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Articles 541 - 570 of 2279

Full-Text Articles in Life Sciences

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 Feb 2020

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, …

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Development And Application Of Computational Models For Biochemical Systems, Fiona L. Kearns Feb 2020

Development And Application Of Computational Models For Biochemical Systems, Fiona L. Kearns

USF Tampa Graduate Theses and Dissertations

Chemistry is the study of matter and its transformations. Computational chemistry uses computer models to study chemistry in all its intricate complexity. In this thesis I hope to accessibly introduce fundamental concepts central for computational chemistry including quantum mechanics, molecular mechanics, and multiscale modeling. I then present several works which I have conducted throughout my graduate career employing many different computational methods. The investigations described here can be summarized as follows. Chapter 2.1 modeling proteins involved in crustacean molting, and identifying possible inhibitors to this molting. Chapter 2.2 modeling d-fructose bound to synthetic saccharide receptors with hopes of improving saccharide …

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Evaluation Of Optimal Technique For Left Breast Irradiation, Amitpal Singh Saini Feb 2020

Evaluation Of Optimal Technique For Left Breast Irradiation, Amitpal Singh Saini

USF Tampa Graduate Theses and Dissertations

Numerous studies have indicated that radiation therapy reduces the risk of the local recurrence of breast cancer in several cases and that it has increased the overall survival rate. Although radiation therapy is beneficial for the treatment of breast cancer, it is known to increase the risk of both radiation toxicity and secondary breast cancer. In left-sided breast cancer, radiation therapy treatment often leads to the heart and its components—such as the left ventricle and left anterior descending artery—being exposed to high doses of radiation because of the proximity of the heart to the left breast, resulting in cardiac complications …

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Targeting Cancer-Anorexia Cachexia Syndrome And Septic Inflammatory-Based Atrophy With R/S 1,3 Butanediol Acetoacetate Diester, Andrew P. Koutnik Feb 2020

Targeting Cancer-Anorexia Cachexia Syndrome And Septic Inflammatory-Based Atrophy With R/S 1,3 Butanediol Acetoacetate Diester, Andrew P. Koutnik

USF Tampa Graduate Theses and Dissertations

Cancer anorexia cachexia syndrome (CACS) is a distinct atrophy disease negatively influencing multiple aspects of clinical care and patient quality of life. Although it directly causes 20% of all cancer-related deaths, there are currently no model systems that encompass the entire multifaceted syndrome, nor are there any effective therapeutic treatments. Here, we show that the VM-M3 mouse model of systemic metastasis demonstrates a novel, immunocompetent, logistically feasible, repeatable phenotype with progressive tumor growth, spontaneous metastatic spread, and the full multifaceted CACS with expected sex dimorphisms across tissue wasting. We also demonstrate that the ubiquitin proteasomal degradation pathway was significantly upregulated …

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Multi-Sensor Observations Of Submesoscale Eddies In Coastal Regions, Gang Li, Yijun He, Guoqiang Liu, Yingjun Zhang, Chuanmin Hu, William Perrie Feb 2020

Multi-Sensor Observations Of Submesoscale Eddies In Coastal Regions, Gang Li, Yijun He, Guoqiang Liu, Yingjun Zhang, Chuanmin Hu, William Perrie

Marine Science Faculty Publications

The temporal and spatial variation in submesoscale eddies in the coastal region of Lianyungang (China) is studied over a period of nearly two years with high-resolution (0.03◦ , about 3 km) observations of surface currents derived from high-frequency coastal radars (HFRs). The centers and boundaries of submesoscale eddies are identified based on a vector geometry (VG) method. A color index (CI) representing MODIS ocean color patterns with a resolution of 500 m is used to compute CI gradient parameters, from which submesoscale features are extracted using a modified eddy-extraction approach. The results show that surface currents derived from HFRs and …

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Active Growth Of Non-Hydrothermal Subaqueous And Subaerial Barite (Baso4) Speleothems In Lechuguilla Cave (New Mexico, Usa), Max Wisshak, Hazel A. Barton, Katey E. Bender, Harvey R. Duchene Jan 2020

Active Growth Of Non-Hydrothermal Subaqueous And Subaerial Barite (Baso4) Speleothems In Lechuguilla Cave (New Mexico, Usa), Max Wisshak, Hazel A. Barton, Katey E. Bender, Harvey R. Duchene

