1b:I[42426,["/_next/static/immutable/chunks/1xctgzqre-wsy.js","/_next/static/immutable/chunks/06_-wz6pdtp2b.js","/_next/static/immutable/chunks/30e52g49hg40p.js","/_next/static/immutable/chunks/02yq6tul2z-oh.js","/_next/static/immutable/chunks/10bx_ec2vj7n_.js","/_next/static/immutable/chunks/33bfn03fo8xnt.js","/_next/static/immutable/chunks/0tfjf78scu61b.js","/_next/static/immutable/chunks/31xnvej4n1bi9.js"],"default"] 1c:T119b,

This methodology section describes this dataset and other closely related datasets collected as part of this study (see "Related Datasets").

Corals (Balanophyllia elegans, LSID=urn:lsid:marinespecies.org:taxname:286920) were collected by divers using blunt-tipped diving knives to remove corals from vertical rock walls at 10-20 m depths. A subset of the corals were immediately frozen for determination of N isotope ratios of tissue and skeleton. Another subset of corals were shipped live overnight to St. Olaf College for the culture experiments.

For the culture experiment, corals were divided into four groups that were each fed Artemia (LSID=urn:lsid:marinespecies.org:taxname:480245) nauplii with a different known d15N. The coral tissue was sampled at discrete intervals over the course of the experiment as described below.

For the starvation experiment, corals were split into two group, starved and unstarved. The starved group was fed once every two weeks and the unstarved corals were fed twice a week. The coral tissue was sampled at discrete intervals throughouth the experiment as described below.

Once separated from the skeleton, coral tissue was lyophilized and analyzed using a Costech Elemental Analyzer Isotope Ratio Mass Spectrometer.

Once separated from the coral tissue, the coral skeletons were rinsed and ultrasonicated two times in Milli-Q water, then ultrasonicated in 1% sodium hypochlorite in 20 minute intervals until no tissue remained on the skeleton. The skeletons were then prepared following the methods of Wang et al (2014). The skeleton was ground to a powder using a mortar and pestle, then rinsed with sodium hypochlorite to remove any remaining tissue. The skeletal materials were then dissolved with 4N hydrochloric acid, then oxidized to nitrate by autoclaving in a basic potassium persulfate solution. Skeletal material was oxidized in tandem with standards of glutamine reference material USGS-40 and USGS-41. The samples were then analyzed by Gas Chromatography- Isotope Ratio Mass Spectrometry using the denitrifier method (Sigman et al., 2001). In brief, the denitrifier method uses the denitfrying bacteria Pseudomonas chlororaphis f. sp. aureofaciens to convert nitrate to nitrous oxide. P. aureofaciens was grown in media amended with 10mM nitrate in stoppered glass bottles for 7-10 days before being harvested and resuspended in nitrate free media. Three milliliters of resuspended bacteria was allocated to 20mL headspace vials which were sparged with dinitrogen gas for 6 hours. Nitrate sample solutions were injected into vials (target of 20nmol nitrogen for seawater samples and 7nmol for skeletal matrix samples) and incubated overnight to allow for the complete conversation of nitrate to nitrous oxide. The nitrous oxide was extracted and purified using a Thermo Gas Bench II with a GC Pal autosampler and dual cold traps and analyzed on a Thermo Advantage continuous flow isotope ratio mass spectrometer. Analyzes were referenced to N2O injected from a pure gas cylinder and standardized through comparison potassium nitrate reference materials International Atomic Energy Agency Nitrate (IAEA-N3) and the isotopic nitrate reference material from the United States Geological Survey 34 (USGS-34).

Artemia nauplii samples were stored frozen then lyophilized prior to analysis on the Elemental Analyzer Isotope Ratio Mass Spectrometer.

Nitrate samples were collected with Van-Doren Sampler and filtered with pre-combusted glass fiber filters (GF/F, 0.7uM nominal pore size). The nitrate concentrations were determined using reduction to nitrous oxide in hot vanadium III solution followed by chemiluminescence detection of nitrous oxide on a Teledyne chemiluminescence NOx analyzer Model T200. The nitrogen and oxygen isotopes of nitrate were analyzed with the denitrifier method on an IRMS (described above).

Suspended particulate organic matter was collected with a Van-Doren Sampler and then collected on pre-combusted GF/F. The filters were lyophilized prior to analysis on an EA-IRMS.

