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Full-Text Articles in Life Sciences
A Synthesis Of Deepwater Horizon Impacts On Coastal And Nearshore Living Marine Resources, Steven A. Murawski, Joshua P. Kilborn, Adriana C. Bejarano, David Chagaris, David Donaldson, Frank J. Hernandez, Timothy C. Macdonald, Craig Newton, Ernst Peebles, Kelly L. Robinson
A Synthesis Of Deepwater Horizon Impacts On Coastal And Nearshore Living Marine Resources, Steven A. Murawski, Joshua P. Kilborn, Adriana C. Bejarano, David Chagaris, David Donaldson, Frank J. Hernandez, Timothy C. Macdonald, Craig Newton, Ernst Peebles, Kelly L. Robinson
Marine Science Faculty Publications
The 2010 Deepwater Horizon (DWH) oil blowout in the Gulf of Mexico began on April 20, originating in the deep sea 66 km off the Louisiana coast. By early June, DWH oil had spread to coastal Louisiana, Mississippi, Alabama and western Florida. An estimated 2,113 km of shoreline were oiled, making DWH the largest marine oil spill in global history by length of affected shoreline. Additionally, a series of oil spill response measures were deployed, including diversions of Mississippi River discharge to forestall oil coming ashore, and the establishment of large-scale fishery closures, with both affecting coastal resources to varying …
The Expanded Footprint Of The Deepwater Horizon Oil Spill In The Gulf Of Mexico Deep-Sea Benthos, Michael G. Reuscher, Jeffrey G. Baguley, Paul A. Montagna
The Expanded Footprint Of The Deepwater Horizon Oil Spill In The Gulf Of Mexico Deep-Sea Benthos, Michael G. Reuscher, Jeffrey G. Baguley, Paul A. Montagna
C-IMAGE Publications
The 2010 Deepwater Horizon blowout off the coast of Louisiana caused the largest marine oil spill on record. Samples were collected 2–3 months after the Macondo well was capped to assess damage to macrofauna and meiofauna communities. An earlier analysis of 58 stations demonstrated severe and moderate damage to an area of 148 km2. An additional 58 archived stations have been analyzed to enhance the resolution of that assessment and determine if impacts occurred further afield. Impacts included high levels of total petroleum hydrocarbons (TPH) and polycyclic aromatic hydrocarbons (PAH) in the sediment, low diversity, low evenness, and …
The Southern Gulf Of Mexico: A Baseline Radiocarbon Isoscape Of Surface Sediments And Isotopic Excursions At Depth, Samantha H Bosman, Patrick Schwing, Rebekka A. Larson, Natalie E. Wildermann, Gregg R. Brooks, Isabel Romero, Joan-Albert Sanchez-Cabeza, Ana Carolina Ruiz-Fernández, Maria Luisa Machain-Castillo, Adolfo Gracia, Elva Escobar-Briones, Steven Murawski, David Hollander, Jeffrey P. Chanton
The Southern Gulf Of Mexico: A Baseline Radiocarbon Isoscape Of Surface Sediments And Isotopic Excursions At Depth, Samantha H Bosman, Patrick Schwing, Rebekka A. Larson, Natalie E. Wildermann, Gregg R. Brooks, Isabel Romero, Joan-Albert Sanchez-Cabeza, Ana Carolina Ruiz-Fernández, Maria Luisa Machain-Castillo, Adolfo Gracia, Elva Escobar-Briones, Steven Murawski, David Hollander, Jeffrey P. Chanton
C-IMAGE Publications
The southern Gulf of Mexico (sGoM) is home to an extensive oil recovery and development infrastructure. In addition, the basin harbors sites of submarine hydrocarbon seepage and receives terrestrial inputs from bordering rivers. We used stable carbon, nitrogen, and radiocarbon analyses of bulk sediment organic matter to define the current baseline isoscapes of surface sediments in the sGoM and determined which factors might influence them. These baseline surface isoscapes will be useful for accessing future environmental impacts. We also examined the region for influence of hydrocarbon deposition in the sedimentary record that might be associated with hydrocarbon recovery, spillage and …
Chronic Pah Exposures And Associated Declines In Fish Health Indices Observed For Ten Grouper Species In The Gulf Of Mexico, Erin Pulster, Adolfo Gracia, Maickel Armenteros, Brigid Carr, Justin Mrowicki, Steven Murawski
Chronic Pah Exposures And Associated Declines In Fish Health Indices Observed For Ten Grouper Species In The Gulf Of Mexico, Erin Pulster, Adolfo Gracia, Maickel Armenteros, Brigid Carr, Justin Mrowicki, Steven Murawski
