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566 results on '"Joye, Samantha B"'

2. Expanding our view of the cold-water coral niche and accounting of the ecosystem services of the reef habitat

Author

Cordes, Erik E., Demopoulos, Amanda W. J., Davies, Andrew J., Gasbarro, Ryan, Rhoads, Alexandria C., Lobecker, Elizabeth, Sowers, Derek, Chaytor, Jason D., Morrison, Cheryl L., Weinnig, Alexis M., Brooke, Sandra, Lunden, Jay J., Mienis, Furu, Joye, Samantha B., Quattrini, Andrea M., Sutton, Tracey T., McFadden, Catherine S., Bourque, Jill R., McClain-Counts, Jennifer P., Andrews, Brian D., Betters, Melissa J., Etnoyer, Peter J., Wolff, Gary A., Bernard, Bernie B., Brooks, James M., Rasser, Michael K., and Adams, Caitlin

Published
2023
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4. The Open-Ocean Gulf of Mexico After Deepwater Horizon: Synthesis of a Decade of Research

Author

Sutton, Tracey T, Milligan, Rosanna J, Daly, Kendra, Boswell, Kevin M, Cook, April B, Cornic, Maëlle, Frank, Tamara, Frasier, Kaitlin, Hahn, Daniel, Hernandez, Frank, Hildebrand, John, Hu, Chuanmin, Johnston, Matthew W, Joye, Samantha B, Judkins, Heather, Moore, Jon A, Murawski, Steven A, Pruzinsky, Nina M, Quinlan, John A, Remsen, Andrew, Robinson, Kelly L, Romero, Isabel C, Rooker, Jay R, Vecchione, Michael, and Wells, RJ David

Subjects
Earth Sciences, Oceanography, epipelagic, mesopelagic, bathypelagic, oil spill accident, pollution, deep sea, Ecology, Geology
Abstract

The scale of the Deepwater Horizon disaster was and is unprecedented: geographic extent, pollutant amount, countermeasure scope, and of most relevance to this Research Topic issue, range of ecotypes affected. These ecotypes include coastal/nearshore, continental shelf, deep benthic, and open-ocean domains, the last of which is the subject of this synthesis. The open-ocean ecotype comprises ~90% of the volume of the Gulf of Mexico. The exact percentage of this ecotype contaminated with toxins is unknown due to its three-dimensional nature and dynamics, but estimates suggest that the footprint encompassed most of its eastern half. Further, interactions between the water column and the deep benthos may be persistent, making this synthesis one of time (a decade) rather than event conclusion. Here we examine key elements of the open-ocean ecosystem, with emphasis on vulnerability and resilience. Of paramount importance relative to the Gulf nearshore and shelf ecotypes, pre-disaster baseline data were lacking for most of the fauna. In such cases, inferences were drawn from post-disaster assessments. Both phytoplankton and mesozooplankton vulnerabilities were quite high, but resilience appeared equally so. The phytoplankton situation was a bit more complex in that toxin-imposed reductions may have been offset by nutrient injection via high freshwater discharge in 2010. Intermediate trophic levels exhibited population-level depressions, ostensibly due to high vulnerability and low resilience. Apex predator impacts were variable. Certain large epipelagic fishes may have avoided the highest concentrations of hydrocarbons/dispersant, and thus larval abundances returned to pre-disaster levels of variability and abundance within a few years after a steep initial decline. Oceanic cetaceans, particularly shallow-diving stenellid dolphins, did not appear to avoid oiled waters and exhibited strong declines in the northern Gulf. Given that population declines of many open-ocean taxa appear to be ongoing a decade later, we conclude that this largest of Gulf ecosystem components, like its deep-benthic counterpart, is as fragile as it is voluminous. This is particularly concerning given the rapid, and likely irreversible, shift to deeper waters by the US and Mexican oil industries in concert with the higher likelihood of accidents with increasing platform depth.

