http://lod.bco-dmo.org/id/dataset/826724
eng; USA
utf8
dataset
Highest level of data collection, from a common set of sensors or instrumentation, usually within the same research project
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
pointOfContact
2020-10-14
ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data
ISO 19115-2:2009(E)
MeHg concentrations and stable isotope ratios for individual samples from mercury reduction experiments conducted on marine phytoplankton from 2012-2013
2020-10-14
publication
2020-10-14
revision
Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA)
2020-10-20
publication
https://doi.org/10.26008/1912/bco-dmo.826724.1
John Reinfelder
Rutgers University
principalInvestigator
Nicholas S. Fisher
Stony Brook University - SoMAS
principalInvestigator
Robert P. Mason
University of Connecticut
principalInvestigator
Joel D. Blum
University of Michigan
principalInvestigator
Kritee Kritee
Environmental Defense Fund
principalInvestigator
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
publisher
Cite this dataset as: Reinfelder, J., Kritee, K., Blum, J. D. (2020) MeHg concentrations and stable isotope ratios for individual samples from mercury reduction experiments conducted on marine phytoplankton from 2012-2013. Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 1) Version Date 2020-10-14 [if applicable, indicate subset used]. doi:10.26008/1912/bco-dmo.826724.1 [access date]
MeHg concentrations and stable isotope ratios for individual samples Dataset Description: Methods and Sampling: <p>For detailed methods, see Kritee, et al. (2017).</p>
<p>Rates and Hg stable isotope signatures of photomicrobial transformations of Hg(II) and MeHg in marine phytoplankton exposed to visible light and varying levels of UV radiation were examined in experiments with (1) sterile-filtered spent growth media containing extracellular exudates from cultures of <em>Isochrysis galbana</em>, a eukaryotic marine microalga of the globally important Prymnesiophyceae class; (2) actively growing monospecific cultures of <em>I. galbana</em>; and (3) cysteine or ocean water washed (nongrowing) <em>I. galbana</em> cells.</p>
<p>These data were published in Supplementary Table 4 of Kritee, et al. (2017).</p>
Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-1634154 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=1634154
completed
John Reinfelder
Rutgers University
848-932-5737
Department of Environmental Sciences
New Brunswick
NJ
08901
USA
reinfelder@envsci.rutgers.edu
pointOfContact
Nicholas S. Fisher
Stony Brook University - SoMAS
631-632-8649
School of Marine and Atmospheric Sciences
Stony Brook
NY
11794-5000
USA
Nicholas.Fisher@stonybrook.edu
pointOfContact
Robert P. Mason
University of Connecticut
860-405-9129
Department of Marine Sciences
Groton
CT
06340
USA
Robert.mason@uconn.edu
pointOfContact
Joel D. Blum
University of Michigan
734-615-3242
1100 North University Ave
Ann Arbor
MI
48109
USA
jdblum@umich.edu
pointOfContact
Kritee Kritee
Environmental Defense Fund
303-440-4901
2060 Broadway St.
Boulder
CO
80302
USA
kritee@edf.org
pointOfContact
asNeeded
Dataset Version: 1
Unknown
Treatment
Time
Hg_conc
Frac_remain
delta_202
delta_204
delta_201
delta_200
delta_199
D_199
D_201
D_204
D_200
theme
None, User defined
treatment
time_point
Mercury cation
No BCO-DMO term
featureType
BCO-DMO Standard Parameters
otherRestrictions
otherRestrictions
Access Constraints: none. Use Constraints: Please follow guidelines at: http://www.bco-dmo.org/terms-use Distribution liability: Under no circumstances shall BCO-DMO be liable for any direct, incidental, special, consequential, indirect, or punitive damages that result from the use of, or the inability to use, the materials in this data submission. If you are dissatisfied with any materials in this data submission your sole and exclusive remedy is to discontinue use.
