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Articles 1 - 30 of 59
Full-Text Articles in Life Sciences
Tracking The Hercules 265 Marine Gas Well Blowout In The Gulf Of Mexico, Isabel C. Romero, Tamay Özgökmen, Susan Snyder, Patrick Schwing, Bryan J. O'Malley, Francisco J. Beron‐Vera, Maria J. Olascoaga, Ping Zhu, Edward Ryan, Shuyi S. Chen, Dana L. Wetzel, David Hollander, Steven Murawski
Tracking The Hercules 265 Marine Gas Well Blowout In The Gulf Of Mexico, Isabel C. Romero, Tamay Özgökmen, Susan Snyder, Patrick Schwing, Bryan J. O'Malley, Francisco J. Beron‐Vera, Maria J. Olascoaga, Ping Zhu, Edward Ryan, Shuyi S. Chen, Dana L. Wetzel, David Hollander, Steven Murawski
Marine Science Faculty Publications
On 23 July 2013, a marine gas rig (Hercules 265) ignited in the northern Gulf of Mexico. The rig burned out of control for 2 days before being extinguished. We conducted a rapid‐response sampling campaign near Hercules 265 after the fire to ascertain if sediments and fishes were polluted above earlier baseline levels. A surface drifter study confirmed that surface ocean water flowed to the southeast of the Hercules site, while the atmospheric plume generated by the blowout was in eastward direction. Sediment cores were collected to the SE of the rig at a distance of ∼0.2, 8, …
Nutrient Concentrations For The Northeastern Gulf Of Mexico And West Florida Shelf: June 2012 – August 2014, Kendra L. Daly
Nutrient Concentrations For The Northeastern Gulf Of Mexico And West Florida Shelf: June 2012 – August 2014, Kendra L. Daly
C-IMAGE data
This dataset contains seasonal nutrient data collected from the northeastern Gulf of Mexico and the west Florida shelf. The contents of the dataset are an assessment of to assess the seasonal and interannual concentration and distribution of nutrients after the Deepwater Horizon oil spill.
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, …
Secchi Disk Depth: A New Theory And Mechanistic Model For Underwater Visibility, Zhongping Lee, Shaoling Shang, Chuanmin Hu, Keping Du, Alan Weidemann, Weilin Hou, Junfang Lin, Gong Lin
Secchi Disk Depth: A New Theory And Mechanistic Model For Underwater Visibility, Zhongping Lee, Shaoling Shang, Chuanmin Hu, Keping Du, Alan Weidemann, Weilin Hou, Junfang Lin, Gong Lin
Marine Science Faculty Publications
Secchi disk depth (ZSD) is a measure of water transparency, whose interpretation has wide applications from diver visibility to studies of climate change. This transparency has been explained in the past 60 + years with the underwater visibility theory, the branch of the general visibility theory for visual ranging in water. However, through a thorough review of the physical processes involved in visual ranging in water, we show that this theory may not exactly represent the sighting of a Secchi disk by a human eye. Further, we update the Law of Contrast Reduction, a key concept in visibility …
Technology For Ocean Acidification Research: Needs And Availability, Todd R. Martz, Kendra L. Daly, Robert H. Byrne, Jonathan H. Stillman, Daniela Turk
Technology For Ocean Acidification Research: Needs And Availability, Todd R. Martz, Kendra L. Daly, Robert H. Byrne, Jonathan H. Stillman, Daniela Turk
Marine Science Faculty Publications
Diverse instruments, both custom built and commercially available, have been used to measure the properties of the aqueous CO2 system in seawater at differing levels of autonomy (automated benchtop, continuous underway, autonomous in situ). In this review, we compare the capabilities of commercially available instruments with the needs of oceanographers in order to highlight major shortfalls in the state-of-the art instrumentation broadly available to the ocean acidification (OA) scientific community. In addition, we describe community surveys that identify needs for continued development and refinement of sensor and instrument technologies, expansion of programs that provide Certified Reference Materials, development of …
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 …
Southern Exposure: New Paleoclimate Insights From Southern Ocean And Antarctic Margin Sediments, Amelia E. Shevenell, Steven M. Bohaty
Southern Exposure: New Paleoclimate Insights From Southern Ocean And Antarctic Margin Sediments, Amelia E. Shevenell, Steven M. Bohaty
Marine Science Faculty Publications
Much of what is known about the evolution of Antarctica’s cryosphere in the geologic past is derived from ice-distal deep-sea sedimentary records. Recent advances in drilling technology and climate proxy methods have made it possible to retrieve and interpret high-quality ice-proximal sedimentary sequences from Antarctica’s margins and the Southern Ocean. These records contain a wealth of information about the individual histories of the East and West Antarctic Ice Sheets and associated temperature change in the circum-Antarctic seas. Emerging studies of Antarctic drill cores provide evidence of dynamic climate variability on both short and long timescales over the past 20 million …
