Data_Sheet_1_Controls on Soil Organic Matter Degradation and Subsequent Greenhouse Gas Emissions Across a Permafrost Thaw Gradient in Northern Sweden.docx
Warming-induced permafrost thaw could enhance microbial decomposition of previously stored soil organic matter (SOM) to carbon dioxide (CO 2 ) and methane (CH 4 ), one of the most significant potential feedbacks from terrestrial ecosystems to the atmosphere in a changing climate. The environmental p...
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ftfrontimediafig:oai:figshare.com:article/13013987 2023-05-15T17:45:14+02:00 Data_Sheet_1_Controls on Soil Organic Matter Degradation and Subsequent Greenhouse Gas Emissions Across a Permafrost Thaw Gradient in Northern Sweden.docx Roya AminiTabrizi Rachel M. Wilson Jane D. Fudyma Suzanne B. Hodgkins Heino M. Heyman Virginia I. Rich Scott R. Saleska Jeffrey P. Chanton Malak M. Tfaily 2020-09-28T13:50:50Z https://doi.org/10.3389/feart.2020.557961.s001 https://figshare.com/articles/dataset/Data_Sheet_1_Controls_on_Soil_Organic_Matter_Degradation_and_Subsequent_Greenhouse_Gas_Emissions_Across_a_Permafrost_Thaw_Gradient_in_Northern_Sweden_docx/13013987 unknown doi:10.3389/feart.2020.557961.s001 https://figshare.com/articles/dataset/Data_Sheet_1_Controls_on_Soil_Organic_Matter_Degradation_and_Subsequent_Greenhouse_Gas_Emissions_Across_a_Permafrost_Thaw_Gradient_in_Northern_Sweden_docx/13013987 CC BY 4.0 CC-BY Solid Earth Sciences Climate Science Atmospheric Sciences not elsewhere classified Exploration Geochemistry Inorganic Geochemistry Isotope Geochemistry Organic Geochemistry Geochemistry not elsewhere classified Igneous and Metamorphic Petrology Ore Deposit Petrology Palaeontology (incl. Palynology) Structural Geology Tectonics Volcanology Geology not elsewhere classified Seismology and Seismic Exploration Glaciology Hydrogeology Natural Hazards Quaternary Environments Earth Sciences not elsewhere classified Evolutionary Impacts of Climate Change permafrost peatlands soil organic matter fen bog mass spectrometry sphagnum Dataset 2020 ftfrontimediafig https://doi.org/10.3389/feart.2020.557961.s001 2020-09-30T22:56:21Z Warming-induced permafrost thaw could enhance microbial decomposition of previously stored soil organic matter (SOM) to carbon dioxide (CO 2 ) and methane (CH 4 ), one of the most significant potential feedbacks from terrestrial ecosystems to the atmosphere in a changing climate. The environmental parameters regulating microbe-organic matter interactions and greenhouse gas (GHG) emissions in northern permafrost peatlands are however still largely unknown. The objective of this work is to understand controls on SOM degradation and its impact on porewater GHG concentrations across the Stordalen Mire, a thawing peat plateau in Northern Sweden. Here, we applied high-resolution mass spectrometry to characterize SOM molecular composition in peat soil samples from the active layers of a Sphagnum-dominated bog and rich fen sites in the Mire. Microbe-organic matter interactions and porewater GHG concentrations across the thaw gradient were controlled by aboveground vegetation and soil pH. An increasingly high abundance of reduced organic compounds experiencing greater humification rates due to enhanced microbial activity were observed with increasing thaw, in parallel with higher CH 4 and CO 2 porewater concentrations. Bog SOM however contained more Sphagnum-derived phenolics, simple carbohydrates, and organic- acids. The low degradation of bog SOM by microbial communities, the enhanced SOM transformation by potentially abiotic mechanisms, and the accumulation of simple carbohydrates in the bog sites could be