ERDDAP > info > bcodmo_dataset_712027

Grid DAP Data	Sub- set	Table DAP Data	Make A Graph	W M S	Source Data Files	Acces- sible	Title	Sum- mary	FGDC, ISO, Metadata	Back- ground Info	RSS	E mail	Institution	Dataset ID
		data	graph		files	public	[Chemical data] - Chemical data associated with field collections from the Gulf of Maine, Nauset Marsh Estuary System, and Long Island Sound (Alexandrium isotopes project) (Collaborative Research: Identification of nitrogen sources for toxic Alexandrium blooms using a novel species-specific tracer, d15N-saxitoxin)		I   M	background			BCO-DMO	bcodmo_dataset_712027

The Dataset's Variables and Attributes

Row Type	Variable Name	Attribute Name	Data Type	Value
attribute	NC_GLOBAL	access_formats	String	.htmlTable,.csv,.json,.mat,.nc,.tsv
attribute	NC_GLOBAL	acquisition_description	String	Stable Isotope Methods for d15N-NO3-, d18O-NO3-, d15N-POM, and d15N-NH4+: All filters, glassware, and glass vials used for isotope analysis were pre- combusted for 4 hours at 450C and plastic bottles were acid washed in a 10% HCl bath overnight, to eliminate any crossover N. In preparation for stable isotope analysis, raw seawater was filtered onto a glass fiber filter (25-mm diameter, Whatman GF/D, Cat #: 1823010) to separate particulate organic matter (POM) and dissolved fractions (NO3- and NH4+). Filters were transferred into 20-ml glass vials (Fisher, catalog #05-719-117) and frozen at -20C until isotope analysis of POM (15NPOM). Filtrate, 200 ml, for isotope analysis of dissolved NH4+ (15NNH4+) was processed using a modified version of the NH4+ diffusion method of Holmes (1998), whereby polypropylene membrane filters (25 mm, lot #: 151579, Sterlitech) replaced Teflon filters (Hannon and Bohlke 2008). Isotope analysis of NH4+ and POM was performed on a Finnigan-MAT DeltaPlus Isotope Ratio Monitoring Mass Spectrometer coupled with a Carlo Erba NC 2500 Elemental Analyzer (Model 1108) (Organic Mass Spectrometry Facility, WHOI). Depending on the expected amount of N per sample, the instrument was configured for the typical range of detection, 0.5 to 5 moles N, or modified at the EA combustion furnace to reach a lower detection limit, 0.15 umoles N (Houghton et al. 2000, Holtvoeth et al. 2005, 2006, York et al. 2007). The precision of 15N measurements on this instrument was 0.17\u2030. Filtrate, 20 ml for N and O stable isotope analysis of dissolved nitrate (15NNO3-) was transferred into duplicate 30-ml HDPE bottles and analyzed by bacteria denitrification assay using ThermoFinnigan GasBench + PreCon trace gas concentration system interfaced to a ThermoScientific Delta V Plus isotope- ratio mass spectrometer (Bremen, Germany) (UC Davis Stable Isotope Facility). Methods for nutrient quantification: Dissolved nutrient samples were filtered through a glass fiber filter (25-mm diameter, Whatman GF/F, CAT No. 1825-025). The filtrate was collected in acid-washed 20-ml scintillation vials for nutrient analysis and then frozen at -20 deg C until analysis. A SEAL AA3 four-channel segmented flow analyzer (Nutrient Chemical Facility, Woods Hole Oceanographic Institution, WHOI) was used to quantify NH4+, NO3-/NO2-, Silicate, and PO43- in the GF/F-filtered medium using standard methods.
