Fire, fungi, and beetle influences on a lodgepole pine ecosystem of south-central Oregon

Interactions between fire, fungi, bark beetles and lodgepole pines growing on the pumice plateau of central Oregon are described. Mountain pine beetle (Dendroctonus ponderosae) outbreaks occur mainly in forests that are 80-150 years old with a mean diameter of about 25 cm and weakened by a fungus, P...

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Bibliographic Details
Published in:Oecologia 1980, Vol.46 (2), p.239-243
Main Authors: Geiszler, D.R, Gara, R.I, Driver, C.H, Gallucci, V.F, Martin, R.E
Format: Article
Language:English
Subjects:
Bark beetles
Coniferous forests
Fire scars
Forest ecosystems
Forest stands
Fungi
Pinus contorta
Pumice
Statistical variance
Tree stumps
Trees
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Summary:Interactions between fire, fungi, bark beetles and lodgepole pines growing on the pumice plateau of central Oregon are described. Mountain pine beetle (Dendroctonus ponderosae) outbreaks occur mainly in forests that are 80-150 years old with a mean diameter of about 25 cm and weakened by a fungus, Phaeolus schweinitzii. The outbreak subsides after most of the large diameter trees are killed. The dead trees fuel subsequent fires which return nutrients to the soil, and a new age class begins. The surviving fire scarred trees are prone to infection by the slow fungal disease and about 100 years later these trees are then susceptible to bark beetle attack.
ISSN:0029-8549
1432-1939
DOI:10.1007/BF00540132