ERDDAP > info > bcodmo_dataset_766334

Grid DAP Data	Sub- set	Table DAP Data	Make A Graph	W M S	Source Data Files	Acces- sible	Title	Sum- mary	ISO, Metadata	Back- ground Info	RSS	E mail	Institution	Dataset ID
		data	graph		files	public	Nitrogen and carbon fixation rates from bulk water samples from RV/Atlantic cruise AT39-05, Feb-Mar 2018		I   M	background			BCO-DMO	bcodmo_dataset_766334

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,.esriCsv,.geoJson
attribute	NC_GLOBAL	acquisition_description	String	Shipboard incubation experiments were carried out at 15 stations in the tropical Atlantic with trace metal clean-collected bulk water to examine iron (Fe) and phosphorus (P) co-limitation of dinitrogen (N2) fixation (see TriCoLim Station coordinates metadata). Treatments were: Co-limited control (no additions, \u201cColimit\u201d), + 2nM Fe (\u201cFe\u201d), + 50 nM P (\u201cP\u201d) and Replete (+Fe+P, \u201cRep\u201d).\u00a0All incubations were carried out at ambient (\u201cLo\u201d) temperature and ambient temperature +3C (\u201cHi\u201d) for 2-4 days on deck before measuring 15N2 and 13CO2 fixation rates and particulate organic carbon (POC) and nitrogen (PON). See related datasets. [Nitrogen and carbon fixation rates - Trichodesmium](\\"https://www.bco- dmo.org/dataset/766354\\") | Nitrogen and carbon fixation rates from Trichodesmium colonies from RV/Atlantic cruise AT39-05, Feb-Mar 2018 ---|--- [POC and PON - bulk seawater](\\"https://www.bco-dmo.org/dataset/766374\\") | POC and PON from bulk seawater samples from RV/Atlantic cruise AT39-05, Feb- Mar 2018 [POC and PON - Trichodesmium](\\"https://www.bco-dmo.org/dataset/766394\\") | POC and PON from Trichodesmium colonies from RV/Atlantic cruise AT39-05, Feb- Mar 2018
attribute	NC_GLOBAL	awards_0_award_nid	String	724450
attribute	NC_GLOBAL	awards_0_award_number	String	OCE-1657757
attribute	NC_GLOBAL	awards_0_data_url	String	http://www.nsf.gov/awardsearch/showAward.do?AwardNumber=1657757
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	David L. Garrison
attribute	NC_GLOBAL	awards_0_program_manager_nid	String	50534
attribute	NC_GLOBAL	cdm_data_type	String	Other
attribute	NC_GLOBAL	comment	String	Nitrogen and carbon fixation rates from bulk water samples from RV/Atlantic cruise AT39-05, Feb-Mar 2018 PI's: D. Hutchins, E. Webb (USC) version date: 2019-10-02
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	dataset_current_state	String	Final and no updates
attribute	NC_GLOBAL	date_created	String	2019-05-06T13:40:55Z
attribute	NC_GLOBAL	date_modified	String	2020-05-04T13:03:29Z
attribute	NC_GLOBAL	defaultDataQuery	String	&time<now
attribute	NC_GLOBAL	doi	String	10.26008/1912/bco-dmo.766334.1
attribute	NC_GLOBAL	Easternmost_Easting	double	-21.998
attribute	NC_GLOBAL	geospatial_lat_max	double	13.6776
attribute	NC_GLOBAL	geospatial_lat_min	double	-7.9989
attribute	NC_GLOBAL	geospatial_lat_units	String	degrees_north
attribute	NC_GLOBAL	geospatial_lon_max	double	-21.998
attribute	NC_GLOBAL	geospatial_lon_min	double	-55.8123
attribute	NC_GLOBAL	geospatial_lon_units	String	degrees_east
attribute	NC_GLOBAL	infoUrl	String	https://www.bco-dmo.org/dataset/766334
attribute	NC_GLOBAL	institution	String	BCO-DMO
attribute	NC_GLOBAL	instruments_0_acronym	String	TM Bottle
attribute	NC_GLOBAL	instruments_0_dataset_instrument_description	String	Used to collect clean seawater.
attribute	NC_GLOBAL	instruments_0_dataset_instrument_nid	String	766344
attribute	NC_GLOBAL	instruments_0_description	String	Trace metal (TM) clean rosette bottle used for collecting trace metal clean seawater samples.