International Journal of Speleology

Barite (BaSO4) speleothems have been reported from caves around the globe and interpreted to have chiefly formed in phreatic, hypogene, hydrothermal settings. Here we report two contrasting types of barite speleothems (bluish tabular crystals in a shallow pool and actively dripping greenish stalactites), which today form at lower temperatures in the non-hydrothermal and vadose environment of Lechuguilla Cave, New Mexico, USA. Scanning electron microscopy analysis, along with energy- and wavelength-dispersive X-ray spectroscopy (EDS, WDS), as well as X-ray diffraction (XRD), characterize the habit and chemical composition as barite. Fractionation of the minor element calcium is related to growth …

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Functional Significance Of Endothelial Sigma-1 Receptors In Vascular Reactivity And Barrier Function, Zeinab Y. Motawe Jan 2020

Functional Significance Of Endothelial Sigma-1 Receptors In Vascular Reactivity And Barrier Function, Zeinab Y. Motawe

USF Tampa Graduate Theses and Dissertations

The sigma-1 receptor (σ1) is a single 25 kD polypeptide that acts as a chaperone protein residing primarily in the endoplasmic reticulum Its interaction with mitochondria at the mitochondria-associated ER membrane domain is well-documented. Following activation, σ1 binds to the inositol trisphosphate receptor (Hayashi & Su), and modulates intracellular calcium homeostasis. Also, the activated σ1 modulates plasma membrane receptors and ion channel functions, and may regulate cellular excitability. Further, σ1 affects trafficking of lipids and proteins essential for neurotransmission, cell growth and motility. Activation of σ1 provides neuroprotection and cardio-protection in various models. Examples of neuroprotection include but not limited …

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Survey Of Histoplasma Capsulatum In Bat Guano And Status Of Histoplasmosis In Slovenia, Central Europe, Janez Mulec, Saša Simčič, Tadeja Kotar, Romina Kofol, Sanja Stopinšek Jan 2020

Survey Of Histoplasma Capsulatum In Bat Guano And Status Of Histoplasmosis In Slovenia, Central Europe, Janez Mulec, Saša Simčič, Tadeja Kotar, Romina Kofol, Sanja Stopinšek

International Journal of Speleology

There have been increasing reports on the presence of Histoplasma capsulatum in some European countries. The study investigated the presence of Histoplasma in bat guanos, speleologists with records of visiting Histoplasma-endemic regions and patients with histoplasmosis. A commercial ALPHA Histoplasma Antigen enzyme immunoassay was tested as an alternative methodology to detect Histoplasma in environment and compared with polymerase chain reaction (PCR) assays. The presence of Histoplasma antigen in bat guanos was not confirmed by PCR. Among 14 healthy speleologists, two were indicated as having the Histoplasma antigen in urine, but expressed negative PCR-specific results for the Histoplasma antigen. Five …

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Prokaryotic And Viral Community Composition Of Freshwater Springs In Florida, Usa, Kema Malki, Natalie A. Sawaya, Anna J. Székely, Michael J. Tisza, Mya Breitbart Jan 2020

Prokaryotic And Viral Community Composition Of Freshwater Springs In Florida, Usa, Kema Malki, Natalie A. Sawaya, Anna J. Székely, Michael J. Tisza, Mya Breitbart

Marine Science Faculty Publications

Aquifers, which are essential underground freshwater reservoirs worldwide, are understudied ecosystems that harbor diverse forms of microbial life. This study investigated the abundance and composition of prokaryotic and viral communities in the outflow of five springs across northern Florida, USA, as a proxy of microbial communities found in one of the most productive aquifers in the world, the Floridan aquifer. The average abundances of virus-like particles and prokaryotic cells were slightly lower than those reported from other groundwater systems, ranging from 9.6 × 103 ml−1 to 1.1 × 105 ml−1 and 2.2 × 103 ml …

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Insights Into The Bioavailability Of Oceanic Dissolved Fe From Phytoplankton Uptake Kinetics, Yeala Shaked, Kristen N. Buck, Travis Mellett, Maria. T. Maldonado Jan 2020

Insights Into The Bioavailability Of Oceanic Dissolved Fe From Phytoplankton Uptake Kinetics, Yeala Shaked, Kristen N. Buck, Travis Mellett, Maria. T. Maldonado

Marine Science Faculty Publications

Phytoplankton growth in large parts of the world ocean is limited by low availability of dissolved iron (dFe), restricting oceanic uptake of atmospheric CO2. The bioavailability of dFe in seawater is however difficult to appraise since it is bound by a variety of poorly characterized organic ligands. Here, we propose a new approach for evaluating seawater dFe bioavailability based on its uptake rate constant by Fe-limited cultured phytoplankton. We utilized seven phytoplankton species of diverse classes, sizes, and provenances to probe for dFe bioavailability in 12 seawater samples from several ocean basins and depths. All tested phytoplankton acquired …