Published
2022

5. Ideas and perspectives: A strategic assessment of methane and nitrous oxide measurements in the marine environment

Author

Wilson, Samuel T, Al-Haj, Alia N, Bourbonnais, Annie, Frey, Claudia, Fulweiler, Robinson W, Kessler, John D, Marchant, Hannah K, Milucka, Jana, Ray, Nicholas E, Suntharalingham, Parv, Thornton, Brett F, Upstill-Goddard, Robert C, Weber, Thomas S, Arévalo-Martínez, Damian L, Bange, Hermann W, Benway, Heather M, Bianchi, Daniele, Borges, Alberto V, Chang, Bonnie X, Crill, Patrick M, del Valle, Daniela A, Farías, Laura, Joye, Samantha B, Kock, Annette, Labidi, Jabrane, Manning, Cara C, Pohlman, John W, Rehder, Gregor, Sparrow, Katy J, Tortell, Philippe D, Treude, Tina, Valentine, David L, Ward, Bess B, Yang, Simon, and Yurganov, Leonid N

Subjects
Life Below Water, Earth Sciences, Environmental Sciences, Biological Sciences, Meteorology & Atmospheric Sciences
Abstract

In the current era of rapid climate change, accurate characterization of climate-relevant gas dynamics-namely production, consumption, and net emissions-is required for all biomes, especially those ecosystems most susceptible to the impact of change. Marine environments include regions that act as net sources or sinks for numerous climateactive trace gases including methane (CH4) and nitrous oxide (N2O). The temporal and spatial distributions of CH4 and N2O are controlled by the interaction of complex biogeochemical and physical processes. To evaluate and quantify how these mechanisms affect marine CH4 and N2O cycling requires a combination of traditional scientific disciplines including oceanography, microbiology, and numerical modeling. Fundamental to these efforts is ensuring that the datasets produced by independent scientists are comparable and interoperable. Equally critical is transparent communication within the research community about the technical improvements required to increase our collective understanding of marine CH4 and N2O. A workshop sponsored by Ocean Carbon and Biogeochemistry (OCB) was organized to enhance dialogue and collaborations pertaining to marine CH4 and N2O. Here, we summarize the outcomes from the workshop to describe the challenges and opportunities for near-future CH4 and N2O research in the marine environment.

Published
2020

7. A global atlas of subsurface microbiomes reveals phylogenetic novelty, large scale biodiversity gradients, and a marine-terrestrial divide

Author

Ruff, S. Emil, primary, Hrabe de Angelis, Isabella C, additional, Mullis, Megan, additional, Payet, Jérôme P, additional, Magnabosco, Cara, additional, Lloyd, Karen G, additional, Sheik, Cody, additional, Steen, Andrew D, additional, Shipunova, Anna, additional, Morozov, Aleksey, additional, Kiel Reese, Brandi, additional, Bradley, James A, additional, Lemonnier, Clarisse, additional, Schrenk, Matthew O, additional, Joye, Samantha B, additional, Huber, Julie A, additional, Probst, Alexander J, additional, Morrison, Hilary G, additional, Sogin, Mitchell L, additional, Ladau, Joshua, additional, and Colwell, Frederick, additional

Published
2024
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9. The Gulf of Mexico : AN OVERVIEW

Author

McKinney, Larry D., Shepherd, John G., Wilson, Charles A., Hogarth, William T., Chanton, Jeff, Murawski, Steven A., Sandifer, Paul A., Sutton, Tracey, Yoskowitz, David, Wowk, Katya, Özgökmen, Tamay M., Joye, Samantha B., and Caffey, Rex

