ERDDAP > info > bcodmo_dataset_723957

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
	set	data	graph		files	public	[Denitrification and nitrogen fixation] - Potential denitrification and N2 fixation from slurry assays from Little Lagoon, Alabama collected from 2012-2013 (Groundwater Discharge, Benthic Coupling and Microalgal Community Structure in a Shallow Coastal Lagoon)		I   M	background			BCO-DMO	bcodmo_dataset_723957

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	Little Lagoon is a shallow coastal lagoon that is tidally connected to the Gulf of Mexico but has no riverine inputs. The water in the lagoon is replenished solely from precipitation and groundwater inputs primarily on the East end (Su et al. 2012). Because of the rapid development in Baldwin County, a large amount of NO3- enters the Little Lagoon system through SGD (Murgulet & Tick 2008). In this region, there can be rapid changes in the depth to groundwater (Fig. 4.1 inset) and episodic SGD inputs to the lagoon (Su et al.2013). Within the lagoon, three sites were selected (East, Mouth, and West) to represent the gradient that exists across the lagoon from the input of groundwater. Sites were sampled on a near-monthly basis from February 2012 to February 2013. Potential denitrification and N2 fixation from slurry assays The top 50 mm of sediment at each site were collected in duplicate with a large core (95 mm ID) and homogenized. Potential denitrification rates were measured following the acetylene inhibition technique (S\u00f8rensen 1978) but may underestimate denitrification supported by coupled nitrification- denitrification, as this method inhibits nitrification. To triplicate serum vials, approximately 20 g of sediments and filtered (0.7 micron) site water were added at various treatments (control and N addition (100 \u03bcM and 500 \u03bcM KNO3 -). Samples were sealed with a butyl rubber stopper, capped and flushed with N2 gas for 10 minutes. After the addition of C2H2 (10% v/v) and a 1-hour incubation, headspace gas samples were injected into evacuated 12 ml Exetainer vials and N2O production was quantified with a Shimadzu GC-2014 with an electron capture detector (GC-ECD) within 24 hours. Potential N2 fixation rates were measured as ethylene (C2H4) production from acetylene (C2H2) reduction (Welsh et al. 1996) in triplicate from slurry assays containing 20 g of homogenized sediment and filtered (0.7 micron) site water. Rates of N2 fixation by sulfate reducing bacteria (SRB) were determined after the addition of sodium molybdate as a specific inhibitor of the sulfate reduction process (Hardy et al. 1973, Capone 1993). After C2H4 analysis on a Shimadzu gas chromatograph (GC-2014) with flame ionization detection (GC-FID), production rates of C2H4 were converted to potential N2 fixation rates using a C2H2:N2 reduction ratio of 3:1 (Capone 1993). Additional methodology can be found in: Bernard, Rebecca & Mortazavi, Behzad & A. Kleinhuizen, Alice. (2015). Dissimilatory nitrate reduction to ammonium (DNRA) seasonally dominates NO3\u2212 reduction pathways in an anthropogenically impacted sub-tropical coastal lagoon. Biogeochemistry. 125. 47-64.\u00a0[10.1007/s10533-015-0111-6](\\"https://link.springer.com/article/10.1007%2Fs10533-015-0111-6\\").\u00a0
attribute	NC_GLOBAL	awards_0_award_nid	String	497637
attribute	NC_GLOBAL	awards_0_award_number	String	OCE-0962008
attribute	NC_GLOBAL	awards_0_data_url	String	http://nsf.gov/awardsearch/showAward?AWD_ID=0962008
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	DNF and N2 Data B. Mortazavi and W. Burnett, PIs Version 16 January 2018
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	2018-01-17T20:11:20Z
attribute	NC_GLOBAL	date_modified	String	2019-03-15T18:09:49Z
attribute	NC_GLOBAL	defaultDataQuery	String	&time<now
