfur-, and oxygen-containing compounds with molecular weights ranging from below 70 Da to well over 2,000 Da. When this complex mixture enters the environment from spills, ruptures, blowouts, or seeps, it undergoes a continuous series of compositional changes that result from a process known as weathering. Spills of petroleum involving human activity generally result in more rapid input of crude oil or refined products (diesel, gasoline, heavy fuel oil, and diluted bitumens) to the marine system than do natural processes and urban runoffs. The primary physicochemical …
Refinement Of The Critical Angle Calculation For The Contrast Reversal Of Oil Slicks Under Sunglint, Yingcheng Lu, Shaojie Sun, Minwei Zhang, Brock Murch, Chuanmin Hu
Refinement Of The Critical Angle Calculation For The Contrast Reversal Of Oil Slicks Under Sunglint, Yingcheng Lu, Shaojie Sun, Minwei Zhang, Brock Murch, Chuanmin Hu
C-IMAGE Publications
It has long been observed that oil slicks under sunglint can reverse their optical contrast against nearby oil‐free seawater. Such a phenomenon has been described through both empirical statistical analysis of the sunglint strength and modeled theoretically using a critical angle concept. The critical angle, in this model, is the angle at which the image pixels show no or negligible contrast between oiled and nonoiled seawater. Pixels away from this critical angle show either positive or negative contrast from the oil‐free pixels. Although this concept has been fully demonstrated in the published literature, its calculation needs to be further refined …
How Did The Deepwater Horizon Oil Spill Impact Deep-Sea Ecosystems?, Charles R. Fisher, Paul A. Montagna, Tracey Sutton
How Did The Deepwater Horizon Oil Spill Impact Deep-Sea Ecosystems?, Charles R. Fisher, Paul A. Montagna, Tracey Sutton
C-IMAGE Publications
Approximately 90% of the volume of the Gulf of Mexico is contained in water deeper than 200 m, a region where the Deepwater Horizon (DWH) blowout had more impact on ecosystems than any previous oil spill. The remoteness and relative inaccessibility of the deep sea makes documenting even acute impacts to the animals that live in this realm difficult. This article reviews Natural Resource Damage Assessment studies and follow-up work funded as part of the Gulf of Mexico Research Initiative that targeted deepwater pelagic and benthic fauna. Oil was incorporated into the pelagic food web, and a reduction in planktonic …
Gulf Of Mexico Low-Frequency Ocean Soundscape Impacted By Airguns, Sean M. Wiggins, Jesse M. Hall, Bruce J. Thayre, John A. Hildebrand
Gulf Of Mexico Low-Frequency Ocean Soundscape Impacted By Airguns, Sean M. Wiggins, Jesse M. Hall, Bruce J. Thayre, John A. Hildebrand
C-IMAGE Publications
The ocean soundscape of the Gulf of Mexico (GOM) has not been well-studied, although it is an important habitat for marine mammals, including sperm and beaked whales, many dolphin species, and a potentially endangered baleen whale species. The GOM is also home to high levels of hydrocarbon exploration and extraction, heavily used commercial shipping ports, and significant fishery industry activity, all of which are known contributors to oceanic noise. From 2010–2013, the soundscape of three deep and two shallow water sites in the GOM were monitored over 10 – 1000 Hz. Average sound pressure spectrum levels were high, > 90 dB …
Sun Glint Requirement For The Remote Detection Of Surface Oil Films, Shaojie Sun, Chuanmin Hu
Sun Glint Requirement For The Remote Detection Of Surface Oil Films, Shaojie Sun, Chuanmin Hu
C-IMAGE Publications
Natural oil slicks in the western Gulf of Mexico are used to determine the sun glint threshold required for optical remote sensing of oil films. The threshold is determined using the same‐day image pairs collected by Moderate Resolution Imaging Spectroradiometer (MODIS) Terra (MODIST), MODIS Aqua (MODISA), and Visible Infrared Imaging Radiometer Suite (VIIRS) (N = 2297 images) over the same oil slick locations where at least one of the sensors captures the oil slicks. For each sensor, statistics of sun glint strengths, represented by the normalized glint reflectance (L GN, sr−1), when oil slicks can and cannot be …
Passive Acoustic Monitoring Of Beaked Whale Densities In The Gulf Of Mexico, John A. Hildebrand, Simone Baumann-Pickering, Kaitlin E. Frasier, Jennifer S. Trickey, Karlina P. Merkens, Sean M. Wiggins, Mark A. Mcdonald, Lance P. Garrison, Danielle Harris, Tiago A. Marques, Len Thomas
Passive Acoustic Monitoring Of Beaked Whale Densities In The Gulf Of Mexico, John A. Hildebrand, Simone Baumann-Pickering, Kaitlin E. Frasier, Jennifer S. Trickey, Karlina P. Merkens, Sean M. Wiggins, Mark A. Mcdonald, Lance P. Garrison, Danielle Harris, Tiago A. Marques, Len Thomas
C-IMAGE Publications
