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Organic carbon stocks and sequestration rates of forest soils in Germany.

Grüneberg E, Ziche D, Wellbrock N - Glob Chang Biol (2014)

Bottom Line: We identified the organic layer C pool as stable although C was significantly sequestered under coniferous forest at lowland sites.The applied uncertainty analyses in this study link the variability of strata with measurement errors.In accordance to other studies for Central Europe, the results showed that the applied method enabled a reliable nationwide quantification of the soil C pool development for a certain period.

View Article: PubMed Central - PubMed

Affiliation: Johann Heinrich von Thünen Institute, Institute of Forest Ecosystems, Alfred-Möller-Straße 1, 16225, Eberswalde, Germany.

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Relative contribution of differing variance components to the overall variance of the estimated C sequestration rate of the mineral soil. The relative contribution was calculated as the portion of the sum of the total contribution of the variance components consisting of covariance (cov) or variance (s2) of C concentrations/fine-earth stocks (Corg/FES) of the first/second (I/II) National Forest Soil Inventory (NFSI). The calculation considered data consisting exclusively of independent measurements of the respect parameter for both inventories.
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fig07: Relative contribution of differing variance components to the overall variance of the estimated C sequestration rate of the mineral soil. The relative contribution was calculated as the portion of the sum of the total contribution of the variance components consisting of covariance (cov) or variance (s2) of C concentrations/fine-earth stocks (Corg/FES) of the first/second (I/II) National Forest Soil Inventory (NFSI). The calculation considered data consisting exclusively of independent measurements of the respect parameter for both inventories.

Mentions: We showed that the largest part of the overall sample variance was explained by the variance of the C concentrations, which was evident for both inventories (Fig.7). In contrast, the fine-earth stock variances were less prominent for both inventories. The covariance among the variables within both inventories and in particular the covariance of the C concentrations contributed to a decrease in the overall uncertainties for both inventories. The total uncertainty of the annual C sequestration estimations of the mineral soil were composed out of differing estimated uncertainties (Fig.8). Mineral soils showed uncertainties ranging from 0.037 Mg ha−1 yr−1 (sample variance) to 0.058 Mg ha−1 yr−1 (laboratory analysis to determine C concentrations of NFSI I). The uncertainties for the organic layer ranged from 0.015 Mg ha−1 yr−1 (laboratory analysis to determine C concentrations of NFSI II) to 0.023 Mg ha−1 yr−1 (laboratory analysis to determine C concentrations of NFSI I).


Organic carbon stocks and sequestration rates of forest soils in Germany.

Grüneberg E, Ziche D, Wellbrock N - Glob Chang Biol (2014)

Relative contribution of differing variance components to the overall variance of the estimated C sequestration rate of the mineral soil. The relative contribution was calculated as the portion of the sum of the total contribution of the variance components consisting of covariance (cov) or variance (s2) of C concentrations/fine-earth stocks (Corg/FES) of the first/second (I/II) National Forest Soil Inventory (NFSI). The calculation considered data consisting exclusively of independent measurements of the respect parameter for both inventories.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4257524&req=5

fig07: Relative contribution of differing variance components to the overall variance of the estimated C sequestration rate of the mineral soil. The relative contribution was calculated as the portion of the sum of the total contribution of the variance components consisting of covariance (cov) or variance (s2) of C concentrations/fine-earth stocks (Corg/FES) of the first/second (I/II) National Forest Soil Inventory (NFSI). The calculation considered data consisting exclusively of independent measurements of the respect parameter for both inventories.
Mentions: We showed that the largest part of the overall sample variance was explained by the variance of the C concentrations, which was evident for both inventories (Fig.7). In contrast, the fine-earth stock variances were less prominent for both inventories. The covariance among the variables within both inventories and in particular the covariance of the C concentrations contributed to a decrease in the overall uncertainties for both inventories. The total uncertainty of the annual C sequestration estimations of the mineral soil were composed out of differing estimated uncertainties (Fig.8). Mineral soils showed uncertainties ranging from 0.037 Mg ha−1 yr−1 (sample variance) to 0.058 Mg ha−1 yr−1 (laboratory analysis to determine C concentrations of NFSI I). The uncertainties for the organic layer ranged from 0.015 Mg ha−1 yr−1 (laboratory analysis to determine C concentrations of NFSI II) to 0.023 Mg ha−1 yr−1 (laboratory analysis to determine C concentrations of NFSI I).

Bottom Line: We identified the organic layer C pool as stable although C was significantly sequestered under coniferous forest at lowland sites.The applied uncertainty analyses in this study link the variability of strata with measurement errors.In accordance to other studies for Central Europe, the results showed that the applied method enabled a reliable nationwide quantification of the soil C pool development for a certain period.

View Article: PubMed Central - PubMed

Affiliation: Johann Heinrich von Thünen Institute, Institute of Forest Ecosystems, Alfred-Möller-Straße 1, 16225, Eberswalde, Germany.

Show MeSH
Related in: MedlinePlus