Seagrass blue carbon stocks in the German Baltic Sea


A total of 169 sediment cores (30 cm length; 5.5 cm inner diameter) were sampled in seagrass meadows (n = 110 cores) and nearby unvegetated sediments (n = 59 cores). Nine cores (with some exceptions) were collected at each site, from three sublocations: (1) in the high-density part of the meadow ("dense seagrass" hereafter), (2) low density or fringe of the meadow ("sparse seagrass" hereafter), and (3) adjacent unvegetated sediments at least 5 m from seagrass ("unvegetated"). Dense and sparse seagrass sublocations are collectively referred to as "seagrass-vegetated" sediments or sublocations. Sediment cores taken within the seagrass meadow were sampled at least 10 m apart from each other. Several biophysical parameters were collected alongside each core, including seawater depth, sediment grain size, current velocity at the seafloor, and seagrass complexity. The measure of "seagrass complexity" was defined as the product of seagrass canopy height and shoot density, to obtain the sum of leaf heights within a unit of area (in m/m2). Cores were collected between 1 and 5 m seawater depth manually via self-contained underwater breathing apparatus (SCUBA) divers pounding impact-resistant PVC tubes into the sediment with a rubber mallet. Sediment total Corg was determined using an Elemental Analyzer (EURO EA Elemental Analyzer).

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Metadata Access
Creator Stevenson, Angela; O Corcora, Tadhg; Hukriede, Wolfgang; Schubert, Philipp ORCID logo; Reusch, Thorsten B H ORCID logo
Publisher PANGAEA
Publication Year 2022
Funding Reference Federal Ministry of Education and Research Crossref Funder ID 03F0859B Seastore; Helmholtz Association of German Research Centres Crossref Funder ID HI-CAM Helmholtz-Climate-Initiative
Rights Creative Commons Attribution 4.0 International;
OpenAccess true
Resource Type Dataset
Format text/tab-separated-values
Size 15248 data points
Discipline Earth System Research
Spatial Coverage (9.520W, 53.995S, 13.753E, 54.840N)
Temporal Coverage Begin 2019-09-11T00:00:00Z
Temporal Coverage End 2020-11-24T00:00:00Z