Strong radial variation in wood density follows a uniform pattern in two neotropical rain forests.

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dc.careerCiencias Biológicases
dc.category.authorprincipalen_US
dc.contributor.authorValencia Reyes, Lius Renato
dc.contributor.correspondingHietz, Peter
dc.countryEcuadores
dc.date.accessioned2023-11-04T21:36:58Z
dc.date.available2023-11-04T21:36:58Z
dc.date.issued2013
dc.dedication.authorTCes
dc.description.abstractWood density (WD) affects plant biomechanics, drought and decay resistance. As a consequence, WD is an important functional trait related to plant demography and ecosystem processes, which is also used to estimate tree biomass. Radial variation in WD (changes from the centre of the stem to the cambium) affects the strength of the entire stem, but also reflects any changes in wood functional properties that might occur during a tree's lifetime. To understand how WD and radial WD gradients, which were defined as the slope of the relationship between WD and distance to the centre, are related to demographic traits of species, we investigated WD in 335 tree species from a Panamanian moist forest and 501 species from an Ecuadorian rain forest and radial density gradients in 118 and 186 species, respectively, and compared WD with tree growth, mortality and size. WD was negatively related to tree growth and mortality. WD tended to increase towards the outside in trees with low initial density and to decrease towards the outside in trees with high initial density. Radial WD gradients were largely unrelated to tree size and demographic traits, but some families had higher or lower WD gradients at a given inner WD. Inner WD was by far the best predictor of radial WD gradients (r2 = 0·39 for Panama and 0·45 for Ecuador) and this relationship was indistinguishable between the two rain forests. This suggests a broadly uniform function of WD variation, likely responding to mechanical requirements during ontogeny. We discuss the factors potentially driving radial increases or decreases in WD and suggest ways to elucidate the relative importance of tree mechanics, hydraulic safety or decay resistance. We also discuss that not accounting for radial WD gradients may result in substantial errors in WD of the whole stem and consequently biomass estimates, and recommend sampling density gradients when obtaining density data from tree cores.en_US
dc.facultyCiencias Exactas y Naturaleses
dc.id.author1706673199
dc.id.type1
dc.identifier.doi10.1111/1365-2435.12085
dc.identifier.issn02698463 - 13652435
dc.identifier.urihttps://repositorio.puce.edu.ec/handle/123456789/5563
dc.identifier.urihttp://onlinelibrary.wiley.com/doi/10.1111/1365-2435.12085/epdf
dc.indexed.databaseOtheres
dc.language.isoen
dc.list.authorsPeter Hietz, P., Valencia, R., Wright, J.
dc.magazine.pageRange684–692
dc.magazine.titleFunctional Ecologyen_US
dc.magazine.volumeChapter27
dc.rightsClosedAccessen
dc.statepublisheden_US
dc.subjectBiomass estimatees
dc.subjectBiomechanicses
dc.subjectPhylogenetic signales
dc.subjectRadial woodes
dc.subjectDensity gradientes
dc.subjectTropical rain forestes
dc.subjectWood functiones
dc.subjectBiomass estimate
dc.subjectBiomechanics
dc.subjectPhylogenetic signal
dc.subjectRadial wood
dc.subjectDensity gradient
dc.subjectTropical rain forest
dc.subjectWood function
dc.titleStrong radial variation in wood density follows a uniform pattern in two neotropical rain forests.en_US
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