Meta-Omic Signatures Of Microbial Metal And Nitrogen Cycling In Marine Oxygen Minimum Zones, Jennifer B. Glass, Cecilia B. Kretz, Sangita Ganesh, Piyush Ranjan, Sherry L. Seston, Kristen N. Buck, William M. Landing, Peter L. Morton, James W. Moffett, Stephen J. Giovannoni, Kevin L. Vergin, Frank J. Stewart
Meta-Omic Signatures Of Microbial Metal And Nitrogen Cycling In Marine Oxygen Minimum Zones, Jennifer B. Glass, Cecilia B. Kretz, Sangita Ganesh, Piyush Ranjan, Sherry L. Seston, Kristen N. Buck, William M. Landing, Peter L. Morton, James W. Moffett, Stephen J. Giovannoni, Kevin L. Vergin, Frank J. Stewart
Marine Science Faculty Publications
Iron (Fe) and copper (Cu) are essential cofactors for microbial metalloenzymes, but little is known about the metalloenyzme inventory of anaerobic marine microbial communities despite their importance to the nitrogen cycle. We compared dissolved O2, NO3−" role="presentation">−3, NO2−" role="presentation">−2, Fe and Cu concentrations with nucleic acid sequences encoding Fe and Cu-binding proteins in 21 metagenomes and 9 metatranscriptomes from Eastern Tropical North and South Pacific oxygen minimum zones and 7 metagenomes from the Bermuda Atlantic Time-series Station. Dissolved Fe concentrations increased sharply at upper oxic-anoxic transition zones, with the highest Fe:Cu molar ratio (1.8) occurring at …
World’S Largest Macroalgal Blooms Altered Phytoplankton Biomass In Summer In The Yellow Sea: Satellite Observations, Qianguo Xing, Chuanmin Hu, Danling Tang, Liqiao Tian, Shilin Tang, Xiao Hua Wang, Mingjing Lou, Xuelu Gao
World’S Largest Macroalgal Blooms Altered Phytoplankton Biomass In Summer In The Yellow Sea: Satellite Observations, Qianguo Xing, Chuanmin Hu, Danling Tang, Liqiao Tian, Shilin Tang, Xiao Hua Wang, Mingjing Lou, Xuelu Gao
Marine Science Faculty Publications
Since 2008, the world’s largest blooms of the green macroalgae, Ulva prolifera, have occurred every summer in the Yellow Sea, posing the question of whether these macroalgal blooms (MABs) have changed the phytoplankton biomass due to their perturbations of nutrient dynamics. We have attempted to address this question using long-term Moderate Resolution Imaging Spectroradiometer (MODIS) observations. A new MODIS monthly time-series of chlorophyll-a concentrations (Chl-a, an index of phytoplankton biomass) was generated after removing the macroalgae-contaminated pixels that were characterized by unexpectedly high values in the daily Chl-a products. Compared with Chl-a during July of 2002–2006 (the pre-MAB period), Chl-a …
Interpretation Of Complexometric Titration Data: An Intercomparison Of Methods For Estimating Models Of Trace Metal Complexation By Natural Organic Ligands, Ivanka Pižeta, Sylvia Sander, Robert Hudson, Dario Omanović, Oliver Baars, Katherine Barbeau, Kristen N. Buck, Randelle Bundy, Gonzalo Carrasco, Peter Croot, Cédric Garnier, Louise Gerringa, Martha Gledhill, Katsumi Hirose, Yoshiko Kondo, Luis Laglera, Jochen Nuester, Micha Rijkenberg, Shigenobu Takeda, Benjamin Twining, Mona C. Wells Mona C. Wells
Interpretation Of Complexometric Titration Data: An Intercomparison Of Methods For Estimating Models Of Trace Metal Complexation By Natural Organic Ligands, Ivanka Pižeta, Sylvia Sander, Robert Hudson, Dario Omanović, Oliver Baars, Katherine Barbeau, Kristen N. Buck, Randelle Bundy, Gonzalo Carrasco, Peter Croot, Cédric Garnier, Louise Gerringa, Martha Gledhill, Katsumi Hirose, Yoshiko Kondo, Luis Laglera, Jochen Nuester, Micha Rijkenberg, Shigenobu Takeda, Benjamin Twining, Mona C. Wells Mona C. Wells
Marine Science Faculty Publications
With the common goal of more accurately and consistently quantifying ambient concentrations of free metal ions and natural organic ligands in aquatic ecosystems, researchers from 15 laboratories that routinely analyze trace metal speciation participated in an intercomparison of statistical methods used to model their most common type of experimental dataset, the complexometric titration. All were asked to apply statistical techniques that they were familiar with to model synthetic titration data that are typical of those obtained by applying state-of-the-art electrochemical methods – anodic stripping voltammetry (ASV) and competitive ligand equilibration-adsorptive cathodic stripping voltammetry (CLE-ACSV) – to the analysis of natural …
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 …
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.