Published
2021

12. Biodegradation of Petroleum Hydrocarbons in the Deep Sea

Author

Kostka, Joel E., Joye, Samantha B., Overholt, Will, Bubenheim, Paul, Hackbusch, Steffen, Larter, Stephen R., Liese, Andreas, Lincoln, Sara A., Marietou, Angeliki, Müller, Rudolf, Noirungsee, Nuttapol, Oldenburg, Thomas B. P., Radović, Jagoš R., Viamonte, Juan, Murawski, Steven A., editor, Ainsworth, Cameron H., editor, Gilbert, Sherryl, editor, Hollander, David J., editor, Paris, Claire B., editor, Schlüter, Michael, editor, and Wetzel, Dana L., editor

Published
2020
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16. Global Aerobic Degradation of Hydrocarbons in Aquatic Systems

Author

Kleindienst, Sara, Joye, Samantha B., Timmis, Kenneth N., Editor-in-Chief, Boll, Matthias, Series Editor, Geiger, Otto, Series Editor, Goldfine, Howard, Series Editor, Krell, Tino, Series Editor, Lee, Sang Yup, Series Editor, McGenity, Terry J., Series Editor, Rojo, Fernando, Series Editor, Sousa, Diana Z, Series Editor, Stams, Alfons J. M., Series Editor, Steffan, Robert, Series Editor, and Wilkes, Heinz, Series Editor

Published
2019
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20. Physicochemical Perturbation Increases Nitrous Oxide Production in Soils and Sediments.

Author

Weston, Nathaniel B., Troy, Cynthia, Kearns, Patrick J., Bowen, Jennifer L., Porubsky, William, Hyacinthe, Christelle, Meile, Christof, Cappellen, Philippe Van, and Joye, Samantha B.

Subjects
NITROUS oxide, OZONE layer depletion, ATMOSPHERIC nitrous oxide, SALT marshes, ESTUARINE sediments, MARSHES
Abstract

Atmospheric concentrations of nitrous oxide (N2O), a potent greenhouse gas that is also responsible for significant stratospheric ozone depletion, have increased in response to intensified use of agricultural fertilizers and other human activities that have accelerated nitrogen cycling processes. Microbial denitrification in soils and sediments is a major source of N2O, produced as an intermediate during the reduction of oxidized forms of nitrogen to dinitrogen gas (N2). Substrate availability (nitrate and organic matter) and environmental factors such as oxygen levels, temperature, moisture, and pH influence rates of denitrification and N2O production. Here we describe the role of physicochemical perturbation (defined here as a change from the ambient environmental conditions) on denitrification and N2O production. Changes in salinity, temperature, moisture, pH, and zinc in agricultural soils induced a short-term perturbation response characterized by lower rates of total denitrification and higher rates of net N2O production. The N2O to total denitrification ratio (N2O : DNF) increased strongly with physicochemical perturbation. A salinity press experiment on tidal freshwater marsh soils revealed that increased N2O production was likely driven by transcriptional inhibition of the nitrous oxide reductase (nos) gene, and that the microbial community adapted to altered salinity over a relatively short (within one month) timeframe. Perturbation appeared to confer resilience to subsequent disturbance, and denitrifiers from an environment without salinity fluctuations (tidal freshwater estuarine sediments) demonstrated a stronger N2O perturbation response than denitrifiers from environments with more variable salinity (oligohaline and mesohaline estuarine sediments), suggesting that the denitrifying community from physicochemically stable environments may have a stronger perturbation response. These findings provide a framework for improving our understanding of the dynamic nature of N2O production in soils and sediments, in which changes in physical and/or chemical conditions initiate a short-term perturbation response that promotes N2O production that moderates over time and with subsequent physicochemical perturbation. [ABSTRACT FROM AUTHOR]

Published
2024
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31. Vulnerability and resilience of living marine resources to the Deepwater Horizon oil spill: an overview

Author

Murawski, Steven A., primary, Schwing, Patrick T., additional, Patterson, William F., additional, Sutton, Tracey T., additional, Montagna, Paul A., additional, Milligan, Rosanna J., additional, Joye, Samantha B., additional, Thomas, Len, additional, Kilborn, Joshua P., additional, Paris, Claire B., additional, Faillettaz, Robin, additional, Portnoy, David S., additional, and Gilbert, Sherryl, additional

