Change search
ReferencesLink to record
Permanent link

Direct link
Total and pyrogenic carbon stocks in black spruce forest floors from eastern Canada
Umeå University, Faculty of Medicine, Department of Medical Biochemistry and Biophysics.
Show others and affiliations
2015 (English)In: Organic Geochemistry, ISSN 0146-6380, E-ISSN 1873-5290, Vol. 82, 1-11 p.Article in journal (Refereed) Published
Abstract [en]

Pyrogenic carbon (PyC), a by-product of recurrent boreal wildfires, is an important component of the global soil C pool, although precise assessment of boreal PyC stock is scarce. The overall objective of this study was to estimate total C stock and PyC stock in forest floors of Eastern Canada boreal forests. We also investigated the environmental conditions controlling the stocks and characterized the composition of the forest floor layers. Forest floor samples were collected from mesic black spruce sites recently affected by fire (3-5 yr) and analyzed using elemental analysis and solid state C-13 nuclear magnetic resonance (NMR) spectroscopy. PyC content was further estimated using a molecular mixing model. Total C stock in forest floors averaged 5.7 +/- 2.9 kg C/m(2) and PyC stock 0.6 +/- 0.3 kg C/m(2). Total stock varied with position in the landscape, with a greater accumulation of organic material on northern aspects and lower slope positions. In addition, total stock was significantly higher in spruce-dominated forest floors than stands where jack pine was present. The PyC stock was significantly related to the atomic H/C ratio (R-2 0.84) of the different organic layers. C-13 NMR spectroscopy revealed a large increase in aromatic carbon in the deepest forest floor layer (humified H horizon) at the organic-mineral soil interface. The majority of the PyC stock was located in this horizon and had been formed during past high severity fires rather than during the most recent fire event.

Place, publisher, year, edition, pages
2015. Vol. 82, 1-11 p.
Keyword [en]
Pyrogenic carbon, Boreal forest, Wildfire, Forest floor, C-13 NMR, Molecular mixing model
National Category
Medical Biotechnology (with a focus on Cell Biology (including Stem Cell Biology), Molecular Biology, Microbiology, Biochemistry or Biopharmacy)
URN: urn:nbn:se:umu:diva-103527DOI: 10.1016/j.orggeochem.2015.02.004ISI: 000352320500001OAI: diva2:814227
Available from: 2015-05-26 Created: 2015-05-21 Last updated: 2015-05-26Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full text

Search in DiVA

By author/editor
Soucemarianadin, Laure N.
By organisation
Department of Medical Biochemistry and Biophysics
In the same journal
Organic Geochemistry
Medical Biotechnology (with a focus on Cell Biology (including Stem Cell Biology), Molecular Biology, Microbiology, Biochemistry or Biopharmacy)

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 32 hits
ReferencesLink to record
Permanent link

Direct link