Beaked whales are deep diving elusive animals, difficult to census with conventional visual surveys. Methods are presented for the density estimation of beaked whales, using passive acoustic monitoring data collected at sites in the Gulf of Mexico (GOM) from the period during and following the Deepwater Horizon oil spill (2010-2013). Beaked whale species detected include: Gervais' (Mesoplodon europaeus), Cuvier's (Ziphius cavirostris), Blainville's (Mesoplodon densirostris) and an unknown species of Mesoplodon sp. (designated as Beaked Whale Gulf - BWG). For Gervais' and Cuvier's beaked whales, we estimated weekly animal density using two methods, one based on the number of echolocation clicks, …
Detection Of Floating Oil Anomalies From The Deepwater Horizon Oil Spill With Synthetic Aperture Radar, Oscar Garcia-Pineda, Ian Macdonald, Chuanmin Hu, Jan Svejkovsky, Mark Hess, Dmitry Dukhovskoy, Steven L. Morey
Detection Of Floating Oil Anomalies From The Deepwater Horizon Oil Spill With Synthetic Aperture Radar, Oscar Garcia-Pineda, Ian Macdonald, Chuanmin Hu, Jan Svejkovsky, Mark Hess, Dmitry Dukhovskoy, Steven L. Morey
C-IMAGE Publications
Detection of oil floating on the ocean surface, and particularly thick layers of it, is crucial for emergency response to oil spills. While detection of oil on the ocean surface is possible under moderate sea-state conditions using a variety of remote-sensing methods, estimation of oil layer thickness is technically challenging. In this paper, we used synthetic aperture radar (SAR) imagery collected during the Deepwater Horizon oil spill and the Texture Classifier Neural Network Algorithm (TCNNA) to identify the spill’s extent. We then developed an oil emulsion detection algorithm using TCNNA outputs to enhance the contrast of pixels within the oil …
Draft Genome Sequence Of The Piezotolerant And Crude Oil-Degrading Bacterium Rhodococcus Qingshengii Strain Tuhh-12, Sara A. Lincoln, Trinity L. Hamilton, Ana Gabriela Valladares Juárez, Martina Schedler, Jennifer L. Macalady, Rudolf Müller, Katherine H. Freeman
Draft Genome Sequence Of The Piezotolerant And Crude Oil-Degrading Bacterium Rhodococcus Qingshengii Strain Tuhh-12, Sara A. Lincoln, Trinity L. Hamilton, Ana Gabriela Valladares Juárez, Martina Schedler, Jennifer L. Macalady, Rudolf Müller, Katherine H. Freeman
C-IMAGE Publications
We report here the draft genome sequence of Rhodococcus qingshengii strain TUHH-12. The ability of this piezotolerant bacterium to grow on crude oil and tetracosane as sole carbon sources at 150 × 10(5) Pa makes it useful in studies of hydrocarbon degradation under simulated deep-sea conditions.
A Decline In Benthic Foraminifera Following The Deepwater Horizon Event In The Northeastern Gulf Of Mexico, Patrick Schwing, Isabel Romero, Gregg R. Brooks, David Hastings, Rebekka A. Larson, David Hollander
A Decline In Benthic Foraminifera Following The Deepwater Horizon Event In The Northeastern Gulf Of Mexico, Patrick Schwing, Isabel Romero, Gregg R. Brooks, David Hastings, Rebekka A. Larson, David Hollander
C-IMAGE Publications
Sediment cores were collected from three sites (1000–1200 m water depth) in the northeastern Gulf of Mexico from December 2010 to June 2011 to assess changes in benthic foraminiferal density related to the Deepwater Horizon (DWH) event (April-July 2010, 1500 m water depth). Short-lived radioisotope geochronologies (210Pb, 234Th), organic geochemical assessments, and redox metal concentrations were determined to relate changes in sediment accumulation rate, contamination, and redox conditions with benthic foraminiferal density. Cores collected in December 2010 indicated a decline in density (80–93%). This decline was characterized by a decrease in benthic foraminiferal density and benthic foraminiferal …
Ocean Currents Generate Large Footprints In Marine Palaeoclimate Proxies, Erik Van Sebille, Paolo Scussolini, Jonathan V. Durgadoo, Frank J. C. Peeters, Arne Biastoch, Wilbert Weijer, Chris Turney, Claire B. Paris, Rainer Zahn
Ocean Currents Generate Large Footprints In Marine Palaeoclimate Proxies, Erik Van Sebille, Paolo Scussolini, Jonathan V. Durgadoo, Frank J. C. Peeters, Arne Biastoch, Wilbert Weijer, Chris Turney, Claire B. Paris, Rainer Zahn
C-IMAGE Publications
Fossils of marine microorganisms such as planktic foraminifera are among the cornerstones of palaeoclimatological studies. It is often assumed that the proxies derived from their shells represent ocean conditions above the location where they were deposited. Planktic foraminifera, however, are carried by ocean currents and, depending on the life traits of the species, potentially incorporate distant ocean conditions. Here we use high-resolution ocean models to assess the footprint of planktic foraminifera and validate our method with proxy analyses from two locations. Results show that foraminifera, and thus recorded palaeoclimatic conditions, may originate from areas up to several thousands of kilometres …
