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<datestamp>2018-01-11</datestamp>
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<title lang=en>Wood specific gravity variations within tree trunk: the case study of Legumes representatives in French Guiana</title>
<creator>Lehnebach, Romain</creator>
<creator>Morel, H.</creator>
<creator>Amusant, Nadine</creator>
<creator>Griffon, Sébastien</creator>
<creator>Barczi, Jean-François</creator>
<creator>Beauchene, Jacques</creator>
<creator>Nicolini, Eric, </creator>
<contributor>Ecologie des forêts de Guyane (ECOFOG) ; Centre de Coopération Internationale en Recherche Agronomique pour le Développement (CIRAD) - Institut National de la Recherche Agronomique (INRA) - Université des Antilles et de la Guyane (UAG) - AgroParisTech - Université de Guyane (UG) - Centre National de la Recherche Scientifique (CNRS)</contributor>
<contributor>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 [Montpellier] (INRA Montpellier) - Université de Montpellier (UM) - Centre National de la Recherche Scientifique (CNRS) - Institut de Recherche pour le Développement (IRD [France-Sud])</contributor>
<description>International audience</description>
<source>Wood sciences underpinning tropical ecology and management. International closing symposium of the XYLAREDD project.</source>
<coverage>Tervuren, Belgium</coverage>
<identifier>hal-01188894</identifier>
<identifier>https://hal-sde.archives-ouvertes.fr/hal-01188894</identifier>
<source>https://hal-sde.archives-ouvertes.fr/hal-01188894</source>
<source>Wood sciences underpinning tropical ecology and management. International closing symposium of the XYLAREDD project., May 2015, Tervuren, Belgium</source>
<language>en</language>
<subject lang=en>Wood Specific Gravity</subject>
<subject lang=en>Tropical tree species</subject>
<subject lang=en>Biomass estimation</subject>
<subject lang=en>successional status</subject>
<subject lang=en>Xplo software</subject>
<subject>[SDE.BE] Environmental Sciences/Biodiversity and Ecology</subject>
<type>info:eu-repo/semantics/conferenceObject</type>
<type>Conference papers</type>
<description lang=en>Over the past decade, much attention has been devoted to the development of forest biomass estimation methods at a stand scale, leading to the establishment of allometric models (Chave et al., 2014). These allometric equations use a unique wood specific gravity value (WSG) per species, but neglect the within tree variations of WSG found by others (Wiemann & Williamson, 1989).The main objectives of this study are (1) to illustrate the diversity of radial (from pith to bark) and longitudinal (from bottom to top) patterns of WSG variation within and between species, (2) to highlight different trends of WSG radial variations and the possible misinterpretations of these trends due to the effect of heartwood and (3) to link these variations and patterns to the successional status of the species (from pioneer to sciaphilic species).We sampled 33 small trees (10<DBH<15cm) at the Paracou field station in French Guiana, belonging to 14 Legumes species, and to different ecological groups according to light. WSG radial profiles were measured at 3 heights along the trunk, and 2 heights along the crown, of each tree.We observed different radial and longitudinal patterns of WSG variation. Pioneer and heliophilic species show both radial and longitudinal increases in WSG, while shade-tolerant and sciaphilic species show the reverse pattern. Hemi-tolerant species show an intermediate pattern, with WSG increasing radially, but decreasing or increasing longitudinally. Decreasing radial pattern in sciaphilic species is due to the presence of heartwood relatively denser than sapwood. When a corrected WSG is used, sciaphilic species show the same radial pattern as hemi-tolerant species (i.e. increasing) or no radial pattern (i.e. ‘flat’ from pith to bark).Decreasing WSG from bottom to top is a general case, excepted for species with low WSG (i.e pioneers). All studied species tend to the same range of WSG values with height (~ 0.6-0.9), supported by a higher WSG under bark within trunk.We also developed a biomass model, implemented under Xplo software (Griffon et al., 2011) to infer trunk biomass from WSG profiles, allowing comparisons of both single- and varying-WSG models.Wood specific gravity variations within tree trunk: the case study of Legumes representatives in French Guiana.</description>
<date>2015-05-26</date>
</dc>
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