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Diameter of lodgepole pine and mortality caused by the mountain pine beetle

factors that influece the relationship and their applicability for susceptibility rating

Björklund, Niklas and Lindgren, B. Staffan (2009). Diameter of lodgepole pine and mortality caused by the mountain pine beetle. Canadian journal of forest research. 39 :5 , 908-916
[Research article]

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Official URL: http://dx.doi.org/10.1139/X09-020


During outbreaks the mountain pine beetle (Dendroctonus ponderosae Hopkins) kills large lodgepole pine trees (Pinus contorta Dougl. ex Loud.) more frequently than smaller ones. There is, however, considerable variation in the relation of diameter to incidence of attack. In a meta-analysis of published data we found that the relationship was primarily determined by geographic location (elevation, latitude, and longitude). We propose a new tree mortality measure, the probability of death index, defined as the average percentage of mortality for trees>23cm. The index may improve the precision in predictive modeling of tree mortality, as it provides a biologically relevant measure of mortality, since it only includes trees that contribute to the growth of an epidemic and is not influenced by the number of trees within a diameter class. To be useful to forest managers, it must be possible to predict the index from stand parameters that are easily measured. The usefulness of the index was supported by a meta-analysis, which showed that 53% of the variation in the mortality index was explained by geographic location. Tree density did not explain any additional variation. Future research is needed to evaluate the performance of the probability of death index compared with that of other mortality measures.

Authors/Creators:Björklund, Niklas and Lindgren, B. Staffan
Title:Diameter of lodgepole pine and mortality caused by the mountain pine beetle
Subtitle:factors that influece the relationship and their applicability for susceptibility rating
Series Name/Journal:Canadian journal of forest research
Year of publishing :2009
Page range:908-916
Publisher:NRC Research Press
Additional Information:doi: 10.1139/X09-020 Copyright National Research Council of Canada NRC Research Press Electronic Journals Copyright No part of the NRC Research Press electronic journals may be reproduced, stored, or transmitted in any form or by any means, without the written permission of the publisher, except as stated below. Under the Canadian Copyright Act, individuals may download or print single copies of articles for personal research or study. Any person may reproduce short excerpts from articles in the journals for any purpose that respects the moral rights of authors, provided that the source is fully acknowledged. As a courtesy, the consent of authors of such material should be obtained directly from the author. Authorization to reproduce items for other than personal research or study, as stated above, may be obtained via Access © upon payment of the copyright fee of $10.00 per copy. NRC Research Press also extends certain additional rights to authors. (see Authors' Rights) The above rights do not extend to copying or reproduction for general distribution, for advertising or promotional purposes, for creating new collective works, or for resale. For such copying or reproduction, arrangements must be made with NRC Research Press.
Publication Type:Research article
Full Text Status:Public
Subjects:Obsolete subject words > FORESTRY, AGRICULTURAL SCIENCES and LANDSCAPE PLANNING > Plant production > Forestry
Keywords:Mountain pine beetle, Susceptibility rating, The probability of death index, Meta-analysis, Meta analysis
Permanent URL:
ID Code:4520
Department:(NL, NJ) > Dept. of Ecology
(S) > Dept. of Ecology
Deposited By: Niklas Björklund
Deposited On:08 Feb 2010 00:00
Metadata Last Modified:02 Dec 2014 10:31

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