Strategic Assessment Of Fisheries Independent Monitoring Programs In The Gulf Of Mexico, Paul Mark Suprenand, Michael Drexler, David L. Jones, Cameron H. Ainsworth
Strategic Assessment Of Fisheries Independent Monitoring Programs In The Gulf Of Mexico, Paul Mark Suprenand, Michael Drexler, David L. Jones, Cameron H. Ainsworth
Marine Science Faculty Publications
This study evaluates information produced from 14 fisheries independent monitoring programs (FIM) in the Gulf of Mexico. We consider the uniqueness of information from each program and its usefulness in estimating fisheries management indices. Biomass values of 35 functional groups are extracted from an operating model (Ecospace) in such a way as to replicate the patterns of historic FIM samplings. Observation error is added to these data in order to create a set of pseudo data that replicates the type and quality of information obtained from FIM programs. The pseudo data then are put into a separate fishery assessment model …
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 …
Observations Of Hysteresis In The Annual Exchange Circulation Of A Large Microtidal Estuary, Steven D. Meyers, Monica Wilson, Mark E. Luther
Observations Of Hysteresis In The Annual Exchange Circulation Of A Large Microtidal Estuary, Steven D. Meyers, Monica Wilson, Mark E. Luther
Marine Science Faculty Publications
A nonlinear relation between the salinity field and the subtidal exchange circulation in the Tampa Bay estuary is demonstrated using observational data from 1999 to 2011. The data are averaged to form mean monthly climatological values of total freshwater discharge ( ), axial and vertical salinity gradients, and subtidal vertical shear. Well‐known steady state solutions indicate that the exchange circulation is linearly proportional to the horizontal salinity gradient, assuming a constant vertical eddy viscosity ( ). The exchange flow is found to be multivalued with respect to the horizontal salinity gradient, forming a hysteresis loop in parameter space that passes …
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) …
Presentations And Posters From The 2015 Research That Matters Sustainable Food Conference: People, Policy, & Practice, Various Authors
Presentations And Posters From The 2015 Research That Matters Sustainable Food Conference: People, Policy, & Practice, Various Authors
Food and Gardening Working Group
The University of South Florida Sustainable Food Conference: People, Policy, & Practice brought together food researchers from USF and the larger Tampa Bay community to share ideas and findings that will pave the path toward more sustainable and resilient communities. It featured research papers and presentations from all disciplines and methodologies addressing issues concerning food production, distribution, retail, and/or consumption.
