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Allometric equations for estimating biomass and carbon stocks in afforested open woodlands with black spruce and jack pine, in the Eastern Canadian boreal forest

Fradette Olivier, Marty Charles, Tremblay Pascal, Lord Daniel et Boucher Jean-François. (2021). Allometric equations for estimating biomass and carbon stocks in afforested open woodlands with black spruce and jack pine, in the Eastern Canadian boreal forest. Forests, 12, (1), p. 59.

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Allometric equations use easily measurable biometric variables to determine the aboveground and belowground biomasses of trees. Equations produced for estimating the biomass within Canadian forests at a large scale have not yet been validated for eastern Canadian boreal open woodlands (OWs), where trees experience particular environmental conditions. In this study, we harvested 167 trees from seven boreal OWs in Quebec, Canada for biomass and allometric measurements. These data show that Canadian national equations accurately predict the whole aboveground biomass for both black spruce and jack pine trees, but underestimated branches biomass, possibly owing to a particular tree morphology in OWs relative to closed-canopy stands. We therefore developed ad hoc allometric equations based on three power models including diameter at breast height (DBH) alone or in combination with tree height (H) as allometric variables. Our results show that although the inclusion of H in the model yields better fits for most tree compartments in both species, the difference is minor and does not markedly affect biomass C stocks at the stand level. Using these newly developed equations, we found that carbon stocks in afforested OWs varied markedly among sites owing to differences in tree growth and species. Nine years after afforestation, jack pine plantations had accumulated about five times more carbon than black spruce plantations (0.14 vs. 0.80 t C·ha−1), highlighting the much larger potential of jack pine for OW afforestation projects in this environment.

Type de document:Article publié dans une revue avec comité d'évaluation
Pages:p. 59
Version évaluée par les pairs:Oui
Identifiant unique:10.3390/f12010059
Sujets:Sciences naturelles et génie > Sciences appliquées > Eau et environnement
Sciences naturelles et génie > Sciences appliquées > Foresterie et sciences du bois
Sciences naturelles et génie > Sciences naturelles > Biologie et autres sciences connexes
Département, module, service et unité de recherche:Départements et modules > Département des sciences fondamentales
Mots-clés:allometric equations, black spruce, Picea mariana, jack pine, Pinus banksiana, boreal forest, open woodland, afforestation, carbon sequestration, équation allométrique, épinette noire, pin gris, forêt boréale, forêt ouverte, boisement, séquestration du carbone
Déposé le:21 janv. 2021 23:24
Dernière modification:21 janv. 2021 23:24
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Creative Commons LicenseSauf indication contraire, les documents archivés dans Constellation sont rendus disponibles selon les termes de la licence Creative Commons "Paternité, pas d'utilisation commerciale, pas de modification" 2.5 Canada.

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