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Title: Height-diameter allometry of tropical forest trees
Authors: Feldpausch, Ted R.
Banin, Lindsay F.
Phillips, Oliver L.
Baker, Timothy R.
Lewis, Simon L.
Quesada, Carlos Alberto
Affum-Baffoe, Kofi
Arets, Eric J.M.M.
Berry, Nicholas J.
Bird, Michael I.
Brondízio, Eduardo Sonnewend
Camargo, Plínio Barbosa de
Chave, Jérôme
Djagbletey, Gloria Djaney
null, Tomas
Drescher, Michael
Fearnside, Philip Martin
França, Mabiane Batista
Fyllas, Nikolaos M.
Lopez-Gonzalez, Gabriela
Hladik, Annette
Higuchi, Niro
Hunter, Maria O.
Iida, Yoshiko
Salim, Kamariah Abu
Kassim, Abd Rahman
Keller, Michael
Kemp, Jeanette E.
King, David A.
Lovett, Jon C.
Marimon, Beatriz Schwantes
Marimon Júnior, Ben Hur
Lenza, Eddie
Marshall, Andrew Robert
Metcalfe, Daniel J.
Mitchard, Edward T.A.
Morán, Emilio Federico
Nelson, Bruce Walker
Nilus, Reuben
Nogueira, Euler Melo
Palace, Michael W.
Patiño, Sandra
Peh, Kelvin S.H.
Raventos, M. T.
Reitsma, Jan M.
Saiz, Gustavo
Schrodt, Franziska
Sonké, Bonaventure
Taedoumg, Hermann E.
Tan, Sylvester Kheng San
White, Lee J.T.
Wöll, Hannsjörg
Lloyd, Jon
Keywords: Aboveground Biomass
Air Temperature
Akaike Information Criterion
Geographical Region
Tropical Forest
Vegetation Structure
Amazon Basin
Guyana Shield
Issue Date: 2011
metadata.dc.publisher.journal: Biogeosciences
metadata.dc.relation.ispartof: Volume 8, Número 5, Pags. 1081-1106
Abstract: Tropical tree height-diameter (<i>H:D</i>) relationships may vary by forest type and region making large-scale estimates of above-ground biomass subject to bias if they ignore these differences in stem allometry. We have therefore developed a new global tropical forest database consisting of 39 955 concurrent <i>H</i> and <i>D</i> measurements encompassing 283 sites in 22 tropical countries. Utilising this database, our objectives were: <br><br> 1. to determine if <i>H:D</i> relationships differ by geographic region and forest type (wet to dry forests, including zones of tension where forest and savanna overlap). <br><br> 2. to ascertain if the <i>H:D</i> relationship is modulated by climate and/or forest structural characteristics (e.g. stand-level basal area, <i>A</i>). <br><br> 3. to develop <i>H:D</i> allometric equations and evaluate biases to reduce error in future local-to-global estimates of tropical forest biomass. <br><br> Annual precipitation coefficient of variation (<i>P</i>V), dry season length (<i>S</i>D), and mean annual air temperature (<i>T</i>A) emerged as key drivers of variation in <i>H:D</i> relationships at the pantropical and region scales. Vegetation structure also played a role with trees in forests of a high <i>A</i> being, on average, taller at any given <i>D</ i>. After the effects of environment and forest structure are taken into account, two main regional groups can be identified. Forests in Asia, Africa and the Guyana Shield all have, on average, similar <i>H:D</i> relationships, but with trees in the forests of much of the Amazon Basin and tropical Australia typically being shorter at any given <i>D</i> than their counterparts elsewhere. The region-environment-structure model with the lowest Akaike's information criterion and lowest deviation estimated stand-level <i>H</i> across all plots to within amedian &minus;2.7 to 0.9% of the true value. Some of the plot-to-plot variability in <i>H:D</i> relationships not accounted for by this model could be attributed to variations in soil physical conditions. Other things being equal, trees tend to be more slender in the absence of soil physical constraints, especially at smaller <i>D</i>. Pantropical and continental-level models provided less robust estimates of <i>H</i>, especially when the roles of climate and stand structure in modulating <i>H:D</i> allometry were not simultaneously taken into account. © 2011 Author(s).
metadata.dc.identifier.doi: 10.5194/bg-8-1081-2011
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