ERDDAP > info > bcodmo_dataset_723984

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	Sediment oxygen demand and ammonium, nitrate plus nitrate, and phosphate flux data from Little Lagoon, Alabama		I   M	background			BCO-DMO	bcodmo_dataset_723984

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. Benthic fluxes from intact sediment cores At each site triplicate intact sediment cores (270 mm x 95 mm ID; 190 mm sediment, 50 mm water column) were collected and setup in a flow-through system (Lavrentyev et al. 2000) in a darkened environmental chamber set to the average site temperature within 8 hours of collection. The flow-through system consisted of a multichannel proportioning pump that sent 0.7 micron filtered and ~100 \u03bcM Na15NO3 - (99 atom %) enriched site water (\u201cinflow\u201d) at a continuous flow rate (1.2 mL min-1) to the overlying water above the sediment surface. The positive displacement of the overlying water exited the core through an outflow tube (\u201coutflow\u201d) and collected in a reservoir. The volume of water overlying each sediment core was exchanged five times during a 24-hour incubation period to equilibrate the cores (Eyre et al. 2002). After the initial 24 hours, triplicate inflow and outflow samples were collected at 36 hours for dissolved gas and nutrient analysis. Dissolved gas analysis followed the modified Isotope pairing technique (IPT) (Nielsen 1992, Risgaard-Petersen et al. 2003). In this approach, rates of 29N2 and 30N2 production from 15NO3 - are quantified and used to calculate rates of 14N2 production (p14) (equation 1, below); when combined with 15N tracer slurry incubations (below), rates of anammox, and the relative contribution of anammox and denitrification to p14 can be determined (equations 2-4, below). Water samples were collected in 12 mL Exetainers, allowing the vial to overflow two times the tube volume prior to preservation with 250 \u03bcL of 50% (w/v) ZnCl2 before being capped. Samples were stored under water in the environmental chamber until dissolved gas analysis on a membrane inlet mass spectrometer (MIMS) equipped with a copper reduction column set at 600oC to remove oxygen (O2) (Kana et al. 1998, Eyre et al. 2002). Benthic nutrient flux samples were filtered (0.7 micron) and immediately frozen until DIN (NO2 -, NO3 -, NH4 +) and PO4 3- analyses as described above. Sediment oxygen demand (SOD) was measured from oxygen concentrations in inflow and outflow water analyzed with a calibrated microelectrode and a Unisense \u00ae multimeter analyzer. Denitrification and benthic flux calculations (\u03bcmol m-2 hr-1) determined flux into or out of the sediment using the influent and effluent concentrations, flow rate (1.2 ml min-1), and the surface area of the sediment (0.00708 m-2). All rates and fluxes pertaining to N species are expressed on a N atom basis. A positive flux indicates release from the sediments to the water column and a negative flux indicates uptake by the sediment. 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	Benthic Flux 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	2018-01-17T20:12:09Z
attribute	NC_GLOBAL	date_modified	String	2019-03-15T14:17:51Z
attribute	NC_GLOBAL	defaultDataQuery	String	&time<now
attribute	NC_GLOBAL	doi	String	10.1575/1912/bco-dmo.723984.1
attribute	NC_GLOBAL	infoUrl	String	https://www.bco-dmo.org/dataset/723984
attribute	NC_GLOBAL	institution	String	BCO-DMO
attribute	NC_GLOBAL	instruments_0_acronym	String	Gas Analyzer
attribute	NC_GLOBAL	instruments_0_dataset_instrument_description	String	Used to analyze sediment oxygen demand
attribute	NC_GLOBAL	instruments_0_dataset_instrument_nid	String	724404
attribute	NC_GLOBAL	instruments_0_description	String	Gas Analyzers - Instruments for determining the qualitative and quantitative composition of gas mixtures.
attribute	NC_GLOBAL	instruments_0_instrument_name	String	Gas Analyzer
attribute	NC_GLOBAL	instruments_0_instrument_nid	String	720
attribute	NC_GLOBAL	instruments_0_supplied_name	String	Unisense multimeter analyzer
attribute	NC_GLOBAL	instruments_1_dataset_instrument_description	String	Used to filter sediment cores
attribute	NC_GLOBAL	instruments_1_dataset_instrument_nid	String	724402
