19: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"] 1a:T849,

Soil cores were collected from three sites within the Plum Island Ecosystems - Long Term Ecological Research (PIE-LTER) domain (MA, USA; 42.74° N, -70.85° W). A core liner was fitted with a gasketed piston and placed on the sediment surface and pushed down into the marsh subsurface, ensuring that the soil column did not compact during collection.

The sites had similar elevations (1.41 - 1.51 m North American Vertical Datum of 1988 [NAVD88]) and salt marsh grass communities, dominated by Spartina patens, S. alterniflora, and Distichlis spicata. Permanently inundated ponds within each site had comparable depths (0.24 - 0.30 m) but varied in size (643 - 7,149 m²) and age (40 - 53 years) (Spivak et al., 2017; Spivak et al., 2018).

Soil cores were split lengthwise and sectioned into 1, 2, or 5 cm sections, with higher resolution in the top 30 cm. Soil water content (%) and bulk density (g/cm³) were determined gravimetrically after drying to constant mass (60°C). Samples were sieved (1 mm) to remove root material and homogenized with a Retsch Mixer Mill 200.

The thermal reactivity of SOC was characterized through ramped pyrolysis oxidation (RPO). Homogenized soil samples (~6 mg) were exposed to a constant flow of ultra-high purity oxygen and helium gas mixture within a reactor, where temperatures ramped to 1000°C at a constant rate (20°C per min) (Rosenheim et al., 2008). The evolved carbon dioxide (CO2) was measured by a flow-through infrared gas analyzer and thermograms were constructed by plotting gas concentrations over time. Thermograms were normalized to the expected milligram of carbon evolved per gram of dry soil sample (mg C / g soil). Samples were not acidified as inorganic carbon content was 0.02% - 0.04% of TOC. Analyses were conducted at the National Ocean Sciences Accelerator Mass Spectrometry Facility (NOSAMS, Woods Hole, MA). We further analyzed the δ13C and Fm composition of CO2 evolved from marsh and pond soils at one representative site. Refer to Hemmingway et al. (2017) for a description of the NOSAMS RPO set up.

1b:T88e,Extracted from the NSF award abstract: This project will address how rates of benthic microalgal production respond to eutrophication and geomorphological changes in human-impacted tidal creeks. Excess nutrient loading increases benthic algal biomass and likely stimulates production rates but the magnitude of nutrient and geomorphological effects on rates of production is unknown. Will changes in benthic algal productivity affect algal-bacterial coupling? Furthermore, how is algal-bacterial coupling affected by geomorphological changes, which may be exacerbated by excess nutrient loading but can also occur in pristine marshes? This project will take advantage of the infrastructure of the TIDE project, a long-term saltmarsh eutrophication experiment at the Plum Island Ecosystem - Long Term Ecological Research site in Northeastern Massachusetts. Specifically, the PIs will measure benthic metabolism and examine algal- bacterial coupling in fertilized and ambient nutrient tidal creeks in the first field season. The following field season, they will compare sediment metabolism and carbon dynamics on slumped tidal creek walls (i.e. areas where low marsh has collapsed into the tidal creek) to that on the bottom of tidal creeks. In both years, gross and net production will be determined using an innovative triple oxygen isotope technique and traditional dissolved oxygen and inorganic carbon flux measurements. Comparisons between these methods will be useful in informing studies of sediment metabolism. Lipid biomarkers will be used to characterize the sources of organic matter to creek sediments, and stable isotope analysis of bacterial specific biomarkers to identify the sources of organic carbon utilized by sediment bacteria. The biomarkers will reveal whether sediment bacteria use organic matter substrates, such as benthic microalgal carbon, selectively or in proportion to availability. Overall, results from the proposed study will provide important information about how sediment carbon dynamics in shallow tidal creeks respond to long term eutrophication. Furthermore, findings will enhance understanding of the role of tidal creeks in coastal biogeochemistry.6:["$","$L19",null,{"dataset":{"_id":"827427","description":"

Bulk soil and elemental properties of marsh and infilled pond soils within Plum Island Ecosystems - LTER. Bulk soil properties of the soils are complemented with Fourier Transform Infrared Spectroscopy and ramped pyrolysis oxidation measurements of the soils. Data were collected during 2014-2015.