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Understanding Of Contemporary Regional Sea-Level Change And The Implications For The Future, Benjamin D. Hamlington, Alex S. Gardner, Erik Ivins, Jan T. Lenaerts, J. T. Reager, David S. Trossman, Edward D. Zaron, Surendra Adhikari, Anthony Arendt, Andy Aschwanden, Brian D. Beckley, David P. Bekaert, Geoffrey Blewitt, Lambert Caron, Don P. Chambers, Hrishikesh A. Chandanpurkar, Knut Christianson, Beata Csatho, Richard I. Cullather, Robert M. Deconto, John T. Fasullo, Thomas Frederikse, Jeffrey T. Freymueller, Daniel M. Gilford, Manuela Girotto, William C. Hammond, Regine Hock, Nicholas Holschuh, Robert E. Kopp, Felix Landerer, Eric Larour, Dimitris Menemenlis, Mark Merrifield, Jerry X. Mitrovica, R. Steven Nerem, Isabel J. Nias, Veronica Nieves, Sophie Nowicki, Kishore Pangaluru, Christopher G. Piecuch, Richard D. Ray, David R. Rounce, Nicole-Jeanne Schlegel, Hélène Seroussi, Manoochehr Shirzaei, William V. Sweet, Isabella Velicogna, Nadya Vinogradova, Thomas Wahl, David N. Wiese, Michael J. Willis Jan 2020

Understanding Of Contemporary Regional Sea-Level Change And The Implications For The Future, Benjamin D. Hamlington, Alex S. Gardner, Erik Ivins, Jan T. Lenaerts, J. T. Reager, David S. Trossman, Edward D. Zaron, Surendra Adhikari, Anthony Arendt, Andy Aschwanden, Brian D. Beckley, David P. Bekaert, Geoffrey Blewitt, Lambert Caron, Don P. Chambers, Hrishikesh A. Chandanpurkar, Knut Christianson, Beata Csatho, Richard I. Cullather, Robert M. Deconto, John T. Fasullo, Thomas Frederikse, Jeffrey T. Freymueller, Daniel M. Gilford, Manuela Girotto, William C. Hammond, Regine Hock, Nicholas Holschuh, Robert E. Kopp, Felix Landerer, Eric Larour, Dimitris Menemenlis, Mark Merrifield, Jerry X. Mitrovica, R. Steven Nerem, Isabel J. Nias, Veronica Nieves, Sophie Nowicki, Kishore Pangaluru, Christopher G. Piecuch, Richard D. Ray, David R. Rounce, Nicole-Jeanne Schlegel, Hélène Seroussi, Manoochehr Shirzaei, William V. Sweet, Isabella Velicogna, Nadya Vinogradova, Thomas Wahl, David N. Wiese, Michael J. Willis

Marine Science Faculty Publications

Global sea level provides an important indicator of the state of the warming climate, but changes in regional sea level are most relevant for coastal communities around the world. With improvements to the sea-level observing system, the knowledge of regional sea-level change has advanced dramatically in recent years. Satellite measurements coupled with in situ observations have allowed for comprehensive study and improved understanding of the diverse set of drivers that lead to variations in sea level in space and time. Despite the advances, gaps in the understanding of contemporary sea-level change remain and inhibit the ability to predict how the …

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Revealing The Intensity Of Turbulent Energy Transfer In Planetary Atmospheres, Simon Cabanes, Stefania Espa, Boris Galperin, Roland M. Young, Peter L. Read Jan 2020

Revealing The Intensity Of Turbulent Energy Transfer In Planetary Atmospheres, Simon Cabanes, Stefania Espa, Boris Galperin, Roland M. Young, Peter L. Read

Marine Science Faculty Publications

Images of the giant planets Jupiter and Saturn show highly turbulent storms and swirling clouds that reflect the intensity of turbulence in their atmospheres. Quantifying planetary turbulence is inaccessible to conventional tools, however, since they require large quantities of spatially and temporally resolved data. Here we show, using experiments, observations, and simulations, that potential vorticity (PV) is a straightforward and universal diagnostic that can be used to estimate turbulent energy transfer in a stably stratified atmosphere. We use the conservation of PV to define a length scale, LM, representing a typical distance over which PV is mixed by planetary turbulence. …

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Eddy–Wave Duality In A Rotating Flow, Stefania Espa, Simon Cabanes, Gregory P. King, Gabriella Nitto, Boris Galperin Jan 2020

Eddy–Wave Duality In A Rotating Flow, Stefania Espa, Simon Cabanes, Gregory P. King, Gabriella Nitto, Boris Galperin

