BouloufDeslauriersRossi2012

Référence

Boulouf Lugo, J., Deslauriers, A. and Rossi, S. (2012) Duration of xylogenesis in black spruce lengthened between 1950 and 2010. Annals of Botany, 110(6):1099-1108. (Scopus )

Résumé

Background and AimsReconstructions have identified the 20th century as being uniquely warm in the last 1000 years. Changes in the phenology of primary meristems converged toward increases in length of the growing season. Has the phenology of secondary meristem changed during the last century, and to what extent?MethodsTimings of wood formation in black spruce, Picea mariana, were monitored for 9 years on a weekly timescale at four sites in the boreal forest of Quebec, Canada. Models for assessing xylem phenology were defined and applied to reconstruct onset, ending and duration of xylogenesis between 1950 and 2010 using thermal thresholds on chronologies of maximum and minimum temperatures.Key ResultsAll sites exhibited increasing trends of both annual and May-September temperatures, with the greatest changes observed at the higher latitudes. Phenological events in spring were more affected than those occurring in autumn, with cambial resumptions occurring 0·5-0·8 d decade-1 earlier. The duration of xylogenesis has lengthened significantly since 1950, although the models supplied wide ranges of variations, between 0·07 and 1·5 d decade-1, respectively.ConclusionsThe estimated changes in past cambial phenology demonstrated the marked effects of the recent increase in temperature on the phenological traits of secondary meristems. In the long run, the advancement of cambial activity could modify the short time window for growth of boreal species and dramatically affect the dynamics and productivity of trees in these temperature-limited ecosystems. © 2012 The Author 2012. Published by Oxford University Press on behalf of the Annals of Botany Company. All rights reserved. For Permissions, please email: journals.permissionsoup.com.

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@ARTICLE { BouloufDeslauriersRossi2012,
    AUTHOR = { Boulouf Lugo, J. and Deslauriers, A. and Rossi, S. },
    TITLE = { Duration of xylogenesis in black spruce lengthened between 1950 and 2010 },
    JOURNAL = { Annals of Botany },
    YEAR = { 2012 },
    VOLUME = { 110 },
    PAGES = { 1099-1108 },
    NUMBER = { 6 },
    NOTE = { cited By 11 },
    ABSTRACT = { Background and AimsReconstructions have identified the 20th century as being uniquely warm in the last 1000 years. Changes in the phenology of primary meristems converged toward increases in length of the growing season. Has the phenology of secondary meristem changed during the last century, and to what extent?MethodsTimings of wood formation in black spruce, Picea mariana, were monitored for 9 years on a weekly timescale at four sites in the boreal forest of Quebec, Canada. Models for assessing xylem phenology were defined and applied to reconstruct onset, ending and duration of xylogenesis between 1950 and 2010 using thermal thresholds on chronologies of maximum and minimum temperatures.Key ResultsAll sites exhibited increasing trends of both annual and May-September temperatures, with the greatest changes observed at the higher latitudes. Phenological events in spring were more affected than those occurring in autumn, with cambial resumptions occurring 0·5-0·8 d decade-1 earlier. The duration of xylogenesis has lengthened significantly since 1950, although the models supplied wide ranges of variations, between 0·07 and 1·5 d decade-1, respectively.ConclusionsThe estimated changes in past cambial phenology demonstrated the marked effects of the recent increase in temperature on the phenological traits of secondary meristems. In the long run, the advancement of cambial activity could modify the short time window for growth of boreal species and dramatically affect the dynamics and productivity of trees in these temperature-limited ecosystems. © 2012 The Author 2012. Published by Oxford University Press on behalf of the Annals of Botany Company. All rights reserved. For Permissions, please email: journals.permissionsoup.com. },
    AUTHOR_KEYWORDS = { boreal forest; cell differentiation; Picea mariana; threshold temperature; wood formation; xylogenesis },
    DOCUMENT_TYPE = { Article },
    DOI = { 10.1093/aob/mcs175 },
    KEYWORDS = { boreal forest; cell organelle; coniferous tree; dendrochronology; phenology; reconstruction; temperature profile; twentieth century; wood; xylem, air; article; biological model; cambium; Canada; cell differentiation; climate; cytology; growth, development and aging; meristem; season; spruce; temperature; time; tree; wood; xylem, Air; Cambium; Cell Differentiation; Climate; Meristem; Models, Biological; Picea; Quebec; Seasons; Temperature; Time Factors; Trees; Wood; Xylem, Canada; Quebec [Canada], Picea mariana },
    SOURCE = { Scopus },
    URL = { http://www.scopus.com/inward/record.url?eid=2-s2.0-84868028971&partnerID=40&md5=ee1752d4983ba49a378b930f6967a7e9 },
}

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