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 …
And On Top Of All That… Coping With Ocean Acidification In The Midst Of Many Stressors, Denise L. Breitburg, Joseph Salisbury, Joan M. Bernhard, Wei-Jun Cai, Sam Dupont, Scott C. Doney, Kristy J. Kroeker, Lisa A. Levin, W. Christopher Long, Lisa M. Milke, Seth H. Miller, Beth Phelan, Uta Passow, Brad A. Seibel, Anne E. Todgham, Ann M. Tarrant
And On Top Of All That… Coping With Ocean Acidification In The Midst Of Many Stressors, Denise L. Breitburg, Joseph Salisbury, Joan M. Bernhard, Wei-Jun Cai, Sam Dupont, Scott C. Doney, Kristy J. Kroeker, Lisa A. Levin, W. Christopher Long, Lisa M. Milke, Seth H. Miller, Beth Phelan, Uta Passow, Brad A. Seibel, Anne E. Todgham, Ann M. Tarrant
Marine Science Faculty Publications
Oceanic and coastal waters are acidifying due to processes dominated in the open ocean by increasing atmospheric CO2 and dominated in estuaries and some coastal waters by nutrient-fueled respiration. The patterns and severity of acidification, as well as its effects, are modified by the host of stressors related to human activities that also influence these habitats. Temperature, deoxygenation, and changes in food webs are particularly important co-stressors because they are pervasive, and both their causes and effects are often mechanistically linked to acidification. Development of a theoretical underpinning to multiple stressor research that considers physiological, ecological, and evolutionary perspectives is …
Ebola Cases And Health System Demand In Liberia, John M. Drake, Rajreni B. Kaul, Laura W. Alexander, Suzanne M. O’Regan, Andrew M. Kramer, J. Tomlin Pulliam, Matthew J. Ferrari, Andrew W. Park
Ebola Cases And Health System Demand In Liberia, John M. Drake, Rajreni B. Kaul, Laura W. Alexander, Suzanne M. O’Regan, Andrew M. Kramer, J. Tomlin Pulliam, Matthew J. Ferrari, Andrew W. Park
Integrative Biology Faculty and Staff Publications
In 2014, a major epidemic of human Ebola virus disease emerged in West Africa, where human-to-human transmission has now been sustained for greater than 12 months. In the summer of 2014, there was great uncertainty about the answers to several key policy questions concerning the path to containment. What is the relative importance of nosocomial transmission compared with community-acquired infection? How much must hospital capacity increase to provide care for the anticipated patient burden? To which interventions will Ebola transmission be most responsive? What must be done to achieve containment? In recent years, epidemic models have been used to guide …
Ebola Cases And Health System Demand In Liberia, John M. Drake, Rajreni B. Kaul, Laura W. Alexander, Suzanne M. O’Regan, Andrew M. Kramer, J. Tomlin Pulliam, Matthew J. Ferrari, Andrew W. Park
Ebola Cases And Health System Demand In Liberia, John M. Drake, Rajreni B. Kaul, Laura W. Alexander, Suzanne M. O’Regan, Andrew M. Kramer, J. Tomlin Pulliam, Matthew J. Ferrari, Andrew W. Park
Integrative Biology Faculty and Staff Publications
In 2014, a major epidemic of human Ebola virus disease emerged in West Africa, where human-to-human transmission has now been sustained for greater than 12 months. In the summer of 2014, there was great uncertainty about the answers to several key policy questions concerning the path to containment. What is the relative importance of nosocomial transmission compared with community-acquired infection? How much must hospital capacity increase to provide care for the anticipated patient burden? To which interventions will Ebola transmission be most responsive? What must be done to achieve containment? In recent years, epidemic models have been used to guide …
Immigration Can Destabilize Tri-Trophic Interactions: Implications For Conservation Of Top Predators, Kevin L. S. Drury, Jesse D. Suter, Jacob B. Rendall, Andrew M. Kramer, John M. Drake
Immigration Can Destabilize Tri-Trophic Interactions: Implications For Conservation Of Top Predators, Kevin L. S. Drury, Jesse D. Suter, Jacob B. Rendall, Andrew M. Kramer, John M. Drake
Integrative Biology Faculty and Staff Publications
Top predators often have large home ranges and thus are especially vulnerable to habitat loss and fragmentation. Increasing connectance among habitat patches is therefore a common conservation strategy, based in part on models showing that increased migration between subpopulations can reduce vulnerability arising from population isolation. Although three-dimensional models are appropriate for exploring consequences to top predators, the effects of immigration on tri-trophic interactions have rarely been considered. To explore the effects of immigration on the equilibrium abundances of top predators, we studied the effects of immigration in the three-dimensional Rosenzweig-MacArthur model. To investigate the stability of the top predator …
