The importance of calcium and amorphous silica for arctic soil CO2 production
Future warming of the Arctic not only threatens to destabilize the enormous pool of organic carbon accumulated in permafrost soils but may also mobilize elements such as calcium (Ca) or silicon (Si). While for Greenlandic soils, it was recently shown that both elements may have a strong effect on ca...
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| Format: | Article |
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Frontiers Media S.A.
2022-11-01
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| Series: | Frontiers in Environmental Science |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fenvs.2022.1019610/full |
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| author | Peter Stimmler Mathias Göckede Susan M. Natali Oliver Sonnentag Benjamin S. Gilfedder Nia Perron Jörg Schaller |
| author_facet | Peter Stimmler Mathias Göckede Susan M. Natali Oliver Sonnentag Benjamin S. Gilfedder Nia Perron Jörg Schaller |
| author_sort | Peter Stimmler |
| collection | DOAJ |
| description | Future warming of the Arctic not only threatens to destabilize the enormous pool of organic carbon accumulated in permafrost soils but may also mobilize elements such as calcium (Ca) or silicon (Si). While for Greenlandic soils, it was recently shown that both elements may have a strong effect on carbon dioxide (CO2) production with Ca strongly decreasing and Si increasing CO2 production, little is known about the effects of Si and Ca on carbon cycle processes in soils from Siberia, the Canadian Shield, or Alaska. In this study, we incubated five different soils (rich organic soil from the Canadian Shield and from Siberia (one from the top and one from the deeper soil layer) and one acidic and one non-acidic soil from Alaska) for 6 months under both drained and waterlogged conditions and at different Ca and amorphous Si (ASi) concentrations. Our results show a strong decrease in soil CO2 production for all soils under both drained and waterlogged conditions with increasing Ca concentrations. The ASi effect was not clear across the different soils used, with soil CO2 production increasing, decreasing, or not being significantly affected depending on the soil type and if the soils were initially drained or waterlogged. We found no methane production in any of the soils regardless of treatment. Taking into account the predicted change in Si and Ca availability under a future warmer Arctic climate, the associated fertilization effects would imply potentially lower greenhouse gas production from Siberia and slightly increased greenhouse gas emissions from the Canadian Shield. Including Ca as a controlling factor for Arctic soil CO2 production rates may, therefore, reduces uncertainties in modeling future scenarios on how Arctic regions may respond to climate change. |
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| format | Article |
| id | doaj.art-8e8b58b7bb7b4e48a831597cecc0456b |
| institution | Directory Open Access Journal |
| issn | 2296-665X |
| language | English |
| last_indexed | 2024-04-12T00:24:24Z |
| publishDate | 2022-11-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Environmental Science |
| spelling | doaj.art-8e8b58b7bb7b4e48a831597cecc0456b2022-12-22T03:55:34ZengFrontiers Media S.A.Frontiers in Environmental Science2296-665X2022-11-011010.3389/fenvs.2022.10196101019610The importance of calcium and amorphous silica for arctic soil CO2 productionPeter Stimmler0Mathias Göckede1Susan M. Natali2Oliver Sonnentag3Benjamin S. Gilfedder4Nia Perron5Jörg Schaller6Centre for Agriculture Landscape Research e.V. (ZALF), Müncheberg, GermanyMax Planck Institute for Biogeochemistry, Jena, GermanyWoodwell Climate Research Center, Falmouth, MA, United StatesDépartement de Géographie, Université de Montréal, Montréal, QC, CanadaLimnological Station, Bayreuth Center of Ecology and Environmental Research (BAYCEER), University of Bayreuth, Bayreuth, GermanyDépartement de Géographie, Université de Montréal, Montréal, QC, CanadaCentre for Agriculture Landscape Research e.V. (ZALF), Müncheberg, GermanyFuture warming of the Arctic not only threatens to destabilize the enormous pool of organic carbon accumulated in permafrost soils but may also mobilize elements such as calcium (Ca) or silicon (Si). While for Greenlandic soils, it was recently shown that both elements may have a strong effect on carbon dioxide (CO2) production with Ca strongly decreasing and Si increasing CO2 production, little is known about the effects of Si and Ca on carbon cycle processes in soils from Siberia, the Canadian Shield, or Alaska. In this study, we incubated five different soils (rich organic soil from the Canadian Shield and from Siberia (one from the top and one from the deeper soil layer) and one acidic and one non-acidic soil from Alaska) for 6 months under both drained and waterlogged conditions and at different Ca and amorphous Si (ASi) concentrations. Our results show a strong decrease in soil CO2 production for all soils under both drained and waterlogged conditions with increasing Ca concentrations. The ASi effect was not clear across the different soils used, with soil CO2 production increasing, decreasing, or not being significantly affected depending on the soil type and if the soils were initially drained or waterlogged. We found no methane production in any of the soils regardless of treatment. Taking into account the predicted change in Si and Ca availability under a future warmer Arctic climate, the associated fertilization effects would imply potentially lower greenhouse gas production from Siberia and slightly increased greenhouse gas emissions from the Canadian Shield. Including Ca as a controlling factor for Arctic soil CO2 production rates may, therefore, reduces uncertainties in modeling future scenarios on how Arctic regions may respond to climate change.https://www.frontiersin.org/articles/10.3389/fenvs.2022.1019610/fullArctic soilclimate changeGHG productiongreenhouse gas emissionssiliconsoil respiration |
| spellingShingle | Peter Stimmler Mathias Göckede Susan M. Natali Oliver Sonnentag Benjamin S. Gilfedder Nia Perron Jörg Schaller The importance of calcium and amorphous silica for arctic soil CO2 production Frontiers in Environmental Science Arctic soil climate change GHG production greenhouse gas emissions silicon soil respiration |
| title | The importance of calcium and amorphous silica for arctic soil CO2 production |
| title_full | The importance of calcium and amorphous silica for arctic soil CO2 production |
| title_fullStr | The importance of calcium and amorphous silica for arctic soil CO2 production |
| title_full_unstemmed | The importance of calcium and amorphous silica for arctic soil CO2 production |
| title_short | The importance of calcium and amorphous silica for arctic soil CO2 production |
| title_sort | importance of calcium and amorphous silica for arctic soil co2 production |
| topic | Arctic soil climate change GHG production greenhouse gas emissions silicon soil respiration |
| url | https://www.frontiersin.org/articles/10.3389/fenvs.2022.1019610/full |
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