ERDDAP > info > bcodmo_dataset_704359

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	[Change in denitrification - N2 flux] - Change in denitrification due to oyster reefs from the coast of North Carolina in 2010 (Microbial Regulation of Greenhouse Gas N2O Emission from Intertidal Oyster Reefs)		F   I   M	background			BCO-DMO	bcodmo_dataset_704359

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	Methodology from\u00a0Smyth, A. R., Piehler, M. F. and Grabowski, J. H. (2015), Habitat context influences nitrogen removal by restored oyster reefs. J Appl Ecol, 52: 716\u2013725. doi:[10.1111/1365-2664.12435](\\"https://onlinelibrary.wiley.com/doi/10.1111/1365-2664.12435/abstract\\") Within 4\u00a0h of collection, sediment cores were set up in a continuous flow core incubation system to measure steady-state nutrient and dissolved gas fluxes, described in Piehler & Smyth (2011). Briefly, cores were sealed with gas-tight lids, which had an inflow and outflow port. Water from a reservoir was pulled over the cores at a flow rate of 1\u00a0mL min\u22121. Triplicate dissolved gases and duplicate dissolved inorganic nitrogen samples were collected from the outflow and inflow periodically over the next 24\u00a0h. To examine how sediments from different habitat contexts responded to nitrate pulses, nitrate concentration in the reservoir water was elevated with NaNO3\u00a0(~800\u00a0\u03bcm) after 48\u00a0h of sampling. Dissolved gas and inorganic nitrogen samples were then collected for an additional 48\u00a0h. Incubations were conducted in the dark and at ambient temperature (30\u00a0\u00b0C). Water samples from laboratory experiments were\u00a0analysed\u00a0immediately upon collection for dissolved gasses (N2,\u00a0O2\u00a0and Ar) with membrane inlet mass spectrometry (MIMS). Concentrations of dissolved N2\u00a0and O2\u00a0were determined using the ratio with Ar (Kana\u00a0et\u00a0al.\u00a01994). Coefficients of variation for N2/Ar were 0\u00b705% and 0\u00b704% for O2/Ar. Water samples from laboratory experiments for dissolved nutrient determination were filtered through Whatman GF/F glass\u00a0fibre\u00a0filters (25\u00a0mm diameter, 0\u00b77\u00a0\u03bcm nominal pore size) and frozen until analysis. Dissolved inorganic nutrients were analysed with a Lachat Quick-Chem 8000 automated ion analyser for\u00a0 [math formula] + [math formula] \u00a0(reported as NOx) and\u00a0 [math formula] \u00a0concentrations using standard protocols (Lachat Instruments, Milwaukee, WI, USA:\u00a0 [math formula] / [math formula] \u00a0method 31-107-04-1-A,\u00a0 [math formula] \u00a0method 31-107-06-1-A; detection limits: 0\u00b704\u00a0\u03bcm\u00a0NOx, 0\u00b718\u00a0\u03bcm\u00a0 [math formula] ; CV(%): 0\u00b79% NOx\u00a0and 2\u00b76%\u00a0 [math formula] ). Upon completion of the incubations, the upper 2\u00a0cm of sediment in each core was sampled for organic matter content by mass difference from dried sediments before ignition (105\u00a0\u00b0C for 6\u00a0h) and after ignition (525\u00a0\u00b0C for 3\u00a0h). Water Quality Data: \u00a0
attribute	NC_GLOBAL	awards_0_award_nid	String	568863
attribute	NC_GLOBAL	awards_0_award_number	String	OCE-1233372
attribute	NC_GLOBAL	awards_0_data_url	String	http://www.nsf.gov/awardsearch/showAward.do?AwardNumber=1233372
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	Change in denitrification due to oyster reefs M. Piehler, B.K. Song, C. Tobias, and M. Brush, PIs Version 6 June 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	2017-06-07T00:02:55Z
attribute	NC_GLOBAL	date_modified	String	2019-03-28T17:54:06Z
attribute	NC_GLOBAL	defaultDataQuery	String	&time<now
attribute	NC_GLOBAL	doi	String	10.1575/1912/bco-dmo.704359.1
attribute	NC_GLOBAL	Easternmost_Easting	double	-76.6107833
attribute	NC_GLOBAL	geospatial_lat_max	double	34.6939667
attribute	NC_GLOBAL	geospatial_lat_min	double	34.68235
attribute	NC_GLOBAL	geospatial_lat_units	String	degrees_north
attribute	NC_GLOBAL	geospatial_lon_max	double	-76.6107833
attribute	NC_GLOBAL	geospatial_lon_min	double	-76.6226
attribute	NC_GLOBAL	geospatial_lon_units	String	degrees_east
attribute	NC_GLOBAL	infoUrl	String	https://www.bco-dmo.org/dataset/704359
attribute	NC_GLOBAL	institution	String	BCO-DMO
attribute	NC_GLOBAL	instruments_0_acronym	String	IR Mass Spec
attribute	NC_GLOBAL	instruments_0_dataset_instrument_nid	String	704369
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	IRMS
attribute	NC_GLOBAL	instruments_1_acronym	String	Nutrient Autoanalyzer
attribute	NC_GLOBAL	instruments_1_dataset_instrument_description	String	Used to analyze dissolved inorganic nutrients
attribute	NC_GLOBAL	instruments_1_dataset_instrument_nid	String	704519
attribute	NC_GLOBAL	instruments_1_description	String	Nutrient Autoanalyzer is a generic term used when specific type, make and model were not specified. In general, a Nutrient Autoanalyzer is an automated flow-thru system for doing nutrient analysis (nitrate, ammonium, orthophosphate, and silicate) on seawater samples.