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BCO-DMO Processing:
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\n","bcodmoProcessing":"","title":"Ramped pyrolysis oxidation (RPO) temperature and carbon dioxide evolved values of soils collected in 2014-2015 within Plum Island Ecosystems LTER","nickname":"RPO Fast Ramps","dataUrl":"","currentState":"Final no updates expected","currentStateId":"7","validated":true,"restricted":false,"version":"1","version_date":"2020-10-21T04:00:00.000Z","abstract":"Ramped pyrolysis oxidation (RPO) temperature and carbon dioxide evolved values of soils at Plum Island Ecosystems - LTER. Data were collected 2014-2015.","citation":"Spivak, A. (2020) Ramped pyrolysis oxidation (RPO) temperature and carbon dioxide evolved values of soils collected in 2014-2015 within Plum Island Ecosystems LTER. Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 1) Version Date 2020-10-21 [if applicable, indicate subset used]. doi:10.26008/1912/bco-dmo.827427.1 [access date]","citationParts":{"identifier":"doi:10.26008/1912/bco-dmo.827427.1","versionDate":"2020-10-21","versionId":"1","year":"2020","title":"Ramped pyrolysis oxidation (RPO) temperature and carbon dioxide evolved values of soils collected in 2014-2015 within Plum Island Ecosystems LTER","authors":"Spivak, A.","publisher":"Biological and Chemical Oceanography Data Management Office (BCO-DMO)."},"doi":"10.26008/1912/bco-dmo.827427.1","release_date":null,"field_dataset_location":"","temporal_extent":{"start":"2014-07-01T04:00:00.000Z","end":"2015-12-31T05:00:00.000Z"},"temporal":{"resolution":"time:unitMonth","type":"time:Interval","start":{"value":"1404187200","label":"2014-07"},"end":{"value":"1451538000","label":"2015-12"}},"spatial_extent":{"shape":"polygon","center":{"latitude":42.739376903927,"longitude":-70.838600760356},"wkt":"POLYGON ((-70.84720027 42.73739991, -70.83000142 42.73739991, -70.83000142 42.741354, -70.84720027 42.741354, -70.84720027 42.73739991))","north":42.741354,"east":-70.83000142,"south":42.73739991,"west":-70.84720027},"dataset_type":["Other Field Results"],"keywords":["oceans"],"data_files":[{"id":"903121","title":"RPO_fast.csv","url":"https://datadocs.bco-dmo.org/dataset/827427/file/4WW2j4EhljA8xy/RPO_fast.csv","showTableUrl":"https://www.bco-dmo.org/dataset/827427/data/view/903121","description":"Primary data file for dataset ID 827427","filename":"RPO_fast.csv","bytesize":2963180,"checksum":{"value":"6aae8d6820e27305d1c5cdd8cfb1b1f7","Algorithm":{"_id":"190","name":"MD5"}},"mimetype":"text/csv","fileType":{"_id":"192","name":"Comma Separated Values (.csv)"},"isErddap":"","date":"","isPublicDuringEmbargo":false,"primaryDataFile":true,"showTable":true,"restricted":false}],"supplemental_files":[],"roles":[{"role":{"_id":"138","name":"Principal Investigator"},"performedBy":{"_id":"529580","name":"Amanda Spivak"},"performedAtOrganization":{"_id":"2","name":"Woods Hole Oceanographic Institution"}},{"role":{"_id":"133","name":"Contact"},"performedBy":{"_id":"827302","name":"Sheron Luk"},"performedAtOrganization":{"_id":"2","name":"Woods Hole Oceanographic Institution"}},{"role":{"_id":"145","name":"BCO-DMO Data Manager"},"performedBy":{"_id":"51498","name":"Shannon Rauch"},"performedAtOrganization":{"_id":"191","name":"Woods Hole Oceanographic Institution"}}],"deployments":[],"funding":[{"_id":"529582","name":"OCE-1233678","fundingSource":{"_id":"355","name":"NSF Division of Ocean Sciences"},"url":"https://www.nsf.gov/awardsearch/show-award?AWD_ID=1233678"}],"instruments":[{"_id":"827437","name":"infrared gas analyzer","description":"The evolved carbon dioxide (CO2) was measured by a flow-through infrared gas analyzer.","type_id":"720","type_name":"Gas Analyzer","type_desc":"Gas Analyzers - Instruments for determining the qualitative and quantitative composition of gas mixtures.","type_acronym":"Gas Analyzer"},{"_id":"827436","name":"Retsch Mixer Mill 200","description":"Retsch Mixer Mill 200 was used for homogenization.","type_id":"522984","type_name":"Homogenizer","type_desc":"A homogenizer is a piece of laboratory equipment used for the homogenization of various types of material, such as tissue, plant, food, soil, and many others.","type_acronym":"Homogenizer "}],"parameters":[{"_id":"827445","name":"Site","format":"","frictionlessType":"","description":"

Site number (1, 2, or 3); three high marsh sites were cored in PIE-LTER

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Sampling site identification.