attribute	NC_GLOBAL	awards_0_award_nid	String	700442
attribute	NC_GLOBAL	awards_0_award_number	String	OCE-1505604
attribute	NC_GLOBAL	awards_0_data_url	String	http://www.nsf.gov/awardsearch/showAward.do?AwardNumber=1505604
attribute	NC_GLOBAL	awards_0_funder_name	String	NSF Division of Ocean Sciences
attribute	NC_GLOBAL	awards_0_funding_acronym	String	NSF OCE
attribute	NC_GLOBAL	awards_0_funding_source_nid	String	355
attribute	NC_GLOBAL	awards_0_program_manager	String	Henrietta N Edmonds
attribute	NC_GLOBAL	awards_0_program_manager_nid	String	51517
attribute	NC_GLOBAL	awards_1_award_nid	String	700452
attribute	NC_GLOBAL	awards_1_award_number	String	OCE-1232835
attribute	NC_GLOBAL	awards_1_data_url	String	http://www.nsf.gov/awardsearch/showAward.do?AwardNumber=1232835
attribute	NC_GLOBAL	awards_1_funder_name	String	NSF Division of Ocean Sciences
attribute	NC_GLOBAL	awards_1_funding_acronym	String	NSF OCE
attribute	NC_GLOBAL	awards_1_funding_source_nid	String	355
attribute	NC_GLOBAL	awards_1_program_manager	String	Henrietta N Edmonds
attribute	NC_GLOBAL	awards_1_program_manager_nid	String	51517
attribute	NC_GLOBAL	cdm_data_type	String	Other
attribute	NC_GLOBAL	comment	String	Chemical data J. Smith, D. Anderson, D. Erdner, and J. McClelland, PIs Version 3 August 2017
attribute	NC_GLOBAL	Conventions	String	COARDS, CF-1.6, ACDD-1.3
attribute	NC_GLOBAL	creator_email	String	info at bco-dmo.org
attribute	NC_GLOBAL	creator_name	String	BCO-DMO
attribute	NC_GLOBAL	creator_type	String	institution
attribute	NC_GLOBAL	creator_url	String	https://www.bco-dmo.org/
attribute	NC_GLOBAL	data_source	String	extract_data_as_tsv version 2.3 19 Dec 2019
attribute	NC_GLOBAL	date_created	String	2017-08-03T17:58:49Z
attribute	NC_GLOBAL	date_modified	String	2019-03-20T16:01:03Z
attribute	NC_GLOBAL	defaultDataQuery	String	&time<now
attribute	NC_GLOBAL	doi	String	10.1575/1912/bco-dmo.712027.1
attribute	NC_GLOBAL	geospatial_vertical_max	double	90.0
attribute	NC_GLOBAL	geospatial_vertical_min	double	0.5
attribute	NC_GLOBAL	geospatial_vertical_positive	String	down
attribute	NC_GLOBAL	geospatial_vertical_units	String	m
attribute	NC_GLOBAL	infoUrl	String	https://www.bco-dmo.org/dataset/712027
attribute	NC_GLOBAL	institution	String	BCO-DMO
attribute	NC_GLOBAL	instruments_0_acronym	String	IR Mass Spec
attribute	NC_GLOBAL	instruments_0_dataset_instrument_description	String	Used to perform isotope analysis of NH4+ and POM
attribute	NC_GLOBAL	instruments_0_dataset_instrument_nid	String	712039
attribute	NC_GLOBAL	instruments_0_description	String	The Isotope-ratio Mass Spectrometer is a particular type of mass spectrometer used to measure the relative abundance of isotopes in a given sample (e.g. VG Prism II Isotope Ratio Mass-Spectrometer).
attribute	NC_GLOBAL	instruments_0_instrument_external_identifier	String	https://vocab.nerc.ac.uk/collection/L05/current/LAB16/
attribute	NC_GLOBAL	instruments_0_instrument_name	String	Isotope-ratio Mass Spectrometer
attribute	NC_GLOBAL	instruments_0_instrument_nid	String	469
attribute	NC_GLOBAL	instruments_0_supplied_name	String	Finnigan-MAT DeltaPlus Isotope Ratio Monitoring Mass Spectrometer
attribute	NC_GLOBAL	instruments_1_acronym	String	IR Mass Spec
attribute	NC_GLOBAL	instruments_1_dataset_instrument_description	String	Used to analyze N and O stable isotopes
attribute	NC_GLOBAL	instruments_1_dataset_instrument_nid	String	712041
attribute	NC_GLOBAL	instruments_1_description	String	The Isotope-ratio Mass Spectrometer is a particular type of mass spectrometer used to measure the relative abundance of isotopes in a given sample (e.g. VG Prism II Isotope Ratio Mass-Spectrometer).
