Height-diameter allometric equations of an emergent tree species from the Congo Basin

Reliable tree height-diameter (H-D) allometric equations are a key tool for the estimation of forest productivity and Above Ground Biomass (AGB). Most existing H-D developed tropical region based on large-scale multi-species datasets, their use to derive information AGB at species level is prone uncertainties. The single-species available mainly focused monocultures or stands with simple mixtures did not account site effects. Here we measured height diameter 2,288 trees emergent Pericopsis elata (Harms) Meeuwen in Democratic Republic Congo (DRC) Cameroon. We first examined how accurate multispecies predicting total P. elata. then tested whether vary between sites. equation stand-level environmental variables induce changes relationship regional level. additionally evaluated tree-level important local where climate stand development stage expected be less variable. found that pantropical, significantly underestimate Yangambi showed highest underestimation all studied This result supports need an specific species-level significant underestimations from disturbed undisturbed forests DRC, while overestimations were observed similar sites Using mixed-effect equation, even within single species, substantial variation exists driven by differences maximum asymptotic (Hmax) taller attain higher Hmax DRC than basal area covariate accounting effects regional-scale minor However, local-scale, none significant. Local-scale associated light availability, highlighting potential management options shape environment driving productivity.