attributed in part to the low pH conditions of the system associated with Sphagnum mosses. We show that Gibbs free energy of C half reactions based on C oxidation state for OM can be used as a quantifiable measure for OM decomposability and quality to enhance current biogeochemical models to predict C decomposition rates. We found a direct association between OM chemical diversity and δ 13 C-CH 4 in peat porewater; where higher substrate diversity was positively correlated with enriched δ 13 C-CH 4 in fen sites. ... Dataset Northern Sweden Peat Peat plateau permafrost Frontiers: Figshare Stordalen ENVELOPE(7.337,7.337,62.510,62.510) |
institution |
Open Polar |
collection |
Frontiers: Figshare |
op_collection_id |
ftfrontimediafig |
language |
unknown |
topic |
Solid Earth Sciences Climate Science Atmospheric Sciences not elsewhere classified Exploration Geochemistry Inorganic Geochemistry Isotope Geochemistry Organic Geochemistry Geochemistry not elsewhere classified Igneous and Metamorphic Petrology Ore Deposit Petrology Palaeontology (incl. Palynology) Structural Geology Tectonics Volcanology Geology not elsewhere classified Seismology and Seismic Exploration Glaciology Hydrogeology Natural Hazards Quaternary Environments Earth Sciences not elsewhere classified Evolutionary Impacts of Climate Change permafrost peatlands soil organic matter fen bog mass spectrometry sphagnum |
spellingShingle |
Solid Earth Sciences Climate Science Atmospheric Sciences not elsewhere classified Exploration Geochemistry Inorganic Geochemistry Isotope Geochemistry Organic Geochemistry Geochemistry not elsewhere classified Igneous and Metamorphic Petrology Ore Deposit Petrology Palaeontology (incl. Palynology) Structural Geology Tectonics Volcanology Geology not elsewhere classified Seismology and Seismic Exploration Glaciology Hydrogeology Natural Hazards Quaternary Environments Earth Sciences not elsewhere classified Evolutionary Impacts of Climate Change permafrost peatlands soil organic matter fen bog mass spectrometry sphagnum Roya AminiTabrizi Rachel M. Wilson Jane D. Fudyma Suzanne B. Hodgkins Heino M. Heyman Virginia I. Rich Scott R. Saleska Jeffrey P. Chanton Malak M. Tfaily Data_Sheet_1_Controls on Soil Organic Matter Degradation and Subsequent Greenhouse Gas Emissions Across a Permafrost Thaw Gradient in Northern Sweden.docx |
topic_facet |
Solid Earth Sciences Climate Science Atmospheric Sciences not elsewhere classified Exploration Geochemistry Inorganic Geochemistry Isotope Geochemistry Organic Geochemistry Geochemistry not elsewhere classified Igneous and Metamorphic Petrology Ore Deposit Petrology Palaeontology (incl. Palynology) Structural Geology Tectonics Volcanology Geology not elsewhere classified Seismology and Seismic Exploration Glaciology Hydrogeology Natural Hazards Quaternary Environments Earth Sciences not elsewhere classified Evolutionary Impacts of Climate Change permafrost peatlands soil organic matter fen bog mass spectrometry sphagnum |
description |
Warming-induced permafrost thaw could enhance microbial decomposition of previously stored soil organic matter (SOM) to carbon dioxide (CO 2 ) and methane (CH 4 ), one of the most significant potential feedbacks from terrestrial ecosystems to the atmosphere in a changing climate. The environmental parameters regulating microbe-organic matter interactions and greenhouse gas (GHG) emissions in northern permafrost peatlands are however still largely unknown. The objective of this work is to understand controls on SOM degradation and its impact on porewater GHG concentrations across the Stordalen Mire, a thawing peat plateau in Northern Sweden. Here, we applied