Marine Science Faculty Publications

A series of experiments with rotating, electromagnetically forced, turbulent flows were carried out at the Sapienza University of Rome to investigate the eddy–wave duality in flows with a β-effect and the electromagnetic force acting in the westward direction. When the β-effect is significant, i.e., as in planetary atmospheric and oceanic circulations, nonlinear eddy/wave interactions facilitate flow self-organization into zonal patterns in which Rossby waves and westward propagating cyclonic and anticyclonic eddies coexist. Upon time averaging, eddies disappear and the flow pattern transforms into a system of alternating zonal jets. What is the relationship between eddies, jets, and Rossby …

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New Gravity-Derived Bathymetry For The Thwaites, Crosson, And Dotson Ice Shelves Revealing Two Ice Shelf Populations, Tom A. Jordan, David Porter, Kirsty Tinto, Romain Millan, Atsuhiro Muto, Kelly Hogan, Robert D. Larter, Alastair G. Graham, John D. Paden Jan 2020

New Gravity-Derived Bathymetry For The Thwaites, Crosson, And Dotson Ice Shelves Revealing Two Ice Shelf Populations, Tom A. Jordan, David Porter, Kirsty Tinto, Romain Millan, Atsuhiro Muto, Kelly Hogan, Robert D. Larter, Alastair G. Graham, John D. Paden

Marine Science Faculty Publications

Ice shelves play a critical role in the long-term stability of ice sheets through their buttressing effect. The underlying bathymetry and cavity thickness are key inputs for modelling future ice sheet evolution. However, direct observation of sub-ice-shelf bathymetry is time-consuming, logistically risky, and in some areas simply not possible. Here we use new compilations of airborne and marine gravity, radar depth sounding, and swath bathymetry to provide new estimates of sub-ice-shelf bathymetry outboard of the rapidly changing West Antarctic Thwaites Glacier and beneath the adjacent Dotson and Crosson ice shelves. This region is of special interest, as the low-lying inland …

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Geospatial Simulations Of Airborne Ice-Penetrating Radar Surveying Reveal Elevation Under-Measurement Bias For Ice-Sheet Bed Topography, Oliver T. Bartlett, Steven J. Palmer, Dustin M. Schroeder, Emma J. Mackie, Timothy T. Barrows, Alastair G. Graham Jan 2020

Geospatial Simulations Of Airborne Ice-Penetrating Radar Surveying Reveal Elevation Under-Measurement Bias For Ice-Sheet Bed Topography, Oliver T. Bartlett, Steven J. Palmer, Dustin M. Schroeder, Emma J. Mackie, Timothy T. Barrows, Alastair G. Graham

Marine Science Faculty Publications

Airborne radio-echo sounding (RES) surveys are widely used to measure ice-sheet bed topography. Measuring bed topography as accurately and widely as possible is of critical importance to modelling ice dynamics and hence to constraining better future ice response to climate change. Measurement accuracy of RES surveys is influenced both by the geometry of bed topography and the survey design. Here we develop a novel approach for simulating RES surveys over glaciated terrain, to quantify the sensitivity of derived bed elevation to topographic geometry. Furthermore, we investigate how measurement errors influence the quantification of glacial valley geometry. We find a negative …

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Revealing The Former Bed Of Thwaites Glacier Using Sea-Floor Bathymetry: Implications For Warm-Water Routing And Bed Controls On Ice Flow And Buttressing, Kelly A. Hogan, Robert D. Larter, Alastair G. Graham, Robert Arthern, James D. Kirkham, Minzoni, Rebecca Totten Minzoni, Tom A. Jordan, Rachel Clark, Victoria Fitzgerald, Anna K. Wåhlin, John B. Anderson, Claus-Dieter Hillenbrand, Frank O. Nitsche, Lauren Simkins, James A. Smith, Karsten Gohl, Jan Erik Arndt, Jongkuk Hong, Julia Wellner Jan 2020

Revealing The Former Bed Of Thwaites Glacier Using Sea-Floor Bathymetry: Implications For Warm-Water Routing And Bed Controls On Ice Flow And Buttressing, Kelly A. Hogan, Robert D. Larter, Alastair G. Graham, Robert Arthern, James D. Kirkham, Minzoni, Rebecca Totten Minzoni, Tom A. Jordan, Rachel Clark, Victoria Fitzgerald, Anna K. Wåhlin, John B. Anderson, Claus-Dieter Hillenbrand, Frank O. Nitsche, Lauren Simkins, James A. Smith, Karsten Gohl, Jan Erik Arndt, Jongkuk Hong, Julia Wellner

