Dataset: ISOMeHg Rates

Name: MeHg photoreduction rates and stable isotope enrichment from mercury reduction experiments conducted on marine phytoplankton from 2012-2013.
Published: 2020-10-14
Keywords: oceans

Cite This Dataset

DOI:10.26008/1912/bco-dmo.826633.1

Temporal Extent: 2012-12-12 - 2013-08-27

Project:

Collaborative Research: Transformations and mercury isotopic fractionation of methylmercury by marine phytoplankton (Phytoplankton MeHg)

Principal Investigator:

John Reinfelder (Rutgers University)

Co-Principal Investigator:

Nicholas S. Fisher (Stony Brook University - SoMAS, SUNY-SB SoMAS)

Robert P. Mason (University of Connecticut, UConn)

Scientist:

Joel D. Blum (University of Michigan)

Kritee Kritee (Environmental Defense Fund, EDF)

BCO-DMO Data Manager:

Shannon Rauch (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Version:

Version Date:

2020-10-14

Restricted:

Validated:

Yes

Current State:

Final no updates expected

MeHg photoreduction rates and stable isotope enrichment from mercury reduction experiments conducted on marine phytoplankton from 2012-2013.

Abstract:

MeHg photoreduction rates and stable isotope enrichment from mercury reduction experiments conducted on marine phytoplankton from 2012-2013.

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Archival Copy

Version Date	Archive	Persistent Identifier	Date Assigned
2020-10-14	Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA)	10.26008/1912/bco-dmo.826633.1	2020-10-20

Methods & Sampling

For detailed methods, see Kritee, et al. (2017).

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 Isochrysis galbana, a eukaryotic marine microalga of the globally important Prymnesiophyceae class; (2) actively growing monospecific cultures of I. galbana; and (3) cysteine or ocean water washed (nongrowing) I. galbana cells.

These data were published in Supplementary Table 2 of Kritee, et al. (2017).

Data Processing Description

BCO-DMO Processing:
- changed date format to YYYY-MM-DD

Data Files

File
ISOMeHg_rates.csv (Comma Separated Values (.csv), 989 bytes) MD5:10513f9f1dd972f067ccb40da7617c3c Primary data file for dataset ID 826633

More Information about this dataset

Funding Sources

Funding Source	Award Number
NSF Division of Ocean Sciences	OCE-1634154

Deployments

None available yet

Instruments

None available yet

Parameters

Date and time formats are described in python strftime() syntax.

Supplied Name	Supplied description	Supplied Units	Standard Name
Treatment	Experimental conditions	unitless	treatment
Date	Date of experiment; MM/DD/YYYY	unitless	date
Reactor_type	Experimental vessel	unitless	instrument
Init_cell_density	Cell density at start of experiment	cells per milliliter (cells/mL)	cell_concentration
Init_MeHg_conc_mass	MeHg concentration at start of experiment	nanograms per milliliter (ng/mL)	no_bcodmo_term
Init_MeHg_conc_molar	MeHg concentration at start of experiment	nanomolar (nM)	no_bcodmo_term
Init_intracell_MeHg_conc	Intracellular MeHg concentration at start of experiment	nanomoles Hg per microgram chlorophyll a (nmol/ug chla)	no_bcodmo_term
Duration	Length of experiment	days	time_elapsed
Rate_const	First order rate constant of reaction	1/h	no_bcodmo_term
Rate_const24	First order rate constant of reaction extrapolated to 24 h of daylight	1/d	no_bcodmo_term
Hg_reduced	Total Hg reduced at end of experiment	percent (%)	no_bcodmo_term
epsilon_202	mass-dependent 202Hg enrichment factor	per mil (‰)	no_bcodmo_term
epsilon_199	mass-independent 199Hg enrichment factor	per mil (‰)	no_bcodmo_term
D199_D201_ratio	D199Hg/D201 ratio	unitless	no_bcodmo_term
D199_d202_ratio	D199Hg/d202 ratio	unitless	no_bcodmo_term

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Dataset: ISOMeHg Rates