An Atlantis Ecosystem Model For The Gulf Of Mexico Supporting Integrated Ecosystem Assessment, Cameron Ainsworth, Michael Schirripa, Hem Nalini Morzaria-Luna
An Atlantis Ecosystem Model For The Gulf Of Mexico Supporting Integrated Ecosystem Assessment, Cameron Ainsworth, Michael Schirripa, Hem Nalini Morzaria-Luna
C-IMAGE Publications
"The Gulf of Mexico supports a high biological diversity and biomass of fish, seabirds, and mammals; in this region, multiple commercial and recreational fishing fleets operate providing economic resources for local populations. The Gulf is also the site of important oil and gas production and tourism. As a result of intensive human use, the Gulf is subject to various impacts, including oil spills, habitat degradation, and anoxia. Management of this Large Marine Ecosystem requires an ecosystem-based management approach that provides a holistic approach to resource management. The Gulf of Mexico is managed as part of NOAA's Integrated Ecosystem Assessment Program …
Enhancing The Ocean Observing System To Meet Restoration Challenges In The Gulf Of Mexico, Steven Murawski, William T. Hogarth
Enhancing The Ocean Observing System To Meet Restoration Challenges In The Gulf Of Mexico, Steven Murawski, William T. Hogarth
C-IMAGE Publications
As a result of fines and penalties generated by the settlement of civil and criminal actions and the Natural Resource Damage Assessment and Restoration (NRDAR) claims resulting from the Deepwater Horizon (DWH) incident, various entities are poised to receive billions of dollars to improve the health and resilience of the Gulf of Mexico large marine ecosystem. While much of the funding will go to economic development in states impacted by the oil spill, the lion’s share will be used to restore specific natural resources damaged as a result of DWH and to tackle larger and more chronic environmental issues such …
Lethal And Sublethal Effects Of Oil, Chemical Dispersant, And Dispersed Oil On The Ctenophore Mnemiopsis Leidyi, Ryan F. Peiffer, Jonathan H. Cohen
Lethal And Sublethal Effects Of Oil, Chemical Dispersant, And Dispersed Oil On The Ctenophore Mnemiopsis Leidyi, Ryan F. Peiffer, Jonathan H. Cohen
C-IMAGE Publications
We established the lethal levels for water-accommodated fractions of Corexit® 9500A chemical dispersant, crude oil (WAF), and dispersed crude oil (CEWAF) for the ctenophore Mnemiopsis leidyi at both 15 and 23°C. This gelatinous zooplankter was sensitive to dispersant at both temperatures, as well as to oil solutions, with some increase in toxicity of CEWAF as compared to WAF. Subsequent sublethal assays for routine respiration rate, bioluminescence, and glutathione-s-transferase (GST) activity were conducted on individuals surviving 24 h exposures to test solutions at both 15 and 23°C. GST activity increased significantly in 2.5 and 5 mg l-1 dispersant solutions …
Effect Of High Pressure On Hydrocarbon-Degrading Bacteria, Martina Schedler, Robert Hiessl, Ana Gabriela Valladares Juárez, Giselher Gust, Rudolf Müller
Effect Of High Pressure On Hydrocarbon-Degrading Bacteria, Martina Schedler, Robert Hiessl, Ana Gabriela Valladares Juárez, Giselher Gust, Rudolf Müller
C-IMAGE Publications
The blowout of the Deepwater Horizon in the Gulf of Mexico in 2010 occurred at a depth of 1500 m, corresponding to a hydrostatic pressure of 15 MPa. Up to now, knowledge about the impact of high pressure on oil-degrading bacteria has been scarce. To investigate how the biodegradation of crude oil and its components is influenced by high pressures, like those in deep-sea environments, hydrocarbon degradation and growth of two model strains were studied in high-pressure reactors. The alkane-degrading strain Rhodococcus qingshengii TUHH-12 grew well on n-hexadecane at 15 MPa at a rate of 0.16 h(-1), although slightly slower …
A Rapid Response Study Of The Hercules Gas Well Blowout, Samantha Joye, Joseph P. Montoya, Steven Murawski, Tamay Özgökmen, Terry L. Wade, Raffaele Montuoro, Brian J. Roberts, David Hollander, Wade H Jeffrey, Jeffrey Chanton
A Rapid Response Study Of The Hercules Gas Well Blowout, Samantha Joye, Joseph P. Montoya, Steven Murawski, Tamay Özgökmen, Terry L. Wade, Raffaele Montuoro, Brian J. Roberts, David Hollander, Wade H Jeffrey, Jeffrey Chanton
C-IMAGE Publications
On 20 April 2010, the Deepwater Horizon drilling rig lost well control while drilling at the Macondo prospect in the Gulf of Mexico. At the time of the Macondo blowout, the academic scientific community was ill prepared to initiate and rapidly conduct the necessary coordinated interdisciplinary studies of the environments around the discharge area.
