Wood density variations of legume trees in French Guiana along the shade tolerance continuum: Heartwood effects on radial patterns and gradients
| Autor: | Jacques Beauchêne, Hélène Morel, Romain Lehnebach, Nadine Amusant, Stéphanie Va, Julie Bossu, Eric-André Nicolini |
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| Přispěvatelé: | 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 [France-Sud]), Ecologie des forêts de Guyane (UMR ECOFOG), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut National de la Recherche Agronomique (INRA)-AgroParisTech-Université de Guyane (UG)-Centre National de la Recherche Scientifique (CNRS)-Université des Antilles (UA), Département Environnements et Sociétés (Cirad-ES), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad), Département Systèmes Biologiques (Cirad-BIOS), ANR-10-LABX-0025,CEBA,CEnter of the study of Biodiversity in Amazonia(2010), European Project: FEDER, ANR-10-LABX-25-01/10-LABX-0025,CEBA,CEnter of the study of Biodiversity in Amazonia(2010), Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Institut National de la Recherche Agronomique (INRA)-Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut de Recherche pour le Développement (IRD [France-Sud]), Université des Antilles (UA)-Université de Guyane (UG)-Centre National de la Recherche Scientifique (CNRS)-AgroParisTech-Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut National de la Recherche Agronomique (INRA) |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
0106 biological sciences
legumes Continuum (design consultancy) F62 - Physiologie végétale - Croissance et développement forêt tropicale Atmospheric sciences 01 natural sciences F50 - Anatomie et morphologie des plantes heartwood extractives Shade tolerance Legume Biomass (ecology) Forestry Fabaceae [SDV.BV.BOT]Life Sciences [q-bio]/Vegetal Biology/Botanics French Guiana Accroissement du diamètre Habit (biology) Pith Tree species Woody plant densité du bois sapwood Bois de coeur Biology Arbre 010603 evolutionary biology shade tolerance Bois de réaction wood density variations growth–mortality rate lcsh:QK900-989 15. Life on land tropical tree species K10 - Production forestière Ombrage growth-mortality rate lcsh:Plant ecology [SDE.BE]Environmental Sciences/Biodiversity and Ecology heartwood 010606 plant biology & botany |
| Zdroj: | Forests Forests, 2019, 10 (2), pp.80. ⟨10.3390/f10020080⟩ Forests, MDPI, 2019, 10 (2), pp.80. ⟨10.3390/f10020080⟩ Forests, Vol 10, Iss 2, p 80 (2019) Volume 10 Issue 2 |
| ISSN: | 1999-4907 |
| DOI: | 10.3390/f10020080⟩ |
| Popis: | International audience; Increasing or decreasing wood density (WD) from pith to bark is commonly observed in tropical tree species. The different types of WD radial variations, long been considered to depict the diversity of growth and mechanical strategies among forest guilds (heliophilic vs. shade-tolerant), were never analyzed in the light of heartwood (HW) formation. Yet, the additional mass of chemical extractives associated to HW formation increases WD and might affect both WD radial gradient (i.e., the slope of the relation between WD and radial distance) and pattern (i.e., linear or nonlinear variation). We studied 16 legumes species from French Guiana representing a wide diversity of growth strategies and positions on the shade-tolerance continuum. Using WD measurements and available HW extractives content values, we computed WD corrected by the extractive content and analyzed the effect of HW on WD radial gradients and patterns. We also related WD variations to demographic variables, such as sapling growth and mortality rates. Regardless of the position along the shade-tolerance continuum, correcting WD gradients reveals only increasing gradients. We determined three types of corrected WD patterns: (1) the upward curvilinear pattern is a specific feature of heliophilic species, whereas (2) the linear and (3) the downward curvilinear patterns are observed in both mid- and late-successional species. In addition, we found that saplings growth and mortality rates are better correlated with the corrected WD at stem center than with the uncorrected value: taking into account the effect of HW extractives on WD radial variations provides unbiased interpretation of biomass accumulation and tree mechanical strategies. Rather than a specific feature of heliophilic species, the increasing WD gradient is a shared strategy regardless of the shade tolerance habit. Finally, our study stresses to consider the occurrence of HW when using WD |
| Databáze: | OpenAIRE |
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