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Title Sum-
Institution Dataset ID
     data   graph     files  public Change in denitrification due to oyster reefs from the coast of North Carolina in 2010    ?     I   M   background (external link) RSS Subscribe 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.

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

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:

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 (external link)
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/ (external link)
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 (external link)
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/ (external link)
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/ (external link)
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 (external link)
attribute NC_GLOBAL metadata_source String https://www.bco-dmo.org/api/dataset/704359 (external link)
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 (external link)
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 due to oyster reefs from the coast of North Carolina in 2010
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/ (external link)
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/ (external link)
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/ (external link)
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.

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