Species-specific biomass allometric models and expansion factors for indigenous and planted forests of the Mozambique highlands  

作　　者：Tarquinio Mateus Magalhaes Victoria Norberto Cossa Benard Soares Guedes Amélia Saraiva Monguela Fanheiro 

机构地区：[1]Departamento de Engenharia Florestal,Faculdade de Agronomia e Engenharia Florestal,Universidade Eduardo Mondlane,Campus Universitário,Edifício no.1,257,Maputo,República de Mocambique [2]Departamento de Sociologia Rural,Escola Superior de Desenvolvimento Rural,Universidade Eduardo Mondlane,Vilankulo,República de Mocambique

出　　处：《Journal of Forestry Research》2021年第3期1047-1065,共19页林业研究（英文版）

基　　金：funded partly by the Swedish International Cooperation Agency(SIDA)。

摘　　要：Secondary Miombo woodlands and forest plantations occupy increasing areas in Mozambique,the former due to anthropogenic activities.Plantations,mainly species of Eucalyptus and Pinus,are being established on sites previously covered by secondary Miombo woodlands.This affects the evolution,cycle and spatiotemporal patterns of carbon(C)storage and stocks in forest ecosystems.The estimation of C storage,which is indispensable for formulating climate change policies on sequestrating CO_(2),requires tools such as biomass models and biomass conversion and expansion factors(BCEF).In Mozambique,these tools are needed for both indigenous forests and plantations.The objective of this study is to fit species-specific allometric biomass models and BCEF for exotic and indigenous tree species.To incorporate efficient inter-species variability,biomass equations were fitted using nonlinear mixed-effects models.All tree component biomass models had good predictability;however,better predictive accuracy and ability was observed for the 2-predictors biomass model with tree height as a second predictor.The majority of the variability in BCEF was explained by the variation in tree species.Miombo species had larger crown biomass per unit of stem diameter and stored larger amounts of biomass per stem volume.However,due to relatively rapid growth,larger stem diameters,heights,and stand density,the plantations stored more biomass per tree and per unit area.

关 键 词：Biomass allometry Biomass partitioning MIOMBO Exotic forest plantations Brachystegia spiciformis Julbernardia globifl ora Eucalyptus PINUS 

分 类 号：S718.5[农业科学—林学]