attribute	NC_GLOBAL	instruments_1_instrument_external_identifier	String	https://vocab.nerc.ac.uk/collection/L05/current/LAB16/
attribute	NC_GLOBAL	instruments_1_instrument_name	String	Isotope-ratio Mass Spectrometer
attribute	NC_GLOBAL	instruments_1_instrument_nid	String	469
attribute	NC_GLOBAL	instruments_1_supplied_name	String	ThermoScientific Delta V Plus isotope-ratio mass spectrometer
attribute	NC_GLOBAL	instruments_2_acronym	String	Gas Analyzer
attribute	NC_GLOBAL	instruments_2_dataset_instrument_description	String	Used to analyze N and O stable isotopes
attribute	NC_GLOBAL	instruments_2_dataset_instrument_nid	String	712042
attribute	NC_GLOBAL	instruments_2_description	String	Gas Analyzers - Instruments for determining the qualitative and quantitative composition of gas mixtures.
attribute	NC_GLOBAL	instruments_2_instrument_name	String	Gas Analyzer
attribute	NC_GLOBAL	instruments_2_instrument_nid	String	720
attribute	NC_GLOBAL	instruments_2_supplied_name	String	ThermoFinnigan GasBench + PreCon trace gas concentration system
attribute	NC_GLOBAL	instruments_3_dataset_instrument_description	String	Used to perform isotope analysis of NH4+ and POM
attribute	NC_GLOBAL	instruments_3_dataset_instrument_nid	String	712040
attribute	NC_GLOBAL	instruments_3_description	String	Instruments that quantify carbon, nitrogen and sometimes other elements by combusting the sample at very high temperature and assaying the resulting gaseous oxides. Usually used for samples including organic material.
attribute	NC_GLOBAL	instruments_3_instrument_external_identifier	String	https://vocab.nerc.ac.uk/collection/L05/current/LAB01/
attribute	NC_GLOBAL	instruments_3_instrument_name	String	Elemental Analyzer
attribute	NC_GLOBAL	instruments_3_instrument_nid	String	546339
attribute	NC_GLOBAL	instruments_3_supplied_name	String	Carlo Erba NC 2500 Elemental Analyzer (Model 1108)
attribute	NC_GLOBAL	instruments_4_acronym	String	CFA
attribute	NC_GLOBAL	instruments_4_dataset_instrument_description	String	Used to quantify NH4+, NO3-/NO2-, Silicate, and PO43-
attribute	NC_GLOBAL	instruments_4_dataset_instrument_nid	String	712043
attribute	NC_GLOBAL	instruments_4_description	String	A sample is injected into a flowing carrier solution passing rapidly through small-bore tubing.
attribute	NC_GLOBAL	instruments_4_instrument_name	String	Continuous Flow Analyzer
attribute	NC_GLOBAL	instruments_4_instrument_nid	String	661968
attribute	NC_GLOBAL	instruments_4_supplied_name	String	SEAL AA3 four-channel segmented flow analyzer
attribute	NC_GLOBAL	keywords	String	ammonia, ammonium, bco, bco-dmo, biological, chemical, chemistry, concentration, d15, d15N_NH4, d15N_NO3, d15N_POM, d18, d18O_NO3, data, dataset, date, depth, description, dmo, earth, Earth Science > Oceans > Ocean Chemistry > Ammonia, Earth Science > Oceans > Ocean Chemistry > Silicate, erddap, management, mass, mass_concentration_of_silicate_in_sea_water, model, mole, mole_concentration_of_ammonium_in_sea_water, nh4, nitrate, no3, ocean, oceanography, oceans, office, phosphate, po4, pom, preliminary, princeton, sample, Sample_ID, science, sea, seawater, silicate, time, water
attribute	NC_GLOBAL	keywords_vocabulary	String	GCMD Science Keywords
attribute	NC_GLOBAL	license	String	https://www.bco-dmo.org/dataset/712027/license
attribute	NC_GLOBAL	metadata_source	String	https://www.bco-dmo.org/api/dataset/712027
attribute	NC_GLOBAL	param_mapping	String	{'712027': {'Depth': 'master - depth'}}
attribute	NC_GLOBAL	parameter_source	String	https://www.bco-dmo.org/mapserver/dataset/712027/parameters
attribute	NC_GLOBAL	people_0_affiliation	String	Virginia Institute of Marine Science
attribute	NC_GLOBAL	people_0_affiliation_acronym	String	VIMS
attribute	NC_GLOBAL	people_0_person_name	String	Dr Juliette L. Smith
attribute	NC_GLOBAL	people_0_person_nid	String	700445
attribute	NC_GLOBAL	people_0_role	String	Principal Investigator
attribute	NC_GLOBAL	people_0_role_type	String	originator
attribute	NC_GLOBAL	people_1_affiliation	String	Woods Hole Oceanographic Institution
attribute	NC_GLOBAL	people_1_affiliation_acronym	String	WHOI
attribute	NC_GLOBAL	people_1_person_name	String	Dr Donald M. Anderson
attribute	NC_GLOBAL	people_1_person_nid	String	51236
attribute	NC_GLOBAL	people_1_role	String	Co-Principal Investigator
attribute	NC_GLOBAL	people_1_role_type	String	originator
attribute	NC_GLOBAL	people_2_affiliation	String	University of Texas - Marine Science Institute
attribute	NC_GLOBAL	people_2_affiliation_acronym	String	UTMSI
