PNBA - Mauritania sedimentary carbon and eDNA raw data

This dataset relates to the publication . It contains sediment properties relating to carbon content and granulometry, eDNA metabarcoding and radionuclides required for the analysis.

Dataset and variable description --------------------------------------------------------------------------------

 core-extraction.csv
Contains properties related to the sediment cores.

core_id - Unique identifier used for sediment cores

habitat - Habitat where core was sampled. One of "Sand" (bare sediment, no vegetation), "Cymodocea" (vegetated by Cymodocea nodosa) or "Zostera" (vegetated by Zostera noltei)

date - Sampling date (YYYY/MM/DD)

lat - Latitude of sampling site (decimal degrees, WGS84)

lon - Longitude of sampling site (decimal degrees, WGS84)

sampling_depth - Depth reached by core sampler (cm)

core_length - Length of sediment core, as measured in the lab after halving (cm)

compaction - Compaction factor of sediment core

loi-and-granulometry.csv
Contains results from loss on ignition and dry sieving, used to study organic matter contents and granulometry.

sample_id - Unique sample identifier. Created by concatenating core_id and the sample's middle depth

core_id - Identifies which core the sample was retrieved from

depth - Middle depth of the sample. All samples have a height of 2 cm. (cm)

depth_corr - Middle depth of the sample, corrected for compaction

volume - Sample volume (mL or cm3)

volume_corr - Sample volume, corrected for compaction (mL or cm3)

wet_sample - Wet sample weight (g)

dry_sample - Dry sample weight (g)

ground_sample - Weight of sample fraction used for loss on ignition (g)

burned_sample - Weight of sample fraction used for loss on ignition, after submitting it to burning (g)

water_content - Estimated water content of sample (fraction)

om_content - Estimated organic matter content of sample (fraction)

columns 90000-63000 μm to <1 μm - Weight of sediment particles with size within range described in column name (g)

mean_phi - Mean phi of sample (Krumbein phi, φ)

percent_gravel - Sediment fraction (in weight) classified as gravel (fraction)

percent_sand - Sediment fraction (in weight) classified as sand (fraction)

percent_mud - Sediment fraction (in weight) classified as mud(fraction)

radionuclides.csv
Contains the results from gamma-ray spectroscopy

core_id - Identifies which core the sample was retrieved from

sample_id - Unique sample identifier. Created by concatenating core_id and the sample's middle depth

depth - Middle depth of the sample. All samples have a height of 2 cm. (cm)

depth_corr - Middle depth of the sample, corrected for compaction

remaining columns - Element specific activity for element named in column (Bq/g). Columns with the suffix "_error" represent the measurement error (sigma = 2)