Nutrient release and flux dynamics of CO2, CH4, and N2O in a coastal peatland driven by actively induced rewetting with brackish water from the Baltic Sea

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Abstract 2) and nitrous oxide (N2 O). However, rewetting may lead to short-term nutrient leaching into adjacent water and high methane (CH4) emissions. The consequences of rewetting with brackish water on nutrient and greenhouse gas (GHG) fluxes remain unclear, although beneficial effects such as lower CH4 emissions seem likely. Therefore, we studied the actively induced rewetting of a coastal peatland with brackish water, by comparing pre- and post-rewetting data from the peatland and the adjacent bay. 2, CH4, and N2 O) accompanying the change from drained to inundated conditions were analyzed based on measurements of the surface water concentrations of nutrients (dissolved inorganic nitrogen, DIN, and phosphate, PO4 3 -), oxygen (O2), components of the CO2 system, CH4, and N2 O together with manual closed-chamber measurements of GHG fluxes. ± ± - 1 ± - 1 4 -P, depending on the endmember (bay vs. reference station). 4 emissions, as reported for freshwater rewetting, did not occur. CO2 fluxes (mean ± ± - 2 - 1 ± - 2 - 1 2 production. Pre-rewetting CH4 fluxes ranged from 0.13 ± - 2 - 1 ± - 2 - 1 4 fluxes on the formerly dry land increased by 1 order of magnitude (1.74 ± - 2 - 1 ± - 2 - 1 4 fluxes can likely be attributed to the suppression of methanogenesis and oxidation of CH4 by the available O2 and sulfate in the rewetted peatland, which serve as alternative electron acceptors. The post-rewetting N2 O flux was low, with an annual mean of 0.02 ± - 2 - 1 4 emissions.

Location: Deutsche Nationalbibliothek Frankfurt am Main

Extent: Online-Ressource

Language: Englisch

Bibliographic citation: Nutrient release and flux dynamics of CO₂, CH₄, and N₂O in a coastal peatland driven by actively induced rewetting with brackish water from the Baltic Sea ; volume:20 ; number:2 ; year:2023 ; pages:295-323 ; extent:29
Biogeosciences ; 20, Heft 2 (2023), 295-323 (gesamt 29)

Creator: Pönisch, Daniel Lars
Breznikar, Anne Elisabeth Edith
Gutekunst, Cordula N.
Jurasinski, Gerald
Voß, Maren
Rehder, Gregor

DOI: 10.5194/bg-20-295-2023

URN: urn:nbn:de:101:1-2023033008190729643452

Rights: Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.

Last update: 14.08.2025, 10:55 AM CEST

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