attribute	NC_GLOBAL	people_2_person_name	String	Dr Deana L. Erdner
attribute	NC_GLOBAL	people_2_person_nid	String	700454
attribute	NC_GLOBAL	people_2_role	String	Co-Principal Investigator
attribute	NC_GLOBAL	people_2_role_type	String	originator
attribute	NC_GLOBAL	people_3_affiliation	String	University of Texas - Marine Science Institute
attribute	NC_GLOBAL	people_3_affiliation_acronym	String	UTMSI
attribute	NC_GLOBAL	people_3_person_name	String	Dr James W. McClelland
attribute	NC_GLOBAL	people_3_person_nid	String	700456
attribute	NC_GLOBAL	people_3_role	String	Co-Principal Investigator
attribute	NC_GLOBAL	people_3_role_type	String	originator
attribute	NC_GLOBAL	people_4_affiliation	String	Virginia Institute of Marine Science
attribute	NC_GLOBAL	people_4_affiliation_acronym	String	VIMS
attribute	NC_GLOBAL	people_4_person_name	String	Dr Juliette L. Smith
attribute	NC_GLOBAL	people_4_person_nid	String	700445
attribute	NC_GLOBAL	people_4_role	String	Contact
attribute	NC_GLOBAL	people_4_role_type	String	related
attribute	NC_GLOBAL	people_5_affiliation	String	Woods Hole Oceanographic Institution
attribute	NC_GLOBAL	people_5_affiliation_acronym	String	WHOI BCO-DMO
attribute	NC_GLOBAL	people_5_person_name	String	Hannah Ake
attribute	NC_GLOBAL	people_5_person_nid	String	650173
attribute	NC_GLOBAL	people_5_role	String	BCO-DMO Data Manager
attribute	NC_GLOBAL	people_5_role_type	String	related
attribute	NC_GLOBAL	project	String	Alexandrium-isotopes
attribute	NC_GLOBAL	projects_0_acronym	String	Alexandrium-isotopes
attribute	NC_GLOBAL	projects_0_description	String	NSF award abstract: The US and other countries throughout the world are affected by harmful algal blooms (HABs) that negatively impact human health, marine ecosystems, fisheries resources, and local economies. Anthropogenic nutrient loadings have been linked to expanding HAB incidence, but the relationship is site- and organism-specific, and is still poorly understood. The main challenge in this regard is to determine the relative importance of natural versus anthropogenic nutrient sources in the development of an individual HAB species. Given the diverse nature of the planktonic assemblage in which HABs occur, and the lack of appropriate measurement techniques, this is exceedingly difficult to accomplish. In this project, research teams at the Woods Hole Oceanographic Institution and University of Texas at Austin will take a novel approach to this challenge: They use use the nitrogen isotopic signature (del15N) of a species-specific HAB toxin to identify the nitrogen source and chemical form that promotes cell growth and toxin production. The bloom-forming dinoflagellate Alexandrium fundyense and its class of bioactive compounds, saxitoxins (STXs), are an ideal model system as STXs are nitrogen-rich and are typically only produced by a single species in mixed plankton assemblages. The guiding overall hypothesis is that the isotopic signature of a HAB-specific toxin can be used to discriminate between anthropogenic and natural sources of N and provide more details than bulk material del15N on the source, chemical form, and processing of N that lead to blooms of a particular toxic species. This hypothesis is based on the principle that human and animal waste in groundwater and sewage become 15N-enriched and inorganic fertilizers 15N-depleted, relative to natural sources of N in catchment waters. While the use of the isotopic ratio del15N of bulk biomass to identify nitrogen sources to coastal waters is a widely accepted practice, this use of a toxin as a species-specific tracer or marker is new and will provide details on the explicit source, chemical form, and processing of nitrogen that results in blooms of a particular HAB species. Broader Impacts: This project addresses fundamental issues underlying the most widespread of all HAB poisoning syndromes, paralytic shellfish poisoning (PSP), a major form of shellfish poisoning that affects countries throughout the world. Project results can also assist in policy decisions about pollution control and other bloom mitigation strategies, and can be applied to a range of HAB species - those that produce saxitoxins, as well as those that produce other toxins that are nitrogen rich. Project results will be broadly disseminated through scientific papers, presentations at workshops, domestic and international conferences, and departmental seminars, and discussions with the media.
