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Pattern of xylem phenology in conifers of cold ecosystems at the Northern Hemisphere

Rossi Sergio, Anfodillo Tommaso, Čufar Katarina, Cuny Henri E., Deslauriers Annie, Fonti Patrick, Frank David, Gričar Jožica, Gruber Andreas, Huang Jian-Guo, Jyske Tuula, Kašpar Jakub, King Gregory, Krause Cornelia, Liang Eryuan, Mäkinen Harri, Morin Hubert, Nöjd Pekka, Oberhuber Walter, Prislan Peter, Rathgeber Cyrille B.K., Saracino Antonio, Swidrak Irene et Treml Václav. (2016). Pattern of xylem phenology in conifers of cold ecosystems at the Northern Hemisphere. Global Change Biology, 22, (11), p. 3804-3813.

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URL officielle: http://dx.doi.org/doi:10.1111/gcb.13317

Résumé

The interaction between xylem phenology and climate assesses forest growth and productivity and carbon storage across biomes under changing environmental conditions. We tested the hypothesis that patterns of wood formation are maintained unaltered despite the temperature changes across cold ecosystems. Wood microcores were collected weekly or biweekly throughout the growing season for periods varying between 1-13 years during 1998-2014 and cut in transverse sections for assessing the onset and ending of the phases of xylem differentiation. The dataset represented 1321 trees belonging to 10 conifer species from 39 sites in the Northern hemisphere and covering an interval of mean annual temperature exceeding 14 K. The phenological events and mean annual temperature of the sites were related linearly, with spring and autumnal events being separated by constant intervals across the range of temperature analysed. At increasing temperature, first enlarging, wall-thickening and mature tracheids appeared earlier, and last enlarging and wall-thickening tracheids occurred later. Overall, the period of wood formation lengthened linearly with the mean annual temperature, from 83.7 days at -2 °C to 178.1 days at 12 °C, at a rate of 6.5 days °C-1. April-May temperatures produced the best models predicting the dates of wood formation. Our findings demonstrated the uniformity of the process of wood formation and the importance of the environmental conditions occurring at the time of growth resumption. Under warming scenarios, the period of wood formation might lengthen synchronously in the cold biomes of the Northern hemisphere.

Type de document:Article publié dans une revue avec comité d'évaluation
ISSN:13541013
Volume:22
Numéro:11
Pages:p. 3804-3813
Version évaluée par les pairs:Oui
Date:2016
Identifiant unique:10.1111/gcb.13317
Sujets: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:cambium, cell differentiation, cell production, climate change, conifers, growth, meristem, secondary wall formation
Informations complémentaires:This is the peer reviewed version of the following article: Rossi S, Anfodillo T, Čufar K, Cuny HE, Deslauriers A, Fonti P, Frank D, Gričar J, Gruber A, Huang JG, Jyske T, Kašpar J, King G, Krause C, Liang E, Mäkinen H, Morin H, Nöjd P, Oberhuber W, Prislan P, Rathgeber CBK, Saracino A, Swidrak I et Treml V. 2016. Pattern of xylem phenology in conifers of cold ecosystems at the Northern Hemisphere. Global Change Biology, 22 : 3804-3813, which has been published in final form at http://dx.doi.org/doi:10.1111/gcb.13317. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.
Déposé le:19 avr. 2017 21:36
Dernière modification:19 avr. 2017 21:36
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