SplawinskiGreeneMichaletzEtAl2019

Référence

Splawinski, T.B., Greene, D.F., Michaletz, S.T., Gauthier, S., Houle, D. and Bergeron, Y. (2019) Position of cones within cone clusters determines seed survival in black spruce during wildfire. Canadian Journal of Forest Research, 49(2):121-127. (Scopus )

Résumé

It has recently become clear that the regeneration density of serotinous species within a burned area declines with local fire intensity. It is assumed that this occurs because variation in local fire intensity leads to variation in incident heat fluxes and, ultimately, seed necrosis. We argue here that this same relationship between incident heat flux and seed necrosis is important at the scale of individual plant crowns. Using Picea mariana (Mill.) B.S.P. (black spruce), we show that postfire seed viability increases with crown height, depth into the crown, and angle from wind direction (with the windward side enjoying greater viability). All three effects are what one would expect given the physics of buoyant plumes, interactions of moving fire lines with wake flow around cylinders, and heat transfer in porous bodies such as a tree crown. We conclude by discussing the broader consequences of cone cluster size and global change on regeneration in serotinous species. © 2019, Canadian Science Publishing. All rights reserved.

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@ARTICLE { SplawinskiGreeneMichaletzEtAl2019,
    AUTHOR = { Splawinski, T.B. and Greene, D.F. and Michaletz, S.T. and Gauthier, S. and Houle, D. and Bergeron, Y. },
    TITLE = { Position of cones within cone clusters determines seed survival in black spruce during wildfire },
    JOURNAL = { Canadian Journal of Forest Research },
    YEAR = { 2019 },
    VOLUME = { 49 },
    NUMBER = { 2 },
    PAGES = { 121-127 },
    NOTE = { cited By 0 },
    ABSTRACT = { It has recently become clear that the regeneration density of serotinous species within a burned area declines with local fire intensity. It is assumed that this occurs because variation in local fire intensity leads to variation in incident heat fluxes and, ultimately, seed necrosis. We argue here that this same relationship between incident heat flux and seed necrosis is important at the scale of individual plant crowns. Using Picea mariana (Mill.) B.S.P. (black spruce), we show that postfire seed viability increases with crown height, depth into the crown, and angle from wind direction (with the windward side enjoying greater viability). All three effects are what one would expect given the physics of buoyant plumes, interactions of moving fire lines with wake flow around cylinders, and heat transfer in porous bodies such as a tree crown. We conclude by discussing the broader consequences of cone cluster size and global change on regeneration in serotinous species. © 2019, Canadian Science Publishing. All rights reserved. },
    AFFILIATION = { Institut de recherche sur les forêts, Université du Québec en Abitibi-Témiscamingue, 445, boul. de l’Université, Rouyn-Noranda, QC J9X 5E4, Canada; Department of Forestry and Wildland Resources, Humboldt State University, 1 Harpst Street, Arcata, CA 95521-8299, United States; Department of Botany and Biodiversity Research Centre, University of British Columbia, Vancouver, BC V6T 1Z4, Canada; Biosphere 2 and Department of Ecology & Evolutionary Biology, University of Arizona, 1041 E Lowell St., BSW #310, Tucson, AZ 85721, United States; Natural Resources Canada, Canadian Forest Service, Laurentian Forestry Centre, 1055 rue du PEPS, P.O. Box 10380, Stn Sainte Foy, QC G1V 4C7, Canada; Ministère des Forêts, de la Faune et des Parcs, Direction de la recherché forestière, Québec, QC G1P 3W8, Canada; Ouranos Climate Change Consortium, Montréal, QC H3A 1B9, Canada; Centre d’étude sur la forêt and Chaire industrielle en aménagement forestier durable, Université du Québec à Montréal, CP 8888 Succursale A, Montréal, QC H3C 3P8, Canada },
    AUTHOR_KEYWORDS = { Abscission; Cone clustering; Establishment; Fire; Picea mariana; Seed viability },
    DOCUMENT_TYPE = { Article },
    DOI = { 10.1139/cjfr-2018-0209 },
    SOURCE = { Scopus },
    URL = { https://www.scopus.com/inward/record.uri?eid=2-s2.0-85061371029&doi=10.1139%2fcjfr-2018-0209&partnerID=40&md5=f2aefa00b1f804196888dd355e431f20 },
}

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