attribute	NC_GLOBAL	projects_0_end_date	String	2016-10
attribute	NC_GLOBAL	projects_0_geolocation	String	Gulf of Maine, Nauset Marsh Estuary System (Cape Cod Seashore), Northport Huntington Bay Complex (Long Island Sound)
attribute	NC_GLOBAL	projects_0_name	String	Collaborative Research: Identification of nitrogen sources for toxic Alexandrium blooms using a novel species-specific tracer, d15N-saxitoxin
attribute	NC_GLOBAL	projects_0_project_nid	String	700443
attribute	NC_GLOBAL	projects_0_project_website	String	http://www.vims.edu/research/departments/eaah/programs/aquatic_toxinology/research/isotope_project.php
attribute	NC_GLOBAL	projects_0_start_date	String	2014-08
attribute	NC_GLOBAL	publisher_name	String	Biological and Chemical Oceanographic Data Management Office (BCO-DMO)
attribute	NC_GLOBAL	publisher_type	String	institution
attribute	NC_GLOBAL	sourceUrl	String	(local files)
attribute	NC_GLOBAL	standard_name_vocabulary	String	CF Standard Name Table v55
attribute	NC_GLOBAL	summary	String	Chemical data associated with field collections from the Gulf of Maine, Nauset Marsh Estuary System, and Long Island Sound (Alexandrium isotopes project)
attribute	NC_GLOBAL	title	String	[Chemical data] - Chemical data associated with field collections from the Gulf of Maine, Nauset Marsh Estuary System, and Long Island Sound (Alexandrium isotopes project) (Collaborative Research: Identification of nitrogen sources for toxic Alexandrium blooms using a novel species-specific tracer, d15N-saxitoxin)
attribute	NC_GLOBAL	version	String	1
attribute	NC_GLOBAL	xml_source	String	osprey2erddap.update_xml() v1.3
variable	Date		String
attribute	Date	bcodmo_name	String	date
attribute	Date	description	String	Date sample was taken; YYYY/MM/DD
attribute	Date	long_name	String	Date
attribute	Date	nerc_identifier	String	https://vocab.nerc.ac.uk/collection/P01/current/ADATAA01/
attribute	Date	source_name	String	Date
attribute	Date	time_precision	String	1970-01-01
attribute	Date	units	String	unitless
variable	Sample_ID		String
attribute	Sample_ID	bcodmo_name	String	sample
attribute	Sample_ID	description	String	Sample ID; short name/abbreviation
attribute	Sample_ID	long_name	String	Sample ID
attribute	Sample_ID	nerc_identifier	String	https://vocab.nerc.ac.uk/collection/P02/current/ACYC/
attribute	Sample_ID	units	String	unitless
variable	Description		String
attribute	Description	bcodmo_name	String	brief_desc
attribute	Description	description	String	Full description of site and station where sample was taken
attribute	Description	long_name	String	Description
attribute	Description	units	String	unitless
variable	depth		double
attribute	depth	_CoordinateAxisType	String	Height
attribute	depth	_CoordinateZisPositive	String	down
attribute	depth	_FillValue	double	NaN
attribute	depth	actual_range	double	0.5, 90.0
attribute	depth	axis	String	Z
attribute	depth	bcodmo_name	String	depth
attribute	depth	colorBarMaximum	double	8000.0
attribute	depth	colorBarMinimum	double	-8000.0
attribute	depth	colorBarPalette	String	TopographyDepth
attribute	depth	description	String	Depth that sample was taken
