Allometric models for estimating above- and below-ground biomass in Amazonian forests at São Gabriel da Cachoeira in the upper Rio Negro, Brazil

Precise estimation of biomass at a regional scale is required for evaluating forest carbon stocks throughout the Amazon. We examined six types of allometric models to identify the best estimator of biomass in primary forests (terra firme) in the northwestern sector of the Brazilian Amazon. We also tested six regression models for estimating tree height. We developed each allometric model using measurements of 101 trees excavated in a primary forest distributed along the upper Rio Negro. A simple power function with stem diameter at breast height D as a single variable was selected as the best model for estimating each biomass component, i.e. above-ground total mass AGW, below-ground total mass BGW, and whole individual mass. Among models developed to estimate tree height H from D, we selected a regression model with a coefficient corresponding to an asymptotic height as the best fit. The D–BGW relationship at our site also differed significantly from that in the central Amazon. However, AGW–BGW relationships were consistent between the upper Rio Negro forest and other forests in the central Amazon, in that the BGW–AGW ratio was constant as 0.136 regardless of tree size. On the basis of D-based allometry and census data from 23 plots established in the upper Rio Negro region, we estimated a stand-level total biomass (dry mass) of 252.6Mgha −1 . This estimate is at least 73% lower than the potential stand biomass for the region previously suggested by several meta-analyses.

Bibliographic Details

Main Authors:	119174 Silva, Roseana Pereira da National Institute for Amazon Research. Tropical Forestry Deparment, 120996 Souza, Cacilda Adelia Sampaio de (autor/a) National Institute for Amazon Research. Tropical Forestry Deparment, 99567 Noguchi, Hideyuki (autor/a) Forestry and Forest Products Research Institute, 79974 Ishizuka, Moriyoshi (autor/a) Forestry and Forest Products Research Institute, 78016 Higuchi, Niro (autor/a) National Institute for Amazon Research. Tropical Forestry Deparment, 46899 Barros, Priscila Castro de (autor/a) National Institute for Amazon Research. Tropical Forestry Deparment, 122447 Suwa, Rempei (autor/a) Forestry and Forest Products Research Institute, 93109 Mello Ribeiro, Gabriel Henrique Pires de (autor/a) National Institute for Amazon Research. Tropical Forestry Deparment, 82086 Kajimoto, Takuya (autor/a) Forestry and Forest Products Research Institute, 116198 Santos, Joaquim dos (autor/a) National Institute for Amazon Research. Tropical Forestry Deparment, Nogueira Lima, Adriano José National Institute for Amazon Research. Tropical Forestry Department
Format:	Texto biblioteca
Language:	eng
Published:	Países Bajos Elsevier 2012
Subjects:	ALOMETRIA, MODELOS, BIOMASA, CARBONO, BOSQUE VIRGEN, ARBOLES, ALTURA, DIAMETRO A LA ALTURA DE PECHO, BIOMASA ABAJO DEL SUELO, BIOMASA AEREA, AMAZONIA, CAMBIO CLIMÁTICO, AGRICULTURA, CLIMATE CHANGE,
Online Access:	http://orton.catie.ac.cr/repdoc/A111311i/A11131i.pdf
Tags:	Add Tag No Tags, Be the first to tag this record!