attribute	NC_GLOBAL	instruments_1_description	String	A pump is a device that moves fluids (liquids or gases), or sometimes slurries, by mechanical action. Pumps can be classified into three major groups according to the method they use to move the fluid: direct lift, displacement, and gravity pumps
attribute	NC_GLOBAL	instruments_1_instrument_name	String	Pump
attribute	NC_GLOBAL	instruments_1_instrument_nid	String	726
attribute	NC_GLOBAL	instruments_1_supplied_name	String	Multichannel proportioning pump
attribute	NC_GLOBAL	instruments_2_acronym	String	MIMS
attribute	NC_GLOBAL	instruments_2_dataset_instrument_description	String	Used for dissolved gas analysis
attribute	NC_GLOBAL	instruments_2_dataset_instrument_nid	String	724403
attribute	NC_GLOBAL	instruments_2_description	String	Membrane-introduction mass spectrometry (MIMS) is a method of introducing analytes into the mass spectrometer's vacuum chamber via a semipermeable membrane.
attribute	NC_GLOBAL	instruments_2_instrument_name	String	Membrane Inlet Mass Spectrometer
attribute	NC_GLOBAL	instruments_2_instrument_nid	String	661606
attribute	NC_GLOBAL	instruments_2_supplied_name	String	MIMS
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/723984/license
attribute	NC_GLOBAL	metadata_source	String	https://www.bco-dmo.org/api/dataset/723984
attribute	NC_GLOBAL	param_mapping	String	{'723984': {}}
attribute	NC_GLOBAL	parameter_source	String	https://www.bco-dmo.org/mapserver/dataset/723984/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	summary	String	Sediment oxygen demand and ammonium, nitrate plus nitrate, and phosphate flux data from Little Lagoon, Alabama from 2010-2013
attribute	NC_GLOBAL	title	String	Sediment oxygen demand and ammonium, nitrate plus nitrate, and phosphate flux data from Little Lagoon, Alabama
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, 2
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	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	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	East		float
attribute	East	_FillValue	float	NaN
attribute	East	actual_range	float	-8369.1, 16171.0
attribute	East	bcodmo_name	String	unknown
attribute	East	description	String	Benthic flux values from the East site; location of site is 30.253347, -87.724729
attribute	East	long_name	String	East
attribute	East	units	String	umol m-2 hr-1; umol m-2 d-1
variable	East_SE		float
attribute	East_SE	_FillValue	float	NaN
attribute	East_SE	actual_range	float	0.02, 2587.7
attribute	East_SE	bcodmo_name	String	unknown
attribute	East_SE	description	String	Standard error of the benthic flux values from the East site
attribute	East_SE	long_name	String	East SE
attribute	East_SE	units	String	umol m-2 hr-1; umol m-2 d-1
variable	Mouth		float
attribute	Mouth	_FillValue	float	NaN
attribute	Mouth	actual_range	float	-7083.4, 12198.9
attribute	Mouth	bcodmo_name	String	unknown
attribute	Mouth	description	String	Benthic flux values from the Mouth site; location of site is 30.243683, -87.738407
attribute	Mouth	long_name	String	Mouth
attribute	Mouth	units	String	umol m-2 hr-1; umol m-2 d-1
variable	Mouth_SE		float
attribute	Mouth_SE	_FillValue	float	NaN
attribute	Mouth_SE	actual_range	float	0.03, 1680.1
attribute	Mouth_SE	bcodmo_name	String	unknown
attribute	Mouth_SE	description	String	Standard error of the benthic flux values from the Mouth site
attribute	Mouth_SE	long_name	String	Mouth SE
attribute	Mouth_SE	units	String	umol m-2 hr-1; umol m-2 d-1
variable	West		float
attribute	West	_FillValue	float	NaN
attribute	West	actual_range	float	-9539.0, 22500.5
attribute	West	bcodmo_name	String	unknown
attribute	West	description	String	Benthic flux values from the West site; location of site is 30.247181, -87.767856
attribute	West	long_name	String	West
attribute	West	units	String	umol m-2 hr-1; umol m-2 d-1
variable	West_SE		float
attribute	West_SE	_FillValue	float	NaN
attribute	West_SE	actual_range	float	0.03, 5017.6
attribute	West_SE	bcodmo_name	String	unknown
attribute	West_SE	description	String	Standard error of the benthic flux values from the West site
attribute	West_SE	long_name	String	West SE
attribute	West_SE	units	String	umol m-2 hr-1; umol m-2 d-1

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.