Stand Structure, Allometric Equations, Biomass and Carbon Sequestration Capacity of Acacia mangium Wild. (Mimosaceae) in Côte d’Ivoire

Abstract

In addition to bioenergy production, Acacia magium, a fast growing species, playsa major role in climate change mitigation through carbon sequestration fromthe atmosphere. The objective of this study was to improve estimates of ab-oveground biomass of 3, 7 and 11 years old stands of Acacia mangium set upthrough natural regeneration at Anguédédou in Côte d’Ivoire. Tree measurementswere done in circular plots of 615 m2 located at the center of each stand. 24trees of circumference at breast height (cbh) between 31 and 116 cm were felled,weighed and measured. Multiple linear regressions were used to develop allome-tric equations linking aboveground biomass of trees to cbh and/or height. Thecarbon stock and sequestration capacity of each stand was assessed using thesepredictive models. The average cbh was 39.4 cm, 73.5 cm and 91.4 cm respec-tively for 3, 7 and 11 years old stands with a density ranging between 845trees∙ha−1 and 553 trees∙ha−1. The allometric equations for biomass estimationwere Btotal aboveground = exp(−3.455 + 2.081 × ln(C)), Btrunk = exp (−5.153+ 1.681 × ln(C) + 1.056 × ln(H)), Bbranches = exp(−2.005 + 0.498 × ln(C2 ×H)), Bleaves = exp(−2.415 + 1.339 × ln(C)). Total height had no influence ontotal and leaf biomass but increased precision of trunk and branch biomass.The carbon sequestration capacity of aboveground biomass was highest in Aca-cia mangium stand of 7 years old with 45.14 teqCO2∙ha−1∙year−1 and lowest inthe 3-year stand with 33.90 teqCO2∙ha−1∙year−1. (2) (PDF) Stand Structure, Allometric Equations, Biomass and Carbon Sequestration Capacity of Acacia mangium Wild. (Mimosaceae) in Côte d'Ivoire. Available from: https://www.researchgate.net/publication/322103794_Stand_Structure_Allometric_Equations_Biomass_and_Carbon_Sequestration_Capacity_of_Acacia_mangium_Wild_Mimosaceae_in_Cote_d'Ivoire [accessed Aug 03 2022].