Marine Science Faculty Publications

The geometry of the sea floor immediately beyond Antarctica’s marine-terminating glaciers is a fundamental control on warm-water routing, but it also describes former topographic pinning points that have been important for ice-shelf buttressing. Unfortunately, this information is often lacking due to the inaccessibility of these areas for survey, leading to modelled or interpolated bathymetries being used as boundary conditions in numerical modelling simulations. At Thwaites Glacier (TG) this critical data gap was addressed in 2019 during the first cruise of the International Thwaites Glacier Collaboration (ITGC) project. We present more than 2000 km2 of new multibeam echo-sounder (MBES) data acquired …

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Dynamic Satellite Seascapes As A Biogeographic Framework For Understanding Phytoplankton Assemblages In The Florida Keys National Marine Sanctuary, United States, Enrique Montes, Anni Djurhuus, Frank E. Muller-Karger, Daniel Otis, Christopher R. Kelble, Maria T. Kavanaugh Jan 2020

Dynamic Satellite Seascapes As A Biogeographic Framework For Understanding Phytoplankton Assemblages In The Florida Keys National Marine Sanctuary, United States, Enrique Montes, Anni Djurhuus, Frank E. Muller-Karger, Daniel Otis, Christopher R. Kelble, Maria T. Kavanaugh

Marine Science Faculty Publications

Physical, chemical, geological, and biological factors interact in marine environments to shape complex but recurrent patterns of organization of life on multiple spatial and temporal scales. These factors define biogeographic regions in surface waters that we refer to as seascapes. We characterize seascapes for the Florida Keys National Marine Sanctuary (FKNMS) and southwest Florida shelf nearshore environment using multivariate satellite and in situ measurements of Essential Ocean Variables (EOVs) and Essential Biodiversity Variables (EBVs). The study focuses on three periods that cover separate oceanographic expeditions (March 11–18, May 9–13, and September 12–19, 2016). We collected observations on bio-optical parameters (particulate …

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Stakeholder Participation In Ipbes: Connecting Local Environmental Work With Global Decision Making, Cornelia B. Krug, Eleanor Sterling, Timothy Cadman, Jonas Geschke, Paula F. Drummond De Castro, Rainer Schliep, Isimemen Osemwegie, Frank E. Muller-Karger, Tek Maraseni Jan 2020

Stakeholder Participation In Ipbes: Connecting Local Environmental Work With Global Decision Making, Cornelia B. Krug, Eleanor Sterling, Timothy Cadman, Jonas Geschke, Paula F. Drummond De Castro, Rainer Schliep, Isimemen Osemwegie, Frank E. Muller-Karger, Tek Maraseni

Marine Science Faculty Publications

The Intergovernmental Science-Policy Platform on Biodiversity and Ecosystem Services(IPBES) strengthens the science-policy interface by producing scientific assessments on biodiversity and ecosystem services to inform policy. IPBES fosters knowledge exchange across disciplines, between researchers and other knowledge holders, practitioners, societal actors and decision makers working at different geographic scales. A number of avenues for participation of stakeholders across the four functions if IPBES exist. Stakeholders come from diverse backgrounds, including Indigenous Peoples and local communities, businesses, and non-governmental organization. They represent multiple sources of information, data, knowledge, and perspectives on biodiversity. Stakeholder engagement in IPBES seeks to 1. communicate, disseminate, and …

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Automated High-Resolution Time Series Mapping Of Mangrove Forests Damaged By Hurricane Irma In Southwest Florida, Matthew J. Mccarthy, Brita Jessen, Michael J. Barry, Marissa Figueroa, Jessica Mcintosh, Tylar Murray, Jill Schmid, Frank E. Muller-Karger Jan 2020

Automated High-Resolution Time Series Mapping Of Mangrove Forests Damaged By Hurricane Irma In Southwest Florida, Matthew J. Mccarthy, Brita Jessen, Michael J. Barry, Marissa Figueroa, Jessica Mcintosh, Tylar Murray, Jill Schmid, Frank E. Muller-Karger

Marine Science Faculty Publications

In September of 2017, Hurricane Irma made landfall within the Rookery Bay National Estuarine Research Reserve of southwest Florida (USA) as a category 3 storm with winds in excess of 200 km h−1. We mapped the extent of the hurricane’s impact on coastal land cover with a seasonal time series of satellite imagery. Very high-resolution (i.e., <5 m pixel) satellite imagery has proven effective to map wetland ecosystems, but challenges in data acquisition and storage, algorithm training, and image processing have prevented large-scale and time-series mapping of these data. We describe our approach to address these issues to evaluate Rookery Bay ecosystem damage and recovery using 91 WorldView-2 satellite images collected between 2010 and 2018 mapped using automated techniques and validated with a field campaign. Land cover was classified seasonally at 2 m resolution (i.e., healthy mangrove, degraded mangrove, upland, soil, and water) with an overall accuracy of 82%. Digital change detection methods show that hurricane-related degradation was 17% of mangrove forest (~5 km2). Approximately 35% (1.7 km2) of this loss recovered one year after Hurricane Irma. The approach completed the mapping approximately 200 times faster than existing methods, illustrating the ease with which regional high-resolution mapping may be accomplished efficiently.