C-IMAGE Publications
Ten grouper species grouper (n = 584) were collected throughout the Gulf of Mexico (GoM) from 2011 through 2017 to provide information on hepatobiliary polycyclic aromatic hydrocarbon (PAH) concentrations in the aftermath of the Deepwater Horizon (DWH) oil spill. Liver and bile samples were analyzed for PAHs and their metabolites using triple quadrupole mass spectrometry (GC/MS/MS) and high-performance liquid chromatography with fluorescence detection (HPLC-F), respectively. Data were compared among species and sub-regions of the GoM to understand spatiotemporal exposure dynamics in these economically and ecologically important species. Significant differences in the composition and concentrations of PAHs were detected spatially, …
Hepatobiliary Analyses Suggest Chronic Pah Exposure In Hakes (Urophycis Spp.) Following The Deepwater Horizon Oil Spill, Rachel E. Struch, Erin Pulster, Andrea D. Schreier, Steven A. Murawski
Hepatobiliary Analyses Suggest Chronic Pah Exposure In Hakes (Urophycis Spp.) Following The Deepwater Horizon Oil Spill, Rachel E. Struch, Erin Pulster, Andrea D. Schreier, Steven A. Murawski
C-IMAGE Publications
Prior to the Deepwater Horizon oil spill, we lacked a comprehensive baseline of oil contamination in the Gulf of Mexico's sediments, water column, and biota. Gaps in prespill knowledge limit our ability to determine the aftereffects of the Deepwater Horizon blowout or prepare to mitigate similar impacts during future oil spill disasters. We examined spatiotemporal differences in exposure to and metabolism of polycyclic aromatic hydrocarbons (PAHs) in 2 hake species (Urophycis spp.) to establish a current baseline for these ecologically important, abundant, and at-risk demersal fishes. Gulf hake (Urophycis cirrata) and southern hake (Urophycis floridana) were collected throughout the Gulf …
Improving The Integration Of Restoration And Conservation In Marine And Coastal Ecosystems: Lessons From The Deepwater Horizon Disaster, Richard L. Wallace, Gilbert Gilbert, John E. Reynolds Iii
Improving The Integration Of Restoration And Conservation In Marine And Coastal Ecosystems: Lessons From The Deepwater Horizon Disaster, Richard L. Wallace, Gilbert Gilbert, John E. Reynolds Iii
C-IMAGE Publications
In the wake of the Deepwater Horizon disaster, much has been learned about the biological, ecological, physical, and chemical conditions of the Gulf of Mexico. In parallel, the research community has also gained insight about the social and organizational structures and processes necessary for oil spill response and subsequent marine and coastal restoration. However, even with these lessons from both the Deepwater Horizon and previous spills, including 1989’s Exxon Valdez and the Ixtoc 1 in 1979, our understanding of how to avoid future crises has not advanced at the same pace as offshore oil and gas development. We argue that …
Associations Between Chronic Exposure To Polycyclic Aromatic Hydrocarbons And Health Indices In Gulf Of Mexico Tilefish (Lopholatilus Chamaeleonticeps) Post Deepwater Horizon, Susan M. Syder, Erin Pulster, Steven Murawski
Associations Between Chronic Exposure To Polycyclic Aromatic Hydrocarbons And Health Indices In Gulf Of Mexico Tilefish (Lopholatilus Chamaeleonticeps) Post Deepwater Horizon, Susan M. Syder, Erin Pulster, Steven Murawski
C-IMAGE Publications
A time series of polycyclic aromatic hydrocarbon (PAH) data was collected for Gulf of Mexico demersal fishes in the years following the Deepwater Horizon oil spill (2012–2017). Tilefish (Lopholatilus chamaeleonticeps ) were sampled via demersal longline at repeat stations in the northern Gulf of Mexico in 2012 to 2015 and 2017. Bile samples (n = 256) were analyzed via high‐performance liquid chromatography with fluorescence detection for PAH metabolites as a biomarker of exposure to PAHs. Liver tissues (n = 230) were analyzed for accumulation of PAHs and alkylated homologs via quick, easy, cheap, effective, rugged, and safe …