Net tow material was collected with plankton nets with mesh sizes ranging from 80uM, 120uM, and 150uM. The net tow material was filtered and collected on a pre-combusted GF/F which was lyophilized prior to analysis on the EA.

Hydrologic depth profiles were characterized with a CastAway-CTD profiler.

1d:T78c,Particulate data collected near Friday Harbor, WA between 2020 and 2021.These data were collected as part of the following study: Data collected as part of this study include nitrogen isotope ratio data for coral tissue and skeleton of the scleractinian cold-water coral Balanophyllia elegans collected at Friday Harbor, WA. Data was collected between March 2019 and August 2021. These data include paired measurements of the N isotope ratio (d15N) of coral tissue and skeleton. Tissue was measured using and Elemental Analyzer (EA)-coupled Isotope Ratio Mass Spectrometer (IRMS) and skeleton samples were first dissolved and organic nitrogen was oxidized to nitrate with persulfate before being run on a GC-IRMS with the denitrifier method. These data also include the results of two culture experiments with the same species of corals. The corals in the first culture experiment were fed Artemia diets with different known d15N in order to quantify change in the tissue d15N in response to a change in the food source and to determine the offset in d15N between the coral tissue and its diet. The starvation trial culture experiment was conducted to evaluate the effects of starvation on the d15N of coral tissue. For both experiments coral tissue was analyzed using an EA-IRMS. This data also includes the d15N of the respective Artemia diets. Finally, included in this data is hydrological and particulate matter data collect at the site the corals were collected (near Friday Harbor, WA). This data includes nitrate d15N and d18O, suspended particulate organic matter d15N, net tow material d15N, and data collected from a CTD profiler. This data enhances the understanding of cold-water coral diet and trophic position. This data improves the understanding of the relationship between surface nitrate d15N and the d15N recorded in the coral skeleton which is useful for enhancing the resolution of coral d15N paleoproxies. 1e:T604,An on-line gas preparation and introduction system for isotope ratio mass spectrometry that is designed for high precision isotope and molecular ratio determination of headspace samples, including water equilibration, carbonates and atmospheric gases. The instrument allows for the use of a dual viscous flow inlet system of repetitive measurements of sample and standard gas on a continuous flow isotope ratio mass spectrometer (CF-IRMS) system. The sample volume is the sample vial (instead of a metal bellows), and the reference gas volume is a pressurized gas tank. The instrument consists of a user programmable autosampler, a gas sampling system, a maintenance-free water removal system, a loop injection system, an isothermal gas chromatograph (GC), an active open split interface, a reference gas injection system with three reference ports, and one or two optional LN2 traps for cryofocusing. The gas sampling system includes a two port needle which adds a gentle flow of He into the sample vial, diluting and displacing sample gas. Water is removed from the sample gas through diffusion traps. The loop injector aliquots the sample gas onto the GC column, which separates the molecular species. The reference gas injection system allows accurate referencing of each sample aliquot to isotopic standards. The system can be used with several options including a carbonate reaction kit that allows injection of anhydrous phospohric acid into sample vials. Note "Finnigan GasBench-II" is the previous brand name of this instrument.1f:Te93,NSF abstract: Refining the use of scleractinian cold-water coral skeleton-bound d15N as a proxy for marine N cycling Recent studies show that cold-water corals and their skeletons provide valuable information about the marine nitrogen (N) cycle. This information can shed light on the processes that both drive and respond to changes in Earth’s climate. Cold-water corals are found across the global ocean and can be dated with decadal precision, offering spatial and temporal records of the N cycle in the past. In addition, a single skeleton can be used to reconstruct both surface and deep ocean composition. Despite the promise of cold-water corals, we don’t fully understand how they record changes in the marine N cycle. We must strengthen this understanding before we use cold-water corals to produce reliable records of marine N cycling across space and time, across different coral species, and under different lifestyle and feeding patterns. This project examines how the isotopic composition of organic N trapped in coral skeletons is linked to marine N cycle properties. The study includes a series of lab experiments, measurements of live corals sampled from the natural environment, and measurements of coral skeletal material from different ocean regions and depth horizons archived in museums. The project involves undergraduates at St. Olaf College, Pomona College and Mt. San Antonio College, one of the largest community colleges in Southern California. These students will conduct the research with scientists and peers in collaborating labs. Participation in the project will build student research skills and scientific knowledge for advanced study and prepare students for the scientific workforce. The project will also develop educational materials, including YouTube videos, to promote interest in marine science and awareness of how climate change influences global oceans. These educational materials will be created in collaboration with high school students from underrepresented groups. The main tool used to investigate marine N cycle history is the isotope composition of particulate organic nitrogen (δ15N-PON) exported from the euphotic zone, which can be accessed using sedimentary archives such as foraminiferal tests, anoxic sediments and soft corals. Recently, the δ15N of organic N trapped within asymbiotic scleractinian cold-water coral (CWC) skeletons has been shown to record the δ15N-PON exported from the surface ocean (Wang et al. 2014; Wang et al. 2017). In order to reliably apply CWC δ15N as a proxy, however, we must explain a ~8.5‰ offset between the δ15N of organic nitrogen within the CWC skeleton and the exported δ15N-PON in regions of coral growth (Wang et al. 2014). The nature of the δ15N offset must be accounted for to be confident that CWC records marine N cycle history consistently across space and time, across different coral species, and for corals with different lifestyle conditions. Through coral culture experiments, measurements of live corals samples from the natural environment, and archives of corals skeletal material from different ocean regions and depth horizons, this research will test whether the offset arises from: (1) a biosynthetic isotope offset between CWC tissue and skeleton, (2) an unusual trophic transfer between CWC tissue and diet, and/or (3) coral feeding on material with elevated δ15N relative to exported δ15N-PON. This work will also provide estimates of N turnover time in CWC, which are scant, and will inform trophic ecology of CWC. This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.6:["$","$L1b",null,{"dataset":{"_id":"919985","description":"

