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Assessment of aboveground carbon in a humid forest of Madagascar for better forest management at a local scale

XV World Forestry Congress, 2-6 May 2022

Copyright licence

Year of publication 2022

Place of publication Rome, Italy ;

Pages 12p.

Author Riana, H. A., Christophe, J., Herintsitohaina, R., et al.

Publisher FAO ;

Category Journal article

Synopsis (short abstract) Carbon quantification in tropical forests is vital for the successful implementation of climate mitigation activities including Reducing Emissions from Deforestation and Forest Degradation (REDD+) and for a better action plan for ecosystem management. Despite several studies in the aboveground carbon of Madagascar forests, studies at the local level are rare. This study, therefore, aims to assess the aboveground biomass (AGB) at the local level in Ankeniheny-Zahamena Forest Corridor (CAZ). Here, local allometric equations were developed to estimate AGB based from the destructive harvest of 54 trees. These equations are then applied to the 1800 trees inventoried in 28 study sites spread over four zones. Thereafter, the influence of climatic (temperature and precipitation) and topographical factors (altitude and slope) on the variability of AGB was analyzed. Hence, the sites were classified according to these two factors via hierachical ascending classification (HAC). Then, the effect of the two factors on the AGB was appreciated by analysis of the variances (ANOVA). The present study estimated aboveground carbon stock varying from 119, 55 ± 24, 11 Mg. ha - 1 to 176, 57 ± 51,91Mg. ha1 considering local equation EqCAZ3. The variability between AGB per zone were observed. The classification showed three bioclimatic classes. Then, climatic and topographic factors have significant effects at p-value 0, 05 on AGB. Furthermore, a significant contribution of biomass in DBH class ≥10cm (p-value <0,001) suggested the importance of growing and mature trees in carbon storage. Thus, the interest of this study was linked in improving and updating the quantification of the AGB in CAZ. These data are crucial to support the activities related to REDD + and to fight against degradation and deforestation. Priority of conservation and protection mainly in the area of Anjahamana by its favorable bioclimatic conditions was recommended. Keywords: aboveground biomass, allometric equation, degradation and deforestation, tropical rainforest, Madagascar ID: 3486668

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