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INSECT OUTBREAK [2 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2013-04-29

English

Subject field(s)
  • Ecology (General)
  • Plant Diseases
CONT

Insect outbreaks are an important natural disturbance in the boreal forest region. Timber loss in the boreal zone of Canada due to insect outbreaks is estimated to be 1.3 to 2.0 times greater per year than wildfire loss ...

French

Domaine(s)
  • Écologie (Généralités)
  • Maladies des plantes
CONT

Les épidémies d'insectes constituent une source importante de perturbation naturelle dans la région boréale canadienne. Les pertes de bois causées par les épidémies d'insectes sont, selon les estimés, environ 1,3 à 2 fois plus élevées que celles causées par les feux de forêts [...]

Spanish

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Record 2 2005-08-10

English

Subject field(s)
  • Ecology (General)
DEF

A sudden increase in the population of a species (especially a pest species).

CONT

Under certain conditions, insects may attack a very large number of trees over a wide area. This is known as an outbreak. An outbreak often occurs in a vulnerable or ageing forest. An outbreak is more likely to occur in large stands of the same vulnerable species when populations of insect predators are too small.

OBS

outbreak: An outbreak generally relates to a negative event (pest outbreak); otherwise the term "irruption" is used to describe an abrupt increase in the number of a species.

PHR

Pest, animal, plant outbreak.

French

Domaine(s)
  • Écologie (Généralités)
DEF

Explosion de la population d'une espèce.

CONT

[...] la pullulation, c'est l'agrégation de plusieurs centaines ou milliers d'individus qui persistent à forte densité pendant des mois voire des années [...

OBS

Le terme pullulation, contrairement au terme anglais «outbreak», désigne une explosion démographique qui peut, sans distinction, avoir un effet négatif ou non pour l'environnement dans lequel elle se produit.

Spanish

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