See \"Related Datasets\" section on this page to access data and metadata for datasets collected as part of the same study.

\n","problem":"","acquisition":"$1c","processing":"

Coral tissue and particulate matter was analyzed in tandem with the glutamine standards USGS-40 and USGS-41. These standards were used to correct the data from the EA-IRMS.

Coral skeleton material was oxidized in tandem with USGS-40 and USGS-41 which was used to correct for any oxidation blank. While IAEA-N3 and USGS-34 were used as standard material to correct the nitrate isotope data collected off the IRMS.

Data corrections were performed in Excel. The data reported here is averages of multiple runs when applicable. The uploaded data indicates when these are analytical replicates or sample replicates, all have n ≥ 2.

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The data submitter clarified the missing lat lon should be 48.547,-123.005 (appears as row 50 in the loaded BCO-DMO table since the header row isn't counted).\r\n\r\n* Date converted to ISO 8601 format.","title":"Particulate data collected near Friday Harbor, WA between 2020 and 2021 as part of a study of cold-water coral Balanophyllia elegans diet and trophic position","nickname":"B. elegans cold water coral lab culture: particulate data","dataUrl":"","currentState":"Final no updates expected","currentStateId":"7","validated":true,"restricted":false,"version":"1","version_date":"2024-02-09T05:00:00.000Z","abstract":"$1d","citation":"Gothmann, A. M., Granger, J., Prokopenko, M. (2024) Particulate data collected near Friday Harbor, WA between 2020 and 2021 as part of a study of cold-water coral Balanophyllia elegans diet and trophic position. Biological and Chemical Oceanography Data Management Office (BCO-DMO). 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York"},"performedAtOrganization":{"_id":"191","name":"Woods Hole Oceanographic Institution"}}],"deployments":[],"funding":[{"_id":"893810","name":"OCE-1949119","fundingSource":{"_id":"355","name":"NSF Division of Ocean Sciences"},"url":"https://www.nsf.gov/awardsearch/show-award?AWD_ID=1949119"},{"_id":"893815","name":"OCE-1949984","fundingSource":{"_id":"355","name":"NSF Division of Ocean Sciences"},"url":"https://www.nsf.gov/awardsearch/show-award?AWD_ID=1949984"},{"_id":"893821","name":"OCE-1949132","fundingSource":{"_id":"355","name":"NSF Division of Ocean Sciences"},"url":"https://www.nsf.gov/awardsearch/show-award?AWD_ID=1949132"}],"instruments":[{"_id":"937095","name":"Teledyne chemiluminescence NOx analyzer Model T200","description":"","type_id":"542895","type_name":"Chemiluminescence NOx Analyzer","type_desc":"The chemiluminescence method for gas analysis of oxides of nitrogen relies on the measurement of light produced by the gas-phase titration of nitric oxide and ozone. A chemiluminescence analyzer can measure the concentration of NO/NO2/NOX.\r\n\r\nOne example is the Teledyne Model T200: https://www.teledyne-api.com/products/nitrogen-compound-instruments/t200","type_acronym":""},{"_id":"937902","name":"Costech Elemental Analyzer","description":"","type_id":"546339","type_name":"Elemental Analyzer","type_desc":"Instruments that quantify carbon, nitrogen and sometimes other elements by combusting the sample at very high temperature and assaying the resulting gaseous oxides. Usually used for samples including organic material.","type_acronym":""},{"_id":"937900","name":"Thermo Advantage continuous flow isotope ratio mass spectrometer","description":"","type_id":"469","type_name":"Isotope-ratio Mass Spectrometer","type_desc":"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).","type_acronym":"IR Mass Spec; IRMS"},{"_id":"937094","name":"","description":"Net tow material was collected with plankton nets with mesh sizes ranging from 80uM, 120uM, and 150uM.","type_id":"525","type_name":"Plankton Net","type_desc":"A Plankton Net is a generic term for a sampling net that is used to collect plankton. It is used only