Assessing Seasonality And Density From Passive Acoustic Monitoring Of Signals Presumed To Be From Pygmy And Dwarf Sperm Whales In The Gulf Of Mexico, John A. Hildebrand, Kaitlin E. Fraiser, Simone Baumann-Pickering, Sean M. Wiggins, Karlina P. Merkens, Lance P. Garrison, Melissa S. Soldevilla, Mark A. Mcdonald
Assessing Seasonality And Density From Passive Acoustic Monitoring Of Signals Presumed To Be From Pygmy And Dwarf Sperm Whales In The Gulf Of Mexico, John A. Hildebrand, Kaitlin E. Fraiser, Simone Baumann-Pickering, Sean M. Wiggins, Karlina P. Merkens, Lance P. Garrison, Melissa S. Soldevilla, Mark A. Mcdonald
C-IMAGE Publications
Pygmy sperm whales (Kogia breviceps) and dwarf sperm whales (Kogia sima) are deep diving cetaceans that commonly strand along the coast of the southeast US, but that are difficult to study visually at sea because of their elusive behavior. Conventional visual surveys are thought to significantly underestimate the presence of Kogia and they have proven difficult to approach for tracking and tagging. An approach is presented for density estimation of signals presumed to be from Kogia spp. based on passive acoustic monitoring data collected at sites in the Gulf of Mexico (GOM) from the period following …
Mississippi River And Campeche Bank (Gulf Of Mexico) Episodes Of Cross-Shelf Export Of Coastal Waters Observed With Satellites, Daniel Otis, Matthieu Le Hénaff, Vassiliki H. Kourafalou, Lucas Mceachron, Frank Muller-Karger
Mississippi River And Campeche Bank (Gulf Of Mexico) Episodes Of Cross-Shelf Export Of Coastal Waters Observed With Satellites, Daniel Otis, Matthieu Le Hénaff, Vassiliki H. Kourafalou, Lucas Mceachron, Frank Muller-Karger
Marine Science Faculty Publications
The cross-shelf advection of coastal waters into the deep Gulf of Mexico is important for the transport of nutrients or potential pollutants. Twenty years of ocean color satellite imagery document such cross-shelf transport events via three export pathways in the Gulf of Mexico: from the Campeche Bank toward the central Gulf, from the Campeche Bank toward the Florida Straits, and from the Mississippi Delta to the Florida Straits. A catalog of these events was created based on the visual examination of 7280 daily satellite images. Water transport from the Campeche Bank to the central Gulf occurred frequently and with no …
Population Dynamics Of Pinfish In The Eastern Gulf Of Mexico (1998-2016), Meaghan E. Faletti, Dinorah H. Chacin, Jonathan A. Peake, Timothy C. Macdonald, Christopher D. Stallings
Population Dynamics Of Pinfish In The Eastern Gulf Of Mexico (1998-2016), Meaghan E. Faletti, Dinorah H. Chacin, Jonathan A. Peake, Timothy C. Macdonald, Christopher D. Stallings
Marine Science Faculty Publications
Forage fishes play an important role in marine ecosystems by transferring energy and nutrients through the food web. The population dynamics of forage species can therefore have cascading effects across multiple trophic levels. Here, we analyzed a 19-year dataset on Pinfish (Lagodon rhomboides) across four eastern Gulf of Mexico estuaries to investigate population dynamics, inter- and intra-annual synchrony, metapopulation portfolio effects, growth, and habitat effects. Young-of-year growth rates did not differ among estuaries. The population dynamics of these four systems were stable in the long-term, but highly dynamic inter-annually. Intra-annual dynamics were stable and predictable despite variation in long-term means. …
Spatial And Temporal Variability Of PCo2, Carbon Fluxes, And Saturation State On The West Florida Shelf, Lisa L. Robbins, Kendra L. Daly, L. Barbero, R. Wanninkhof, R. He, H. Zong, J. T. Lisle, W. J. Cai, C. G. Smith
Spatial And Temporal Variability Of PCo2, Carbon Fluxes, And Saturation State On The West Florida Shelf, Lisa L. Robbins, Kendra L. Daly, L. Barbero, R. Wanninkhof, R. He, H. Zong, J. T. Lisle, W. J. Cai, C. G. Smith
Marine Science Faculty Publications
