A5027239545- Geology and Paleoclimatology Research
- Marine Biology and Ecology Research
- Methane Hydrates and Related Phenomena
- Isotope Analysis in Ecology
- Microbial Community Ecology and Physiology
- Marine and coastal ecosystems
- Paleontology and Stratigraphy of Fossils
- Protist diversity and phylogeny
- Ocean Acidification Effects and Responses
- Hydrocarbon exploration and reservoir analysis
- Genomics and Phylogenetic Studies
- Cephalopods and Marine Biology
- Marine and environmental studies
- Geological formations and processes
- Geochemistry and Geologic Mapping
- Atmospheric and Environmental Gas Dynamics
- Coral and Marine Ecosystems Studies
- Geochemistry and Elemental Analysis
- Oceanographic and Atmospheric Processes
- Marine Toxins and Detection Methods
- Evolution and Paleontology Studies
- Geological Formations and Processes Exploration
- Geological and Geochemical Analysis
- Metabolomics and Mass Spectrometry Studies
- Marine Bivalve and Aquaculture Studies
Woods Hole Oceanographic Institution
2015-2025
Institut Français de la Mer
2023
Oceanography Society
2015
University of South Carolina
1999-2006
New York State Department of Health
1995-1997
University at Albany, State University of New York
1996
University of Oslo
1996
Wadsworth Center
1993-1996
Albany State University
1996
University of California, San Diego
1990-1993
Other| July 01, 1986 Characteristic assemblages and morphologies of benthic foraminifera from anoxic, organic-rich deposits; Jurassic through Holocene Joan M. Bernhard Univ. Calif., Dep. Geol., Davis, CA, United States Search for other works by this author on: GSW Google Scholar Author Article Information Publisher: Cushman Foundation Foraminiferal Research First Online: 03 Mar 2017 Online ISSN: 1943-264X Print 0096-1191 GeoRef, Copyright 2004, American Geological Institute. Journal (1986)...
This experimental study investigated the vertical migratory response of benthic forammifera in sediments that were initially oxygenated, to variations dissolved-oxygen concentrations ranging from well-oxygenated dysaerobic conditions.Two box cores, with a carpet polychaete tubes extending above sediment-seawater interface, recovered 71 m water depth Oslofjord, southern Norway.The seawater oxygen concentration one core was decreased every 4 wk, minimum value <0.2 ml 0; 1'.Aerated circulation...
Other| October 01, 1997 Benthic foraminiferal proxy to estimate dysoxic bottom-water oxygen concentrations; Santa Barbara Basin, U.S. Pacific continental margin Joan M. Bernhard; Bernhard New York State Department of Health, Wadsworth Center, Albany, NY, United States Search for other works by this author on: GSW Google Scholar Barun K. Sen Gupta; Gupta Pamela F. Borne Author and Article Information Publisher: Cushman Foundation Foraminiferal Research First Online: 03 Mar 2017 Online ISSN:...
Other| April 01, 1988 Postmortem vital staining in benthic foraminifera; duration and importance population distributional studies J. M. Bernhard Search for other works by this author on: GSW Google Scholar Journal of Foraminiferal Research (1988) 18 (2): 143–146. https://doi.org/10.2113/gsjfr.18.2.143 Article history first online: 03 Mar 2017 Cite View This Citation Add to Manager Share Icon MailTo Twitter LinkedIn Tools Get Permissions Site Bernhard; studies. 1988;; doi: Download citation...
The conventional method to distinguish live from dead benthic foraminifers uses Rose Bengal, a stain that reacts with both and cytoplasm. CellTracker Green CMFDA is fluorogenic probe causing cells fluoresce after proper incubation. To determine the more accurate viability method, we conducted direct comparison of Bengal staining labeling. Eight multicore tops were analyzed Florida Margin (SE United States; 248–751 m water depths), near Great Bahama Bank (259–766 m), off Carolinas 220 920 m)....
Author Posting. © The Oceanography Society, 2015. This article is posted here by permission of Society for personal use, not redistribution. definitive version was published in 28, no. 2 (2015): 48-61, doi:10.5670/oceanog.2015.31.
Mitochondria-bearing microeukaryotes produce energy through anaerobic pathways to succeed in the face of ocean deoxygenation.
A temporal record of oxygen and NO 3 − concentrations in the bottom water Santa Barbara Basin indicates that outside waters spill over into basin seasonally. It is proposed an annual bottom‐water cycle leads ultimately to varve production. As evidence support a benthic mechanism for formation, we present results surface sediment pore‐water analyses, from box‐core collections during three seasons 1988. The greater degree depletion occurs regularly late summer fall was coincident with smaller...
Other| October 01, 1997 Foraminiferal colonization of hydrocarbon-seep bacterial mats and underlying sediment, Gulf Mexico slope Barun K. Sen Gupta; Gupta Louisiana State University, Department Geology Geophysics, Baton Rouge, LA, United States Search for other works by this author on: GSW Google Scholar Emil Platon; Platon Joan M. Bernhard; Bernhard Paul Aharon Author Article Information Publisher: Cushman Foundation Research First Online: 03 Mar 2017 Online ISSN: 1943-264X Print 0096-1191...
Until recently, the process of denitrification (conversion nitrate or nitrite to gaseous products) was thought be performed exclusively by prokaryotes and fungi. The finding that foraminifera perform complete could impact our understanding removal in sediments as well eukaryotic respiration, especially if it is widespread. However, details this subcellular location these reactions remain uncertain. For example, prokaryotic endobionts, rather than foraminifer proper, denitrification, has been...
Abstract Fjord systems are typically affected by low‐oxygen conditions, which increasing in extent and severity, forced ongoing global changes. sedimentary records can provide high temporal resolution archives to aid our understanding of the underlying mechanisms impacts current deoxygenation. However, such only be interpreted with well‐calibrated proxies. Bottom‐water oxygen conditions determine redox regime availability redox‐sensitive trace elements as manganese, turn may recorded...
Piston, gravity, and multicores as well hydrographic data were collected along the Pacific margin of Baja California to reconstruct past variations in intensity oxygen‐minimum zone (OMZ). Gravity cores from within OMZ north 24°N did not contain laminated surface sediments even though bottom water oxygen (BWO) concentrations close 5 μmol/kg. However, many south millimeter‐ centimeter‐scale, brown black laminations Holocene older but deposited during Last Glacial Maximum. In addition dark...