BouchardRegniereTherrien2018

Référence

Bouchard, M., Régnière, J., Therrien, P. (2018) Bottom-up factors contribute to large-scale synchrony in spruce budworm populations1. Canadian Journal of Forest Research, 48(3):277-284. (Scopus )

Résumé

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 in North America. SBW population levels were assessed with pheromone traps during the 1986–2014 period across a 625 000 km2 territory located in the province of Québec (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. © 2018, Published by NRC Research Press.

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@ARTICLE { BouchardRegniereTherrien2018,
    AUTHOR = { Bouchard, M. and Régnière, J. and Therrien, P. },
    TITLE = { Bottom-up factors contribute to large-scale synchrony in spruce budworm populations1 },
    JOURNAL = { Canadian Journal of Forest Research },
    YEAR = { 2018 },
    VOLUME = { 48 },
    NUMBER = { 3 },
    PAGES = { 277-284 },
    NOTE = { cited By 2 },
    ABSTRACT = { 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 in North America. SBW population levels were assessed with pheromone traps during the 1986–2014 period across a 625 000 km2 territory located in the province of Québec (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. © 2018, Published by NRC Research Press. },
    AFFILIATION = { Direction de la Recherche Forestière, Ministère des Forêts, de la Faune et des Parcs du Québec, 2700 rue Einstein, Québec, QC, Canada; Natural Resources Canada, Canadian Forest Service, Laurentian Forestry Centre, P.O. Box 10380 Stn. Ste Foy, Québec, QC, Canada; Direction de la Protection des Forêts, Ministère des Forêts, de la Faune et des Parcs du Québec, 2700 rue Einstein, Québec, QC, Canada },
    AUTHOR_KEYWORDS = { Boreal forests; Mast years; Phenology; Population synchrony; Spruce budworm },
    DOCUMENT_TYPE = { Article },
    DOI = { 10.1139/cjfr-2017-0051 },
    SOURCE = { Scopus },
    URL = { https://www.scopus.com/inward/record.uri?eid=2-s2.0-85042697904&doi=10.1139%2fcjfr-2017-0051&partnerID=40&md5=880e84a7726f7861751dd079b836e996 },
}

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