Aboveground biomass allometric equations and distribution of carbon stocks of the African oak ( Afzelia africana Sm.) in
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ORIGINAL PAPER
Aboveground biomass allometric equations and distribution of carbon stocks of the African oak (Afzelia africana Sm.) in Burkina Faso Larba Hubert Balima1,2 • Blandine Marie Ivette Nacoulma2 • Philippe Bayen2 Kangbe´ni Dimobe2,3 • Franc¸ois N’Guessan Kouame´1 • Adjima Thiombiano2
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Received: 20 November 2018 / Accepted: 31 January 2019 The Author(s) 2019
Abstract The significant role of tropical forest ecosystems in the global carbon budget has increased the need for accurate estimates of tropical forest biomass. The lack of large-scale biomass allometric equations hampers the understanding of the spatial distribution of tree biomass and carbon stocks and their influencing factors in West Africa. This study aimed to develop allometric equations to estimate aboveground biomass of African oak (Afzelia africana Sm.) in Burkina Faso and to analyze factors affecting the variability of tree biomass and carbon storage. Sixty individual trees were destructively sampled in four protected areas along two climatic zones. In each climatic zone, log–log models were tested and fitted to each aboveground biomass component and to the total
Project funding: The project was fully funded by the German Federal Ministry of Education and Research (BMBF) through the West African Science Service Centre on Climate Change and Adapted Land Use (WASCAL) program. The online version is available at http://www.springerlink.com Corresponding editor: Zhu Hong. & Larba Hubert Balima [email protected] 1
West African Science Service Centre on Climate Change and Adapted Land Use (WASCAL), Graduate Research Program on Climate Change and Biodiversity, UFR Biosciences, University Fe´lix Houphou¨et Boigny, B.P. 165, Abidjan 31, Coˆte d’Ivoire
2
Department of Plant Biology and Physiology, Laboratory of Plant Biology and Ecology, University Ouaga 1, Pr. Joseph Ki-Zerbo, 03 B.P. 7021, Ouagadougou 03, Burkina Faso
3
Laboratory of Botany and Plant Ecology, Department of Botany, University of Lome´, B.P. 1515, Lome´, Togo
aboveground biomass. Carbon content in tree aboveground components was evaluated using the ash method. All validated equations showed good fit and performance with high explained variance. Allometric equations differed between the Sudano-sahelian zone and the Sudanian zone, except for leaf biomass equations. Both biomass allocation and carbon content varied significantly between tree components but not between climatic zones. Carbon content in tree components followed the patterns of biomass allocation with branches accounting for the highest proportion. In the two climatic zones, carbon contents were 50.18–52.62% for leaves, 54.78–54.94% for stems and 54.96–55.99% for branches. Dry biomass ranged from 509.05 to 765.56 kg tree-1 at site level and from 620.21 to 624.48 kg tree-1 along climatic zones. Carbon content varied from 53.90% in the Sudano-sahelian zone to 54.39% in the Sudanian zone. This study indicated that climate does not influence aboveground biomass production and carbon sequestration of Afzelia a
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