Soil Data from a Moderately Well and Somewhat Poorly Drained Fire Chronosequence near Thompson, Manitoba, Canada

Manies, Kristen L.; Harden, J. W.; Veldhuis, Hugo; Trumbore, S.E.

doi:10.3133/ofr20061291

Cited by 12 publications

(13 citation statements)

References 8 publications

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“…Enrichment of soil radiocarbon occurred via plant input since 1954. Data are from sites within study areas: Thompson ( Manies et al [2006], 1930 and 1850 sites); Delta Junction ( Manies et al [2004], 1860 site), Hess Creek ( O'Donnell et al [2011], 1859 site).…”

Section: Resultsmentioning

confidence: 99%

Spatiotemporal analysis of black spruce forest soils and implications for the fate of C

Harden¹,

Manies²,

O'Donnell³

et al. 2012

J. Geophys. Res.

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.[1] Post-fire storage of carbon (C) in organic-soil horizons was measured in one Canadian and three Alaskan chronosequences in black spruce forests, together spanning stand ages of nearly 200 yrs. We used a simple mass balance model to derive estimates of inputs, losses, and accumulation rates of C on timescales of years to centuries. The model performed well for the surface and total organic soil layers and presented questions for resolving the dynamics of deeper organic soils. C accumulation in all study areas is on the order of 20-40 gC/m 2 / yr for stand ages up to $200 yrs. Much larger fluxes, both positive and negative, are detected using incremental changes in soil C stocks and by other studies using eddy covariance methods for CO 2 . This difference suggests that over the course of stand replacement, about 80% of all net primary production (NPP) is returned to the atmosphere within a fire cycle, while about 20% of NPP enters the organic soil layers and becomes available for stabilization or loss via decomposition, leaching, or combustion. Shifts toward more frequent and more severe burning and degradation of deep organic horizons would likely result in an acceleration of the carbon cycle, with greater CO 2 emissions from these systems overall.

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Section: Resultsmentioning

confidence: 99%

Spatiotemporal analysis of black spruce forest soils and implications for the fate of C

Harden¹,

Manies²,

O'Donnell³

et al. 2012

J. Geophys. Res.

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“…The parameters defining the hydraulic properties of moss, organic soil, and mineral soil can substantially affect the hydrological dynamics of the model. With respect to moss, there are two main types of bryophyte groups in boreal black spruce forests, feathermoss (e.g., Hylocomium splendens ), which generally occurs in well to intermediately drained conditions, and Sphagnum , which generally occurs in more poorly drained conditions [ Manies et al , 2006]. These moss types have distinct thermal, hydrological, and ecophysiological characteristics [e.g., see Bisbee et al , 2001].…”

Section: Discussionmentioning

confidence: 99%

“…A sensitivity analysis was performed to investigate the effects of changes in parameters and driving data on model estimates for both a moderately well drained and a poorly drained black spruce forest. The baseline thicknesses of the live moss, fibrous organic and amorphous organic horizons were set to 2, 7, and 5 cm for the moderately well drained forest, and to 3, 17, and 14 cm for the poorly drained forest based on the mean organic horizon thicknesses of black spruce stands in Manitoba, Canada [ Manies et al , 2006; Yi et al , 2009] and Alaska [ Manies et al , 2003]. For the baseline simulation, the 2006 atmospheric driving data of the Donnelly Flats sites were used to run EnvM without changing any parameters.…”

Section: Methodsmentioning

confidence: 99%

Interactions between soil thermal and hydrological dynamics in the response of Alaska ecosystems to fire disturbance

et al. 2009

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[1] Soil temperature and moisture are important factors that control many ecosystem processes. However, interactions between soil thermal and hydrological processes are not adequately understood in cold regions, where the frozen soil, fire disturbance, and soil drainage play important roles in controlling interactions among these processes. These interactions were investigated with a new ecosystem model framework, the dynamic organic soil version of the Terrestrial Ecosystem Model, that incorporates an efficient and stable numerical scheme for simulating soil thermal and hydrological dynamics within soil profiles that contain a live moss horizon, fibrous and amorphous organic horizons, and mineral soil horizons. The performance of the model was evaluated for a tundra burn site that had both preburn and postburn measurements, two black spruce fire chronosequences (representing space-for-time substitutions in well and intermediately drained conditions), and a poorly drained black spruce site. Although space-for-time substitutions present challenges in modeldata comparison, the model demonstrates substantial ability in simulating the dynamics of evapotranspiration, soil temperature, active layer depth, soil moisture, and water table depth in response to both climate variability and fire disturbance. Several differences between model simulations and field measurements identified key challenges for evaluating/improving model performance that include (1) proper representation of discrepancies between air temperature and ground surface temperature; (2) minimization of precipitation biases in the driving data sets; (3) improvement of the measurement accuracy of soil moisture in surface organic horizons; and (4) proper specification of organic horizon depth/properties, and soil thermal conductivity.

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“…Detailed methods can be found in Manies et al (2006). At each site, soil pits were also excavated by shovel to depth of the C horizon (102-136 cm) in years 2001 to 2004.…”

Section: Soil Samplingmentioning

confidence: 99%

“…The following partial differential equation describes the heat transport by conduction with phase change, plus by the movement of Manies et al (2006Manies et al ( , 2003. b The soil horizons were classified based on the method described in Harden et al…”

Section: Model Descriptionmentioning

confidence: 99%

Water and heat transport in boreal soils: Implications for soil response to climate change

Fan

Neff

Harden

et al. 2011

Science of The Total Environment

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Soil Data from a Moderately Well and Somewhat Poorly Drained Fire Chronosequence near Thompson, Manitoba, Canada

Cited by 12 publications

References 8 publications

Spatiotemporal analysis of black spruce forest soils and implications for the fate of C

Spatiotemporal analysis of black spruce forest soils and implications for the fate of C

Interactions between soil thermal and hydrological dynamics in the response of Alaska ecosystems to fire disturbance

Water and heat transport in boreal soils: Implications for soil response to climate change

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