Collaborative Research: Transformations and mercury isotopic fractionation of methylmercury by marine phytoplankton
https://osprey.bco-dmo.org/project/810499
Collaborative Research: Transformations and mercury isotopic fractionation of methylmercury by marine phytoplankton
<p><em>NSF Award Abstract:</em><br />
The accumulation of mercury (Hg) in seafood is a public health concern. The presence of Hg in seafood depends to a large degree on the air-sea exchange of Hg, with atmospheric deposition leading to accumulation of Hg in the ocean. The pathways to seafood start with the uptake of Hg by phytoplankton from seawater where is has always been assumed to accumulate to be eaten by grazers and passed on to larger organisms. This project challenges this assumption with preliminary data that suggests certain phytoplankton species can transform Hg to volatile forms (mercury vapor & dimethylmercury) that are lost to the atmosphere, a processes that removes Hg from the ocean rather than simply concentrating it into the ecosystem and seafood. This process, which has not been studied before, could dramatically alter our view of the Hg cycle in the ocean. The researchers funded by this project will look for the specific phytoplankton species that are capable of volatilizing Hg and quantify the rates at which they do so. They will also examine the suspected role of associated sulfur and selenium compounds in the process, as well as quantifying the changes in the Hg isotopic values for potential use as chemical tracers of the source of Hg in the ecosystem and food supply. These results should allow oceanographers to better quantify and refine our knowledge of Hg cycling in the ocean. The project will support participation of graduate students, a postdoctoral scientist, and incorporation of new information directly into courses taught by the researchers. Funding will also support continuing activities by the participants in activities that disseminate information on mercury and its effect on public and environmental health.</p>
<p>Biogeochemical cycling of mercury (Hg) in the ocean may be more complex than previously assumed. New evidence has challenged the idea that methylmercury (MeHg) merely accumulates in phytoplankton and undergoes little to no transformation before being passed into the food web. This project aims to more fully elucidate the mechanisms behind the intracellular transformation of MeHg to volatile Hg and dimethylmercury (Me2Hg) that can be lost to the atmosphere, as well as to evaluate the range of algal taxa that can perform this transformation using directed culture work. Additionally, the PIs will investigate evidence that thiols, organic selenium (Se) compounds, and sulfides are required to facilitate these reactions within the phytoplankton, and specific pathways will be investigated and quantified through this research. Stable Hg isotopic data has been used to track Hg sources and pathways in marine systems and its fractionation during these MeHg transformations will also be quantified for future field study of marine Hg. The investigators hypothesize that coccolithophorids and other haptophytes capable of these intracellular reactions may account for a significant portion of the production of volatile Hg in the ocean. If this turns out to be the case, understanding and quantifying these volatilization processes may significantly alter our current understanding of the overall biogeochemical cycling of Hg in the ocean.</p>
Phytoplankton MeHg
largerWorkCitation
project
eng; USA
oceans
2012-12-12
2013-08-27
Antarctic Peninsula
0
BCO-DMO catalogue of parameters from MeHg concentrations and stable isotope ratios for individual samples from mercury reduction experiments conducted on marine phytoplankton from 2012-2013
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
pointOfContact
http://lod.bco-dmo.org/id/dataset-parameter/826733.rdf
Name: Treatment
Units: unitless
Description: <p>Experimental conditions</p>
http://lod.bco-dmo.org/id/dataset-parameter/826734.rdf
Name: Time
Units: hours
Description: <p>Experimental sampling time</p>
http://lod.bco-dmo.org/id/dataset-parameter/826735.rdf
Name: Hg_conc
Units: micrograms per liter (ppb)
Description: <p>Hg(II) concentration at sample time</p>
http://lod.bco-dmo.org/id/dataset-parameter/826736.rdf
Name: Frac_remain
Units: percent (%)
Description: <p>Fraction of Hg(II) remaining in solution</p>
http://lod.bco-dmo.org/id/dataset-parameter/826737.rdf
Name: delta_202
Units: per mil (‰)
Description: <p>d202Hg value</p>
http://lod.bco-dmo.org/id/dataset-parameter/826738.rdf
Name: delta_204
Units: per mil (‰)
Description: <p>d204Hg value</p>
http://lod.bco-dmo.org/id/dataset-parameter/826739.rdf
Name: delta_201
Units: per mil (‰)
Description: <p>d201Hg value</p>
http://lod.bco-dmo.org/id/dataset-parameter/826740.rdf
Name: delta_200
Units: per mil (‰)
Description: <p>d200Hg value</p>
http://lod.bco-dmo.org/id/dataset-parameter/826741.rdf
Name: delta_199
Units: per mil (‰)
Description: <p>d199Hg value</p>
http://lod.bco-dmo.org/id/dataset-parameter/826742.rdf
Name: D_199
Units: per mil (‰)
Description: <p>D199Hg value</p>
http://lod.bco-dmo.org/id/dataset-parameter/826743.rdf
Name: D_201
Units: per mil (‰)
Description: <p>D201Hg value</p>
http://lod.bco-dmo.org/id/dataset-parameter/826744.rdf
Name: D_204
Units: per mil (‰)
Description: <p>D204Hg value</p>
http://lod.bco-dmo.org/id/dataset-parameter/826745.rdf
Name: D_200
Units: per mil (‰)
Description: <p>D200Hg value</p>
GB/NERC/BODC > British Oceanographic Data Centre, Natural Environment Research Council, United Kingdom
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
pointOfContact
3595
https://darchive.mblwhoilibrary.org/bitstream/1912/26333/1/dataset-826724_isomehg-samples__v1.tsv
download
https://doi.org/10.26008/1912/bco-dmo.826724.1
download
onLine
dataset
<p>For detailed methods, see Kritee, et al. (2017).</p>
<p>Rates and Hg stable isotope signatures of photomicrobial transformations of Hg(II) and MeHg in marine phytoplankton exposed to visible light and varying levels of UV radiation were examined in experiments with (1) sterile-filtered spent growth media containing extracellular exudates from cultures of <em>Isochrysis galbana</em>, a eukaryotic marine microalga of the globally important Prymnesiophyceae class; (2) actively growing monospecific cultures of <em>I. galbana</em>; and (3) cysteine or ocean water washed (nongrowing) <em>I. galbana</em> cells.</p>
<p>These data were published in Supplementary Table 4 of Kritee, et al. (2017).</p>
Specified by the Principal Investigator(s)
<p>BCO-DMO Processing:<br />
- renamed fields;<br />
- removed commas from treatment column.</p>
Specified by the Principal Investigator(s)
asNeeded
7.x-1.1
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
pointOfContact