Citation:

PANGAEA.982732

Name: Soil organic carbon stocks of German salt marshes: a comparative study along Baltic Sea and North Sea
Published: 2025-06-12
License: https://creativecommons.org/licenses/by/4.0/
Keywords: Baltic Sea; blue carbon; carbon stocks; grazing; North Sea; Salt marshes; succession

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Published: 2025-06-12 • DOI registered: 2025-06-12

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Abstract:

In order to assess the differences in soil organic carbon (SOC) stocks between contrasting geomorphological settings of salt marshes in Germany, three distinct salt marsh types were sampled: Baltic Sea salt marshes, North Sea mainland salt marshes and North Sea island salt marshes. 14 study sites were sampled between 2021 and 2022 covering gradients of different plant communities and management types. The sampled transects of the North Sea salt marshes spanned all three vegetation zones: pioneer zone, low marsh, and high marsh. In each of the 14 study sites, 8-12 plots were assessed. For the quantification of SOC content, soil bulk density and SOC δ13C signature, a single 1-m soil core was taken from each plot. An Eijkelkamp peat sampler was used for taking soil cores. Dry soil bulk density was calculated from sample dry weight and volume. Prior to elemental and isotope analysis, macroscopic root residues were removed and soil samples were acidified.

Keyword(s):

Baltic Sea; blue carbon; carbon stocks; grazing; North Sea; Salt marshes; succession

Supplement to:

Logemann, Ella; Gösele, Clarisse; Jensen, Kai; Mueller, Peter (2025): Soil Organic Carbon Stocks of German Salt Marshes: A Comparative Study Along Low‐ and High‐Energy Coastlines. Journal of Geophysical Research: Biogeosciences, 130(7), e2025JG008797, https://doi.org/10.1029/2025JG008797

Related to:

Logemann, Ella; Gösele, Clarisse; Hosbach, Hannah; Nicol, Kathryn; Jensen, Kai; Müller, Peter (2025): Grazing effects on soil organic carbon stocks of German salt marshes along the Baltic Sea and North Sea coast [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.982734

Project(s):

DAM CDRmare - sea4soCiety: Searching for solutions for Carbon-sequestration in coastal ecosystems (sea4soCiety)

Research Mission of the German Marine Research Alliance (DAM): Marine carbon sinks in decarbonisation pathways (CDRmare)

Funding:

Federal Ministry of Education and Research (BMBF), grant/award no. 03F0896F : DAM CDRmare - sea4soCiety, University of Hamburg

Coverage:

Median Latitude: 54.114413 * Median Longitude: 9.057612 * South-bound Latitude: 53.436601 * West-bound Longitude: 7.129025 * North-bound Latitude: 55.040816 * East-bound Longitude: 13.777219

Date/Time Start: 2021-11-08T00:00:00 * Date/Time End: 2022-09-08T00:00:00

Minimum DEPTH, soil: 0.050 m * Maximum DEPTH, soil: 0.950 m

Event(s):

GER_Ba_SM_P1_SC * Latitude: 53.720153 * Longitude: 7.414107 * Date/Time: 2022-08-11T00:00:00 * Campaign: * Basis: Sampling on land * Method/Device: Peat corer (PEATC)

GER_Ba_SM_P2_SC * Latitude: 53.720816 * Longitude: 7.400989 * Date/Time: 2022-08-11T00:00:00 * Campaign: * Basis: Sampling on land * Method/Device: Peat corer (PEATC)

GER_Ba_SM_P3_SC * Latitude: 53.721243 * Longitude: 7.400660 * Date/Time: 2022-08-11T00:00:00 * Campaign: * Basis: Sampling on land * Method/Device: Peat corer (PEATC)

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	Event label	Event		Logemann, Ella
2	Sample code/label	Sample label		Logemann, Ella		Unique identifier for each sample
3	LATITUDE	Latitude		Logemann, Ella		Geocode
4	LONGITUDE	Longitude		Logemann, Ella		Geocode
5	DATE/TIME	Date/Time		Logemann, Ella		Geocode – Date
6	Site	Site		Logemann, Ella		Geographic location
7	Type	Type		Logemann, Ella		Classification of the salt marsh (e.g., Baltic Sea, North Sea mainland, North Sea island)
8	Ecosystem	Ecosystem		Logemann, Ella		Type of ecosystem
9	Zone	Zone		Logemann, Ella		Specific zone within the salt marsh (only applies to North Sea salt marshes)
10	Plot	Plot		Logemann, Ella		Identifier for the sampling plot
11	Management	Management		Logemann, Ella		Description of management practices (grazed or non-grazed)
12	Depth comment	Depth comm		Logemann, Ella		Depth range in cm of the collected soil sample
13	Depth, soil, minimum	Depth soil min	m	Logemann, Ella
14	Depth, soil, maximum	Depth soil max	m	Logemann, Ella
15	DEPTH, soil	Depth soil	m	Logemann, Ella		Geocode – Mean
16	Carbon, organic, soil	SOC	%	Logemann, Ella	Elemental analyzer, EuroVector, EA 3000	Percentage of soil organic carbon in the sample
17	δ13C, organic carbon	δ13C Corg	‰ PDB	Logemann, Ella	Isotope ratio mass spectrometer (IRMS), Nu Instruments, Horizon	Stable carbon isotope signature of the soil organic carbon
18	Validation flag/comment	Flag comm		Logemann, Ella	Elemental analyzer, EuroVector, EA 3000	Technical validation of carbon values ; when missing values were interpolated
19	Density, dry bulk	DBD	g/cm³	Logemann, Ella	Calculated	Density of the soil
20	Density, organic carbon	Corg dens	g/cm³	Logemann, Ella	Calculated	Density of soil organic carbon
21	Soil water content	SWC	%	Logemann, Ella	Calculated	Water content in the soil sample
22	pH	pH		Logemann, Ella	pH meter, WTW, inoLab Multi 9310 IDS	Soil pH measurement
23	Conductivity	Cond	mS/cm	Logemann, Ella	Conductivity meter, WTW, inoLab Cond 7310	Electrical conductivity, soil
24	Size fraction > 0.063 mm, sand	>63 µm	%	Müller, Peter	Calculated	Percentage of sand in the soil
25	Depth, description	Depth desc		Logemann, Ella		Description of stratification of soil organic carbon in the soil core
26	Bare soil, cover	Bare soil cov	%	Logemann, Ella	Visual estimation	Proportion of soil surface without vegetation within 1 m² plot
27	Litter, cover	Lit cov	%	Logemann, Ella	Visual estimation	Percentage of litter cover within 1 m² plot
28	Plant, species richness	Plant S	#	Logemann, Ella	Counting	Count of different plant species identified within 1 m² plot
29	Plant height	Plant h	cm	Logemann, Ella	Calculated	Average height of vegetation within 1 m² plot

License:

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

Status:

Curation Level: Enhanced curation (CurationLevelC)

Size:

30700 data points

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