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Modeling decay rates of dead wood in a neotropical forest

Hérault Bruno, Beauchêne Jacques, Muller Félix, Wagner Fabien, Baraloto Christopher, Blanc Lilian, Martin Jean-Michel. 2010. Modeling decay rates of dead wood in a neotropical forest. Oecologia, 164 (1) : pp. 243-251.

Journal article ; Article de revue à facteur d'impact
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Quartile : Q1, Sujet : ECOLOGY

Liste HCERES des revues (en SHS) : oui

Thème(s) HCERES des revues (en SHS) : Psychologie-éthologie-ergonomie

Abstract : Variation of dead wood decay rates among tropical trees remains one source of uncertainty in global models of the carbon cycle. Taking advantage of a broad forest plot network surveyed for tree mortality over a 23-year period, we measured the remaining fraction of boles from 367 dead trees from 26 neotropical species widely varying in wood density (0.23-1.24 g cm-3) and tree circumference at death time (31.5-272.0 cm). We modeled decay rates within a Bayesian framework assuming a first order differential equation to model the decomposition process and tested for the effects of forest management (selective logging vs. unexploited), of mode of death (standing vs. downed) and of topographical levels (bottomlands vs. hillsides vs. hilltops) on wood decay rates. The general decay model predicts the observed remaining fraction of dead wood (R2 = 60%) with only two biological predictors: tree circumference at death time and wood specific density. Neither selective logging nor local topography had a differential effect on wood decay rates. Including the mode of death into the model revealed that standing dead trees decomposed faster than downed dead trees, but the gain of model accuracy remains rather marginal. Overall, these results suggest that the release of carbon from tropical dead trees to the atmosphere can be simply estimated using tree circumference at death time and wood density. (Résumé d'auteur)

Mots-clés Agrovoc : forêt tropicale, Bois mort, Dégradation, Biodétérioration, Cycle du carbone, Modèle mathématique, Mesure, Effet de serre, Dioxyde de carbone

Mots-clés géographiques Agrovoc : Guyane française

Classification Agris : P01 - Nature conservation and land resources
F40 - Plant ecology
K01 - Forestry - General aspects
U10 - Computer science, mathematics and statistics
F60 - Plant physiology and biochemistry

Champ stratégique Cirad : Axe 6 (2005-2013) - Agriculture, environnement, nature et sociétés

Auteurs et affiliations

  • Hérault Bruno, UAG (GUF) ORCID: 0000-0002-6950-7286
  • Beauchêne Jacques, CIRAD-ES-UMR Ecofog (GUF) ORCID: 0000-0003-4578-3670
  • Muller Félix
  • Wagner Fabien, CIRAD-ES-UMR Ecofog (GUF)
  • Baraloto Christopher, INRA (GUF)
  • Blanc Lilian, CIRAD-ES-UMR Ecofog (GUF)
  • Martin Jean-Michel

Source : Cirad - Agritrop (https://agritrop.cirad.fr/556946/)

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