ALLOMETRIC EQUATION FOR ESTIMATING HIGHLAND BAMBOO (Oldeania alpina (K. SCHUM.) STAPLETON) CARBON POOLS ALONG ALTITUDINAL GRADIENTS: THE CASE OF GARAMBA FOREST, SOUTHERN ETHIOPIA

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Abstract:

Due to a lack of species-site-specific models, information about the carbon (C) stock potential of highland bamboo in various carbon pools is limited. Thus, the objective of this study was to develop an allometric equation for estimating highland bamboo C pools along altitudinal gradients in Garamba forest, southern Ethiopia. Using a systematic design approach, 34 plots were chosen and placed along a transect in the altitude range. Then, bamboo culm diameter at breast height (DBH), height (H) and number of culms were collected. A total of 102 soil samples were collected to determine the soil bulk density and soil organic carbon (SOC) from three different depth classes. A composite 17 litter samples were collected. Besides, a total of 102 bamboo culms covering the full range of sizes were destructively sampled. A subsample of bamboo biomass components and litter were taken to the laboratory to determine the C content. Allometric equations in the form of power models were formulated for all age groups of bamboo by evaluating the statistical relationships of measurable variables (DBH and H) and dry total biomass (TB). The best models were validated by leave-one-out cross-validation procedures and results were compared based on model performance statistics. The data analysis was performed using R software. The result of the study showed significant (p

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ALLOMETRIC EQUATION FOR ESTIMATING HIGHLAND BAMBOO (Oldeania alpina (K. SCHUM.) STAPLETON) CARBON POOLS ALONG ALTITUDINAL GRADIENTS: THE CASE OF GARAMBA FOREST, SOUTHERN ETHIOPIA

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