{"id":82846,"date":"2019-01-30T12:11:58","date_gmt":"2019-01-30T17:11:58","guid":{"rendered":"https:\/\/mrnf.gouv.qc.ca\/nos-publications\/holocene-record-aeolian-fire-activity-northern-quebec\/"},"modified":"2019-01-30T12:11:58","modified_gmt":"2019-01-30T17:11:58","slug":"holocene-record-aeolian-fire-activity-northern-quebec","status":"publish","type":"cpt_publication","link":"https:\/\/mrnf.gouv.qc.ca\/en\/our-publications\/holocene-record-aeolian-fire-activity-northern-quebec\/","title":{"rendered":"The late Holocene record of aeolian and fire activity in northern Qu\u00e9bec, Canada"},"content":{"rendered":"\n<p>Published in <strong>The Holocene 1(3): 201-208<\/strong><\/p>\n<p>A set of 196 <sup>14<\/sup>C dates was used to reconstruct Late Holocene aeolian activity in the Hudson Bay area along a south-north transect crossing the northern boreal forest, the forest tundra and the shrub tundra zones. The record indicates a minor period of aeolian activity between 4650 and 4050 BP, and three major periods at 3650-2750 BP and after 700 BP. In the northern boreal forest, there was little temporal variation in dune activity, except around 1300-950 BP where a major peak of activity is recorded. In the forest tundra, two major peaks of activity are recorded between 1650-950 BP and after 700 BP. Only minor activity occured in the shrub tundra during the last 4000 <sup>14<\/sup>C-yr and some aeolian events appear to have been slightly out-of-phase compared to the two other zones. Most dates were obtained from non-charred material in the shrub tundra where, unlike in the Subarctic, the aeolian activity responded to a triggering process unconnected with fire.<\/p>\n<p>The dune record is compared with that of gelifluction activity in snowpatch environments and with a detailed fire chronology derived from radiocarbon-dated conifer charcoal sampled in present-day treeless sites of the forest tundra. Post-fire gelifluction reached a maximum around 1500-1100 BP and 750 BP. Fire activity was also at a maximum after 2000 BP in the forest tundra. The similarity of the chronologies suggests that fires occurring during cold periods of the late Holocene were catastrophic, having a significant impact on soil erosion and deforestation.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Published in The Holocene 1(3): 201-208 A set of 196 14C dates was used to reconstruct Late Holocene aeolian activity in the Hudson Bay area along a south-north transect crossing the northern boreal forest, the forest tundra and the shrub tundra zones. The record indicates a minor period of aeolian activity between 4650 and 4050 [&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-82846","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 late Holocene record of aeolian and fire activity in northern Qu\u00e9bec, Canada - Minist\u00e8re des Ressources naturelles et des For\u00eats<\/title>\n<meta name=\"description\" content=\"Article about the late Holocene record of aeolian and fire activity in northern 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-record-aeolian-fire-activity-northern-quebec\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"The late Holocene record of aeolian and fire activity in northern Qu\u00e9bec, Canada - 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