Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Chemical Composition of Soil Organic Matter in a Subarctic Peatland: Influence of Shifting Vegetation Communities
Show others and affiliations
Responsible organisation
2017 (English)In: Soil Science Society of America Journal, ISSN 0361-5995, E-ISSN 1435-0661, Vol. 81, no 1, p. 41-49Article in journal (Refereed) Published
Abstract [en]

Climate change in the subarctic region has increased the rate of inundation of peatlands due to increased temperatures, precipitation, and permafrost thaw. Increased inundation may result in vegetation community shifts, as documented in a subarctic mire near Abisko, Sweden. The wet fen communities have established in former sphagnum areas, and sphagnum colonized in degraded palsa hummocks. At Stordalen mire, we studied the influence of vegetation community on chemical composition of peat soil organic matter (SOM). Vegetation and soil samples were obtained along a hydrologic gradient with representative communities: palsa, sphagnum, and fen. Soil organic matter chemical composition indicated shifts in vegetative communities. Total N and N isotope signatures in fen soils showed characteristics of sphagnum and palsa communities at >6-cm depth, and sphagnum soil profile signatures shifted from sphagnum to palsa properties at a 20-cm depth. Soil chemical composition measured by Fourier Transform Infrared (FTIR) spectroscopy and C-13 Nuclear Magnetic Resonance (NMR) spectroscopy showed increasing recalcitrant C (alkyl and aromatic) in palsa soil. Sphagnum soil profiles sustained labile organic C (O-alkyl) until 15 cm then shifted to humified soil, and fen soil profiles showed areas of sphagnum and palsa signatures. Furthermore, the strong relationship between functional group C (O-alkyl and alkyl) and total N demonstrated that soil N is an effective indicator of peat decomposition. Our results identified change points in soil chemical composition in regards to N content and C functional group which highlights the importance of historic vegetation community on chemical composition of peat soils.

Place, publisher, year, edition, pages
SOIL SCI SOC AMER , 2017. Vol. 81, no 1, p. 41-49
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:polar:diva-3887DOI: 10.2136/sssaj2016.05.0148OAI: oai:DiVA.org:polar-3887DiVA, id: diva2:1164410
Available from: 2017-12-11 Created: 2017-12-11 Last updated: 2017-12-11

Open Access in DiVA

No full text in DiVA

Other links

Publisher's full text
In the same journal
Soil Science Society of America Journal
Natural Sciences

Search outside of DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetric score

doi
urn-nbn
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf