Elemental storage of forest soil from local to global scales

Zinke, Paul J.; Stangenberger, A.G.

doi:10.1016/s0378-1127(00)00394-7

Cited by 25 publications

(21 citation statements)

References 5 publications

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“…Carbon pools at higher elevations tend to be higher, due to the slower turnover rates. These findings are in agreement with experimental measurements by Rodeghiero and Cescatti (2005); Zinke and Stangenberger (2000), but not with Perruchoud et al (2000) who found little evidence for a significant influence of climate on soil carbon stocks in Swiss forests.…”

Section: Long-term Soil Carbon Stocksupporting

confidence: 91%

Temperature response functions introduce high uncertainty in modelled carbon stocks in cold temperature regimes

2010

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Abstract. Models of carbon cycling in terrestrial ecosystems contain formulations for the dependence of respiration on temperature, but the sensitivity of predicted carbon pools and fluxes to these formulations and their parameterization is not well understood. Thus, we performed an uncertainty analysis of soil organic matter decomposition with respect to its temperature dependency using the ecosystem model LPJ-GUESS.We used five temperature response functions (Exponential, Arrhenius, Lloyd-Taylor, Gaussian, Van't Hoff). We determined the parameter confidence ranges of the formulations by nonlinear regression analysis based on eight experimental datasets from Northern Hemisphere ecosystems. We sampled over the confidence ranges of the parameters and ran simulations for each pair of temperature response function and calibration site. We analyzed both the long-term and the short-term heterotrophic soil carbon dynamics over a virtual elevation gradient in southern Switzerland.The temperature relationship of Lloyd-Taylor fitted the overall data set best as the other functions either resulted in poor fits (Exponential, Arrhenius) or were not applicable for all datasets (Gaussian, Van't Hoff). There were two main sources of uncertainty for model simulations: (1) the lack of confidence in the parameter estimates of the temperature response, which increased with increasing temperature, and (2) the size of the simulated soil carbon pools, which increased with elevation, as slower turn-over times lead to higher carbon stocks and higher associated uncertainties. Our results therefore indicate that such projections are Correspondence to: A. Wolf (annett.wolf@env.ethz.ch) more uncertain for higher elevations and hence also higher latitudes, which are of key importance for the global terrestrial carbon budget.

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Section: Long-term Soil Carbon Stocksupporting

confidence: 91%

Temperature response functions introduce high uncertainty in modelled carbon stocks in cold temperature regimes

2010

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“…The number and sometimes the complexity of the variation factors previously cited probably explain the small number of spatial distribution studies on soil chemical properties under forest [10,20,28,39,48]. Further developments in this domain are also required and could improve the future management of forests (for example, well thought-out enrichment in damaged forest ecosystem or the choice of appropriate forest species) in a context of ecosystem sustainability [31].…”

Section: Introductionmentioning

confidence: 99%

“…Further developments in this domain are also required and could improve the future management of forests (for example, well thought-out enrichment in damaged forest ecosystem or the choice of appropriate forest species) in a context of ecosystem sustainability [31]. Several approaches, summarised by Ryan et al [39], make the study or the cartography of nutrient stocks possible: the use of environmental correlation models [39], geostatistical methods [20] or stratification methods [10,28,48] which offer advantages. In fact, stratification, following detailed identification of variation factors, allows one to investigate the distribution of element stocks at different spatial scales at an acceptable cost, such as the carbon in Lecointe et al [28].…”

Section: Introductionmentioning

confidence: 99%

Variabilité spatiale des réserves de nutriments dans les humus et les sols d’un massif forestier (Fougères, France)

2008

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-In this study, the spatial distribution of nutrient stocks (K, Ca, Mg and P) was examined in humus and soils at the forest massif scale (Fougères forest, France). A random stratified sampling plan including 100 sampling points was used and three potential variation factors of nutrient stocks were tested: age of stand, type of stand (broad-leaved or coniferous trees) and type of soil. Sampling classes were then compared and the variation factors were examined. Results demonstrated that nutrient stocks in the humus were not influenced by the cited factors and only the type of soil influenced nutrient stocks in soils. In fact, stocks of exchangeable elements in soils were much higher in Colluviosols-Fluviosols which show redoximorphic characteristics, and available phosphorus stocks were lower than in Alocrisols-Neoluvisols. Moreover, a low variability of nutrient stocks was observed in Alocrisols-Neoluvisols as opposed to Colluviosols-Fluviosols, which may suggest the existence of other variation factors not taken into account in this study (hydromorphic gradient, type and age of stand in hydromorphic zones).

