Improved allometric models to estimate the aboveground biomass of tropical trees
2014
Chave, Jérôme | Réjou-Méchain, Maxime | Búrquez, Alberto | Chidumayo, Emmanuel | Colgan, Matthew | Delitti, Welington B.C. | Duque, Alvaro | Eid, Tron | Fearnside, Philip | Goodman, Rosa | Henry, Matieu | Martínez-Yrízar, Angelina | Mugasha, Wilson | Muller-Landau, Helene | Mencuccini, Maurizio | Nelson, Bruce | Ngomanda, Alfred | Nogueira, Euler | Ortiz-Malavassi, Edgar | Pelissier, Raphaël | Ploton, Pierre | Ryan, Casey | Saldarriaga, Juan | Vieilledent, Ghislain | Evolution et Diversité Biologique (EDB) ; Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) ; Communauté d'universités et établissements de Toulouse (Comue de Toulouse)-Communauté d'universités et établissements de Toulouse (Comue de Toulouse)-Centre National de la Recherche Scientifique (CNRS) | Institut Français de Pondichéry (IFP) ; Ministère de l'Europe et des Affaires étrangères (MEAE)-Centre National de la Recherche Scientifique (CNRS) | Departamento de Ciencias Forestales ; Universidad Nacional de Colombia | School of Geosciences [Edinburgh] ; The University of Edinburgh | Institut des Sciences de l'Evolution de Montpellier (UMR ISEM) ; Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-École Pratique des Hautes Études (EPHE) ; Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université de Montpellier (UM)-Institut de recherche pour le développement [IRD] : UR226-Centre National de la Recherche Scientifique (CNRS) | Botanique et Modélisation de l'Architecture des Plantes et des Végétations (UMR AMAP) ; Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut National de la Recherche Agronomique (INRA)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD [Occitanie]) | Biens et services des écosystèmes forestiers tropicaux : l'enjeu du changement global (UPR BSEF) ; Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad) | CNES (TOSCA program) | IRD project PPR FTH‐AC ‘Changement globaux, biodiversité et santé en zone forestière d'Afrique Centrale' | BRIDGE project | ANR-10-LABX-0025,CEBA,CEnter of the study of Biodiversity in Amazonia(2010) | ANR-11-IDEX-0002,UNITI,Université Fédérale de Toulouse(2011)
International audience
اظهر المزيد [+] اقل [-]إنجليزي. 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.
اظهر المزيد [+] اقل [-]الكلمات المفتاحية الخاصة بالمكنز الزراعي (أجروفوك)
المعلومات البيبليوغرافية
تم تزويد هذا السجل من قبل Institut national de la recherche agronomique