Sediment cores were collected in at the St. Jones and Blackbird Creek Reserves in Delaware between 2017-2019 with the goal of measuring organic matter, sediment carbon, and dry bulk density. These data were used to assess the variability, mean, and range of carbon densities within two Delaware tidal marshes. An analysis of these data are available in the Journal of Coastal Conservation (St.Laurent et al, 2020).
| Start date | End date |
|---|---|
| 2017 | 2019 |
| Rank name | Value |
|---|---|
| Species | Spartina alterniflora |
| Species | Phragmites australis |
| Species | Spatina cyanosuriodes |
| Species | Distichlis spicata |
| Species | Spartina patens |
| Species | Scirpus spp |
| Species | Atriplex patula |
| Species | Polygonum punctatum |
| Species | Schoenoplectus pungens |
| Species | Schoenoplectus tabernaemontani |
| Species | Amaranthus cannabinus |
| Species | Zizania aquatica |
| Species | Pontederia cordata |
| attribute name | definition | format, unit or codes |
|---|---|---|
| study_id | Unique identifier for the study made up of the first author's family name, as well as the second author's or 'et al.' if more than three, then publication year spearated by underscores. See worksCited.bib for more detail. | |
| coring_method | Code indicating what type of device was used to collect soil depth profiles. | pvc and hammer = PVC pipe was driven into the sediment with a hammer to recover a core |
| roots_flag | Code indicating whether live roots were included or excluded from carbon assessments. | roots and rhizomes separated = Roots and rhizomes were separated from soil before dry bulk density and or organic matter and carbon measurements. |
| sediment_sieved_flag | Code indicating whether or not sediment was sieved prior to carbon measurements. | sediment sieved = Sediment was sieved prior to analysis for organics |
| sediment_sieve_size | If sediment was sieved, the size of sieve used. | millimeter |
| compaction_flag | Code indicating how the authors qualified or quantified compaction of the core. | compaction qualified = Compaction was at least qualified and noted by the authors |
| dry_bulk_density_temperature | Temperature at which samples were dried to measure dry bulk density. This can include either samples that were freeze dried or oven dried. | celsius |
| dry_bulk_density_time | Time over which samples were dried to measure dry bulk density. | hour |
| dry_bulk_density_sample_volume | Sample volume used for bulk density measurements, if held constant. | cubicCentimeter |
| dry_bulk_density_flag | Any notable codes regarding how the authors quantified dry bulk density. | time approximate = Bulk density time recorded herin is an approximate estimate |
| loss_on_ignition_temperature | Temperature at which samples were combusted to estimate fraction organic matter. | celsius |
| loss_on_ignition_time | Time over which samples were combusted to estimate fraction organic matter. | hour |
| carbonates_removed | Whether or not carbonates were removed prior to calculating fraction organic carbon. | FALSE = Carbonates were not removed before measuring organic carbon |
| fraction_carbon_method | Code indicating the method for which fraction carbon was measured or modeled (Note: regression based models are permitted, but the use of the Bemmelen factor [0.58 gOC gOM-1] is discouraged). | Holmquist regression = Used regression model from Holmquist et al., 2018, Scientific Reports, to predict fraction carbon as a function of fraction organic matter |
| fraction_carbon_type | Code indicating whether fraction_carbon refers to organic or total carbon. | organic carbon = Author specified that fraction carbon measurements were of organic carbon |
| attribute name | definition | format, unit or codes |
|---|---|---|
| study_id | Unique identifier for the study made up of the first author's family name, as well as the second author's or 'et al.' if more than three, then publication year spearated by underscores. See worksCited.bib for more detail. | |
| site_id | Site identification code unique to each study. | |
| core_id | Core identification code unique to each site. | |
| core_year | Year of core collection | nominalYear |
| core_latitude | Positional latitude of the core in decimal degree WGS84. | degree |
| core_longitude | Positional longitude of the core in decimal degree WGS84. | degree |
| salinity_class | Code based on submitter field observation or measurement indicating average annual salinity (Note: Palustrine and freshwater should only include tidal wetlands, or wetlands that are potentially/formerly tidal but artificially freshened due to artificial tidal restrictions). | mixoeuhaline = 30-40 ppt polyhaline = 18-30 ppt mesohaline = 5-18 ppt oligohaline = 0.5-5 ppt. |
| salinity_method | Indicate whether salinity_class was determined using a field observation or a measurement | measurement = Salinity observed from local instrument. |
| salinity_notes | Any relevant submitter generated notes on how salinity_class was determined. | |
| vegetation_method | Indicate whether vegetation_class was determined using a field observation or a measurement | measurement = Vegetation measured by counts or plots. |
| vegetation_notes | Any relevant submitter generated notes on how vegetation_class and dominant_species were determined. | |
| core_length_flag | Indicated whether or not the coring team believes they recovered a full sediment profile, down to bedrock, or other non-marsh interface. | core depth limited by length of corer = The total depth of the core was limited by the length of the coring device |
| attribute name | definition | format, unit or codes |
|---|---|---|
| study_id | Unique identifier for the study made up of the first author's family name, as well as the second author's or 'et al.' if more than three, then publication year spearated by underscores. See worksCited.bib for more detail. | |
| site_id | Site identification code unique to each study. | |
| core_id | Core identification code unique to each site. | |
| depth_min | Minimum depth of a sampling increment. | centimeter |
| depth_max | Maximum depth of a sampling increment. | centimeter |
| sample_id | Sample identification unique to the core. This should be used in the case that there are relevant lab specific sample codes, or in the case that there are multiple replicate samples. | |
| dry_bulk_density | Dry mass per unit volume of a soil sample. This does not include ash free bulk density. | gramsPerCubicCentimeter |
| fraction_organic_matter | Mass of organic matter relative to sample dry mass. Ash free bulk density should not be used here but should be expressed as a loss on ignition fraction. | dimensionless |
| fraction_carbon_modeled | Modeled mass of carbon relative to sample dry mass. | dimensionless |
| fraction_carbonate | Mass of carbonate relative to sample dry mass. | dimensionless |
| fraction_nitrogen | Mass of nitrogen relative to sample dry mass. | dimensionless |
| fraction_carbon_measured | Measured mass of carbon relative to sample dry mass. | dimensionless |
| fraction_hydrogen | Mass of hydrogen relative to sample dry mass. | dimensionless |
| fraction_sulfur | Mass of sulfur relative to sample dry mass. | dimensionless |
| porewater_salinity | Porewater salinity measured in ppt at the core location. | dimensionless |
| unit name | parent SI unit | unit type | description |
|---|---|---|---|
| cubicCentimeter | cubicMeter | volume | cubic centimeter |
This dataset is listed under a Creative Commons BY 4.0 and can be used with attribution. https://creativecommons.org/licenses/by/4.0/