{"id":82841,"date":"2020-07-24T11:19:30","date_gmt":"2020-07-24T15:19:30","guid":{"rendered":"https:\/\/mrnf.gouv.qc.ca\/nos-publications\/holocene-dynamics-jack-pine-northern-range-limit\/"},"modified":"2020-07-24T11:19:30","modified_gmt":"2020-07-24T15:19:30","slug":"holocene-dynamics-jack-pine-northern-range-limit","status":"publish","type":"cpt_publication","link":"https:\/\/mrnf.gouv.qc.ca\/en\/our-publications\/holocene-dynamics-jack-pine-northern-range-limit\/","title":{"rendered":"The Holocene dynamics of jack pine at its northern range limit in Qu\u00e9bec"},"content":{"rendered":"\n<p>Published in <strong>Journal of Ecology 81: 719-727<\/strong><\/p>\n<p><strong>1<\/strong> The postglacial history of jack pine (<em>Pinus banksiana<\/em> Lamb.) at its northernmost distribution limit in the upper boreal forest, along the Grande Rivi\u00e8re de la Baleine (northern Qu\u00e9bec), was reconstructed by using radiocarbon-dated conifer macrofossils found in dune palaeosols.<\/p>\n<p><strong>2<\/strong> Black spruce (<em>Picea mariana<\/em> (Mill.) B.S.P.) was the first conifer species to colonize the area at 6000 <sub>BP<\/sub>, immediately after deglaciation. Jack pine first invaded the sandy terraces at 3050 <sub>BP<\/sub>, apparently at a low density. The species most likely survived for several centuries at this low density before experiencing a regional expansion between 2400 and 1750 <sub>BP<\/sub>.<\/p>\n<p><strong>3<\/strong> From the period of regional expansion of jack pine to the present, mixed and monospecific stands of jack pine and black spruce developed concurrently, indicating that both species responded positively to fire and climate conditions.<\/p>\n<p><strong>4<\/strong> The regional expansion of jack pine was not followed by a northward spread of the species into the forest tundra. The formation and expansion of the forest tundra during the last 3000 years restricted jack pine to the boreal forest. A lower fire frequency with colder conditions in the forest tundra may have been responsible for the inability of jack pine to expand northwards.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Published in Journal of Ecology 81: 719-727 1 The postglacial history of jack pine (Pinus banksiana Lamb.) at its northernmost distribution limit in the upper boreal forest, along the Grande Rivi\u00e8re de la Baleine (northern Qu\u00e9bec), was reconstructed by using radiocarbon-dated conifer macrofossils found in dune palaeosols. 2 Black spruce (Picea mariana (Mill.) B.S.P.) was [&hellip;]<\/p>\n","protected":false},"template":"","format":"standard","cptt_secteur":[1179],"cptt_theme":[1185,1180,1181],"cptt_categ_publi":[1149],"cptt_auteurs_ministeriels":[1076],"class_list":["post-82841","cpt_publication","type-cpt_publication","status-publish","format-standard","hentry","cptt_secteur-forests","cptt_theme-forest-ecology","cptt_theme-forestry-research","cptt_theme-forests","cptt_categ_publi-scientific-article","cptt_auteurs_ministeriels-desponts-mireille"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>The Holocene dynamics of jack pine at its northern range limit in Qu\u00e9bec - Minist\u00e8re des Ressources naturelles et des For\u00eats<\/title>\n<meta name=\"description\" content=\"Article about the Holocene dynamics of jack pine at its northern range limit in Qu\u00e9bec.\" \/>\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\/holocene-dynamics-jack-pine-northern-range-limit\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"The Holocene dynamics of jack pine at its northern range limit in Qu\u00e9bec - 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