Risk rating for mountain pine beetle infestation of lodgepole pine forests over large areas with ordinal regression modelling

C. Robertson, M. A. Wulder, Trisalyn Nelson, J. C. White

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

The mountain pine beetle Dendroctonus ponderosae Hopkins is endemic to lodgepole pine, Pinus contorta var. latifolia Engelmann, forests in western Canada. However, the current beetle epidemic in this area highlights the challenges faced by forest managers tasked with prioritizing stands for mitigation activities such as salvage harvesting and direct control methods. In western Canada, the operational risk rating system for mountain pine beetle is based on biological knowledge gained from a rich legacy of stand-scale field studies. Due to the large spatial (millions of hectares affected) and temporal (over 10 years) extents of the current epidemic, new research into large-area mountain pine beetle processes has revealed further insights into the landscape-scale characteristics of beetle infested forests. In this paper, we evaluated the potential for this new knowledge to augment an established system for rating the short-term risk of tree mortality in a stand due to mountain pine beetle. New variables explored for utility in risk rating include direct shortwave radiation, site index, diameter at breast height, the temporal trends in local beetle populations, Biogeoclimatic Ecosystem Classification and beetle-host interaction variables. Proportional odds ordinal regression was used to develop a model for the Vanderhoof Forest District in west-central British Columbia. Prediction on independent data was assessed with the area under the receiver operator curve (AUC), indicating good discriminatory power (AUC = 0.84) for predicting levels of mountain pine beetle-caused pine mortality.

Original languageEnglish (US)
Pages (from-to)900-912
Number of pages13
JournalForest Ecology and Management
Volume256
Issue number5
DOIs
StatePublished - Aug 20 2008
Externally publishedYes

Fingerprint

Dendroctonus ponderosae
Pinus contorta var. latifolia
coniferous forests
beetle
mountain
Coleoptera
modeling
Canada
salvage logging
tree mortality
tree and stand measurements
British Columbia
beetle infestations
mortality
control methods
managers
site index
shortwave radiation
Pinus
taxonomy

Keywords

  • Bark beetles
  • Dendroctonus ponderosae
  • Mountain pine beetle
  • Risk rating

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Forestry
  • Ecology

Cite this

Risk rating for mountain pine beetle infestation of lodgepole pine forests over large areas with ordinal regression modelling. / Robertson, C.; Wulder, M. A.; Nelson, Trisalyn; White, J. C.

In: Forest Ecology and Management, Vol. 256, No. 5, 20.08.2008, p. 900-912.

Research output: Contribution to journalArticle

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