attribute	NC_GLOBAL	instruments_0_instrument_external_identifier	String	https://vocab.nerc.ac.uk/collection/L05/current/30/
attribute	NC_GLOBAL	instruments_0_instrument_name	String	Trace Metal Bottle
attribute	NC_GLOBAL	instruments_0_instrument_nid	String	493
attribute	NC_GLOBAL	keywords	String	bco, bco-dmo, biological, C_fix, chemical, data, dataset, dmo, erddap, experiment, Experiment_ID, fix, latitude, longitude, management, N2_fix, oceanography, office, preliminary, sample, Sample_D, station, treatment
attribute	NC_GLOBAL	license	String	https://www.bco-dmo.org/dataset/766334/license
attribute	NC_GLOBAL	metadata_source	String	https://www.bco-dmo.org/api/dataset/766334
attribute	NC_GLOBAL	Northernmost_Northing	double	13.6776
attribute	NC_GLOBAL	param_mapping	String	{'766334': {'Latitude': 'flag - latitude', 'Longitude': 'flag - longitude'}}
attribute	NC_GLOBAL	parameter_source	String	https://www.bco-dmo.org/mapserver/dataset/766334/parameters
attribute	NC_GLOBAL	people_0_affiliation	String	University of Southern California
attribute	NC_GLOBAL	people_0_affiliation_acronym	String	USC
attribute	NC_GLOBAL	people_0_person_name	String	David A. Hutchins
attribute	NC_GLOBAL	people_0_person_nid	String	51048
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	University of Southern California
attribute	NC_GLOBAL	people_1_affiliation_acronym	String	USC
attribute	NC_GLOBAL	people_1_person_name	String	Eric A Webb
attribute	NC_GLOBAL	people_1_person_nid	String	51340
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	Woods Hole Oceanographic Institution
attribute	NC_GLOBAL	people_2_affiliation_acronym	String	WHOI BCO-DMO
attribute	NC_GLOBAL	people_2_person_name	String	Nancy Copley
attribute	NC_GLOBAL	people_2_person_nid	String	50396
attribute	NC_GLOBAL	people_2_role	String	BCO-DMO Data Manager
attribute	NC_GLOBAL	people_2_role_type	String	related
attribute	NC_GLOBAL	project	String	TriCoLim
attribute	NC_GLOBAL	projects_0_acronym	String	TriCoLim
attribute	NC_GLOBAL	projects_0_description	String	NSF abstract: Marine cyanobacteria are able to use or "fix" atmospheric nitrogen gas, and so supply much of the essential nutrient nitrogen that supports open ocean food chains. Oceanographers have usually thought that the growth of these nitrogen-fixing cyanobacteria is limited at any particular time and place by the supply of either iron, or of phosphorus. Preliminary experiments have shown, though, that these nitrogen fixers instead grow best when both iron and phosphorus are scarce at the same time. In this project, the researchers will use cellular indicators that are specific for iron and phosphorus limitation to determine how important this type of "balanced limitation" of nitrogen-fixing cyanobacteria is in controlling the productivity of ocean food chains in the tropical Atlantic Ocean. Two graduate students will be trained at the University of Southern California (USC) and Woods Hole Oceanographic Institution, as well as a postdoctoral researcher at USC. Educational outreach efforts will take place at a Los Angeles inner city high school with a student body that is over 98% Hispanic and African-American, and with underrepresented undergraduates in the USC Global Environmental Microbiology course. In addition, two Research Experiences for Undergraduates students will be supervised for summer research projects to help them learn about science career options. The researchers will investigate the biological and biogeochemical consequences of this unique balanced iron/phosphorus-limited phenotype, using both laboratory and fieldwork approaches. During the first year of this project, the nitrogen-fixing cyanobacteria will be cultured under iron and/or phosphorus limitation, followed by application of proteomics and transcriptomics to identify genes that are potential diagnostic biomarkers for iron/phosphorus balanced limitation. Preliminary work has already identified one promising candidate biomarker in one cyanobacterium, an EzrA protein domain that appears to be associated with the cell size decreases seen specifically under balanced limitation, and the researchers have identified numerous other potential candidates for similar biomarkers. During the second year, these new co-limitation biomarkers and others previously validated for iron limitation (IsiB) and phosphorus limitation (SphX) will be used to investigate balanced limitation during a research cruise transecting from relatively high-iron, low-phosphorus North Atlantic waters, to the relatively high-phosphorus, low-iron South Atlantic. This fieldwork component will survey nitrogen fixing cyanobacteria populations across this natural iron/phosphorus gradient for genetic, proteomic, and physiological indicators of balanced limitation, as well as testing their responses to iron and phosphorus manipulations in shipboard incubation experiments. The third year will be devoted to sample analysis, and publications exploring the responses of oceanic nitrogen fixers to simultaneous limitation by both iron and phosphorus.
