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  • 1
    In: Global Change Biology, August 2014, Vol.20(8), pp.2644-2662
    Description: The ational orest oil nventory () provides the reenhouse as eporting in ermany with a quantitative assessment of organic carbon () stocks and changes in forest soils. Carbon stocks of the organic layer and the mineral topsoil (30 cm) were estimated on the basis of ca. 1.800 plots sampled from 1987 to 1992 and resampled from 2006 to 2008 on a nationwide grid of 8 × 8 km. Organic layer stock estimates were attributed to surveyed forest stands and land cover data. Mineral soil stock estimates were linked with the distribution of dominant soil types according to the oil ap of ermany (1 : 1 000 000) and subsequently related to the forest area. It appears that the pool of the organic layer was largely depending on tree species and parent material, whereas the pool of the mineral soil varied among soil groups. We identified the organic layer pool as stable although was significantly sequestered under coniferous forest at lowland sites. The mineral soils, however, sequestered 0.41 Mg C ha yr. Carbon pool changes were supposed to depend on stand age and forest transformation as well as an enhanced biomass input. Carbon stock changes were clearly attributed to parent material and soil groups as sandy soils sequestered higher amounts of , whereas clayey and calcareous soils showed small gains and in some cases even losses of soil . We further showed that the largest part of the overall sample variance was not explained by fine‐earth stock variances, rather by the concentrations variance. The applied uncertainty analyses in this study link the variability of strata with measurement errors. In accordance to other studies for entral urope, the results showed that the applied method enabled a reliable nationwide quantification of the soil pool development for a certain period.
    Keywords: C/N Ratio ; Carbon Sequestration ; Carbon Stocks ; Forest Stand Type ; Mineral Soil ; Nation Forest Soil Inventory ; Organic Layer ; Soil Groups ; Soil Organic Matter ; Soil Survey ; Tree Species ; Uncertainties
    ISSN: 1354-1013
    E-ISSN: 1365-2486
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  • 2
    Language: English
    In: Central European Forestry Journal, 01 June 2017, Vol.63(2-3), pp.105-112
    Description: Close to one third of Germany is forested. Forests are able to store significant quantities of carbon (C) in the biomass and in the soil. Coordinated by the Thünen Institute, the German National Forest Inventory (NFI) and the National Forest Soil Inventory (NFSI) have generated data to estimate the carbon storage capacity of forests. The second NFI started in 2002 and had been repeated in 2012. The reporting time for the NFSI was 1990 to 2006. Living forest biomass, deadwood, litter and soils up to a depth of 90 cm have stored 2500 t of carbon within the reporting time. Over all 224 t C ha-1 in aboveground and belowground biomass, deadwood and soil are stored in forests. Specifically, 46% stored in above-ground and below-ground biomass, 1% in dead wood and 53% in the organic layer together with soil up to 90 cm. Carbon stocks in mineral soils up to 30 cm mineral soil increase about 0.4 t C ha-1 yr-1 stocks between the inventories while the carbon pool in the organic layers declined slightly. In the living biomass carbon stocks increased about 1.0 t C ha-1 yr-1. In Germany, approximately 58 mill. tonnes of CO2 were sequestered in 2012 (NIR 2017).
    Keywords: Forests Ecosystems ; Soil ; Carbon Stocks ; Germany ; National Forests Inventory ; National Forests Soil Inventory
    ISSN: 2454034X
    E-ISSN: 2454-0358
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