oru.sePublikationer
Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • 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
Dynamics of simple carbon compounds in two forest soils as revealed by soil solution concentrations and biodegradation kinetics
Örebro University, Department of Natural Sciences.
Örebro University, Department of Natural Sciences.
2008 (English)In: Plant and Soil, ISSN 0032-079X, E-ISSN 1573-5036, Vol. 310, no 1-2, p. 11-23Article in journal (Refereed) Published
Abstract [en]

Simple compounds in soil such as organic acids, amino acids and monosaccharides are believed to be important in regulating many aspects of terrestrial ecosystem functioning (e.g. C cycling, nutrient acquisition). Understanding the fate and dynamics of these low molecular weight (MW) compounds is therefore essential for predicting ecosystem responses to disturbance. Our aim was to quantify the amounts of these compounds in two podzolic forest soil profiles (O, E, Bs and C horizons) and to quantify their contribution to total soil respiration. The total concentration of organic acids, amino acids and monosaccharides in soil solution comprised on average 15 +/- 10% of the total dissolved organic C (DOC), with declining concentrations in the deeper soil layers. Dissolved organic N (DON) was the dominant form of N in soil solution and free amino acids contributed to 34% of this pool. The mineralization behaviour of glucose and galactose was described by parabolic (Michaelis-Menten) type kinetics with V-max and K (M) values in the range of < 1-250 mu mol kg(-1) h(-1) and 15-1,100 mu M, respectively. Assuming that (1) microbially mediated substrate turnover follows Michaelis-Menten kinetics, and (2) steady state soil solution concentrations, we calculated the rate of CO2 efflux attributable to the mineralisation of the three classes of low MW compounds. Our results indicated that in the O horizon, the turnover of these substrates could comprise similar to 100% of the basal, heterotrophic, soil respiration. In contrast, in the deeper mineral soil < 20% of total soil respiration could be attributable to the mineralization of these compounds. Our compound-specific approach has identified the main substrates contributing to soil respiration in forest topsoils. However, our results also suggest that soil respiration in subsoils may be attributable to compounds other than organic acids, amino acids and monosaccharides.

Place, publisher, year, edition, pages
2008. Vol. 310, no 1-2, p. 11-23
Keyword [en]
acid soil, biodegradation, carbon budget, forest soil, galactose, glucose, Norway spruce, spodosol
National Category
Environmental Sciences
Research subject
Environmental Chemistry
Identifiers
URN: urn:nbn:se:oru:diva-13552DOI: 10.1007/s11104-008-9623-3ISI: 000258456600002OAI: oai:DiVA.org:oru-13552DiVA: diva2:389495
Available from: 2011-01-19 Created: 2011-01-12 Last updated: 2017-12-11Bibliographically approved

Open Access in DiVA

No full text in DiVA

Other links

Publisher's full text

Authority records BETA

van Hees, Patrick A. W.Johansson, Emma M.

Search in DiVA

By author/editor
van Hees, Patrick A. W.Johansson, Emma M.
By organisation
Department of Natural Sciences
In the same journal
Plant and Soil
Environmental Sciences

Search outside of DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetric score

doi
urn-nbn
Total: 121 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • 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