attribute	NC_GLOBAL	instruments_1_instrument_external_identifier	String	https://vocab.nerc.ac.uk/collection/L05/current/LAB04/
attribute	NC_GLOBAL	instruments_1_instrument_name	String	Nutrient Autoanalyzer
attribute	NC_GLOBAL	instruments_1_instrument_nid	String	558
attribute	NC_GLOBAL	instruments_1_supplied_name	String	Lachat Quick-Chem 8000 automated ion analyzer
attribute	NC_GLOBAL	instruments_2_dataset_instrument_description	String	Used to collect water quality data
attribute	NC_GLOBAL	instruments_2_dataset_instrument_nid	String	704520
attribute	NC_GLOBAL	instruments_2_description	String	Records temperature data over a period of time.
attribute	NC_GLOBAL	instruments_2_instrument_name	String	Temperature Logger
attribute	NC_GLOBAL	instruments_2_instrument_nid	String	639396
attribute	NC_GLOBAL	instruments_2_supplied_name	String	YSI 600 Series Sonde and Model 650 data logger
attribute	NC_GLOBAL	keywords	String	area, bco, bco-dmo, biological, chemical, data, dataset, date, dmo, dN2, erddap, latitude, longitude, management, nutrients, oceanography, office, preliminary, time
attribute	NC_GLOBAL	license	String	https://www.bco-dmo.org/dataset/704359/license
attribute	NC_GLOBAL	metadata_source	String	https://www.bco-dmo.org/api/dataset/704359
attribute	NC_GLOBAL	Northernmost_Northing	double	34.6939667
attribute	NC_GLOBAL	param_mapping	String	{'704359': {'lat': 'master - latitude', 'lon': 'master - longitude'}}
attribute	NC_GLOBAL	parameter_source	String	https://www.bco-dmo.org/mapserver/dataset/704359/parameters
attribute	NC_GLOBAL	people_0_affiliation	String	University of North Carolina at Chapel Hill
attribute	NC_GLOBAL	people_0_affiliation_acronym	String	UNC-Chapel Hill
attribute	NC_GLOBAL	people_0_person_name	String	Michael F. Piehler
attribute	NC_GLOBAL	people_0_person_nid	String	522931
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	Virginia Institute of Marine Science
attribute	NC_GLOBAL	people_1_affiliation_acronym	String	VIMS
attribute	NC_GLOBAL	people_1_person_name	String	Mark J. Brush
attribute	NC_GLOBAL	people_1_person_nid	String	568861
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	Virginia Institute of Marine Science
attribute	NC_GLOBAL	people_2_affiliation_acronym	String	VIMS
attribute	NC_GLOBAL	people_2_person_name	String	Bongkeun Song
attribute	NC_GLOBAL	people_2_person_nid	String	51729
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 Connecticut
attribute	NC_GLOBAL	people_3_affiliation_acronym	String	UConn - Avery Point
attribute	NC_GLOBAL	people_3_person_name	String	Craig Tobias
attribute	NC_GLOBAL	people_3_person_nid	String	51731
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	University of North Carolina at Chapel Hill
attribute	NC_GLOBAL	people_4_affiliation_acronym	String	UNC-Chapel Hill
attribute	NC_GLOBAL	people_4_person_name	String	Michael F. Piehler
attribute	NC_GLOBAL	people_4_person_nid	String	522931
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	Oyster Reef N2O Emission
attribute	NC_GLOBAL	projects_0_acronym	String	Oyster Reef N2O Emission
attribute	NC_GLOBAL	projects_0_description	String	Extracted from the NSF award abstract: Oyster reefs are biogeochemical hot spots and prominent estuarine habitats that provide disproportionate ecological function. Suspension-feeding eastern oysters, Crassostrea virginica, are capable of improving water quality and diminishing eutrophication by filtering nutrients and particles from the water and depositing them in the sediments. Remineralization of these deposits may enhance sedimentary denitrification that facilitates nitrogen removal in tidal estuaries. However, the scientific underpinning of oyster reef function has been challenged in various studies. In addition, recent studies of filter feeding invertebrates reported the production of nitrous oxide (N2O), a greenhouse gas, as an end product of incomplete denitrification by gut microbes. C. virginica could be another source of N2O flux from intertidal habitats. Preliminary work indicated substantial N2O production from individual oysters. The estimated N2O production from high density oyster reefs may exceed the N2O flux measured from some estuaries. With the new discovery of N2O emission and uncertainty regarding eutrophication control, the ecological value of oyster reef restoration may become equivocal. This project will quantify N2O fluxes to understand the factors controlling N2O emission from oyster reefs. Sedimentary