Published
2023
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33. Biodegradation of Petroleum Hydrocarbons in the Deep Sea

Author

Kostka, Joel E., primary, Joye, Samantha B., additional, Overholt, Will, additional, Bubenheim, Paul, additional, Hackbusch, Steffen, additional, Larter, Stephen R., additional, Liese, Andreas, additional, Lincoln, Sara A., additional, Marietou, Angeliki, additional, Müller, Rudolf, additional, Noirungsee, Nuttapol, additional, Oldenburg, Thomas B. P., additional, Radović, Jagoš R., additional, and Viamonte, Juan, additional

Published
2019
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34. Vulnerability and resilience of living marine resources to the Deepwater Horizon oil spill: an overview

Author

Murawski, Steven A., Schwing, Patrick T., Patterson, William F., Sutton, Tracey T., Montagna, Paul A., Milligan, Rosanna J., Joye, Samantha B., Thomas, Len, Kilborn, Joshua P., Paris, Claire B., Faillettaz, Robin, Portnoy, David S., and Gilbert, Sherryl

Subjects
Gulf of Mexico, ecosystem vulnerability, ecosystem resilience, Deepwater Horizon, marine oil spills
Abstract

The 2010 Deepwater Horizon (DWH) oil well blowout in the Gulf of Mexico (GoM) was the largest and perhaps most consequential accidental marine oil spill in global history. This paper provides an overview of a Research Topic consisting of four additional papers that: (1) assemble time series data for ecosystem components in regions impacted by the spill, and (2) interpret temporal changes related to the vulnerability of species and ecosystems to DWH and the ensuing resilience to perturbation. Time series abundance data for many taxa pre-date DWH, often by decades, thus allowing an assessment of population- and community-level impacts. We divided the north central GoM into four interconnected “eco-types”: the coastal/nearshore, continental shelf, open-ocean pelagic and deep benthic. Key taxa in each eco-type were evaluated for their vulnerability to the circumstances of the DWH spill based on population overlap with oil, susceptibility to oil contamination, and other factors, as well their imputed resilience to population-level impacts, based on life history metrics, ecology and post-spill trajectories. Each taxon was scored as low, medium, or high for 13 vulnerability attributes and 11 resilience attributes to produce overall vulnerability and resilience scores, which themselves were also categorical (i.e., low, medium, or high). The resulting taxon-specific V-R scores provide important guidance on key species to consider and monitor in the event of future spills similar to DWH. Similar analyses may also guide resource allocation to collect baseline data on highly vulnerable taxa or those with low resilience potential in other ecosystems. For some species, even a decade of observation has been insufficient to document recovery given chronic, long-term exposure to DWH oil remaining in all eco-types and because of impacts to the reproductive output of long-lived species. Due to the ongoing threats of deep-water blowouts, continued surveillance of populations affected by DWH is warranted to document long-term recovery or change in system state. The level of population monitoring in the open-ocean and deep benthic eco-types has historically been low and is inconsistent with the continued migration of the oil industry to the ultra-deep (≥1,500 m) where the majority of leasing, exploration, and production now occurs.

Published
2023

40. Characteristics and Evolution of sill-driven off-axis hydrothermalism in Guaymas Basin – the Ringvent site

Author

Teske, Andreas, McKay, Luke J., Ravelo, Ana Christina, Aiello, Ivano, Mortera, Carlos, Núñez-Useche, Fernando, Canet, Carles, Chanton, Jeffrey P., Brunner, Benjamin, Hensen, Christian, Ramírez, Gustavo A., Sibert, Ryan J., Turner, Tiffany, White, Dylan, Chambers, Christopher R., Buckley, Andrew, Joye, Samantha B., Soule, S. Adam, and Lizarralde, Daniel

Published
2019
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