Article
Biodiversity Conservation
Bastien Bellemin-Noel, Stephane Bourassa, Emma Despland, Louis De Grandpre, Deepa S. Pureswaran
Summary: Global warming can lead to phenological shifts that accelerate the development of eastern spruce budworm larvae and advance their pupation and budburst on black spruce and balsam fir. However, under higher temperatures, black spruce may become more susceptible to infestations, resulting in similar success rates for the budworm on both black spruce and balsam fir.
GLOBAL CHANGE BIOLOGY
(2021)
Article
Agronomy
Anoj Subedi, Philippe Marchand, Yves Bergeron, Hubert Morin, Miguel Montoro Girona
Summary: Current ecological models predict that climate change will have significant effects on the natural disturbances of forests. The spruce budworm, a major defoliating insect in eastern North America, has a major impact on the Canadian boreal forest. Little is known about how climate fluctuations affect the growth of the spruce budworm host species during outbreaks.
AGRICULTURAL AND FOREST METEOROLOGY
(2023)
Article
Biochemistry & Molecular Biology
Simon Legault, Julian Wittische, Michel Cusson, Jacques Brodeur, Patrick M. A. James
Summary: The study revealed evidence of panmixia and high genetic connectivity for two important species of spruce budworm parasitoids in boreal forests, indicating similar effective dispersal during outbreaks and high population densities between outbreaks. Additionally, a significant negative relationship between genetic diversity and latitude was found for one species but not the other, suggesting potential differences in northern range limits within the parasitoid community. These spatial dynamics should be considered when predicting future insect outbreak severities in boreal landscapes.
Article
Forestry
Zelin Liu, Changhui Peng, David A. MacLean, Louis De Grandpre, Jean-Noel Candau, Daniel Kneeshaw
Summary: The impact of early intervention strategy (EIS) and foliage protection strategy (FP) on forest carbon (C) dynamics during spruce budworm outbreaks is still unclear. This study found that applying FP in the areas with the greatest potential C losses resulted in a greater reduction in cumulative net ecosystem productivity (NEP) than a higher proportion of FP. Successful implementation of EIS for 12 years can maintain more forest C than FP applied everywhere. The effectiveness of treatments during spruce budworm outbreaks depends on forest species, age, and their interactions.
Article
Entomology
Simon Legault, Patrick M. A. James
Summary: Hyperparasitism plays an important role in regulating forest ecosystems. It can either facilitate pest outbreaks or stabilize food web fluctuations. Our study examined the spatial variations in hyperparasitism associated with the spruce budworm and found that it is influenced by forest genus diversity. Further monitoring hyperparasitism can provide new insights into the impact of forest composition on multitrophic interactions and outbreak dynamics.
ENVIRONMENTAL ENTOMOLOGY
(2023)
Article
Forestry
Jacques Regniere, Jean-Claude Thireau, Remi Saint-Amant, Veronique Martel
Summary: This study developed a model to investigate the interactions of A. interrupta with two hosts, finding that the number of generations and growth rate of the parasitoid vary geographically.
Article
Ecology
Janie Lavoie, Miguel Montoro Girona, Guillaume Grosbois, Hubert Morin
Summary: The study found that seedlings in black spruce-balsam fir stands experienced twice the defoliation compared to those in pure black spruce stands, and seedlings in clear-cutting plots had higher defoliation levels than those in partial cutting stands. The severity of defoliation varied depending on stand types, silvicultural treatments, species, and seedling height.
Article
Forestry
Cristian Corona, Abigail C. Leeper, Jalene M. LaMontagne
Summary: Eastern spruce budworm is a native defoliating insect in Canada and the United States, with different impacts on balsam fir and white spruce. A study of an outbreak in Wisconsin showed higher defoliation and mortality in white spruce, contrary to expectations.
FOREST ECOLOGY AND MANAGEMENT
(2022)
Article
Ecology
Cassy Berguet, Maxence Martin, Dominique Arseneault, Hubert Morin
Summary: This study reconstructs the spatiotemporal dynamics of spruce budworm outbreaks in southern Quebec during the 20th century, identifying three outbreaks with different severity and duration patterns. The severity and duration of outbreaks are mainly influenced by the abundance of balsam fir, the main host species, and different climatic conditions.
FRONTIERS IN ECOLOGY AND EVOLUTION
(2021)
Article
Forestry
Jacques Regniere, Remi Saint-Amant, Jean-Claude Thireau, Pierre Therrien, Christian Hebert, Veronique Martel
Summary: The article develops temperature-driven models to describe the seasonal interactions between parasitoids and hosts, exploring the impact of climate on their spatiotemporal biology. It predicts the performance of parasitoids in response to temperature affecting seasonal development of hosts, with spatial variations and improved performance under climate change in the northern portion of its range.
Article
Ecology
Catherine Chagnon, Mathieu Bouchard, David Pothier
Summary: Forest logging has contributed to the decline of woodland caribou populations, and the outbreaks of spruce budworm have worsened habitat alterations. The defoliation caused by spruce budworms has a negative impact on the woodland caribou population, increasing predation risk and limiting their populations in managed forests.