high-resolution mass spectrometry to characterize SOM molecular composition in peat soil samples from the active layers of a Sphagnum-dominated bog and rich fen sites in the Mire. Microbe-organic matter interactions and porewater GHG concentrations across the thaw gradient were controlled by aboveground vegetation and soil pH. An increasingly high abundance of reduced organic compounds experiencing greater humification rates due to enhanced microbial activity were observed with increasing thaw, in parallel with higher CH 4 and CO 2 porewater concentrations. Bog SOM however contained more Sphagnum-derived phenolics, simple carbohydrates, and organic- acids. The low degradation of bog SOM by microbial communities, the enhanced SOM transformation by potentially abiotic mechanisms, and the accumulation of simple carbohydrates in the bog sites could be attributed in part to the low pH conditions of the system associated with Sphagnum mosses. We show that Gibbs free energy of C half reactions based on C oxidation state for OM can be used as a quantifiable measure for OM decomposability and quality to enhance current biogeochemical models to predict C decomposition rates. We found a direct association between OM chemical diversity and δ 13 C-CH 4 in peat porewater; where higher substrate diversity was positively correlated with enriched δ 13 C-CH 4 in fen sites. ... |
format |
Dataset |
author |
Roya AminiTabrizi Rachel M. Wilson Jane D. Fudyma Suzanne B. Hodgkins Heino M. Heyman Virginia I. Rich Scott R. Saleska Jeffrey P. Chanton Malak M. Tfaily |
author_facet |
Roya AminiTabrizi Rachel M. Wilson Jane D. Fudyma Suzanne B. Hodgkins Heino M. Heyman Virginia I. Rich Scott R. Saleska Jeffrey P. Chanton Malak M. Tfaily |
author_sort |
Roya AminiTabrizi |
title |
Data_Sheet_1_Controls on Soil Organic Matter Degradation and Subsequent Greenhouse Gas Emissions Across a Permafrost Thaw Gradient in Northern Sweden.docx |
title_short |
Data_Sheet_1_Controls on Soil Organic Matter Degradation and Subsequent Greenhouse Gas Emissions Across a Permafrost Thaw Gradient in Northern Sweden.docx |
title_full |
Data_Sheet_1_Controls on Soil Organic Matter Degradation and Subsequent Greenhouse Gas Emissions Across a Permafrost Thaw Gradient in Northern Sweden.docx |
title_fullStr |
Data_Sheet_1_Controls on Soil Organic Matter Degradation and Subsequent Greenhouse Gas Emissions Across a Permafrost Thaw Gradient in Northern Sweden.docx |
title_full_unstemmed |
Data_Sheet_1_Controls on Soil Organic Matter Degradation and Subsequent Greenhouse Gas Emissions Across a Permafrost Thaw Gradient in Northern Sweden.docx |
title_sort |
data_sheet_1_controls on soil organic matter degradation and subsequent greenhouse gas emissions across a permafrost thaw gradient in northern sweden.docx |
publishDate |
2020 |
url |
https://doi.org/10.3389/feart.2020.557961.s001 https://figshare.com/articles/dataset/Data_Sheet_1_Controls_on_Soil_Organic_Matter_Degradation_and_Subsequent_Greenhouse_Gas_Emissions_Across_a_Permafrost_Thaw_Gradient_in_Northern_Sweden_docx/13013987 |
long_lat |
ENVELOPE(7.337,7.337,62.510,62.510) |
geographic |
Stordalen |
geographic_facet |
Stordalen |
genre |
Northern Sweden Peat Peat plateau permafrost |
genre_facet |
Northern Sweden Peat Peat plateau permafrost |
op_relation |
doi:10.3389/feart.2020.557961.s001 https://figshare.com/articles/dataset/Data_Sheet_1_Controls_on_Soil_Organic_Matter_Degradation_and_Subsequent_Greenhouse_Gas_Emissions_Across_a_Permafrost_Thaw_Gradient_in_Northern_Sweden_docx/13013987 |
op_rights |
CC BY 4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.3389/feart.2020.557961.s001 |
_version_ |
1766148079989293056 |