{"id":82518,"date":"2019-01-30T12:14:19","date_gmt":"2019-01-30T17:14:19","guid":{"rendered":"https:\/\/mrnf.gouv.qc.ca\/?post_type=cpt_publication&#038;p=82518"},"modified":"2026-08-04T11:54:47","modified_gmt":"2026-08-04T15:54:47","slug":"natural-canopy-gap-disturbances","status":"publish","type":"cpt_publication","link":"https:\/\/mrnf.gouv.qc.ca\/en\/our-publications\/natural-canopy-gap-disturbances\/","title":{"rendered":"Natural canopy gap disturbances and their role in maintaining mixed-species forests of central Qu\u00e9bec, Canada"},"content":{"rendered":"\n<p>Published in <strong>Canadian Journal of Forest Research 37: 1534-1544<\/strong><\/p>\n<p>Until recently, natural dynamics of mixedwood stands have been largely ignored, resulting in the transformation of many North American mixedwoods into conifer- or hardwood-dominated stand types. The goal of this study was to examine canopy gap dynamics in balsam fir (<em>Abies balsamea<\/em> (L.) Mill.) &#8211; yellow birch (<em>Betula alleghaniensis<\/em> Britt.) mixedwoods to better understand possible mechanisms for species coexistence. Gap proportion in 12 study stands varied between 9% and 30% of the total stand area, while gap size varied from 20 to 2100 m<sup>2<\/sup>. Balsam fir mortality was the primary cause of gap formation. Balsam fir and mountain maple (<em>Acer spicatum<\/em> Lamb.) dominated the tree and shrub regeneration layers, respectively. Shrub competition slows the natural filling of gaps by tree species. Our results indicate that yellow birch is most abundant in gaps over 800 m<sup>2<\/sup> and balsam fir in those under 200 m<sup>2<\/sup>. Transition models showed that the greater longevity of yellow birch than balsam fir ensured its maintenance as a dominant. Dominant species coexistence thus results from divergent use of available resources through time and space. Forest management should maintain variability in harvest timing and size because the use of one gap size or a single rotation age will lead to an imbalance in species proportion relative to natural stands.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Published in Canadian Journal of Forest Research 37: 1534-1544 Until recently, natural dynamics of mixedwood stands have been largely ignored, resulting in the transformation of many North American mixedwoods into conifer- or hardwood-dominated stand types. The goal of this study was to examine canopy gap dynamics in balsam fir (Abies balsamea (L.) Mill.) &#8211; yellow [&hellip;]<\/p>\n","protected":false},"template":"","format":"standard","cptt_secteur":[1179],"cptt_theme":[1180,1181],"cptt_categ_publi":[1149],"cptt_auteurs_ministeriels":[1109],"class_list":["post-82518","cpt_publication","type-cpt_publication","status-publish","format-standard","hentry","cptt_secteur-forests","cptt_theme-forestry-research","cptt_theme-forests","cptt_categ_publi-scientific-article","cptt_auteurs_ministeriels-m-prevost"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Natural canopy gap disturbances and their role in maintaining mixed-species forests of central Qu\u00e9bec, Canada - Minist\u00e8re des Ressources naturelles et des For\u00eats<\/title>\n<meta name=\"description\" content=\"Natural canopy gap disturbances and their role in maintaining mixed-species forests of central Qu\u00e9bec, Canada\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/mrnf.gouv.qc.ca\/en\/our-publications\/natural-canopy-gap-disturbances\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Natural canopy gap disturbances and their role in maintaining mixed-species forests of central Qu\u00e9bec, Canada - 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