when detailed instrument documentation is not available.","type_acronym":"Plankton Net"},{"_id":"937901","name":"Thermo Gas Bench II with a GC Pal autosampler","description":"","type_id":"826897","type_name":"Thermo-Fisher Scientific Gas Bench II","type_desc":"$1e","type_acronym":"GasBench II"},{"_id":"937093","name":"","description":"Suspended particulate organic matter was collected with a Van-Doren Sampler and then collected on pre-combusted GF/F. The filters were lyophilized prior to analysis on an EA-IRMS.","type_id":"755357","type_name":"Van Dorn water sampler","type_desc":"A free-flushing water sample bottle comprising a cylinder (polycarbonate, acrylic or PVC) with a stopper at each end. The bottle is closed by means of a messenger from the surface releasing the tension on a latex band and thus pulling the two stoppers firmly into place. A thermometer can be mounted inside the bottle. One or more bottles can be lowered on a line to allow sampling at a single or multiple depth levels. Van Dorn samplers are suitable for for physical (temperature), chemical and biological sampling in shallow to very deep water. Bottles are typically lowered vertically through the water column although a horizontal version is available for sampling near the seabed or at thermoclines or chemoclines. Because of the lack of metal parts the bottles are suitable for trace metal sampling, although the blue polyurethane seal used in the Alpha version may leach mercury. The Beta version uses white ASA plastic seals that do not leach mercury but are less durable.","type_acronym":""}],"parameters":[{"_id":"937073","name":"Sample_ID","format":"","frictionlessType":"string","description":"

Name given to identify each sample

","units":{"_id":"","name":"unitless"},"type":{"_id":"960","name":"sample","description":"

unique sample identification or number; any combination of alpha numeric characters; precise definition is file dependent

"}},{"_id":"937074","name":"Date_Collected","format":"%Y-%m-%d","frictionlessType":"date","description":"

Date specimen or samples were collected

","units":{"_id":"","name":"unitless"},"type":{"_id":"1070","name":"date","description":"

date; generally reported in GMT as YYYYMMDD (year; month; day); also as MMDD (month; day); EqPac dates are local Hawaii time. ISO_Date format is YYYY-MM-DD (http://www.iso.org/iso/home/standards/iso8601.htm)

"}},{"_id":"937075","name":"Location_collected","format":"","frictionlessType":"string","description":"

Description of the location the sample was collected

","units":{"_id":"","name":"unitless"},"type":{"_id":"1124","name":"site","description":"

Sampling site identification.

"}},{"_id":"937076","name":"Latitude","format":"","frictionlessType":"number","description":"

Latitude

","units":{"_id":"","name":"decimal degrees"},"type":{"_id":"730","name":"latitude","description":"

latitude, in decimal degrees, North is positive, negative denotes South; Reported in some datasets as degrees, minutes

"}},{"_id":"937077","name":"Longitude","format":"","frictionlessType":"number","description":"

Longitude

","units":{"_id":"","name":"decimal degrees"},"type":{"_id":"731","name":"longitude","description":"

longitude, in decimal degrees, East is positive, negative denotes West; Reported in some datasets as degrees, minutes

"}},{"_id":"937078","name":"Sample_type","format":"","frictionlessType":"string","description":"

Type of material sampled, either nutrients, SPOM (suspended organic matter), or net tow

","units":{"_id":"","name":"unitless"},"type":{"_id":"1741","name":"sample_descrip","description":"

text description or other traits of the sample collected

"}},{"_id":"937079","name":"Depth","format":"","frictionlessType":"number","description":"

Water depth of sample collected, in meters, when known

","units":{"_id":"","name":"meters"},"type":{"_id":"808","name":"depth","description":"

Observation/sample depth below the sea surface. Units often reported as: meters, feet.