The West Florida Shelf (WFS) is a source of uncertainty for the Gulf of Mexico carbon budget. Data from the synthesis of approximately 135,000 pCO2 values from 97 cruises from the WFS show that the shelf waters fluctuate between being a weak source to a weak sink of carbon. Overall, the shelf acts as a weak source of CO2 at 0.32 ± 1.5 mol m−2 yr−1. Subregions, however, reveal slightly different trends, where surface waters associated with 40–200‐m isobath in the northern and southern WFS are generally weak sinks all year, except for summer …
Spatial And Temporal Variability Of PCo2, Carbon Fluxes, And Saturation State On The West Florida Shelf, L. L. Robbins, Kendra L. Daly, L. Barbero, R. Wanninkhof, R. He, H. Zong, J. T. Lisle, W. J. Cai, C. G. Smith
Spatial And Temporal Variability Of PCo2, Carbon Fluxes, And Saturation State On The West Florida Shelf, L. L. Robbins, Kendra L. Daly, L. Barbero, R. Wanninkhof, R. He, H. Zong, J. T. Lisle, W. J. Cai, C. G. Smith
C-IMAGE Publications
The West Florida Shelf (WFS) is a source of uncertainty for the Gulf of Mexico carbon budget. Data from the synthesis of approximately 135,000 p CO2 values from 97 cruises from the WFS show that the shelf waters fluctuate between being a weak source to a weak sink of carbon. Overall, the shelf acts as a weak source of CO2 at 0.32 ± 1.5 mol m−2 yr−1. Subregions, however, reveal slightly different trends, where surface waters associated with 40–200‐m isobath in the northern and southern WFS are generally weak sinks all year, except for summer …
Numerical Modeling Of The Interactions Of Oil, Marine Snow, And Riverine Sediments In The Ocean, Anusha L. Dissanayake, Adrian B. Burd, Kendra L. Daly, Simone Francis, Uta Passow
Numerical Modeling Of The Interactions Of Oil, Marine Snow, And Riverine Sediments In The Ocean, Anusha L. Dissanayake, Adrian B. Burd, Kendra L. Daly, Simone Francis, Uta Passow
Marine Science Faculty Publications
Natural or spilled oil in the ocean can interact with marine snow and sediment from riverine sources and form Marine Oil Snow (MOS) aggregates including aggregates consisting of phytoplankton, detritus, and feces. Such aggregates have a fractal structure and can transport oil from the surface layers to greater depths in the ocean, eventually settling on the seafloor. In recent studies of the Deepwater Horizon and IXTOC‐1 oil spills in the Gulf of Mexico, this process was identified as one of the main mechanisms for transporting oil vertically in the water column. We have adapted a stochastic, one‐dimensional numerical model that …
Producing Distribution Maps For A Spatially-Explicit Ecosystem Model Using Large Monitoring And Environmental Databases And A Combination Of Interpolation And Extrapolation, Arnaud Grüss, Michael D. Drexler, Cameron H. Ainsworth, Elizabeth A. Babcock, Joseph H. Tarnecki, Matthew S. Love
Producing Distribution Maps For A Spatially-Explicit Ecosystem Model Using Large Monitoring And Environmental Databases And A Combination Of Interpolation And Extrapolation, Arnaud Grüss, Michael D. Drexler, Cameron H. Ainsworth, Elizabeth A. Babcock, Joseph H. Tarnecki, Matthew S. Love
Marine Science Faculty Publications
To be able to simulate spatial patterns of predator-prey interactions, many spatially-explicit ecosystem modeling platforms, including Atlantis, need to be provided with distribution maps defining the annual or seasonal spatial distributions of functional groups and life stages. We developed a methodology combining extrapolation and interpolation of the predictions made by statistical habitat models to produce distribution maps for the fish and invertebrates represented in the Atlantis model of the Gulf of Mexico (GOM) Large Marine Ecosystem (LME) (“Atlantis-GOM”). This methodology consists of: (1) compiling a large monitoring database, gathering all the fisheries-independent and fisheries-dependent data collected in the northern (U.S.) …
Influence Of River-Induced Fronts On Hydrocarbon Transport: A Multiplatform Observational Study, Yannis Androulidakis, Vassiliki Kourafalou, Tamay Özgökmen, Oscar Garcia-Pineda, Björn Lund, Matthieu Le Hénaff, Chuanmin Hu, Brian K. Haus, Guillaume Novelli, Cedric Guigand, Heesook Kang, Lars Hole, Jochen Horstmann