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Supporting The Essential - Recommendations For The Development Of Accessible And Interoperable Marine Biological Data Products, D. Lear, P. Herman, G. Van Hoey, L. Schepers, N. Tonné, M. Lipizer, F. E. Muller-Karger, W. Appeltans, W. D. Kissling, N. Holdsworth, M. Edwards, E. Pecceu, H. Nygård, G. Canonico, S. Birchenough, G. Graham, K. Deneudt, S. Claus, P. Oset Jan 2020

Supporting The Essential - Recommendations For The Development Of Accessible And Interoperable Marine Biological Data Products, D. Lear, P. Herman, G. Van Hoey, L. Schepers, N. Tonné, M. Lipizer, F. E. Muller-Karger, W. Appeltans, W. D. Kissling, N. Holdsworth, M. Edwards, E. Pecceu, H. Nygård, G. Canonico, S. Birchenough, G. Graham, K. Deneudt, S. Claus, P. Oset

Marine Science Faculty Publications

In this paper we outline the stakeholder-led approaches in the development of biological data products to support effective conservation, management and policy development. The requirements of a broad range of stakeholders and iterative, structured processes framed the development of tools, models and maps that support the FAIR (Findable, Accessible, Interoperable, Reusable) data principles. By structuring the resultant data products around the emerging biological Essential Ocean Variables, and through the engagement with a broad range of end-users, the EMODnet (European Marine Observation and Data Network) Biology project has delivered a suite of demonstration data products. These products are presented in the …

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Altered Tropical Seascapes Influence Patterns Of Fish Assemblage And Ecological Functions In The Western Indian Ocean, D. H. Chacin, C. D. Stallings, M. Eggertsen, C. Åkerlund, C. Halling, C. Berkström Jan 2020

Altered Tropical Seascapes Influence Patterns Of Fish Assemblage And Ecological Functions In The Western Indian Ocean, D. H. Chacin, C. D. Stallings, M. Eggertsen, C. Åkerlund, C. Halling, C. Berkström

Marine Science Faculty Publications

The arrangement and composition of habitats within landscapes and fine-scale habitat characteristics influence community structure and ecological processes. These aspects can be altered by anthropogenic activities, thus influencing associated assemblages. Farming of macroalgae is a common practice in tropical settings and alters the natural composition of seascapes by introducing monoculture patches. The farmed macroalgae may also differ in palatability compared to naturally-occurring macroalgae, influencing herbivory. This study assessed how these farms may differ from natural macroalgal beds in terms of habitat heterogeneity, fish assemblages, and herbivory. We surveyed fish assemblages and deployed macroalgal assays within macroalgal beds, farms and at …

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Climate-Driven Aerobic Habitat Loss In The California Current System, Evan M. Howard, Justin L. Penn, Hartmut Frenzel, Brad A. Seibel, Daniele Bianchi, Lionel Renault, Fayçal Kessouri, Martha A. Sutula, James C. Mcwilliams, Curtis Deutsch Jan 2020

Climate-Driven Aerobic Habitat Loss In The California Current System, Evan M. Howard, Justin L. Penn, Hartmut Frenzel, Brad A. Seibel, Daniele Bianchi, Lionel Renault, Fayçal Kessouri, Martha A. Sutula, James C. Mcwilliams, Curtis Deutsch

Marine Science Faculty Publications

Climate warming is expected to intensify hypoxia in the California Current System (CCS), threatening its diverse and productive marine ecosystem. We analyzed past regional variability and future changes in the Metabolic Index (Φ), a species-specific measure of the environment’s capacity to meet temperature-dependent organismal oxygen demand. Across the traits of diverse animals, Φ exhibits strong seasonal to interdecadal variations throughout the CCS, implying that resident species already experience large fluctuations in available aerobic habitat. For a key CCS species, northern anchovy, the long-term biogeographic distribution and decadal fluctuations in abundance are both highly coherent with aerobic habitat volume. Ocean warming …

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Ocean Deoxygenation And Copepods: Coping With Oxygen Minimum Zone Variability, Karen F. Wishner, Brad Seibel, Dawn Outram Jan 2020

