Tidal marsh soils were sampled at low tide along 12 transects along the Skeena River estuary south of Port Edward, British Columbia, in 2014 and 2017. Eight of the transects were on the northeast side of the channel; four were on the southwest side. Sampling locations were stratified according to vegetation type. Usually three pits were excavated to 1 m depth on each transect, with one pit in each of the distinct vegetation zones. Bulk samples were collected from each distinct soil horizon, or where horizons were not clearly differentiated, at 25 cm depth intervals. Core samples of fixed volume were also collected from the same excavations for bulk density determination. Chemical analyses consisted of total C concentration (equivalent to organic C for these non-calcareous materials), total N, pH, and electrical conductivity (a measure of salinity).
| Start date | End date |
|---|---|
| 2014 | 2017 |
| Rank name | Value |
|---|---|
| Species | Potentilla anserina |
| Species | Carex lyngbyei |
| Species | Deschampsia cespitosa |
| Species | Festuca rubra |
| Species | Glaux maritima |
| Species | Plantago maritima |
| Species | Plantago macrocarpa |
| Species | Triglochin maritima |
| Species | Angelica lucida |
| Species | Conioselinum gmelinii |
| Species | Ligusticum hultenii |
| Species | Scirpus microcarpus |
| Species | Symphyotrichum subspicatum |
| Species | Castilleja hyetophila |
| Species | Hordeum brachyantherum |
| Species | Lathyrus palustris |
| Species | Lupinus nootkatensis |
| Species | Maianthemum dilatatum |
| Species | Stellaria humifusa |
| Species | Juncus arcticus |
| Species | Bromus pacificus |
| Species | Oenanthe sarmentosa |
| Species | Galium trifidum |
| Species | Trientalis arctica |
| Species | Carex pluriflora |
| Species | Rumex occidentalis |
| Species | Achillea millefolium |
| Species | Fritillaria camschatcensis |
| 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. | soil pit = A pit is dug from the surface of the soil to the underlying bedrock |
| 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_sample_volume | Sample volume used for bulk density measurements, if held constant. | cubicCentimeter |
| 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_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_method | Indicate whether vegetation_class was determined using a field observation or a measurement | field observation = Vegetation inferred by field observation |
| vegetation_notes | Any relevant submitter generated notes on how vegetation_class and dominant_species were determined. | |
| inundation_class | Code based on submitter field observation or measurement indicating how often the coring location is inundated. | high = Study-specific definition of an elevation relatively high in the tidal frame, typically defined by vegetation type mid = Study-specific definition of an elevation in the relative middle of the tidal frame, typically defined by vegetation type low = Study-specific definition of an elevation in relatively low in the tidal frame, typically defined by vegetation type |
| inundation_method | Indicate whether inundation_class was determined using a field observation or a measurement | field observation = Inundation inferred by field observation such as vegetation |
| inundation_notes | Any relevant submitter generated notes on how inundation was determined |
| 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. | handheld = Conventional Commercially available hand-held GPS |
| vegetation_method | Indicate whether vegetation_class was determined using a field observation or a measurement | field observation = Vegetation inferred by field observation |
| vegetation_notes | Any relevant submitter generated notes on how vegetation_class and dominant_species were determined. | |
| inundation_class | Code based on submitter field observation or measurement indicating how often the coring location is inundated. | high = Study-specific definition of an elevation relatively high in the tidal frame, typically defined by vegetation type mid = Study-specific definition of an elevation in the relative middle of the tidal frame, typically defined by vegetation type low = Study-specific definition of an elevation in relatively low in the tidal frame, typically defined by vegetation type |
| inundation_method | Indicate whether inundation_class was determined using a field observation or a measurement | field observation = Inundation inferred by field observation such as vegetation |
| inundation_notes | Any relevant submitter generated notes on how inundation was determined | |
| pH | pH of the pore water | dimensionless |
| pH_notes | Any additional notes relevant to pH | |
| carbon_stock | Calculated sediment carbon stocks from CHN or LOI data | kilogramsPerSquareMeter |
| carbon_stock_method | Carbon method used to calculate down-core stocks | EA = Each sample presented was measured using Elemental Analysis |
| carbon_stock_0.5m | Calculated total carbon stocks in the top 0.5 meter of sediment | kilogramsPerSquareMeter |
| carbon_stock_0.1m | Calculated total carbon stocks in the top meter of sediment. If the core was <1 m deep, we make the assumption that the carbon below the sampled depth is equivalent to the average carbon within the sampled depth range. If the core was >1 m deep, we just sum the stocks values in the top 1 m. | kilogramsPerSquareMeter |
| 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_carbon_measured | Measured mass of carbon relative to sample dry mass. | dimensionless |
| fraction_carbon_modeled | Modeled mass of carbon relative to sample dry mass. | dimensionless |
| fraction_nitrogen | Reported fraction of nitrogen in sample by elemental analysis. | dimensionless |
| C_to_N_ratio | Calculated carbon-to-nitrogen ratio in the soil sample | dimensionless |
| carbon_stock | Calculated sediment carbon stocks from CHN or LOI data | kilogramsPerSquareMeter |
| carbon_density | Reported carbon density from the publication (usually because the publication used a CHN analyzer, not LOI, to compute C abundance) | gramsPerCubicCentimeter |
| depth_interval_notes | Any other submitter generated notes specific to the depth interval. |
| 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/