{"id":82208,"date":"2019-01-30T12:14:55","date_gmt":"2019-01-30T17:14:55","guid":{"rendered":"https:\/\/mrnf.gouv.qc.ca\/nos-publications\/effects-spruce-budworm-outbreak\/"},"modified":"2019-01-30T12:14:55","modified_gmt":"2019-01-30T17:14:55","slug":"effects-spruce-budworm-outbreak","status":"publish","type":"cpt_publication","link":"https:\/\/mrnf.gouv.qc.ca\/en\/our-publications\/effects-spruce-budworm-outbreak\/","title":{"rendered":"Effects of a spruce budworm outbreak on element export below the rooting zone: a case study for a balsam fir forest"},"content":{"rendered":"\n<p>Published in <strong>Annals of Forest Science <\/strong><b>66: 707 https:\/\/doi.org\/10.1051\/forest\/2009057<\/b><\/p>\n<p>Spruce budworm outbreaks are among the major natural disturbances affecting the dynamics and functioning of Canadian boreal forests. However, the element losses potentially associated with spruce budworm outbreaks have not been quantified.<\/p>\n<p>We evaluated the influence of spruce budworm outbreaks on nutrient export from boreal forest soils by comparing nutrient leaching losses during a spruce budworm outbreaks episode (1981\u20131984) to an unperturbed period (1999\u20132003) in a calibrated catchment located in a balsam fir forest.<\/p>\n<p>Nutrient soil leaching losses were significantly higher during the spruce budworm outbreaks (1981\u20131984) for N-NO<sub>3<\/sub> (30.1 fold), K (8.3 fold), N-NH<sub>4<\/sub> (6.2 fold), Mg (2.7 fold) and SO<sub>4<\/sub> (2.2 fold), as compared to an unperturbed period (1999\u20132003). When the recurrence of spruce budworm outbreaks (33 years) and a plausible average length of such events (5 years) are taken into consideration, it is estimated that in the long term, 5.6 more NO<sub>3<\/sub>, 1.5 more K and 1.2 more NH<sub>4<\/sub> are leached from the soil profile during outbreaks.<\/p>\n<p>The important leaching losses during spruce budworm outbreaks, when added to the losses due to tree harvesting and fire (and acid deposition for K), may have considerable effects on soil fertility and ecosystem sustainability.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Published in Annals of Forest Science 66: 707 https:\/\/doi.org\/10.1051\/forest\/2009057 Spruce budworm outbreaks are among the major natural disturbances affecting the dynamics and functioning of Canadian boreal forests. However, the element losses potentially associated with spruce budworm outbreaks have not been quantified. We evaluated the influence of spruce budworm outbreaks on nutrient export from boreal forest [&hellip;]<\/p>\n","protected":false},"template":"","format":"standard","cptt_secteur":[1179],"cptt_theme":[1183,1185,1180,1181],"cptt_categ_publi":[1149],"cptt_auteurs_ministeriels":[1082,1091],"class_list":["post-82208","cpt_publication","type-cpt_publication","status-publish","format-standard","hentry","cptt_secteur-forests","cptt_theme-ecosystems-and-environment","cptt_theme-forest-ecology","cptt_theme-forestry-research","cptt_theme-forests","cptt_categ_publi-scientific-article","cptt_auteurs_ministeriels-duchesne-louis","cptt_auteurs_ministeriels-d-houle"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Effects of a spruce budworm outbreak on element export below the rooting zone: a case study for a balsam fir forest - Minist\u00e8re des Ressources naturelles et des For\u00eats<\/title>\n<meta name=\"description\" content=\"Spruce budworm outbreaks are among the major natural disturbances affecting the dynamics and functioning of Canadian boreal forests.\" \/>\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\/effects-spruce-budworm-outbreak\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Effects of a spruce budworm outbreak on element export below the rooting zone: a case study for a balsam fir forest - 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