Influence Of River-Induced Fronts On Hydrocarbon Transport: A Multiplatform Observational Study, Yannis Androulidakis, Vassiliki Kourafalou, Tamay Özgökmen, Oscar Garcia-Pineda, Björn Lund, Matthieu Le Hénaff, Chuanmin Hu, Brian K. Haus, Guillaume Novelli, Cedric Guigand, Heesook Kang, Lars Hole, Jochen Horstmann
Marine Science Faculty Publications
The Taylor Energy Site is located in the vicinity of the Mississippi Delta region over the Northern Gulf of Mexico (NGoM). Surface oil patches have been persistently observed within this site since 2004, when an oil rig was destroyed by Hurricane Ivan. A multiplatform observational experiment was conducted in April 2017 to investigate, for the first time, the main hydrocarbon pathways from the Taylor Energy Site toward the NGoM continental shelves, and the Gulf interior, under the influence of local and regional physical processes. Results indicate that the Mississippi River (MR)-induced fronts over the Taylor Energy Site, in combination with …
Stable And Radiocarbon Isotopic Composition Of Dissolved Organic Matter In The Gulf Of Mexico, B. D. Walker, E. R. M. Druffel, J. Kolasinski, B. J. Roberts, X. Xu, B. E. Rosenheim
Stable And Radiocarbon Isotopic Composition Of Dissolved Organic Matter In The Gulf Of Mexico, B. D. Walker, E. R. M. Druffel, J. Kolasinski, B. J. Roberts, X. Xu, B. E. Rosenheim
Marine Science Faculty Publications
Dissolved organic carbon (DOC) is of primary importance to marine ecosystems and the global carbon cycle. Stable carbon (δ13C) and radiocarbon (Δ14C) isotopic measurements are powerful tools for evaluating DOC sources and cycling. However, the isotopic signature of DOC in the Gulf of Mexico (GOM) remains almost completely unknown. Here we present the first DOC Δ14C and δ13C depth profiles from the GOM. Our results suggest the Mississippi River exports large amounts of DOC with an anthropogenic “bomb” Δ14C signature. Riverine DOC is removed and recycled offshore, and some marine …
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 …
Employing Extant Stable Carbon Isotope Data In Gulf Of Mexico Sedimentary Organic Matter For Oil Spill Studies, Brad E. Rosenheim, Matthew A. Pendergraft, George C. Flowers, Robert Carney, José L. Sericano, Jeff Chanton, Zeynep Dincer, Terry L. Wade
Employing Extant Stable Carbon Isotope Data In Gulf Of Mexico Sedimentary Organic Matter For Oil Spill Studies, Brad E. Rosenheim, Matthew A. Pendergraft, George C. Flowers, Robert Carney, José L. Sericano, Jeff Chanton, Zeynep Dincer, Terry L. Wade
Marine Science Faculty Publications
We have compiled and mapped available carbon isotope data from sedimentary organic material sampled from the Gulf of Mexico prior to 2010. These data provide a baseline to which any changes in the Gulf of Mexico after the 2010 Deepwater Horizon oil spill can be compared. The mean (±1σ) δ13C values, relative to PDB, are −21.4±1.9‰ (entire Gulf of Mexico), −21.7±1.2‰ (shelf sediments), −20.4±1.6‰ (deepwater sediments), and −25.2±4.1‰ (seep-affected sediments). We compare pre-spill mean δ13C values to carbon isotope measurements of sedimentary organic material from coretop samples collected after the 2010 Deepwater Horizon oil …
Changes In Sediment Redox Conditions Following The Bp Dwh Blowout Event, D. W. Hastings, Patrick Schwing, G. R. Brooks, R. A. Larson, J. L. Morford, T. Roeder, K. A. Quinn, T. Bartlett, Isabel C. Romero, David Hollander
Changes In Sediment Redox Conditions Following The Bp Dwh Blowout Event, D. W. Hastings, Patrick Schwing, G. R. Brooks, R. A. Larson, J. L. Morford, T. Roeder, K. A. Quinn, T. Bartlett, Isabel C. Romero, David Hollander
Marine Science Faculty Publications
Following the blowout of the Macondo well, a pulse in sedimentation resulted in changes in sedimentary redox conditions. This is demonstrated by downcore and temporal changes in the concentration of redox sensitive metals: Mn, Re, and Cd. Sediment cores collected in the NE Gulf of Mexico (GoM) reveal increased sedimentation after the Deepwater Horizon (DWH) blowout. The formation of mucous-rich marine snow in surface waters and subsequent rapid deposition to underlying sediments is the likely cause. Respiration of this material resulted in decreased pore-water oxygen concentration and a shoaled redoxcline, resulting in two distinct Mn peaks in sediments following …