attribute	NC_GLOBAL	projects_0_end_date	String	2020-02
attribute	NC_GLOBAL	projects_0_geolocation	String	Tropical Atlantic
attribute	NC_GLOBAL	projects_0_name	String	Collaborative Research: Iron and phosphorus balanced limitation of nitrogen fixation in the oligotrophic ocean
attribute	NC_GLOBAL	projects_0_project_nid	String	724451
attribute	NC_GLOBAL	projects_0_start_date	String	2017-03
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	Southernmost_Northing	double	-7.9989
attribute	NC_GLOBAL	standard_name_vocabulary	String	CF Standard Name Table v55
attribute	NC_GLOBAL	summary	String	Nitrogen and carbon fixation rates from bulk water samples from RV/Atlantic cruise AT39-05, Feb-Mar 2018.
attribute	NC_GLOBAL	title	String	Nitrogen and carbon fixation rates from bulk water samples from RV/Atlantic cruise AT39-05, Feb-Mar 2018
attribute	NC_GLOBAL	version	String	1
attribute	NC_GLOBAL	Westernmost_Easting	double	-55.8123
attribute	NC_GLOBAL	xml_source	String	osprey2erddap.update_xml() v1.5
variable	Station		byte
attribute	Station	_FillValue	byte	127
attribute	Station	actual_range	byte	3, 18
attribute	Station	bcodmo_name	String	station
attribute	Station	description	String	station identifier
attribute	Station	long_name	String	Station
attribute	Station	units	String	unitless
variable	Experiment_ID		String
attribute	Experiment_ID	bcodmo_name	String	exp_id
attribute	Experiment_ID	description	String	experiment_id identifier
attribute	Experiment_ID	long_name	String	Experiment ID
attribute	Experiment_ID	units	String	unitless
variable	latitude		double
attribute	latitude	_CoordinateAxisType	String	Lat
attribute	latitude	_FillValue	double	NaN
attribute	latitude	actual_range	double	-7.9989, 13.6776
attribute	latitude	axis	String	Y
attribute	latitude	bcodmo_name	String	latitude
attribute	latitude	colorBarMaximum	double	90.0
attribute	latitude	colorBarMinimum	double	-90.0
attribute	latitude	description	String	latitude; north is positive
attribute	latitude	ioos_category	String	Location
attribute	latitude	long_name	String	Latitude
attribute	latitude	nerc_identifier	String	https://vocab.nerc.ac.uk/collection/P09/current/LATX/
attribute	latitude	standard_name	String	latitude
attribute	latitude	units	String	degrees_north
variable	longitude		double
attribute	longitude	_CoordinateAxisType	String	Lon
attribute	longitude	_FillValue	double	NaN
attribute	longitude	actual_range	double	-55.8123, -21.998
attribute	longitude	axis	String	X
attribute	longitude	bcodmo_name	String	longitude
attribute	longitude	colorBarMaximum	double	180.0
attribute	longitude	colorBarMinimum	double	-180.0
attribute	longitude	description	String	longitude; east is positive
attribute	longitude	ioos_category	String	Location
attribute	longitude	long_name	String	Longitude
attribute	longitude	nerc_identifier	String	https://vocab.nerc.ac.uk/collection/P09/current/LONX/
attribute	longitude	standard_name	String	longitude
attribute	longitude	units	String	degrees_east
variable	Sample_D		String
attribute	Sample_D	bcodmo_name	String	sample
attribute	Sample_D	description	String	sample identifier
attribute	Sample_D	long_name	String	Sample D
attribute	Sample_D	nerc_identifier	String	https://vocab.nerc.ac.uk/collection/P02/current/ACYC/
attribute	Sample_D	units	String	unitless
variable	Treatment		String
attribute	Treatment	bcodmo_name	String	treatment
attribute	Treatment	description	String	treatment: Lo temp = ambient temperature Hi temp = ambient temperature plus 3 degrees C. Colimit = Co-limited control (no additions) Fe = 2nM Fe P = 50 nM P Rep =  Replete (+Fe+P)
attribute	Treatment	long_name	String	Treatment
attribute	Treatment	units	String	unitless
variable	N2_fix		float
attribute	N2_fix	_FillValue	float	NaN
attribute	N2_fix	actual_range	float	1.15E-6, 0.00116
attribute	N2_fix	bcodmo_name	String	N2_fix
attribute	N2_fix	description	String	nitrogen fixation rate measured as 15N2
attribute	N2_fix	long_name	String	N2 Fix
attribute	N2_fix	units	String	micromol/liter/hour (umol/l/h)
variable	C_fix		float
attribute	C_fix	_FillValue	float	NaN
attribute	C_fix	actual_range	float	1.23E-4, 0.0804
attribute	C_fix	bcodmo_name	String	unknown
attribute	C_fix	description	String	carbon fixation rate measured as 13CO2
attribute	C_fix	long_name	String	C Fix
attribute	C_fix	units	String	micromol/liter/hour (umol/l/h)

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.