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Climate is stronger than you think: Exploring functional planting and TRIAD zoning for increased forest resilience to extreme disturbances. [PDF]
PLoS OneHardy C +4 more
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Timber harvesting was the most important factor driving changes in vegetation composition, as compared to climate and fire regime shifts, in the mixedwood temperate forests of Temiscamingue since AD 1830. [PDF]
Landsc EcolRobles D +5 more
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Spatial patterning of the spruce budworm
Journal of Mathematical Biology, 1979The spatial and temporal distribution of the spruce budworm is modelled by a nonlinear diffusion equation. Two questions are considered: 1. What is the critical size of a patch of forest which can support an outbreak? 2. What is the width of an effective barrier to spread of an outbreak?
D G Aronson, H F Weinberger, Aronson D G
exaly +2 more sources
2021
The spruce budworm is a defoliator of boreal forests in North America and can cause major impacts to spruce and balsam fir, which are important tree species in the logging industry. While most years the spruce budworm density is low and little harm comes to these trees, periodically throughout history large outbreaks of the spruce budworms occurred ...
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The spruce budworm is a defoliator of boreal forests in North America and can cause major impacts to spruce and balsam fir, which are important tree species in the logging industry. While most years the spruce budworm density is low and little harm comes to these trees, periodically throughout history large outbreaks of the spruce budworms occurred ...
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Spruce Budworms Handbook: Regional Evaluation of B.t. for Spruce Budworm Control
1983Excerpt from the report Summary: B.t. is the only biological or microbial safe insecticide available for spruce budworm control. Indeed, it is likely to be the only alternative to chemical pesticides in the foreseeable future. B.t. treatments sometimes fail to achieve acceptable results, just as chemical insecticides do, but given reasonable conditions
Grimble, D. G. +3 more
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Baculoviruses in populations of western spruce budworm
Journal of Invertebrate Pathology, 2015Population studies of western spruce budworm, Choristoneura occidentalis, revealed that a baculovirus, ChocNPV, was widespread in outbreak populations over a broad geographical area of British Columbia, Canada although the rate of mortality was usually low (
V G, Nealis +4 more
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Relaxation oscillations in spruce–budworm interactions
Nonlinear Analysis: Real World Applications, 2011The authors consider a mathematical model for the spruce-budworm interaction. A normalized form of this prey-predator system reads \[ \begin{aligned}\varepsilon {dZ\over d\tau} &= Y\Biggl[{Z\over Y}\Biggl(1-{Z\over Y}\Biggr)- {1\over Y} {Z^2\over \alpha^2 Y^2+ Z^2}\Biggr],\\ {dY\over d\tau} &= Y\Biggl[1- {Y\over Y_{\max}}- \rho{Z\over Y}\Biggr],\end ...
Rasmussen, Anne +2 more
openaire +2 more sources
1997
A classical example for the implications of catastrophes for ecosystem management is the spruce budworm dynamics. Spruce budworm is a caterpillar that feeds on spruce and fir forests in the northeastern USA and eastern Canada. For many years, population sizes of spruce budworm are low and have little impact on trees.
Bruce Hannon, Matthias Ruth
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A classical example for the implications of catastrophes for ecosystem management is the spruce budworm dynamics. Spruce budworm is a caterpillar that feeds on spruce and fir forests in the northeastern USA and eastern Canada. For many years, population sizes of spruce budworm are low and have little impact on trees.
Bruce Hannon, Matthias Ruth
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The phenology of white spruce and the spruce budworm in northern Alberta
Canadian Journal of Forest Research, 1992Studies on the development of spruce budworm (Choristoneurafumiferana (Clem.)) on white spruce (Piceaglauca (Moench) Voss) were conducted in northern Alberta in 1969 and again in 1990. The phenology of this insect and its host were described using stochastic models.
W.J.A. Volney, H.F. Cerezke
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