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“…OIL IS A MAJOR POOL in regional budgets and the global cycles of C (Jobbagy and Jackson, 2000;Zinke and Stangenberger, 2000;Bernoux et al, 2002; Goodale et al., 2002). Soil C content varies considerably within landscapes and between regions.…”

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confidence: 99%

Carbon Storage in Coarse and Fine Fractions of Pacific Northwest Old‐Growth Forest Soils

Homann

Remillard

Harmon

et al. 2004

Soil Science Soc of Amer J

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Many assessments of soil C have been restricted to the <2-mm fraction, but C has recently been identified in >2-mm fractions of forest mineral soils. Our objective was to determine the importance of the >2mm fraction to whole-soil C pools in Pacific Northwest old-growth coniferous forests. Seventy-nine pedons in 18 western Washington and Oregon forests were sampled to o depth of 100 cm. The <2-mm fraction was separated f'rom the >2-mm fractioo by airdrying, physicalty rrushing soil, and sieving; C was determined by Leco combustion. The >2-mm fraction contained up to 46% of the whole-soil C and averaged 23% for the seven forests that had C in that fraction. Following treatment with sodium hexametaphosphate to disaggregate soil material, up to 20% of whole-soil C remained in the >2-mm frsction Thus, the >2-mm fraction C appears to be in stable and unstable aggregates, as well as concretions. The whole-soil C in the surEsce 100 em of mineral soil ranged from 30 to 400 Mg C ha-'. Multiple regression analysis indicated this C pool was positively related to available water capacity, annual precipitation, and coarse woody debris (rZ = 0.63 to 0.66, n = 18 forests). Similar results were obtained with only the <2-mm soil C, which is the basis of previous regional evalmtions. This suggests consideration of the >2-mm fraction does not alter our understanding of the importance of dimate and soil texture as controls of soil C pools, but it does affect the quantificatiun of soil C pools lo many *ld-growth forests ie the Pocific Northwest. SOIL IS A MAJOR POOL in regional budgets and the global cycles of C (Jobbagy and Jackson, 2000;Zinke and Stangenberger, 2000;Bernoux et al., 2002; Goodale et al., 2002). Soil C content varies considerably within landscapes and between regions. It is influenced by climate, soil texture, topography, vegetation, and land management (Homann et al., 1995; Jobbigy and Jackson, 2000;Parker et al., 2001). There is considerable uncertainty associated with estimates of soil C pools and their association with controlling variables, because of sampling and analytical difgculties, soil spatial variability, and methods of extrapolation to regions (Homann et al., 1995(Homann et al., , 1998(Homann et al., , 2001 Brejda et al., 2001).Most studies of soil C pools have measured only fine fractions of the soil, such as €2, <3, or <4 mm (Grigal and Ohmann, 1992;Canary et al., 2000;Parker et al., 2001; Brejda et al., 2001;Homann et al., 2001). Recent investigations of forests indicate the coarse fractions can the fine fraction would substantially underestimate the whole-soil C pool. For example, the <2-mm fraction contains only 63% of whole-soil C in a coastal Oregon forest (Cromack et al., 1999), 53 to 80% in three Australian forest sites (Bauhus et al., 2002), and 37% in one western Washington forest but 97% in another (Harrison et al., 2003).Some >2-mm C may be associated with charcoal or rocks (Bauhus et al., 2002;Harrison et al., 2003). Alternatively, it may be contained in aggregates that are not b...

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Elemental storage of forest soil from local to global scales

Cited by 25 publications

References 5 publications

Temperature response functions introduce high uncertainty in modelled carbon stocks in cold temperature regimes

Temperature response functions introduce high uncertainty in modelled carbon stocks in cold temperature regimes

Variabilité spatiale des réserves de nutriments dans les humus et les sols d’un massif forestier (Fougères, France)

Carbon Storage in Coarse and Fine Fractions of Pacific Northwest Old‐Growth Forest Soils

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