Citation:

PANGAEA.947704 (DOI registration in progress)

Name: Seagrass blue carbon stocks in the German Baltic Sea
Published: 2022
License: https://creativecommons.org/licenses/by/4.0/
Keywords: carbon dioxide removal; Climate change; nature-based solutions; organic carbon; sediment core data; Zostera marina

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Abstract:

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).

Keyword(s):

carbon dioxide removal; Climate change; nature-based solutions; organic carbon; sediment core data; Zostera marina

Supplement to:

Stevenson, Angela; O Corcora, Tadhg; Hukriede, Wolfgang; Schubert, P R; Reusch, Thorsten B H (2023): Substantial seagrass blue carbon pools in the southwestern Baltic Sea include relics of terrestrial peatlands. Frontiers in Marine Science, 10, 1266663, https://doi.org/10.3389/fmars.2023.1266663

Funding:

Federal Ministry of Education and Research (BMBF), grant/award no. 03F0859B : Seastore

Helmholtz Association of German Research Centres (HGF), grant/award no. HI-CAM : Helmholtz-Climate-Initiative

Coverage:

Median Latitude: 54.443508 * Median Longitude: 10.812671 * South-bound Latitude: 53.995140 * West-bound Longitude: 9.519709 * North-bound Latitude: 54.839827 * East-bound Longitude: 13.753084

Date/Time Start: 2019-09-11T00:00:00 * Date/Time End: 2020-11-24T00:00:00

Minimum DEPTH, water: 0.8 m * Maximum DEPTH, water: 4.6 m

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Comment
1	Sample code/label	Sample label		Stevenson, Angela
2	DATE/TIME	Date/Time		Stevenson, Angela	Geocode
3	Location	Location		Stevenson, Angela
4	LATITUDE	Latitude		Stevenson, Angela	Geocode
5	LONGITUDE	Longitude		Stevenson, Angela	Geocode
6	Velocity magnitude	Vel mag	m/s	Stevenson, Angela	average MOV (Maximum Orbital Velocity) by depth
7	Velocity magnitude	Vel mag	m/s	Stevenson, Angela	maximum MOV by depth
8	Temperature, water	Temp	°C	Stevenson, Angela
9	Vegetation, cover	Veg cov		Stevenson, Angela
10	DEPTH, water	Depth water	m	Stevenson, Angela	Geocode
11	Core	Core		Stevenson, Angela
12	Core section number	Section	#	Stevenson, Angela	always top to bottom, e.g. 1 = uppermost section
13	Section position	Sect	cm	Stevenson, Angela	height of section with compression correction factor
14	Volume	Vol	cm³	Stevenson, Angela
15	Mass	Mass	g	Stevenson, Angela	weight of visible organic carbon in grams per core section
16	Mass	Mass	g	Stevenson, Angela	weight of dry sediments in grams, without visible organics
17	Density	Density	g/cm³	Stevenson, Angela
18	Mass per area	Mass	g/cm²	Stevenson, Angela	density_gcm3 x height_corrected
19	Core length	Core length	cm	Stevenson, Angela
20	Fraction	Frac	%	Stevenson, Angela	fine sediment fraction (<63 um) measured for 5-10 cm layer of core
21	Canopy	Canopy		Stevenson, Angela	seagrass canopy height
22	Shoot density	Shoot den	#/m²	Stevenson, Angela	seagrass shoots per square meter, using a planting frame 20 x 20 cm in size
23	Complexity	Complexity		Stevenson, Angela	seagrass complexity, vertical meters of seagrass per unit area
24	Carbon, organic, particulate	POC	%	Stevenson, Angela
25	Carbon, organic, particulate per area, fraction	POC frac	g/m²	Stevenson, Angela	weight (g) of POC per core section
26	Mass	Mass	g	Stevenson, Angela	weight (g) of POC summed across entire core, 'g_per_cm2' multiplied by '%POC'/100
27	Mass	Mass	g	Stevenson, Angela	grams POC per m2 integrated to 25 cm sediment depth; standardizing to 25 cm to make values comparable between sites and to other studies
28	Mass	Mass	g	Stevenson, Angela	grams visible organics per m2 integrated to 25 cm core length; standardizing to 25 cm to make values comparable between sites and to other studies
29	Ratio	Ratio		Stevenson, Angela	proportion of visible organics to POC (from TOC measurements) for entire core
30	Ratio	Ratio		Stevenson, Angela	grams of total organic carbon (POC + visible organics) per section
31	Ratio	Ratio		Stevenson, Angela	total organic carbon per core; all sections 'amt_C_per_sec' summed across entire core to determine total organic carbon across the whole core length
32	Ratio	Ratio		Stevenson, Angela	'core_C_g_per_m2' integrated to 25 cm sediment depth, standardizing to 25 cm to make values comparable between sites and to other studies
33	δ15N	δ15N	‰	Stevenson, Angela	d15N stable isotope signatures
34	δ13C	δ13C	‰ PDB	Stevenson, Angela	d13C stable isotope signatures

License:

Creative Commons Attribution 4.0 International (CC-BY-4.0)

Status:

Curation Level: Enhanced curation (CurationLevelC)

Size:

15248 data points

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