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Titre :
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Natural variability of specific forest insect populations and their associated effects in Colorado
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Auteurs :
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J. Schmid ;
S. Mata
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Type de document :
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article/chapitre/communication
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|
Année de publication :
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1996
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Format :
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14 p.
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Note générale :
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3 p. de bibl.
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Langues :
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= Anglais
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Catégories :
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Dégâts causés aux forêts
Zoologie - Ethologie
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Mots-clés :
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COLORADO
;
USA
;
COLEOPTERE
;
LEPIDOPTERE
;
SCOLYTE
;
INSECTE RAVAGEUR
;
DEGATS D'INSECTES
;
FORET
;
DYNAMIQUE DE POPULATION
;
DYNAMIQUE SPATIOTEMPORELLE
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Résumé :
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The natural variability for specific native bark beetle (Coleoptera : Scolytidae) and defoliator (lepidoptera : Lasiocampidae, Saturniidae, Tortricidae) populations in the forests of Colorado ranges from endemic to epidemic. The effects of endemic and epidemic populations of these species on the forest and related resources are contrasted. The frequency and duration of epidemics for each species are discussed. Most of hese species are at endemic population levels or in the lower portion of their natural population range as of 1994. Frequency and magnitude of future epidemics are discussed
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Source :
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USDA forest service - Rocky Mountain forest and range experiment station - general technical report, vol RM-GTR-275
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