Ocean Deoxygenation And Copepods: Coping With Oxygen Minimum Zone Variability, Karen F. Wishner, Brad Seibel, Dawn Outram

Marine Science Faculty Publications

Increasing deoxygenation (loss of oxygen) of the ocean, including expansion of oxygen minimum zones (OMZs), is a potentially important consequence of global warming. We examined present-day variability of vertical distributions of 23 calanoid copepod species in the Eastern Tropical North Pacific (ETNP) living in locations with different water column oxygen profiles and OMZ intensity (lowest oxygen concentration and its vertical extent in a profile). Copepods and hydrographic data were collected in vertically stratified day and night MOCNESS (Multiple Opening/Closing Net and Environmental Sensing System) tows (0–1000 m) during four cruises over a decade (2007–2017) that sampled four ETNP locations: Costa …

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Increasing Rates Of Carbon Burial In Southwest Florida Coastal Wetlands, Joshua L. Breithaupt, Joseph M. Smoak, Thomas S. Bianchi, Derrick R. Vaughn, Christian J. Sanders, Kara R. Radabaugh, Michael J. Osland, Laura C. Feher, James C. Lynch, Donald R. Cahoon, Gordon H. Anderson, Kevin R.T. Whelan, Brad E. Rosenheim, Ryan P. Moyer, Lisa G. Chambers Jan 2020

Increasing Rates Of Carbon Burial In Southwest Florida Coastal Wetlands, Joshua L. Breithaupt, Joseph M. Smoak, Thomas S. Bianchi, Derrick R. Vaughn, Christian J. Sanders, Kara R. Radabaugh, Michael J. Osland, Laura C. Feher, James C. Lynch, Donald R. Cahoon, Gordon H. Anderson, Kevin R.T. Whelan, Brad E. Rosenheim, Ryan P. Moyer, Lisa G. Chambers

Marine Science Faculty Publications

Rates of organic carbon (OC) burial in some coastal wetlands appear to be greater in recent years than they were in the past. Possible explanations include ongoing mineralization of older OC or the influence of an unaccounted-for artifact of the methods used to measure burial rates. Alternatively, the trend may represent real acceleration in OC burial. We quantified OC burial rates of mangrove and coastal freshwater marshes in southwest Florida through a comparison of rates derived from 210Pb, 137Cs, and surface marker horizons. Age/depth profiles of lignin: OC were used to assess whether down-core remineralization had depleted the …

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Paleoceanography: Lessons For A Changing World, Amelia Shevenell, Peggy Delaney, Katrin Meissner, Laurie Menviel, Alan C. Mix Jan 2020

Paleoceanography: Lessons For A Changing World, Amelia Shevenell, Peggy Delaney, Katrin Meissner, Laurie Menviel, Alan C. Mix

Marine Science Faculty Publications

No abstract provided.

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Trace Metal And Nutrient Dynamics Across Broad Biogeochemical Gradients In The Indian And Pacific Sectors Of The Southern Ocean, David J. Janssen, Matthias Sieber, Michael J. Ellwood, Tim M. Conway, Pamela M. Barrett, Xiaoyu Chen, Gregory F. De Souza, Christel S. Hassler, Samuel L. Jaccard Jan 2020

Trace Metal And Nutrient Dynamics Across Broad Biogeochemical Gradients In The Indian And Pacific Sectors Of The Southern Ocean, David J. Janssen, Matthias Sieber, Michael J. Ellwood, Tim M. Conway, Pamela M. Barrett, Xiaoyu Chen, Gregory F. De Souza, Christel S. Hassler, Samuel L. Jaccard

Marine Science Faculty Publications

The Southern Ocean is the largest high-nutrient low-chlorophyll environment in the global ocean, and represents an important source of intermediate and deep waters to lower latitudes. Constraining Southern Ocean trace metal biogeochemical cycling is therefore important not just for understanding biological productivity and carbon cycling regionally, but also for understanding trace metal distributions throughout the lower latitude oceans. We present dissolved Fe, Ni, Cu, Zn, Cd, Pb and macronutrient concentrations in the Indian and Pacific sectors of the Southern Ocean from the Antarctic Circumnavigation Expedition (austral summer 2016-17), which included the first opportunities to study trace metal cycling at the …

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Cliff Feature Delineation Tool And Baseline Builder Tool, Version 1.0 User Guide, Alexander C. Seymour, Cheryl J. Hapke, Jonathan Warrick Jan 2020

Cliff Feature Delineation Tool And Baseline Builder Tool, Version 1.0 User Guide, Alexander C. Seymour, Cheryl J. Hapke, Jonathan Warrick

