Improved allometric models to estimate the aboveground biomass of tropical trees - Université de Montpellier Accéder directement au contenu
Article Dans Une Revue Global Change Biology Année : 2014

Improved allometric models to estimate the aboveground biomass of tropical trees

Jérôme Chave
Alberto Búrquez
  • Fonction : Auteur
Emmanuel Chidumayo
  • Fonction : Auteur
Matthew Colgan
  • Fonction : Auteur
Welington B.C. Delitti
  • Fonction : Auteur
Tron Eid
  • Fonction : Auteur
Philip Fearnside
  • Fonction : Auteur
Rosa Goodman
  • Fonction : Auteur
Matieu Henry
  • Fonction : Auteur
Angelina Martínez-Yrízar
  • Fonction : Auteur
Wilson Mugasha
  • Fonction : Auteur
Helene Muller-Landau
  • Fonction : Auteur
Maurizio Mencuccini
Bruce Nelson
Euler Nogueira
  • Fonction : Auteur
Edgar Ortiz-Malavassi
Casey Ryan
  • Fonction : Auteur
Juan Saldarriaga
  • Fonction : Auteur

Résumé

Terrestrial carbon stock mapping is important for the successful implementation of climate change mitigation policies. Its accuracy depends on the availability of reliable allometric models to infer oven-dry aboveground biomass of trees from census data. The degree of uncertainty associated with previously published pantropical aboveground biomass allometries is large. We analyzed a global database of directly harvested trees at 58 sites, spanning a wide range of climatic conditions and vegetation types (4004 trees ≥ 5 cm trunk diameter). When trunk diameter, total tree height, and wood specific gravity were included in the aboveground biomass model as co-variates, a single model was found to hold across tropical vegetation types, with no detectable effect of region or environmental factors. The mean percent bias and variance of this model was only slightly higher than that of locally fitted models. Wood specific gravity was an important predictor of aboveground biomass, especially when including a much broader range of vegetation types than previous studies. The generic tree diameter-height relationship depended linearly on a bioclimatic stress variable E, which compounds indices of temperature variability, precipitation variability and drought intensity. For cases in which total tree height is unavailable for aboveground biomass estimation, a pantropical model incorporating wood density, trunk diameter and the variable E outperformed previously published models without height. However, to minimize bias, the development of locally derived diameter-height relationships is advised whenever possible. Both new allometric models should contribute to improve the accuracy of biomass assessment protocols in tropical vegetation types, and to advancing our understanding of architectural and evolutionary constraints on woody plant development.

Dates et versions

hal-02063299 , version 1 (11-03-2019)

Identifiants

Citer

Jérôme Chave, Maxime Réjou-Méchain, Alberto Búrquez, Emmanuel Chidumayo, Matthew Colgan, et al.. Improved allometric models to estimate the aboveground biomass of tropical trees. Global Change Biology, 2014, 20 (10), pp.3177-3190. ⟨10.1111/gcb.12629⟩. ⟨hal-02063299⟩
820 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More