attribute	depth	ioos_category	String	Location
attribute	depth	long_name	String	Depth
attribute	depth	nerc_identifier	String	https://vocab.nerc.ac.uk/collection/P09/current/DEPH/
attribute	depth	positive	String	down
attribute	depth	standard_name	String	depth
attribute	depth	units	String	m
variable	d15N_NO3		String
attribute	d15N_NO3	bcodmo_name	String	d15N
attribute	d15N_NO3	description	String	Stable isotope value; d15N - NO3
attribute	d15N_NO3	long_name	String	D15 N NO3
attribute	d15N_NO3	units	String	per mil (0/00)
variable	d18O_NO3		String
attribute	d18O_NO3	bcodmo_name	String	d18O_NO3
attribute	d18O_NO3	description	String	Stable isotope value; d18O - NO3
attribute	d18O_NO3	long_name	String	D18 O NO3
attribute	d18O_NO3	units	String	per mil (0/00)
variable	d15N_NH4		float
attribute	d15N_NH4	_FillValue	float	NaN
attribute	d15N_NH4	actual_range	float	1.4, 17.9
attribute	d15N_NH4	bcodmo_name	String	d15N
attribute	d15N_NH4	colorBarMaximum	double	5.0
attribute	d15N_NH4	colorBarMinimum	double	0.0
attribute	d15N_NH4	description	String	Stable isotope value; d15N - NH4
attribute	d15N_NH4	long_name	String	Mole Concentration Of Ammonium In Sea Water
attribute	d15N_NH4	units	String	per mil (0/00)
variable	d15N_POM		String
attribute	d15N_POM	bcodmo_name	String	d15N
attribute	d15N_POM	description	String	Stable isotope value; d15N - POM
attribute	d15N_POM	long_name	String	D15 N POM
attribute	d15N_POM	units	String	per mil (0/00)
variable	NO3		String
attribute	NO3	bcodmo_name	String	NO3
attribute	NO3	description	String	Dissolved nutrient concentration; NO3-
attribute	NO3	long_name	String	NO3
attribute	NO3	nerc_identifier	String	https://vocab.nerc.ac.uk/collection/P01/current/NTRAIGGS/
attribute	NO3	units	String	micromoles per liter
variable	NH4		float
attribute	NH4	_FillValue	float	NaN
attribute	NH4	actual_range	float	0.1, 18.9
attribute	NH4	bcodmo_name	String	Ammonium
attribute	NH4	colorBarMaximum	double	5.0
attribute	NH4	colorBarMinimum	double	0.0
attribute	NH4	description	String	Dissolved nutrient concentration; NH4
attribute	NH4	long_name	String	Mole Concentration Of Ammonium In Sea Water
attribute	NH4	nerc_identifier	String	https://vocab.nerc.ac.uk/collection/P01/current/AMONAAZX/
attribute	NH4	units	String	micromoles per liter
variable	PO4		String
attribute	PO4	bcodmo_name	String	PO4
attribute	PO4	description	String	Dissolved nutrient concentration; PO4
attribute	PO4	long_name	String	PO4
attribute	PO4	units	String	micromoles per liter
variable	Silicate		float
attribute	Silicate	_FillValue	float	NaN
attribute	Silicate	actual_range	float	0.1, 41.8
attribute	Silicate	bcodmo_name	String	SiO4
attribute	Silicate	description	String	Dissolved nutrient concentration; Silicate
attribute	Silicate	long_name	String	Mass Concentration Of Silicate In Sea Water
attribute	Silicate	nerc_identifier	String	https://vocab.nerc.ac.uk/collection/P01/current/SLCAAAZX/
attribute	Silicate	units	String	micromoles per liter

The information in the table above is also available in other file formats (.csv, .htmlTable, .itx, .json, .jsonlCSV1, .jsonlCSV, .jsonlKVP, .mat, .nc, .nccsv, .tsv, .xhtml) via a RESTful web service.