Marine Science Faculty Publications

Coastal cliffs constitute 80 percent of the world’s coastline, with seacliffs fronting a large proportion of the U.S. West Coast shoreline, particularly in California. Erosion of coastal cliffs can threaten infrastructure and human life, yet the spatial and temporal scope of cliff studies have been limited by cumbersome traditional methods that rely on the manual interpretation of seacliff features—especially seacliff toes and top edges. The Cliff Feature Delineation Tool (CFDT) and the Baseline Builder Tool are designed to increase the efficiency of deriving seacliff features from remote sensing datasets by utilizing an automated, quantitative approach that eliminates traditional interpretive methods …

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The First Global Deep-Sea Stable Isotope Assessment Reveals The Unique Trophic Ecology Of Vampire Squid Vampyroteuthis Infernalis (Cephalopoda), A. V. Golikov, F. R. Ceia, R. M. Sabirov, J. D. Ablett, Ian G. Gleadall, Gudmundur Gudmundsson, Henk-Jan T. Hoving, Heather L. Judkins Jan 2020

The First Global Deep-Sea Stable Isotope Assessment Reveals The Unique Trophic Ecology Of Vampire Squid Vampyroteuthis Infernalis (Cephalopoda), A. V. Golikov, F. R. Ceia, R. M. Sabirov, J. D. Ablett, Ian G. Gleadall, Gudmundur Gudmundsson, Henk-Jan T. Hoving, Heather L. Judkins

USF St. Petersburg Campus Faculty Publications

Vampyroteuthis infernalis Chun, 1903, is a widely distributed deepwater cephalopod with unique morphology and phylogenetic position. We assessed its habitat and trophic ecology on a global scale via stable isotope analyses of a unique collection of beaks from 104 specimens from the Atlantic, Pacific and Indian Oceans. Cephalopods typically are active predators occupying a high trophic level (TL) and exhibit an ontogenetic increase in δ15N and TL. Our results, presenting the first global comparison for a deep-sea invertebrate, demonstrate that V. infernalis has an ontogenetic decrease in δ15N and TL, coupled with niche broadening. Juveniles are mobile zooplanktivores, while larger …

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Temporal Variability Of Polycyclic Aromatic Hydrocarbons In Deep-Sea Cephalopods Of The Northern Gulf Of Mexico, Isabel C. Romero, Heather L. Judkins, Michael Vecchione Jan 2020

Temporal Variability Of Polycyclic Aromatic Hydrocarbons In Deep-Sea Cephalopods Of The Northern Gulf Of Mexico, Isabel C. Romero, Heather L. Judkins, Michael Vecchione

USF St. Petersburg Campus Faculty Publications

As part of the effort to understand the effects of the Deepwater Horizon Oil Spill (DWHOS), we analyzed tissue from five species of midwater oceanic cephalopods in the northern Gulf of Mexico (GoM) during three time periods, including one period sampled fortuitously just before the spill (2010), and two periods sampled after the spill (2011 and 2015–2016). The species, Japetella diaphana, Abralia redfieldi, Histioteuthis corona, Leachia atlantica, and Onychoteuthis banksii were collected in three geographic areas in the GoM (east, south and southeast of the Macondo wellhead). Results indicate a shift in the composition of polycyclic aromatic hydrocarbons (PAHs) in …

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Bioaccumulation And Biomagnification Of Potential Toxic Elements (Ptes): An Avicennia Germinans–Uca Rapax Trophic Transfer Story From Jobos Bay, Puerto Rico, Michael Martinez-Colon, Henry Alegria, Hatice Kubra-Gul, Ashley Huber, Perihan Kurt-Karakus Jan 2020

Bioaccumulation And Biomagnification Of Potential Toxic Elements (Ptes): An Avicennia Germinans–Uca Rapax Trophic Transfer Story From Jobos Bay, Puerto Rico, Michael Martinez-Colon, Henry Alegria, Hatice Kubra-Gul, Ashley Huber, Perihan Kurt-Karakus

USF St. Petersburg Campus Faculty Publications

In southern Puerto Rico along the coastline bordering the Jobos Bay National Estuarine Research Reserve, environmental encroachment has exposed mangrove forest to different sources of pollution. Potentially toxic element concentrations from the F1Tess (exchangeable), F4Tess (oxidizable), mangrove leaf litter (MLL), and fiddler crab whole body soft tissue were analyzed to assess the fate and transport of pollutants from the environment and its transition into flora-fauna via trophic transfer. Geo-accumulation factor values suggest the bay has experienced limited to no pollution when combining the concentrations of potentially toxic elements extracted from the F1Tess and F4Tess sediment fractions. These geochemical sedimentary compartments …

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