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 …
The Νsaα Specific Lipoprotein Like Cluster (Lpl) Of S. Aureus Usa300 Contributes To Immune Stimulation And Invasion In Human Cells, Minh Thu Nguyen, Beatrice Kraft, Wenqi Yu, Dogan Doruk Demicrioglu, Tobias Hertlein, Marc Burian, Mathias Schmaler, Klaus Boller, Isabelle Bekeredjian-Ding, Knut Ohlsen, Birgit Schittek, Friedrich Götz
The Νsaα Specific Lipoprotein Like Cluster (Lpl) Of S. Aureus Usa300 Contributes To Immune Stimulation And Invasion In Human Cells, Minh Thu Nguyen, Beatrice Kraft, Wenqi Yu, Dogan Doruk Demicrioglu, Tobias Hertlein, Marc Burian, Mathias Schmaler, Klaus Boller, Isabelle Bekeredjian-Ding, Knut Ohlsen, Birgit Schittek, Friedrich Götz
Molecular Biosciences Faculty Publications
All Staphylococcus aureus genomes contain a genomic island, which is termed νSaα and characterized by two clusters of tandem repeat sequences, i.e. the exotoxin (set) and 'lipoprotein-like' genes (lpl). Based on their structural similarities the νSaα islands have been classified as type I to IV. The genomes of highly pathogenic and particularly epidemic S. aureus strains (USA300, N315, Mu50, NCTC8325, Newman, COL, JH1 or JH9) belonging to the clonal complexes CC5 and CC8 bear a type I νSaα island. Since the contribution of the lpl gene cluster encoded in the νSaα island to virulence is unclear to date, we deleted …
Adaptive Plasticity And Epigenetic Variation In Response To Warming In An Alpine Plant, Adrienne B. Nicotra, Deborah L. Segal, Gemma L. Hoyle, Aaron W. Schrey, Koen J. Verhoeven, Christina L. Richards
Adaptive Plasticity And Epigenetic Variation In Response To Warming In An Alpine Plant, Adrienne B. Nicotra, Deborah L. Segal, Gemma L. Hoyle, Aaron W. Schrey, Koen J. Verhoeven, Christina L. Richards
Integrative Biology Faculty and Staff Publications
Environmentally induced phenotypic plasticity may be a critical component of response to changing environments. We examined local differentiation and adaptive phenotypic plasticity in response to elevated temperature in half-sib lines collected across an elevation gradient for the alpine herb, Wahlenbergia ceracea. Using Amplified Fragment Length Polymorphism (AFLP), we found low but significant genetic differentiation between low- and high-elevation seedlings, and seedlings originating from low elevations grew faster and showed stronger temperature responses (more plasticity) than those from medium and high elevations. Furthermore, plasticity was more often adaptive for plants of low-elevation origin and maladaptive for plants of high elevation. With …
Effects Of Preservation Methods Of Muscle Tissue From Upper-Trophic Level Reef Fishes On Stable Isotope Values (Δ13C And Δ15N), Christopher D. Stallings, James A. Nelson, Katherine L. Rozar, Charles S. Adams, Kara R. Wall, Theodore S. Switzer, Brent L. Winner, David J. Hollander
Effects Of Preservation Methods Of Muscle Tissue From Upper-Trophic Level Reef Fishes On Stable Isotope Values (Δ13C And Δ15N), Christopher D. Stallings, James A. Nelson, Katherine L. Rozar, Charles S. Adams, Kara R. Wall, Theodore S. Switzer, Brent L. Winner, David J. Hollander
Marine Science Faculty Publications
Research that uses stable isotope analysis often involves a delay between sample collection in the field and laboratory processing, therefore requiring preservation to prevent or reduce tissue degradation and associated isotopic compositions. Although there is a growing literature describing the effects of various preservation techniques, the results are often contextual, unpredictable and vary among taxa, suggesting the need to treat each species individually. We conducted a controlled experiment to test the effects of four preservation methods of muscle tissue from four species of upper trophic-level reef fish collected from the eastern Gulf of Mexico (Red Grouper Epinephelus morio, Gag …
The Dry Season Shuffle: Gorges Provide Refugia For Animal Communities In Tropical Savannah Ecosystems, J. Sean Doody, Simon Clulow, Geoff Kay, Domenic D'Amore, David Rhind
The Dry Season Shuffle: Gorges Provide Refugia For Animal Communities In Tropical Savannah Ecosystems, J. Sean Doody, Simon Clulow, Geoff Kay, Domenic D'Amore, David Rhind
USF St. Petersburg campus Faculty Publications
In the wet-dry tropics, animal species face the major challenges of acquiring food, water or shelter during an extended dry season. Although large and conspicuous animals such as ungulates and waterfowl migrate to wetter areas during this time, little is known of how smaller and more cryptic animal species with less mobility meet these challenges. We fenced off the entire entrance of a gorge in the Australian tropical savanna, offering the unique opportunity to determine the composition and seasonal movement patterns of the small vertebrate community. The 1.7 km-long fence was converted to a trapline that was deployed for 18-21 …