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Nutrients Alter Met...
Nutrients Alter Methane Production and Oxidation in a Thawing Permafrost Mire
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- Kashi, N. Niloufar (författare)
- Earth Systems Research Center, Institute for the Study of Earth, Ocean, and Space, University of New Hampshire, NH, Durham, United States; Department of Earth Sciences, University of New Hampshire, NH, Durham, United States
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- Hobbie, Erik A. (författare)
- Earth Systems Research Center, Institute for the Study of Earth, Ocean, and Space, University of New Hampshire, NH, Durham, United States; Department of Earth Sciences, University of New Hampshire, NH, Durham, United States; Department of Natural Resources and the Environment, University of New Hampshire, NH, Durham, United States
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- Varner, Ruth K. (författare)
- Earth Systems Research Center, Institute for the Study of Earth, Ocean, and Space, University of New Hampshire, NH, Durham, United States; Department of Earth Sciences, University of New Hampshire, NH, Durham, United States
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- Wymore, Adam S. (författare)
- Department of Natural Resources and the Environment, University of New Hampshire, NH, Durham, United States
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- Ernakovich, Jessica G. (författare)
- Department of Natural Resources and the Environment, University of New Hampshire, NH, Durham, United States
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- Giesler, Reiner (författare)
- Umeå universitet,Institutionen för ekologi, miljö och geovetenskap
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(creator_code:org_t)
- 2022-04-14
- 2023
- Engelska.
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Ingår i: Ecosystems. - : Springer. - 1432-9840 .- 1435-0629. ; 26, s. 302-317
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Permafrost thaw releases nutrients and metals from previously frozen soils and these nutrients may affect important biogeochemical processes including methane (CH4) production and oxidation. Here we assessed how concentrations of nutrients, solutes, and metals varied across four plant communities undergoing permafrost thaw and if these geochemical characteristics affected rates of CH4 production and oxidation. We tested nutrient limitation in CH4 production and oxidation by experimentally adding nitrogen (N), phosphorus (P) and a permafrost leachate to peat across these four plant communities. The upper 20 cm of permafrost contained 715 ± 298 mg m−2 of extractable inorganic N and 20 ± 6 mg m−2 of resin-extractable phosphorus (Presin), for a N:P ratio of 36:1. These low amounts of Presin coincide with high acid-digestible aluminum (Al), iron (Fe), and P concentrations in the permafrost soil and suggest that P may accumulate via sorption and constrain easily available forms of P for plants and microbes. Permafrost leachate additions decreased potential CH4 production rates up to 80% and decreased CH4 oxidation rates by 66%, likely due to inhibitory effects of N in the permafrost. In contrast, organic and inorganic P additions increased CH4 oxidation rates up to 36% in the tall graminoid fen, a community where phosphate availability was low and CH4 production was high. Our results suggest that (1) inorganic N is available immediately from permafrost thaw, while (2) P availability is controlled by sorption properties, and (3) plant community, nutrient stoichiometry, and metal availability modulate how permafrost thaw affects CH4 production and oxidation.
Ämnesord
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Miljövetenskap (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Environmental Sciences (hsv//eng)
- NATURVETENSKAP -- Biologi -- Ekologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Ecology (hsv//eng)
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Klimatforskning (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Climate Research (hsv//eng)
Nyckelord
- iron
- methane oxidation
- methane production
- nutrients
- peatlands
- permafrost
- phosphorus sorption
- resource stoichiometry
- environmental science
- miljövetenskap
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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