{"id":314,"date":"2015-02-22T21:47:57","date_gmt":"2015-02-23T02:47:57","guid":{"rendered":"http:\/\/labdendro.uqar.ca\/?p=314"},"modified":"2015-03-07T11:06:10","modified_gmt":"2015-03-07T16:06:10","slug":"fire-overlaps-in-the-quebec-taiga-jessie-heon-m-sc","status":"publish","type":"post","link":"https:\/\/labdendro.uqar.ca\/en\/fire-overlaps-in-the-quebec-taiga-jessie-heon-m-sc\/","title":{"rendered":"Overlapping fires in the Qu\u00e9bec taiga, Jessie H\u00e9on M. Sc."},"content":{"rendered":"<p><span style=\"color: #333333;\">The objective of this projet was to understand\u00a0how successive fires overlap in the fire-prone, northern Qu\u00e9bec taiga. We tested\u00a0the widespread but poorly\u00a0documented idea that new\u00a0fires occur\u00a0independently of time since previous fire because fire activity is more strongly determined\u00a0by severe fire weather than through the postfire\u00a0recovery of forest fuels.<\/span><\/p>\n<div id=\"attachment_225\" style=\"width: 310px\" class=\"wp-caption alignleft\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-225\" class=\"wp-image-225 size-full\" src=\"http:\/\/labdendro.uqar.ca\/wp-content\/uploads\/2015\/02\/CicatriceTriple.jpg\" alt=\"CicatriceTriple\" width=\"300\" height=\"400\" srcset=\"https:\/\/labdendro.uqar.ca\/wp-content\/uploads\/2015\/02\/CicatriceTriple.jpg 300w, https:\/\/labdendro.uqar.ca\/wp-content\/uploads\/2015\/02\/CicatriceTriple-225x300.jpg 225w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><p id=\"caption-attachment-225\" class=\"wp-caption-text\"><span style=\"color: #333333;\">Figure 1: Cicatrices de feux multiples sur un pin gris de la ta\u00efga du Qu\u00e9bec. Le d\u00e9nombrement des cernes annuels de croissance permet de dater l&#8217;ann\u00e9e de chaque feu.<\/span><\/p><\/div>\n<p><span style=\"color: #333333;\">We have performed a detailed reconstruction of fire lengths and fire interval duration during the last 200 years over a 190-km section of the James Bay Road in northern Qu\u00e9bec. We have sampled more than 2000 fire scars on living and dead trees (Figure 1)\u00a0in order to obtain the year of past fires by couting\u00a0tree rings in fire-scarred stem cross-sections. We have detected several immense fires that crossed the road over more than 50 km during the dry years of\u00a01922, 1941, 1989 and 2013. The recurrence of large fires in association with severe fire weather suggests that fire activity is likely to increase with the anticipated climate warming.<\/span><\/p>\n<p><span style=\"color: #333333;\">However this potential increase in fire activity is not without limit. Time\u00a0intervals between successive fires have been much longer than expected under the assumption\u00a0that fires\u00a0occur independently of time since previous fire. This indicates that fire recurrence is also strongly influenced by the time available for postfire fuel recovery. The probability of fire occurrence increases with postfire time and stabilises after \u00a0about 50 years. This resistance of the boreal forest to high burn rates is thus especially effective is fire-prone regions where young forest stands are over-abundant.\u00a0We believe that this new knowledge will help us predict where the next large fires are likely to occur.<\/span><\/p>\n<p><span style=\"color: #333333;\">R\u00e9f\u00e9rence:<\/span><br \/>\n<span style=\"color: #333333;\"> H\u00e9on, J., D. Arseneault et M.-A. Parisien. 2014. Resistance of the boreal forest to high burn rates. Proceedings of the National Academy of Sciences of the USA, 111 : 13888-13893.<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>The objective of this projet was to understand\u00a0how successive fires overlap in the fire-prone, northern Qu\u00e9bec taiga. We tested\u00a0the widespread but poorly\u00a0documented idea that new\u00a0fires occur\u00a0independently of time since previous fire because fire activity&#46;&#46;&#46;<\/p>\n","protected":false},"author":1,"featured_media":224,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_locale":"en_US","_original_post":"222","footnotes":""},"categories":[1],"tags":[],"class_list":["post-314","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-recent-theses","en-US"],"_links":{"self":[{"href":"https:\/\/labdendro.uqar.ca\/wp-json\/wp\/v2\/posts\/314","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/labdendro.uqar.ca\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/labdendro.uqar.ca\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/labdendro.uqar.ca\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/labdendro.uqar.ca\/wp-json\/wp\/v2\/comments?post=314"}],"version-history":[{"count":17,"href":"https:\/\/labdendro.uqar.ca\/wp-json\/wp\/v2\/posts\/314\/revisions"}],"predecessor-version":[{"id":482,"href":"https:\/\/labdendro.uqar.ca\/wp-json\/wp\/v2\/posts\/314\/revisions\/482"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/labdendro.uqar.ca\/wp-json\/wp\/v2\/media\/224"}],"wp:attachment":[{"href":"https:\/\/labdendro.uqar.ca\/wp-json\/wp\/v2\/media?parent=314"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/labdendro.uqar.ca\/wp-json\/wp\/v2\/categories?post=314"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/labdendro.uqar.ca\/wp-json\/wp\/v2\/tags?post=314"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}