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Climatic influences on wood anatomy and tree-ring features of Great Basin conifers at a new mountain observatory

Ziaco Emanuele, Biondi Franco, Rossi Sergio et Deslauriers Annie. (2014). Climatic influences on wood anatomy and tree-ring features of Great Basin conifers at a new mountain observatory. Applications in Plant Sciences, 2, (10),

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URL officielle: http://dx.doi.org/doi:10.3732/apps.1400054

Résumé

Premise of the study: A network of mountain observing stations has been installed in the Great Basin of North America. NevCAN (Nevada Climate-ecohydrological Assessment Network), which spans a latitudinal range of 2.5° and two elevation ranges of about 2000 m each, enabled us to investigate tree growth in relation to climate.

Methods: We analyzed wood anatomy and tree-ring characteristics of four conifer species in response to different levels of water availability by comparing a low- and a high-elevation population. Chronologies of earlywood and latewood widths, as well as cellular parameters, were developed from the year 2000 to 2012.

Results: At the southern (drier and warmer) sites, Pinus monophylla had smaller cell lumen, tracheid diameter, and cell wall thickness. Pinus monophylla and P. flexilis showed bigger cellular elements at the higher elevations, whereas the opposite pattern was found in Picea engelmannii and Pinus longaeva. When all species and sites were pooled together, stem diameter was positively related with earlywood anatomical parameters.

Discussion: We have provided a glimpse of the applications that NevCAN, as a new scientific tool, could allow in the general field of botany. In particular, we were able to investigate how differences in water stress related to elevation lead to changes in xylem anatomy.

Type de document:Article publié dans une revue avec comité d'évaluation
ISSN:2168-0450
Volume:2
Numéro:10
Version évaluée par les pairs:Oui
Date:2014
Sujets: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:elevation-latitude gradients, NevCAN, Picea engelmannii, pinus flexilis, pinus longaeva, pinus monophylla, tracheid size
Déposé le:06 juin 2016 15:50
Dernière modification:05 déc. 2016 20:44
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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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