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Moth outbreaks in relation to oak masting and population levels of small mammals: an alternative explanation to the mammal-predation hypothesis

Oak mast seeding as a direct cause of gypsy moth outbreaks? : A response to Selås

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Moth outbreaks in relation to oak masting and population levels of small mammals: an alternative explanation to the mammal-predation hypothesis

Content Provider	Springer Nature Link
Author	Selås, Vidar
Copyright Year	2003
Abstract	The relationship between population outbreaks of the gypsy moth (Lymantria dispar) and oak masting in North America has been interpreted as an effect of reduced predation on moth pupae from small mammals after years of acorn failure. However, moth defoliation could be a consequence of high acorn production rather than of acorn failure, as all moth outbreaks in two time series presented by Liebhold et al. [Popul Ecol (2000) 42:257–266] were reported shortly after mast years. A similar pattern has been found for the green oak leaf roller moth (Tortrix viridana) in southern Norway. Because predation from small mammals should be less important for the latter species, I argue that the acorn-moth relationships are most likely caused by mast-induced changes in the chemical composition of oak leaves. Given the high number of eggs laid by each moth female, there is a huge potential for population growth in or shortly after a mast year if larval survival is no longer limited by low food quality.
Starting Page	157
Ending Page	159
Page Count	3
File Format	PDF
ISSN	14383896
Journal	Population Ecology
Volume Number	45
Issue Number	2
e-ISSN	1438390X
Language	English
Publisher	Springer-Verlag
Publisher Date	2003-08-29
Publisher Place	Tokyo
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Acorns Chemical defence Lepidoptera Lymantria dispar Population cycles Tortrix viridana
Content Type	Text
Resource Type	Article
Subject	Ecology, Evolution, Behavior and Systematics

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Effects of alternative prey on predation by small mammals on gypsy moth pupae

Lead migration and accumulation in oak leaves and in larvae and excrements of the green tortrix moth Tortrix viridana and the gypsy moth Lymantria dispar

Performance of a Specialist and a Generalist Herbivorous Moth on Different Quercus robur Genotypes

Spatial genetic structure in populations of the green oak leaf roller, Tortrix viridana L. (Lepidoptera, Tortricidae)

Data from: Transient synchrony among populations of five foliage-feeding Lepidoptera (Dataset)

Data from: Genetic structure, admixture, and invasion success in a Holarctic defoliator, the gypsy moth (Lymantria dispar, Lepidoptera: Erebidae) (Dataset)

Morphological, physiological, and trophic characteristics of the gypsy moth Lymantria dispar L. (Lepidoptera, Lymantriidae) larvae in relation to the hydrothermal conditions and the population density

Factors influencing the duration of gypsy moth (Lymantria dispar L.) population outbreaks

Group effect in the gypsy moth (Lymantria dispar, Lepidoptera, Lymantriidae) related to the population characteristics and food composition

Moth outbreaks in relation to oak masting and population levels of small mammals: an alternative explanation to the mammal-predation hypothesis

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Effects of alternative prey on predation by small mammals on gypsy moth pupae

Lead migration and accumulation in oak leaves and in larvae and excrements of the green tortrix moth Tortrix viridana and the gypsy moth Lymantria dispar

Performance of a Specialist and a Generalist Herbivorous Moth on Different Quercus robur Genotypes

Spatial genetic structure in populations of the green oak leaf roller, Tortrix viridana L. (Lepidoptera, Tortricidae)

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Factors influencing the duration of gypsy moth (Lymantria dispar L.) population outbreaks

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Moth outbreaks in relation to oak masting and population levels of small mammals: an alternative explanation to the mammal-predation hypothesis