ECOLOGY AND EVOLUTION
(2022)
Article
Materials Science, Paper & Wood
Wassim Kharrat, Roger. E. Hernandez, Claudia. B. Caceres
Summary: The study investigated the impact of tip path overlap on the quality of debarking black spruce logs, both unfrozen and frozen. Power, energy consumption, and torque were also measured. The experiment involved debarking logs with three overlaps (8%, 27%, and 43%) at two different temperatures (-12°C and +20°C). The results show that the amount of bark remaining on the log decreased and the proportion of wood in bark residues increased as the tip path overlap increased. The study provides valuable information to enhance debarking quality with efficient energy use within the specified parameters.
WOOD MATERIAL SCIENCE & ENGINEERING
(2023)
Article
Ecology
Shawn J. Leroux, Louis Charron, Luise Hermanutz, Janet Feltham
Summary: This study examined the combined effects of ungulate herbivory and spruce budworm disturbance on balsam fir forest regeneration, finding a strong negative impact of budworm disturbance on adult tree density and indirect effects on seedling and sapling density through adult tree density. The results suggest cumulative and interactive effects of both disturbances negatively affecting the regeneration of balsam fir forests.
FUNCTIONAL ECOLOGY
(2021)
Article
Ecology
Vincent Nealis, Jacques Regniere
Summary: A study on outbreak populations of western spruce budworm in Douglas-fir forests in British Columbia found that factors influencing population density changes included generation survival, larval survival, and dispersal of moths. Of particular importance were the survival rates of small, non-feeding larval stages, feeding larvae, and pupal stages. The differential in adult densities among locations in outbreak areas resulted in greater per-capita egg recruitment to areas of lower density, leading to apparent synchrony and extended duration of outbreaks.
Article
Mathematics, Applied
Ahmadjan Muhammadhaji, Azhar Halik
Summary: In this study, a class of delayed spruce budworm population model is investigated, considering both autonomous and nonautonomous cases. By utilizing inequality techniques, continuation theorem, and the construction of suitable Lyapunov functional, the researchers establish a set of easily verifiable sufficient conditions on the permanence, existence, and global attractivity of positive periodic solutions for the system. An example and numerical simulation are provided to illustrate the main results.
JOURNAL OF FUNCTION SPACES
(2021)
Article
Entomology
Darragh Ennis, Emma Despland, Fei Chen, Pat Forgione, Eric Bauce
Article
Entomology
Roberto Quezada-Garcia, Alvaro Fuentealba, Eric Bauce
Article
Forestry
Jonathan Boucher, Andre Beaudoin, Christian Hebert, Luc Guindon, Eric Bauce
INTERNATIONAL JOURNAL OF WILDLAND FIRE
(2017)
Article
Ecology
Alvaro Fuentealba, Deepa Pureswaran, Eric Bauce, Emma Despland
Article
Forestry
Alvaro Fuentealba, Solene Sagne, Deepa Pureswaran, Eric Bauce, Emma Despland
CANADIAN JOURNAL OF FOREST RESEARCH
(2018)
Article
Ecology
Claudia Mendez-Espinoza, Genevieve J. Parent, Patrick Lenz, Andre Rainville, Laurence Tremblay, Greg Adams, Andrew McCartney, Eric Bauce, John MacKay
Article
Ecology
Gaetan Moreau, Don P. Ostaff, Eric Bauce, Eldon S. Eveleigh, Christopher J. Lucarotti, Benoit Morin, Dan T. Quiring
Article
Forestry
Alvaro Fuentealba, Alain Dupont, Christian Hebert, Richard Berthiaume, Roberto Quezada-Garcia, Eric Bauce
FOREST ECOLOGY AND MANAGEMENT
(2019)
Article
Entomology
Jean-Michel Beland, Eric Bauce, Conrad Cloutier, Richard Berthiaume, Christian Hebert
AGRICULTURAL AND FOREST ENTOMOLOGY
(2019)
Article
Multidisciplinary Sciences
Dominic Donkor, Zahra Mirzahosseini, Jacquie Bede, Eric Bauce, Emma Despland
Article
Evolutionary Biology
Genevieve J. Parent, Claudia Mendez-Espinoza, Isabelle Giguere, Melissa H. Mageroy, Martin Charest, Eric Bauce, Joerg Bohlmann, John J. MacKay
EVOLUTIONARY APPLICATIONS
(2020)
Article
Ecology
Alvaro Fuentealba, Solene Sagne, Gaspar Legendre, Deepa Pureswaran, Eric Bauce, Emma Despland
ARTHROPOD-PLANT INTERACTIONS
(2020)
Article
Forestry
Jonathan Boucher, Christian Hebert, Eric Bauce
CANADIAN JOURNAL OF FOREST RESEARCH
(2020)
Article
Entomology
Richard Berthiaume, Christian Hebert, Martin Charest, Alain Dupont, Eric Bauce
ENVIRONMENTAL ENTOMOLOGY
(2020)
Article
Forestry
Richard Berthiaume, Christian Hebert, Alain Dupont, Martin Charest, Eric Bauce
FORESTRY CHRONICLE
(2020)