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Gewählte Master / Diploma Thesis:

Sigyel Delma (2011): Carbon Sequestration in a Fire Ecosystem in Eastern Bhutan.
Master / Diploma Thesis - Institut für Waldökologie (IFE), BOKU-Universität für Bodenkultur, pp 62. UB BOKU obvsg

Data Source: ZID Abstracts
The study aimed to assess the carbon sequestration potential of a Chir Pine (Pinus roxburghii) forest in eastern Bhutan. Chir Pine forests are frequently burned producing charred residues/black carbon, which are considered to be highly resistant to degradation and therefore a long term carbon sink. Plots of 32 m x 32 m size laid out adjacent to each other, were treated with different combinations of fire intensities and frequencies; low intensity low frequency (LILF), low intensity high frequency (LIHF), high intensity low frequency (HILF), high intensity high frequency (HIHF) in two replicates each, compared to a control (four replicates). Treatments were applied starting from 2004 onwards while the control was burned only in 2010. Biomass data were obtained by measuring all tree heights and diameters (including regeneration) and subsequent application of allometric functions, and sampling of ground vegetation. Soil samples were collected down to 100 cm from five pits in each plot and samples were pooled per horizon per plot. Soils were sieved through mesh size of < 2 mm, 1-2 mm, < 1 mm and charcoal was separated manually from each soil fraction. Standard Thermal Analysis (STA) was applied in addition for quantification and characterisation of charcoal in soil. C and N concentrations of fine soil were measured with a Leco TruSpecCN. Isotopic compositions of charcoal, litter and soil were measured by continuous-flow isotope ratio mass spectrometry (IRMS). Fire treatments differed significantly for biomass carbon with highest values in LIHF, while there was no significance difference between the fire treatments on charcoal and its carbon content, SOC and nitrogen stocks. The amount of char in the soil ranged from 0 to 0.6 Mg ha-1 and its carbon content from 0 to 0.4 Mg ha-1. The total carbon stock (Mg ha-1) of the study site was 47.3 ± 6.1 (mean +- SEE) with distribution in different components as 24 ± 2.6 in the biomass, 2 ± 0.0 in litter, 0.3 ± 0.0 in char and 21 ± 0.4 in the soil.

Beurteilende(r): Katzensteiner Klaus
1.Mitwirkender: Wriessnig Karin

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