{"id":82035,"date":"2019-01-30T12:18:33","date_gmt":"2019-01-30T17:18:33","guid":{"rendered":"https:\/\/mrnf.gouv.qc.ca\/nos-publications\/scale-synchrony-spruce-budworm-population\/"},"modified":"2019-01-30T12:18:33","modified_gmt":"2019-01-30T17:18:33","slug":"scale-synchrony-spruce-budworm-population","status":"publish","type":"cpt_publication","link":"https:\/\/mrnf.gouv.qc.ca\/en\/our-publications\/scale-synchrony-spruce-budworm-population\/","title":{"rendered":"Bottom-up factors contribute to large-scale synchrony in spruce budworm populations"},"content":{"rendered":"\n<p>Published in <strong>Canadian Journal of Forest Research 48(3): 277-284. <a href=\"https:\/\/doi.org\/10.1139\/cjfr-2017-0051\" target=\"_blank\" rel=\"noopener noreferrer\">https:\/\/doi.org\/10.1139\/cjfr-2017-0051<\/a><\/strong><\/p>\n<p>Understanding the mechanisms that cause large-scale synchrony in insect population dynamics might yield key insights for predicting potential outbreak occurrence. Here, we evaluated which environmental factors best explain synchronous population fluctuations in the spruce budworm (<em>Choristoneura fumiferana<\/em> Clem.) (SBW), a major defoliator of coniferous forests in North America. SBW population levels were assessed with pheromone traps during the 1986\u20132014 period across a 625 000km<sup>2<\/sup> territory located in the province of Qu\u00e9bec (Canada). The populations were characterized by abundance fluctuations that were often synchronized across the whole study area. Interannual population fluctuations were correlated with host tree cone production (a source of food) and high May temperatures, suggesting that synchrony was influenced by food availability and phenological mismatch during shoot development. Cone production was itself correlated with low precipitation during the previous summer. This study indicates that bottom-up trophic factors can drive spatiotemporal synchrony in insect populations and contribute to explain important and sustained population increases during some years. We also suggest that several biological processes, all influenced by weather, are likely to interact to explain population synchrony during the different phases of the approximately 35 year SBW outbreak cycle, complicating the prediction of climate change effects on this insect.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Published in Canadian Journal of Forest Research 48(3): 277-284. https:\/\/doi.org\/10.1139\/cjfr-2017-0051 Understanding the mechanisms that cause large-scale synchrony in insect population dynamics might yield key insights for predicting potential outbreak occurrence. Here, we evaluated which environmental factors best explain synchronous population fluctuations in the spruce budworm (Choristoneura fumiferana Clem.) (SBW), a major defoliator of coniferous forests [&hellip;]<\/p>\n","protected":false},"template":"","format":"standard","cptt_secteur":[1179],"cptt_theme":[1185,1180,1181,1193],"cptt_categ_publi":[1149],"cptt_auteurs_ministeriels":[1070],"class_list":["post-82035","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_theme-tree-insects-and-diseases","cptt_categ_publi-scientific-article","cptt_auteurs_ministeriels-bouchard-m"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Bottom-up factors contribute to large-scale synchrony in spruce budworm populations - Minist\u00e8re des Ressources naturelles et des For\u00eats<\/title>\n<meta name=\"description\" content=\"We evaluated which environmental factors best explain synchronous population fluctuations in the spruce budworm, a major defoliator.\" \/>\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\/scale-synchrony-spruce-budworm-population\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Bottom-up factors contribute to large-scale synchrony in spruce budworm populations - 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