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Core identifier (1 or 2); the two marsh cores were labeled 1 and 2

","units":{"_id":"","name":"unitless"},"type":{"_id":"785","name":"core_id","description":"

Core identification number or label; often used with ice, rock, sediment, or coral cores.

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Location within each site (MARSH or POND); at each of the three sites, two high marsh cores and one inundated pond core were collected

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Sampling site identification.

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Depth of horizon relative to surface of the marsh

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depth in core; mid-point of interval sampled

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Time during ramped pyrolysis oxidation experiment; format: hh:mm:ss AM/PM

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Time GMT defined as HHMM; time of day; generally reported in GMT as HHMM (hours and minutes) but may also be HH.H (decimal hours) or HHMMSS (hours; minutes and seconds); in EqPac time is reported as Hawaii local time

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Temperature of oven during ramped pyrolysis oxidation

","units":{"_id":"","name":"degrees Celsius"},"type":{"_id":"553763","name":"temperature","description":"

Temperature in degrees C of a sample or other item. A generic temperature measurement.

Note: This is NOT water temp or sea surface temp

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Carbon dioxide evolved

","units":{"_id":"","name":"per mil"},"type":{"_id":"827442","name":"CO2","description":"

Carbon dioxide: A one-carbon compound with formula CO2 in which the carbon is attached to each oxygen atom by a double bond. A colourless, odourless gas under normal conditions, it is produced during respiration by all animals, fungi, and microorganisms that depend directly or indirectly on living or decaying plants for food.

"}}],"related_publications":[{"id":"827376","citation":"Hemingway, J. D., Galy, V. V., Gagnon, A. R., Grant, K. E., Rosengard, S. Z., Soulet, G., … McNichol, A. P. (2017). Assessing the Blank Carbon Contribution, Isotope Mass Balance, and Kinetic Isotope Fractionation of the Ramped Pyrolysis/Oxidation Instrument at NOSAMS. Radiocarbon, 59(1), 179–193. doi:10.1017/rdc.2017.3\r\n","relation_type":["Methods"],"relation_desc":""},{"id":"740026","citation":"Spivak, A. C., Gosselin, K. M., & Sylva, S. P. (2018). Shallow ponds are biogeochemically distinct habitats in salt marsh ecosystems. Limnology and Oceanography. doi:10.1002/lno.10797\r\n","relation_type":["Methods"],"relation_desc":""},{"id":"828751","citation":"Spivak, A. C., Gosselin, K., Howard, E., Mariotti, G., Forbrich, I., Stanley, R., & Sylva, S. P. (2017). Shallow ponds are heterogeneous habitats within a temperate salt marsh ecosystem. Journal of Geophysical Research: Biogeosciences, 122(6), 1371–1384. doi:10.1002/2017jg003780\r\n","relation_type":["Methods"],"relation_desc":""}],"related_datasets":[],"services":[{"grouping":"","items":[{"name":"View Data","description":"An in-browser view of the primary tabular data file","url":"https://www.bco-dmo.org/dataset/827427/data/view","contentType":"text/html","actionType":"view"}]},{"grouping":"Metadata","items":[{"name":"HTML","description":"A simple HTML page of the dataset metadata","url":"https://www.bco-dmo.org/dataset/827427/description","contentType":"text/html","actionType":"view"},{"name":"PDF","description":"A PDF of the HTML dataset metadata","url":"https://www.bco-dmo.org/dataset/827427/Dataset_description.pdf","contentType":"application/pdf","actionType":"download"},{"name":"ISO 19115-2 (NOAA Profile)","description":"","url":"https://www.bco-dmo.org/dataset/827427/iso","contentType":"application/xml","actionType":"download"}]}],"programs":[],"projects":[{"_id":"529583","name":"Eutrophication Effects on Sediment Metabolism and Benthic Algal-bacterial Coupling: An Application of Novel Techniques in a LTER Estuary","acronym":"Benthic_PP_at_TIDE","description":"$1b"}],"archives":[{"id_value":"10.26008/1912/bco-dmo.827427.1","url":"https://doi.org/10.26008/1912/bco-dmo.827427.1","date_assigned":"2020-11-12","version_date":"2020-10-21","archiver":"Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA)","archiver_id":"272"}],"license":{"name":"Creative Commons Attribution 4.0","id":"CC-BY-4.0","uri":"https://creativecommons.org/licenses/by/4.0/","spdxUri":"https://spdx.org/licenses/CC-BY-4.0"},"metrics":{"views":{"count":110},"downloads":{"count":423}}}}]