reference : Incoming! Association of landscape features with dispersing mountain pine beetle populations during a range expansion event in western Canada

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/reference/6c38c904-fe4d-4d89-b125-4f5d4b980eca
Bibliographic fields
reftype Journal Article
Abstract Mountain pine beetle, Dendroctonus ponderosae Hopkins (Coleoptera: Curculionidae, Scolytinae), is a forest insect that undergoes intermittent population eruptions, causing landscape-level mortality to mature pines. Currently, an outbreak covers over 16.3 million ha of British Columbia and Alberta in western Canada. Recent incursion into the jack pine (Pinus banksiana Lamb.) of northwestern Alberta threatens further range expansion through the boreal forest to central and eastern Canada. The spread from British Columbia into northwestern Alberta has been facilitated by above-canopy dispersal of the insect by meso-scale atmospheric currents. At these scales, dispersing D. ponderosae may behave like inert particles, causing terrain-induced tropospheric convective and advective currents to influence population dispersal and establishment. We use spatial point process regression models to examine the association of meso-scale variables, including landscape features and their orientations, habitat suitability, elevation and treatment efforts, with occurrence of D. ponderosae infestations in 2004, 2005, and 2006. Infestations of D. ponderosae primarily established in canyons and valleys, before moving into more open-sloped areas. Southwestern slopes of midslope ridges and small hills, southwest facing open slopes, and valleys that run in a northeast–southwest cardinal direction were positively associated with higher intensities of infestation. This study provides insight into the influences of complex terrain on landscape disturbance by a forest insect, and can be used to prioritize areas for potential management.
Author De la Giroday, Honey-Marie C.; Carroll, Allan L.; Lindgren, B. Staffan; Aukema, Brian H.
DOI 10.1007/s10980-011-9628-9
Date July 19
ISSN 1572-9761
Issue 8
Journal Landscape Ecology
Pages 1097-1110
Title Incoming! Association of landscape features with dispersing mountain pine beetle populations during a range expansion event in western Canada
Type of Article journal article
Volume 26
Year 2011
Bibliographic identifiers
_record_number 25152
_uuid 6c38c904-fe4d-4d89-b125-4f5d4b980eca