LecomteSimardBergeron2006

Reference

Lecomte, N., Simard, M., Bergeron, Y. (2006) Effects of fire severity and initial tree composition on stand structuraldevelopment in the coniferous boreal forest of northwestern Quebec,Canada. Ecoscience, 13(2):152-163.

Abstract

The effects of fire severity and initial post-fire tree compositionon long-term stand structural development were investigated in thePicea mariana - feathermoss bioclimatic domain of northwestern Que?bec.Paleoecological methods were used to categorize the severity ofthe last fire (high or low) and initial tree composition (Piceamariana versus Pinus banksiana). Changes in stand structure wereevaluated by quantifying stand structural attributes along threechronosequences. Except for accelerating stand break-up, the post-firepresence of P. banksiana (which is eventually replaced by P. mariana)had little effect on stand structural development. Fire severityhad significant effects on the evolution of stand structural attributes,with low severity fires being particularly detrimental for standproductivity. Stands colonizing low severity fires were characterizedby low post-fire tree recruitment and growth and remained open throughoutsuccession. In contrast, after high severity fires, dense productivestands were rapidly established regardless of tree composition andgradually became open as succession proceeded. These results suggestthat in the prolonged absence of fire, the different stand structuraldevelopment pathways gradually converge regardless of fire severityor initial composition. We argue that stand structural diversitywithin the coniferous boreal forest is a result of the severityof the last fire and of processes operating at the stand scale inthe absence of fire.

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@ARTICLE { LecomteSimardBergeron2006,
    AUTHOR = { Lecomte, N. and Simard, M. and Bergeron, Y. },
    TITLE = { Effects of fire severity and initial tree composition on stand structuraldevelopment in the coniferous boreal forest of northwestern Quebec,Canada },
    JOURNAL = { Ecoscience },
    YEAR = { 2006 },
    VOLUME = { 13 },
    PAGES = { 152-163 },
    NUMBER = { 2 },
    ABSTRACT = { The effects of fire severity and initial post-fire tree compositionon long-term stand structural development were investigated in thePicea mariana - feathermoss bioclimatic domain of northwestern Que?bec.Paleoecological methods were used to categorize the severity ofthe last fire (high or low) and initial tree composition (Piceamariana versus Pinus banksiana). Changes in stand structure wereevaluated by quantifying stand structural attributes along threechronosequences. Except for accelerating stand break-up, the post-firepresence of P. banksiana (which is eventually replaced by P. mariana)had little effect on stand structural development. Fire severityhad significant effects on the evolution of stand structural attributes,with low severity fires being particularly detrimental for standproductivity. Stands colonizing low severity fires were characterizedby low post-fire tree recruitment and growth and remained open throughoutsuccession. In contrast, after high severity fires, dense productivestands were rapidly established regardless of tree composition andgradually became open as succession proceeded. These results suggestthat in the prolonged absence of fire, the different stand structuraldevelopment pathways gradually converge regardless of fire severityor initial composition. We argue that stand structural diversitywithin the coniferous boreal forest is a result of the severityof the last fire and of processes operating at the stand scale inthe absence of fire. },
    KEYWORDS = { Black spruce Chronosequence Clay belt Forest succession Jack pineNatural disturbances Picea mariana Pinus banksiana Residual soilorganic matter Stand structure },
    OWNER = { brugerolles },
    TIMESTAMP = { 2007.12.04 },
}

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