Associations Of Metal Exposure In Otoliths With Lesion Formation In Offshore, Northeastern Gulf Of Mexico Fishes Collected After The Deepwater Horizon Oil Spill (2011-2013), Ernst B. Peebles
C-IMAGE data
This dataset contains annual metal concentrations for the years 2009-2011 within the otoliths of six, offshore Gulf of Mexico fishes: Red Grouper, Epinephelus morio; Red Porgy, Pagrus pagrus; Red Snapper, Lutjanus campechanus; Southern Hake, Urophycis floridana; Tilefish, Lopholatilus chamaeleonticeps; and Yellowedge Grouper, Hyporthodus flavolimbatus. Fish were collected from the northeastern Gulf of Mexico, from approximately the Louisiana Shelf to the West Florida Shelf. For each sample, a suite of 9 isotopes was measured within fish otoliths: 24Mg, 51V, 53Cr, 57Fe, 59Co, 60Ni, 63Cu, 64Zn, and 208Pb. Annual metal concentrations were determined by averaging metal concentrations corresponding to the annual increment …
Assessing The Impacts Of Oil-Associated Marine Snow Formation And Sedimentation During And After The Deepwater Horizon Oil Spill, Kendra L. Daly, Uta Passow, Jeffrey Chanton, David Hollander
Assessing The Impacts Of Oil-Associated Marine Snow Formation And Sedimentation During And After The Deepwater Horizon Oil Spill, Kendra L. Daly, Uta Passow, Jeffrey Chanton, David Hollander
Marine Science Faculty Publications
The Deepwater Horizon oil spill was the largest in US history, unprecedented for the depth and volume of oil released, the amount of dispersants applied, and the unexpected, protracted sedimentation of oil-associated marine snow (MOS) to the seafloor. Marine snow formation, incorporation of oil, and subsequent gravitational settling to the seafloor (i.e., MOSSFA: Marine Oil Snow Sedimentation and Flocculent Accumulation) was a significant pathway for the distribution and fate of oil, accounting for as much as 14% of the total oil released. Long residence times of oil on the seafloor will result in prolonged exposure by benthic organisms and economically …
Quantification Of Boat Visitation Rates At Artificial And Natural Reefs In The Eastern Gulf Of Mexico Using Acoustic Recorders, Peter Simard, Kara R. Wall, David A. Mann, Carrie C. Wall, Christopher D. Stallings
Quantification Of Boat Visitation Rates At Artificial And Natural Reefs In The Eastern Gulf Of Mexico Using Acoustic Recorders, Peter Simard, Kara R. Wall, David A. Mann, Carrie C. Wall, Christopher D. Stallings
Marine Science Faculty Publications
Artificial reefs are commonly used as a management tool, in part to provide ecosystem services, including opportunities for recreational fishing and diving. Quantifying the use of artificial reefs by recreational boaters is essential for determining their value as ecosystem services. In this study, four artificial–natural reef pairs in the eastern Gulf of Mexico (off western Florida) were investigated for boat visitation rates using autonomous acoustic recorders. Digital SpectroGram (DSG) recorders were used to collect sound files from April 2013 to March 2015. An automatic detection algorithm was used to identify boat noise in individual files using the harmonic peaks generated …
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, …
Sedimentation Pulse In The Ne Gulf Of Mexico Following The 2010 Dwh Blowout, Gregg R. Brooks, Rebekka A. Larson, Patrick Schwing, Isabel C. Romero, Christopher Moore, Gert-Jan Reichart, Tom Jilbert, Jeff P. Chanton, David W. Hastings, Will A. Overholt, Kala P. Marks, Joel E. Kostka, Charles W. Holmes, David Hollander
Sedimentation Pulse In The Ne Gulf Of Mexico Following The 2010 Dwh Blowout, Gregg R. Brooks, Rebekka A. Larson, Patrick Schwing, Isabel C. Romero, Christopher Moore, Gert-Jan Reichart, Tom Jilbert, Jeff P. Chanton, David W. Hastings, Will A. Overholt, Kala P. Marks, Joel E. Kostka, Charles W. Holmes, David Hollander
Marine Science Faculty Publications
