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Carbon storage in the organic layers of boreal forest soils under various moisture conditions: A model study for Northern Sweden sites

Yurova, Alla LU and Lankreijer, Harry LU (2007) In Ecological Modelling 204(3-4). p.475-484
Abstract
A typical feature of the boreal forest landscape is a gradient from dry to wet sites, with associated increases in the depth of the soil organic layers. In this study, the coupled ecosystem-soil biogeochemistry model GUESS-ROMUL is used to explore how the specific features of soil organic matter decomposition and vegetation dynamics account for an observed difference between the soils formed under contrasting moisture conditions. Two sites, one mesic and one mesic-to-wet, representative of the natural forest in Northern Sweden, are simulated. In addition to the assumptions underlying the GUESS-ROMUL model, it is assumed that the fire frequency was higher at the mesic site. The model shows that with a natural fire regime, the soil organic... (More)
A typical feature of the boreal forest landscape is a gradient from dry to wet sites, with associated increases in the depth of the soil organic layers. In this study, the coupled ecosystem-soil biogeochemistry model GUESS-ROMUL is used to explore how the specific features of soil organic matter decomposition and vegetation dynamics account for an observed difference between the soils formed under contrasting moisture conditions. Two sites, one mesic and one mesic-to-wet, representative of the natural forest in Northern Sweden, are simulated. In addition to the assumptions underlying the GUESS-ROMUL model, it is assumed that the fire frequency was higher at the mesic site. The model shows that with a natural fire regime, the soil organic layers at the mesic-to-wet site store 6.0 kg C m(-2) compared to 3.1 kg C m(-2) at the mesic site. Forty-seven percent of the difference between the sites in this respect is explained by suppressed decomposition under higher moisture conditions, 37% by the decreased litter input into the soil (more frequently disturbed ecosystems have lower productivity) and 16% by direct consumption of the forest floor in fires. It is predicted that due to anthropogenic fire suppression the organic soil layers of mesic sites will, in the future, sequester carbon at an average rate of 0.0103 kg C m(-2) year(-1) and have an equilibrium storage capacity of 5.4 kg C m(-2). For the mesic-to-wet site, the model predicts an extremely slow sequestration rate of 0.0022 kg C m(-2) year(-1). The effect of increased precipitation on the carbon storage at the landscape level is also investigated. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
ROMUL, GUESS, model, dynamics, vegetation, boreal forest, soil moisture, carbon sequestration
in
Ecological Modelling
volume
204
issue
3-4
pages
475 - 484
publisher
Elsevier
external identifiers
  • wos:000246746700017
  • scopus:34247480034
ISSN
0304-3800
DOI
10.1016/j.ecolmodel.2007.02.003
language
English
LU publication?
yes
id
a1638527-cb6f-44ac-8ef3-48f27836c182 (old id 657882)
date added to LUP
2007-12-19 11:40:21
date last changed
2017-01-01 06:54:27
@article{a1638527-cb6f-44ac-8ef3-48f27836c182,
  abstract     = {A typical feature of the boreal forest landscape is a gradient from dry to wet sites, with associated increases in the depth of the soil organic layers. In this study, the coupled ecosystem-soil biogeochemistry model GUESS-ROMUL is used to explore how the specific features of soil organic matter decomposition and vegetation dynamics account for an observed difference between the soils formed under contrasting moisture conditions. Two sites, one mesic and one mesic-to-wet, representative of the natural forest in Northern Sweden, are simulated. In addition to the assumptions underlying the GUESS-ROMUL model, it is assumed that the fire frequency was higher at the mesic site. The model shows that with a natural fire regime, the soil organic layers at the mesic-to-wet site store 6.0 kg C m(-2) compared to 3.1 kg C m(-2) at the mesic site. Forty-seven percent of the difference between the sites in this respect is explained by suppressed decomposition under higher moisture conditions, 37% by the decreased litter input into the soil (more frequently disturbed ecosystems have lower productivity) and 16% by direct consumption of the forest floor in fires. It is predicted that due to anthropogenic fire suppression the organic soil layers of mesic sites will, in the future, sequester carbon at an average rate of 0.0103 kg C m(-2) year(-1) and have an equilibrium storage capacity of 5.4 kg C m(-2). For the mesic-to-wet site, the model predicts an extremely slow sequestration rate of 0.0022 kg C m(-2) year(-1). The effect of increased precipitation on the carbon storage at the landscape level is also investigated.},
  author       = {Yurova, Alla and Lankreijer, Harry},
  issn         = {0304-3800},
  keyword      = {ROMUL,GUESS,model,dynamics,vegetation,boreal forest,soil moisture,carbon sequestration},
  language     = {eng},
  number       = {3-4},
  pages        = {475--484},
  publisher    = {Elsevier},
  series       = {Ecological Modelling},
  title        = {Carbon storage in the organic layers of boreal forest soils under various moisture conditions: A model study for Northern Sweden sites},
  url          = {http://dx.doi.org/10.1016/j.ecolmodel.2007.02.003},
  volume       = {204},
  year         = {2007},
}