We determined soil carbon stocks in least-disturbed tidal marshes, seagrass meadows, and tidal forested wetlands comprising 28 sites in nine estuaries from Humboldt Bay, California to northern Washington. The dataset of 168 cores includes down-core bulk density and carbon content in subsamples from the top meter (or more) of the soil column. For each cored location, the data set also includes information on wetland surface elevation, pore water salinity, pore water pH, and dominant vegetation. This dataset accompanies the published paper Kauffman et al. (2020) in the journal Global Change Biology.
| Start date | End date |
|---|---|
| 2017 | 2018 |
| Rank name | Value |
|---|---|
| Species | Picea sitchensis |
| Species | Cornus sericea |
| Species | Polystichum munitum |
| Species | Acer circinatum |
| Species | Thuja plicata |
| Species | Rubus parviflorus |
| Species | Impatiens sp. |
| Species | Salix sitchensis |
| Species | Oenanthe sarmentosa |
| Species | Carex obnupta |
| Species | Carex lyngbyei |
| Species | Phalaris arundinacea |
| Species | Sparganium eurycarpum |
| Species | Lilaeopsis occidentalis |
| Species | Elodea canadensis |
| Species | Polygonum persicaria |
| Species | Eleocharis palustris |
| Species | Alnus rubra |
| Species | Lysichiton americanus |
| Species | Rosa sp. |
| Species | Athyrium filix-femina |
| Species | Gaultheria shallon |
| Species | Rubus spectabilis |
| Species | Zostera marina |
| Species | Agrostis stolonifera |
| Species | Jaumea carnosa |
| Species | Sarcocornia pacifica |
| Species | Triglochin maritima |
| Species | Distichlis spicata |
| Species | Juncus balticus |
| Species | Potentilla anserina |
| Species | Deschampsia cespitosa |
| Species | Nanozostera japonica |
| Species | Schoenoplectus pungens |
| Species | Schoenoplectus sp. |
| Species | Typha latifolia |
| Species | Grindelia integrifolia |
| 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. | gouge auger = A half cylinder coring device in which the coring section is open, not sealed off by a fin |
| roots_flag | Code indicating whether live roots were included or excluded from carbon assessments. | roots and rhizomes included = Roots and rhizomes were included in 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 not sieved = Sediment was not sieved prior to analysis for organics. |
| 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_flag | Any notable codes regarding how the authors quantified dry bulk density. | time approximate = Bulk density time recorded herin is an approximate estimate |
| carbon_measured_or_modeled | Code indicating whether fraction carbon was measured or estimated as a function of organic matter. | measured = Fraction carbon was measured as opposed to modeled |
| 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). | EA = Each sample presented was measured using Elemental Analysis |
| fraction_carbon_type | Code indicating whether fraction_carbon refers to organic or total carbon. | total carbon = Author specified that fraction carbon measurements were of total 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. | |
| site_description | Site description including relevant study details and political geographic units. Some of these descriptions can be automated by the ingestion code. | |
| vegetation_class | Code based on submitter field observations or measurement indicating dominant wetland vegetation type. | emergent = Describes wetlands dominated by persistent emergent vascular plants forested = Describes wetlands dominated by woody vegetation > 5 meters in height seagrass = Describes tidal or subtidal communities dominated by rooted vascular plants. |
| site_latitude_min | Minimum latitude defining a bounding box for the site in decimal degree WGS84. This can also be generated automatically by the ingestion code. | degree |
| site_latitude_max | Maximum latitude defining a bounding box for the site in decimal degree World Geodedic System of 1984 (WGS84). This can also be generated automatically by the ingestion code. | degree |
| site_longitude_min | Minimum longitude defining a bounding box for the site in decimal degree WGS84. This can also be generated automatically by the ingestion code. | degree |
| site_longitude_max | Maximum longitude defining a bounding box for the site in decimal degree WGS84. This can also be generated automatically by the ingestion code. | degree |
| 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 |
| core_position_method | Code indicating how latitude and longitude were determined. | RTK-GPS = Real-time kinematic global position system (GPS) handheld = Conventional Commercially available hand-held GPS other high resolution = Any other technique resulting in positional error < 1 meter |
| core_position_notes | Any relevant submitter generated notes on how latitude and longitude were determined. | |
| core_elevation | Surface elevation of the core relative to defined datum. | meter |
| core_elevation_datum | The datum relative to which the core elevation was measured against (For a complete list of datum names and aliases please refer to the ISO Geodedic Registry https://iso.registry.bespire.eu/register/geodetic/VerticalDatum). | NAVD88 = A gravity-based geodetic datum, North American Vertical Datum of 1988 |
| core_elevation_method | Code indicating how elevation was determined | RTK-GPS = Real-time kinematic global position system (GPS) other high resolution = Any other technique resulting in positional error < 5 cm of random error |
| core_elevation_notes | Any relevant submitter generated notes on how elevation was determined | |
| 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). | brine = >50 ppt saline = 30-50 ppt fresh = <0.5 ppt 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_class | Code based on submitter field observations or measurement indicating dominant wetland vegetation type. | emergent = Describes wetlands dominated by persistent emergent vascular plants forested = Describes wetlands dominated by woody vegetation > 5 meters in height seagrass = Describes tidal or subtidal communities dominated by rooted vascular plants. |
| peat_depth | Depth of peat at the sampling location. | centimeter |
| core_length | Maximum length of the core. | centimeter |
| porewater_salinity | Porewater salinity measured in ppt at the core location. | dimensionless |
| pH | pH measured in porewater at the core location. | dimensionless |
| peat_depth_notes | Any submitter defined notes on how peat depth was measured. |
| 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 |
| dry_bulk_density | Dry mass per unit volume of a soil sample. This does not include ash free bulk density. | gramsPerCubicCentimeter |
| fraction_carbon | Mass of carbon relative to sample dry mass. | dimensionless |
| depth_interval_notes | Any other submitter generated notes specific to the depth interval. | |
| representative_depth_min | Minimum representative depth of a sampling increment. | centimeter |
| representative_depth_max | Maximum representative depth of a sampling increment. | centimeter |
| unit name | parent SI unit | unit type | description |
|---|
This dataset is listed under a Creative Commons BY 4.0 and can be used with attribution. https://creativecommons.org/licenses/by/4.0/