Citation:

PANGAEA.993174 (dataset in review)

Name: Soil porewater chemistry survey of European peatlands
License: https://creativecommons.org/licenses/by/4.0/
Keywords: iron oxides; Phosphorus; Redox conditions; water quality

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Abstract:

Porewater and soil samples were collected from 64 natural and rewetted peatlands across Germany (47 sites), Poland (5), Estonia (6), Scotland (3), Sweden (2), and Georgia (1) between 1997 and 2017. A total of 812 anoxic porewater samples were taken from water-saturated soil layers (0–0.6 m depth) using dialysis samplers along 10–20 m transects (Hesslein, 1976). Selected fen sites were monitored for 10–20 years post-rewetting to assess seasonal and long-term nutrient dynamics. The peatlands varied in drainage history and land use intensity, resulting in different degrees of decomposition in the upper peat layers (0–0.4 m depth). The dialysis sampling technique enabled unbiased sampling of oxygen-sensitive dissolved solutes and provided vertical concentration profiles of porewater chemistry (Zak et al., 2004). The data were used to compare porewater composition between rewetted and natural peatlands (bogs and fens), (ii) evaluate the influence of peat characteristics on porewater chemistry in rewetted sites, (iii) examine seasonal variations in nutrient concentrations in rewetted fens, and (iv) assess long-term changes in porewater composition following rewetting.

Keyword(s):

iron oxides; Phosphorus; Redox conditions; water quality

Related to:

Krishnankutty, Nimisha; Gelbrecht, Jörg; Petersen, Rasmus Jes; Rayner, D; Lau, Maximilian P; Frank, Stefan; Andersen, Roxane; Pärn, Jaan; Mander, Ülo; Kotowski, Wiktor; Liu, Haojie; Iversen, Bo V.; Heckrath, Goswin; Hansen, Hans C B; Hoffmann, Carl C; Mäenpää, Maarit I; Goldhammer, Tobias; Kull, Ain; Florea, Adrian-Florin; Zak, Dominik (2025): A comprehensive porewater survey of European peatlands reveals sustained elevated phosphorus levels after 10–20 years of rewetting. Geoderma, 463, 117554, https://doi.org/10.1016/j.geoderma.2025.117554

References:

Hesslein, Raymond H (1976): An in situ sampler for close interval pore water studies1. Limnology and Oceanography, 21(6), 912-914, https://doi.org/10.4319/lo.1976.21.6.0912

Zak, Dominik; Gelbrecht, Jörg; Steinberg, Christian E W (2004): Phosphorus Retention at the Redox Interface of Peatlands Adjacent to Surface Waters in Northeast Germany. Biogeochemistry, 70(3), 357-368, https://doi.org/10.1007/s10533-003-0895-7

Funding:

Danmarks Frie Forskningsfond (DFF), grant/award no. 1127-00033B

Estonian Research Council, grant/award no. PRG2032: Restoration pathways to mitigate greenhouse gas emissions in drained peatlands (RestPeat)

European Commission (EC), grant/award no. 101079192 : Living Labs of Wetland Forest Research (LiWeFoR)

European Research Council (ERC), grant/award no. 101096403: N2O Budgets in Peatlands - from Processes to Ecosystem (Peatland N2O)

Leverhulme Trust, grant/award no. RL-2019-002: Developing a new understanding of blanket bog resilience from molecules to landscapes

Coverage:

Median Latitude: 53.815455 * Median Longitude: 14.359517 * South-bound Latitude: 41.863489 * West-bound Longitude: -3.959525 * North-bound Latitude: 59.669922 * East-bound Longitude: 41.801848

Date/Time Start: 1999-10-25T00:00:00 * Date/Time End: 2018-09-27T00:00:00

Event(s):

Peatland_NB1 * Latitude: 53.694648 * Longitude: 8.820813 * Location: Germany * Method/Device: Soil sample (SOILS)

Peatland_NB2 * Latitude: 53.899556 * Longitude: 9.924611 * Location: Germany * Method/Device: Soil sample (SOILS)

Peatland_NB3 * Latitude: 53.899750 * Longitude: 9.925417 * Location: Germany * Method/Device: Soil sample (SOILS)

Comment:

Further projects and funding:

* Ursachen und zeitlich Entwicklung der Phosphorfreisetzung und des Phosphorrūckhaltes in wiedervernässten Niedermooren (Beispielgebiet Peenetal bei Dargun), Award: Department of Environment of Mecklenburg-Vorpommern and the European Agricultural Guidance and Guarantee Fund (EAGGF)

* WETSCAPES2.0, Web: https://botanik.uni-greifswald.de/experimentelle-pflanzenoekologie/wetscapes2/, Award: Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) - Transregio Collaborative Research Centre 410

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	Event label	Event		Zak, Dominik
2	Latitude of event	Latitude		Zak, Dominik
3	Longitude of event	Longitude		Zak, Dominik
4	Location	Location		Zak, Dominik
5	Identification	ID		Zak, Dominik
6	Country	Country		Zak, Dominik
7	Climate zone	Climate zone		Zak, Dominik
8	Temperature, air, annual mean	MAAT	°C	Zak, Dominik
9	Precipitation, annual mean	MAP	mm	Zak, Dominik
10	Replicates	Repl	#	Zak, Dominik		Sample
11	DATE/TIME	Date/Time		Zak, Dominik		Geocode – Sampling Date
12	Peatland type	Peatland		Zak, Dominik
13	Peatland trophic status	Peatland status		Zak, Dominik
14	Material	Material		Zak, Dominik		Peat parent Material
15	Drainage type	Drainage		Zak, Dominik
16	Hydrology	Hydrology		Zak, Dominik
17	Year of rewetting	Rewetting	a AD	Zak, Dominik
18	Water table level, annual, minimum	Water table level (1-12) min	cm	Zak, Dominik
19	Water table level, annual, maximum	Water table level (1-12) max	cm	Zak, Dominik
20	Peat decomposition, surface	Peat decomp surf		Zak, Dominik
21	Phosphorus, reactive soluble	SRP	mg/l	Zak, Dominik
22	Nitrogen in ammonium	N-[NH4]+	mg/l	Zak, Dominik
23	Sulfate	[SO4]2-	mg/l	Zak, Dominik	Ion Chromatograph (IC), Thermo Scientific, Dionex DX 100
24	Carbon, organic, dissolved	DOC	mg/l	Zak, Dominik	Total organic analyzer (TOC 5000A Shimazdu)
25	Calcium	Ca	mg/l	Zak, Dominik
26	Iron, total	Fe tot	mg/l	Zak, Dominik
27	pH	pH		Zak, Dominik	pH meter, Weilheim, Multi Cal SenTix61
28	Conductivity, electrical	EC	µS/cm	Zak, Dominik
29	Potassium	K	mg/l	Zak, Dominik
30	Sodium	Na	mg/l	Zak, Dominik
31	Magnesium	Mg	mg/l	Zak, Dominik
32	Carbon, inorganic, dissolved	DIC	mg/l	Zak, Dominik
33	Nitrogen in nitrate	N-[NO3]-	mg/l	Zak, Dominik
34	Chloride	Cl-	mg/l	Zak, Dominik	Ion Chromatograph (IC), Thermo Scientific, Dionex DX 100
35	Manganese	Mn	mg/l	Zak, Dominik	Ion Chromatograph (IC), Thermo Scientific, Dionex DX 100

License:

Creative Commons Attribution 4.0 International (CC-BY-4.0) (License comes into effect after moratorium ends)

Status:

Curation Level: Enhanced curation (CurationLevelC)

Size:

20850 data points

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