Canadian Forest Service Publications

Exploring the spatial-temporal interaction of mountain pine beetle infestations. 2008. Robertson, C.; Nelson, T.A.; Boots, B. Natural Resources Canada, Canadian Forest Service, Pacific Forestry Centre, Victoria B.C. Mountain Pine Beetle Working Paper 2007-09. 39 p.

Year: 2008

Available from: Pacific Forestry Centre

Catalog ID: 28841

Language: English

Series: Mountain Pine Beetle Working Paper (PFC - Victoria)

CFS Availability: Order paper copy (free), PDF (download)

Abstract

Mountain pine beetle (Dendroctonus ponderosae Hopkins) dispersal processes drive the spatial and temporal development of outbreaks. Understanding these processes is important for modelling future infestations and guiding forest management decisions. In this study, the spatial patterns of red- and green-attacked trees were used to characterize the spatial-temporal nature of dispersal. Research aims were to detect evidence of dispersal based on the distance and direction between red- and green-attacked tree clusters, determine how dispersal patterns change at different stages of infestation, and to detect landscape variables influencing the observed dispersal patterns. Variables explored included Biogeoclimatic Ecosystem Classification (BEC), topography and the local population of susceptible hosts. Dispersal distances of 30 m and 50 m were consistently observed among different data subsets. Findings suggest that short range dispersal often occurs despite an available population of susceptible hosts, and as the infestation grows in intensity, the abundance of dispersing beetles may cause spot infestations to coalesce.

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