\nWhen used in a JGOFS/GLOBEC dataset the depth is a best estimate; usually but not always calculated from pressure; calculated either from CTD pressure using Fofonoff and Millard (1982; UNESCO Tech Paper #44) algorithm adjusted for 1980 equation of state for seawater (EOS80) or simply equivalent to nominal depth as recorded during sampling if CTD pressure was unavailable.

"}},{"_id":"937080","name":"Mesh_size","format":"","frictionlessType":"string","description":"

Size of mesh filter for collecting net tow samples

","units":{"_id":"","name":"microns"},"type":{"_id":"1145","name":"net_mesh","description":"

net mesh size; generally used in conjunction with plankton tows

"}},{"_id":"937081","name":"NO3","format":"","frictionlessType":"number","description":"

Concentration of nitrate in the nutrient sample when applicable

","units":{"_id":"","name":"micromolar (uM)"},"type":{"_id":"1194","name":"NO3","description":"

Nitrate concentration in the water column

"}},{"_id":"937082","name":"d15N","format":"","frictionlessType":"number","description":"

Nitrogen isotopic ratio d15N

","units":{"_id":"","name":"permil (0/00)"},"type":{"_id":"711970","name":"d15N","description":"

delta 15N (d15N) is a measure of the ratio of stable isotopes 15N:14N. It is commonly reported in parts per thousand (per mil, 0/00).

"}},{"_id":"937083","name":"d15N_stdev","format":"","frictionlessType":"string","description":"

Standard deviation of d15N when more than one measurement was taken

","units":{"_id":"","name":"permil (0/00)"},"type":{"_id":"711970","name":"d15N","description":"

delta 15N (d15N) is a measure of the ratio of stable isotopes 15N:14N. It is commonly reported in parts per thousand (per mil, 0/00).

"}},{"_id":"937084","name":"d13C","format":"","frictionlessType":"number","description":"

Carbon isotopic ratio d13C

","units":{"_id":"","name":"permil (0/00)"},"type":{"_id":"671305","name":"d13C","description":"

Delta 13C (d13C) is the ratio of stable isotopes 13C:12C, reported in parts per thousand (per mil, ‰).

"}},{"_id":"937085","name":"d13C_stdev","format":"","frictionlessType":"string","description":"

Standard deviation of d13C when more than one measurement was taken

","units":{"_id":"","name":"permil (0/00)"},"type":{"_id":"671305","name":"d13C","description":"

Delta 13C (d13C) is the ratio of stable isotopes 13C:12C, reported in parts per thousand (per mil, ‰).

"}},{"_id":"937086","name":"d18O","format":"","frictionlessType":"number","description":"

Oxygen isotopic ratio of nutrient measurements d18O

","units":{"_id":"","name":"permil (0/00)"},"type":{"_id":"1632","name":"d18O","description":"

d18O is the isotope ratio of 18O to 16O. delta180.

"}},{"_id":"937087","name":"d18O_stdev","format":"","frictionlessType":"string","description":"

Standard deviation of d18O when more than one measurement was taken

","units":{"_id":"","name":"permil (0/00)"},"type":{"_id":"1632","name":"d18O","description":"

d18O is the isotope ratio of 18O to 16O. delta180.

"}},{"_id":"937088","name":"Molar_C_to_N_ratio","format":"","frictionlessType":"number","description":"

Molar ratio of carbon to nitrogen

","units":{"_id":"","name":"unitless"},"type":{"_id":"1186","name":"C_to_N","description":"

Carbon to Nitrogen ratio (C:N)

"}}],"related_publications":[{"id":"739214","citation":"Sigman, D. M., Casciotti, K. L., Andreani, M., Barford, C., Galanter, M., & Böhlke, J. K. (2001). A Bacterial Method for the Nitrogen Isotopic Analysis of Nitrate in Seawater and Freshwater. Analytical Chemistry, 73(17), 4145–4153. doi:10.1021/ac010088e\r\n","relation_type":["Methods"],"relation_desc":""}],"related_datasets":[{"_id":"920001","name":"B. elegans cold water coral lab culture: CTD","url":"","relation_type":"IsRelatedTo","type_desc":"

The dataset is related to another dataset.

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