Habitat-Specific Density And Diet Of Rapidly Expanding Invasive Red Lionfish, Pterois Volitans,, Populations In The Northern Gulf Of Mexico, Kristen A. Dahl, William F. Patterson Iii
Habitat-Specific Density And Diet Of Rapidly Expanding Invasive Red Lionfish, Pterois Volitans,, Populations In The Northern Gulf Of Mexico, Kristen A. Dahl, William F. Patterson Iii
C-IMAGE Publications
Invasive Indo-Pacific red lionfish, Pterois volitans, were first reported in the northern Gulf of Mexico (nGOM) in summer 2010. To examine potential impacts on native reef fish communities, lionfish density and size distributions were estimated from fall 2010 to fall 2013 with a remotely operated vehicle at natural (n = 16) and artificial (n = 22) reef sites. Lionfish (n = 934) also were sampled via spearfishing to examine effects of habitat type, season, and fish size on their diet and trophic ecology. There was an exponential increase in lionfish density at both natural and artificial reefs over the study …
Prevalence Of External Skin Lesions And Polycyclic Aromatic Hydrocarbon Concentrations In Gulf Of Mexico Fishes, Post-Deepwater Horizon, Steven Murawski, William T. Hogarth, Ernst B. Peebles, Luiz Barbeiri
Prevalence Of External Skin Lesions And Polycyclic Aromatic Hydrocarbon Concentrations In Gulf Of Mexico Fishes, Post-Deepwater Horizon, Steven Murawski, William T. Hogarth, Ernst B. Peebles, Luiz Barbeiri
C-IMAGE Publications
We surveyed offshore fish populations in the Gulf of Mexico in 2011 and 2012, following persistent reports of abnormal skin lesions and other pathologies in the aftermath of the Deepwater Horizon oil spill. The incidence of skin lesions in 2011 sampling was most frequent in some bottom-dwelling species along the continental shelf edge north of the Deepwater Horizon site. Longline surveys revealed that by 2012 the overall frequency of lesions in northern Gulf of Mexico (NGM) fishes in the vicinity of the Deepwater Horizon had declined 53%, with severity also declining. Relatively high concentrations of polycyclic aromatic hydrocarbon (PAH) metabolites …
Generalized Additive Models Used To Predict Species Abundance In The Gulf Of Mexico: An Ecosystem Modeling Tool, Michael Drexler, Cameron H. Ainsworth
Generalized Additive Models Used To Predict Species Abundance In The Gulf Of Mexico: An Ecosystem Modeling Tool, Michael Drexler, Cameron H. Ainsworth
C-IMAGE Publications
Spatially explicit ecosystem models of all types require an initial allocation of biomass, often in areas where fisheries independent abundance estimates do not exist. A generalized additive modelling (GAM) approach is used to describe the abundance of 40 species groups (i.e. functional groups) across the Gulf of Mexico (GoM) using a large fisheries independent data set (SEAMAP) and climate scale oceanographic conditions. Predictor variables included in the model are chlorophyll a, sediment type, dissolved oxygen, temperature, and depth. Despite the presence of a large number of zeros in the data, a single GAM using a negative binomial distribution was suitable …
Optical Contrast Of Oil Dispersed In Seawater Under Windy Conditions, Z. Otremba, O. Zielinski, Chuanmin Hu
Optical Contrast Of Oil Dispersed In Seawater Under Windy Conditions, Z. Otremba, O. Zielinski, Chuanmin Hu
C-IMAGE Publications
Oil pollution of natural waters represents a serious threat for aquatic ecosystems, and the assessment of the degree of pollution requiresmeasurement strategies including remote sensing and modeling. While surface oil pollution is relatively easy to detect with radar or opticalremote sensing, underwater oil emulsions can only be detected using visible light as an information carrier. Here the Michelson contrast ofsea area polluted by an oil-in-water emulsion under various wind conditions is simulated through Monte-Carlo modeling. The results showthe premise for optimal direction of observations in which the possibility of detecting the emulsified oil is maximized.