attribute	NC_GLOBAL	doi	String	10.1575/1912/bco-dmo.723957.1
attribute	NC_GLOBAL	infoUrl	String	https://www.bco-dmo.org/dataset/723957
attribute	NC_GLOBAL	institution	String	BCO-DMO
attribute	NC_GLOBAL	keywords	String	bco, bco-dmo, biological, chemical, data, dataset, date, description, dmo, east, East_SE, erddap, management, mouth, Mouth_SE, oceanography, office, preliminary, value, Value_Description, west, West_SE, year
attribute	NC_GLOBAL	license	String	https://www.bco-dmo.org/dataset/723957/license
attribute	NC_GLOBAL	metadata_source	String	https://www.bco-dmo.org/api/dataset/723957
attribute	NC_GLOBAL	param_mapping	String	{'723957': {}}
attribute	NC_GLOBAL	parameter_source	String	https://www.bco-dmo.org/mapserver/dataset/723957/parameters
attribute	NC_GLOBAL	people_0_affiliation	String	National Science Foundation
attribute	NC_GLOBAL	people_0_affiliation_acronym	String	NSF-DEB
attribute	NC_GLOBAL	people_0_person_name	String	Dr Behzad Mortazavi
attribute	NC_GLOBAL	people_0_person_nid	String	491316
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	Florida State University
attribute	NC_GLOBAL	people_1_affiliation_acronym	String	FSU - EOAS
attribute	NC_GLOBAL	people_1_person_name	String	Dr William C. Burnett
attribute	NC_GLOBAL	people_1_person_nid	String	491315
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	National Science Foundation
attribute	NC_GLOBAL	people_2_affiliation_acronym	String	NSF-DEB
attribute	NC_GLOBAL	people_2_person_name	String	Dr Behzad Mortazavi
attribute	NC_GLOBAL	people_2_person_nid	String	491316
attribute	NC_GLOBAL	people_2_role	String	Contact
attribute	NC_GLOBAL	people_2_role_type	String	related
attribute	NC_GLOBAL	people_3_affiliation	String	Woods Hole Oceanographic Institution
attribute	NC_GLOBAL	people_3_affiliation_acronym	String	WHOI BCO-DMO
attribute	NC_GLOBAL	people_3_person_name	String	Hannah Ake
attribute	NC_GLOBAL	people_3_person_nid	String	650173
attribute	NC_GLOBAL	people_3_role	String	BCO-DMO Data Manager
attribute	NC_GLOBAL	people_3_role_type	String	related
attribute	NC_GLOBAL	project	String	LittleLagoonGroundwater
attribute	NC_GLOBAL	projects_0_acronym	String	LittleLagoonGroundwater
attribute	NC_GLOBAL	projects_0_description	String	This project investigated the link between submarine groundwater discharge (SGD) and microalgal dynamics in Little Lagoon, Alabama.  In contrast to most near-shore environments, it is fully accessible; has no riverine inputs; and is large enough to display ecological diversity (c. 14x 0.75 km) yet small enough to be comprehensively sampled on appropriate temporal and spatial scales. The PIs have previously demonstrated that the lagoon is a hot-spot for toxic blooms of the diatom Pseudo-nitzchia spp. that are correlated with discharge from the surficial aquifer. This project assessed variability in SGD, the dependence of benthic nutrient fluxes on microphytobenthos (MPB) abundance and productivity, and the response of the phytoplankton to nutrient enrichment and dilution. The work integrated multiple temporal and spatial scales and demonstrated both the relative importance of SGD vs. benthic recycling as a source of nutrients, and the role of SGD in structuring the microalgal community. (paraphrased from Award abstract)
attribute	NC_GLOBAL	projects_0_end_date	String	2014-08
attribute	NC_GLOBAL	projects_0_geolocation	String	southern Alabama, east of Mobile
attribute	NC_GLOBAL	projects_0_name	String	Groundwater Discharge, Benthic Coupling and Microalgal Community Structure in a Shallow Coastal Lagoon
attribute	NC_GLOBAL	projects_0_project_nid	String	491318
attribute	NC_GLOBAL	projects_0_start_date	String	2010-03
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	standard_name_vocabulary	String	CF Standard Name Table v55
attribute	NC_GLOBAL	subsetVariables	String	Year