The objective of this study was to investigate the impacts of the Deepwater Horizon (DWH) oil discharge at the seafloor as recorded in bottom sediments of the DeSoto Canyon region in the northeastern Gulf of Mexico. Through a close coupling of sedimentological, geochemical, and biological approaches, multiple independent lines of evidence from 11 sites sampled in November/December 2010 revealed that the upper ~1 cm depth interval is distinct from underlying sediments and results indicate that particles originated at the sea surface. Consistent dissimilarities in grain size over the surficial ~1 cm of sediments correspond to excess 234Th depths, which …
Hydrocarbons In Deep-Sea Sediments Following The 2010 Deepwater Horizon Blowout In The Northeast Gulf Of Mexico, Isabel C. Romero, Patrick Schwing, Gregg R Brooks, Rebekka A Larson, David W. Hastings, Greg Ellis, Ethan Goddard, David Hollander
Hydrocarbons In Deep-Sea Sediments Following The 2010 Deepwater Horizon Blowout In The Northeast Gulf Of Mexico, Isabel C. Romero, Patrick Schwing, Gregg R Brooks, Rebekka A Larson, David W. Hastings, Greg Ellis, Ethan Goddard, David Hollander
Marine Science Faculty Publications
The Deepwater Horizon (DWH) spill released 4.9 million barrels of oil into the Gulf of Mexico (GoM) over 87 days. Sediment and water sampling efforts were concentrated SW of the DWH and in coastal areas. Here we present geochemistry data from sediment cores collected in the aftermath of the DWH event from 1000-1500 m water depth in the DeSoto Canyon, NE of the DWH wellhead. Cores were analyzed at high-resolution (at 2 mm and 5 mm intervals) in order to evaluate the concentration, composition and input of hydrocarbons to the seafloor. Specifically, we analyzed total organic carbon (TOC), aliphatic, polycyclic …
A Decline In Benthic Foraminifera Following The Deepwater Horizon Event In The Northeastern Gulf Of Mexico, Patrick Schwing, Isabel C. Romero, Gregg R Brooks, David W 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 C. Romero, Gregg R Brooks, David W Hastings, Rebekka A Larson, David Hollander
Marine Science Faculty 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 accumulation rate (BFAR) …
Fish Sound Production In The Presence Of Harmful Algal Blooms In The Eastern Gulf Of Mexico, Carrie C. Wall, Chad Lembke, Chuanmin Hu, David A. Mann
Fish Sound Production In The Presence Of Harmful Algal Blooms In The Eastern Gulf Of Mexico, Carrie C. Wall, Chad Lembke, Chuanmin Hu, David A. Mann
Marine Science Faculty Publications
This paper presents the first known research to examine sound production by fishes during harmful algal blooms (HABs). Most fish sound production is species-specific and repetitive, enabling passive acoustic monitoring to identify the distribution and behavior of soniferous species. Autonomous gliders that collect passive acoustic data and environmental data concurrently can be used to establish the oceanographic conditions surrounding sound-producing organisms. Three passive acoustic glider missions were conducted off west-central Florida in October 2011, and September and October 2012. The deployment period for two missions was dictated by the presence of red tide events with the glider path specifically set …
Rapid Changes In The Seasonal Sea Level Cycle Along The Us Gulf Coast From The Late 20th Century, Thomas Wahl, Francisco M. Calafat, Mark E. Luther
Rapid Changes In The Seasonal Sea Level Cycle Along The Us Gulf Coast From The Late 20th Century, Thomas Wahl, Francisco M. Calafat, Mark E. Luther
Marine Science Faculty Publications
Temporal variations of the seasonal sea level harmonics throughout the 20th and early 21st century along the United States Gulf coast are investigated. A significant amplification of the annual sea level cycle from the 1990s onward is found, with both lower winter and higher summer sea levels in the eastern Gulf. Ancillary data are used to build a set of multiple regression models to explore the mechanisms driving the decadal variability and recent increase in the annual cycle. The results suggest that changes in the air surface temperature toward warmer summers and colder winters and changes in mean sea level …
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 …
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 …