Biotic and abiotic regulation of lightning fire initiation in the mixedwood boreal forest

Ecology
M A KrawchukR W Wein

Abstract

Lightning fire is the dominant natural disturbance of the western mixedwood boreal forest of North America. We quantified the independent effects of weather and forest composition on lightning fire initiation (a detected and recorded fire start) patterns in Alberta, Canada, to demonstrate how these biotic and abiotic components contribute to ecosystem dynamics in the mixedwood boreal forest. We used logistic regression to describe variation in annual initiation occurrence among 10,000-ha landscape units (voxels) covering a 9 million-ha study region over 11 years. At a voxel scale, forest composition explained more variation in annual initiation than did weather indices. Initiations occurred more frequently in landscapes with more conifer fuels (Picea spp.), and less in aspen-dominated (Populus spp.) ones. Initiations were less frequent in landscapes that had recently burned. Variation in initiation was also influenced by joint weather-lightning indices, but to a lesser degree. For each voxel, these indices quantified the number of days in the fire season when moisture levels were low and lightning was detected. Regional indices of fire weather severity explained substantial interannual variation of initiation, and the effect of...Continue Reading

References

May 15, 1997·Statistics in Medicine·D W HosmerS Lemeshow

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Citations

Nov 17, 2007·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·Anders Granström, Mats Niklasson
May 13, 2011·Ecology·Meg A Krawchuk, Max A Moritz
Jul 26, 2012·Ecological Applications : a Publication of the Ecological Society of America·Brian R SturtevantPeter T Wolter
Jun 7, 2011·Ecological Applications : a Publication of the Ecological Society of America·Marc-André ParisienMax A Moritz
Jul 20, 2013·Ecological Applications : a Publication of the Ecological Society of America·Yan BoulangerJacques Morissette
Mar 19, 2013·Ecological Applications : a Publication of the Ecological Society of America·Aurélie TerrierYves Bergeron
Apr 27, 2011·Ecological Applications : a Publication of the Ecological Society of America·Meg A Krawchuk, Steve G Cumming
Aug 9, 2008·Ecological Applications : a Publication of the Ecological Society of America·Jian YangStephen R Shifley
Aug 27, 2014·Risk Analysis : an Official Publication of the Society for Risk Analysis·Jessica R HaasMatthew P Thompson
Mar 10, 2015·The Science of the Total Environment·Zhiwei WuYu Liang
Feb 14, 2015·PloS One·Antonella De AngelisGianni Boris Pezzatti
Apr 9, 2017·Ecological Applications : a Publication of the Ecological Society of America·Neal J PastickJoseph F Knight
Dec 21, 2018·Global Change Biology·Sarah J HartJill F Johnstone
Apr 30, 2020·Risk Analysis : an Official Publication of the Society for Risk Analysis·José Ramón Rodríguez-PérezFernando Castedo-Dorado
Jan 1, 2014·Ecological Applications : a Publication of the Ecological Society of America·Marc-André ParisienMax A Moritz
Dec 28, 2017·Ecological Applications : a Publication of the Ecological Society of America·Sean A ParksLarry Scott Baggett

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