attribute	NC_GLOBAL	summary	String	Potential denitrification and N2 fixation from slurry assays from Little Lagoon, Alabama collected from 2012-2013
attribute	NC_GLOBAL	title	String	[Denitrification and nitrogen fixation] - Potential denitrification and N2 fixation from slurry assays from Little Lagoon, Alabama collected from 2012-2013 (Groundwater Discharge, Benthic Coupling and Microalgal Community Structure in a Shallow Coastal Lagoon)
attribute	NC_GLOBAL	version	String	1
attribute	NC_GLOBAL	xml_source	String	osprey2erddap.update_xml() v1.3
variable	Year		byte
attribute	Year	_FillValue	byte	127
attribute	Year	actual_range	byte	1, 1
attribute	Year	bcodmo_name	String	unknown
attribute	Year	description	String	Year ID that samples were taken
attribute	Year	long_name	String	Year
attribute	Year	units	String	unitless
variable	Date		String
attribute	Date	bcodmo_name	String	date
attribute	Date	description	String	Month and day that samples were taken; MMM-DD
attribute	Date	long_name	String	Date
attribute	Date	nerc_identifier	String	https://vocab.nerc.ac.uk/collection/P01/current/ADATAA01/
attribute	Date	units	String	unitless
variable	Value_Description		String
attribute	Value_Description	bcodmo_name	String	unknown
attribute	Value_Description	description	String	Description of the measurment taken; description includes relevant units for each sample taken
attribute	Value_Description	long_name	String	Value Description
attribute	Value_Description	units	String	unitless
variable	Mouth		float
attribute	Mouth	_FillValue	float	NaN
attribute	Mouth	actual_range	float	1.19, 13.8
attribute	Mouth	bcodmo_name	String	N
attribute	Mouth	description	String	Denitrification and Nitrogen fixation values collected at the site Mouth; location of site is 30.243683, -87.738407
attribute	Mouth	long_name	String	Mouth
attribute	Mouth	units	String	nanomol of nitrogen per gram per hour
variable	Mouth_SE		float
attribute	Mouth_SE	_FillValue	float	NaN
attribute	Mouth_SE	actual_range	float	0.05, 1.59
attribute	Mouth_SE	bcodmo_name	String	N
attribute	Mouth_SE	description	String	Standard error of the values collected at the site Mouth
attribute	Mouth_SE	long_name	String	Mouth SE
attribute	Mouth_SE	units	String	nanomol of nitrogen per gram per hour
variable	West		float
attribute	West	_FillValue	float	NaN
attribute	West	actual_range	float	0.98, 14.72
attribute	West	bcodmo_name	String	N
attribute	West	description	String	Denitrification and Nitrogen fixation values collected at the site West; location of site is 30.247181, -87.767856
attribute	West	long_name	String	West
attribute	West	units	String	nanomol of nitrogen per gram per hour
variable	West_SE		float
attribute	West_SE	_FillValue	float	NaN
attribute	West_SE	actual_range	float	0.02, 0.74
attribute	West_SE	bcodmo_name	String	N
attribute	West_SE	description	String	Standard error of the values collected at the site West
attribute	West_SE	long_name	String	West SE
attribute	West_SE	units	String	nanomol of nitrogen per gram per hour
variable	East		float
attribute	East	_FillValue	float	NaN
attribute	East	actual_range	float	0.58, 14.56
attribute	East	bcodmo_name	String	N
attribute	East	description	String	Denitrification and Nitrogen fixation values collected at the site East; location of site is 30.253347, -87.724729
attribute	East	long_name	String	East
attribute	East	units	String	nanomol of nitrogen per gram per hour
variable	East_SE		float
attribute	East_SE	_FillValue	float	NaN
attribute	East_SE	actual_range	float	0.02, 2.94
attribute	East_SE	bcodmo_name	String	N
attribute	East_SE	description	String	Standard error of the values collected at the site East
attribute	East_SE	long_name	String	East SE
attribute	East_SE	units	String	nanomol of nitrogen per gram per hour

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.