top of page
Development of allometric equations for estimating above-ground liana biomass in tropical primary and secondary forests Malaysia
Addo-Fordjour P; Rahmad ZB
International Journal of Ecology
The study developed allometric equations for estimating liana stem and total above-ground biomass in primary and secondary forests in the Penang National Park Penang Malaysia. Using biomass-diameter-length data of 60 liana individuals representing 15 species allometric equations were developed for liana stem biomass and total above-ground biomass (TAGB). Three types of allometric equations were developed: models fitted to untransformed weighted and log-transformed (log10) data. There was a significant linear relationship between biomass and the predictors (diameter length and/or their combinations). The same set of models was developed for primary and secondary forests due to absence of differences in regression line slopes of the forests (ANCOVA:). The coefficients of determination values of the models were high (stem: 0.861 to 0.990; TAGB: 0.900 to 0.992). Generally log-transformed models showed better fit (Furnival\\\s index FI < 0.50) than the other models (FI > 0.5). A comparison of the best TAGB model in this study (based on FI) with previously published equations indicated that most of the equations significantly overestimated TAGB of lianas. However a previous equation from Southeast Asia estimated TAGB similar to that of the current equation. Therefore regional or intracontinental equations should be preferred to intercontinental equations when estimating liana biomass.
bottom of page