N processes will be examined to develop an oyster reef N model to estimate N2O emission from tidal creek estuaries relative to other N cycling processes. The PIs hypothesize that intertidal oyster reefs are a substantial source of N2O emission from estuarine ecosystems and the magnitude of emission may be linked to water quality. If substantial N2O flux from oyster reefs is validated, ecological benefits of oyster reef restoration should be reevaluated. This interdisciplinary research team includes a microbial ecologist, a biogeochemist, an ecologist and an ecosystem modeler. They will utilize stable isotope and molecular microbiological techniques to quantify oyster N2O production, elucidate microbial sources of N2O emission from oysters and sediments, and estimate seasonal variation of N2O fluxes from oyster reefs. Measurements from this study will be integrated into a coupled oyster bioenergetics-sediment biogeochemistry model to compare system level rates of N cycling on oyster reefs as a function of oyster density and water quality. Modeling results will be used to assess the relative trade-­offs of oyster restoration associated with N cycling. They expect to deliver the following end products:1) estimation of annual N2O flux from oyster reefs as an additional source of greenhouse gases from estuaries, 2) a better understanding of the environmental and microbial factors influencing N2O and N2 fluxes in tidal estuaries, 3) transformative knowledge for the effect of oyster restoration on water quality enhancement and ecosystem function, 4) direct guidance for oyster restoration projects whose goals include water quality enhancement, and 5) a modeling tool for use in research and restoration planning.
attribute	NC_GLOBAL	projects_0_end_date	String	2015-08
attribute	NC_GLOBAL	projects_0_name	String	Microbial Regulation of Greenhouse Gas N2O Emission from Intertidal Oyster Reefs
attribute	NC_GLOBAL	projects_0_project_nid	String	527289
attribute	NC_GLOBAL	projects_0_start_date	String	2012-12
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	34.68235
attribute	NC_GLOBAL	standard_name_vocabulary	String	CF Standard Name Table v55
attribute	NC_GLOBAL	summary	String	Change in denitrification due to oyster reefs from the coast of North Carolina in 2010
attribute	NC_GLOBAL	title	String	[Change in denitrification - N2 flux] - Change in denitrification due to oyster reefs from the coast of North Carolina in 2010 (Microbial Regulation of Greenhouse Gas N2O Emission from Intertidal Oyster Reefs)
attribute	NC_GLOBAL	version	String	1
attribute	NC_GLOBAL	Westernmost_Easting	double	-76.6226
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 of collection; 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	area		String
attribute	area	bcodmo_name	String	site
attribute	area	description	String	Type of substrate where oysters were measured
attribute	area	long_name	String	Area
attribute	area	units	String	unitless
variable	location		byte
attribute	location	_FillValue	byte	127
attribute	location	actual_range	byte	1, 3
attribute	location	bcodmo_name	String	site
attribute	location	description	String	PI issued location IDs that correspond to specific coordinates and experimental treatments
attribute	location	long_name	String	Location
attribute	location	units	String	unitless
variable	latitude		double
attribute	latitude	_CoordinateAxisType	String	Lat
attribute	latitude	_FillValue	double	NaN
attribute	latitude	actual_range	double	34.68235, 34.6939667
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
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	-76.6226, -76.6107833
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
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	nutrients		String
attribute	nutrients	bcodmo_name	String	treatment
attribute	nutrients	description	String	Indication of whether or not experimental levels of nutrients were used
attribute	nutrients	long_name	String	Nutrients
attribute	nutrients	units	String	unitless
variable	dN2		double
attribute	dN2	_FillValue	double	NaN
attribute	dN2	actual_range	double	-56.75696135, 517.4479587
attribute	dN2	bcodmo_name	String	unknown
attribute	dN2	description	String	Change in denitrification (N2 flux) due to the oyster reef. Calculated by difference from reef and control in each location.
attribute	dN2	long_name	String	D N2
attribute	dN2	units	String	umol N m-2 hr-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.