Author: Matthew D. Klingenberg
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
A concern to reforestation efforts following the recent outbreak of mountain pine beetle, Dendroctonus ponderosae Hopkins, is the migration of the below-ground herbivore Warren root collar weevil, Hylobius warreni Wood, from stands with a high percentage (>80%) of mature, dead lodgepole pine, Pinus contorta var latifolia Dougl. ex. Loud., into adjacent young, replanted stands, resulting in significant levels of mortality to juvenile trees. The effects of the spatial patterns of salvage harvesting following outbreaks of mountain pine beetle on the development of Warren root collar weevil pressure in neighbouring, regenerating stands was examined in young lodgepole pine stands in the central interior of British Columbia, Canada. Gradients of tree mortality caused by feeding of Warren root collar weevils were observed and found to be dependent on characteristics of the adjacent, unsalvaged stands. Mortality was exacerbated by high components of dead pine in these stands, and became worse over time. To investigate whether reduced host availability is a potential causal factor explaining such patterns, I constructed three research plots consisting of combinations of live tree, dead tree and mixed (i.e., live and dead) tree habitats and observed dispersal patterns of labeled insects. Weevils were more likely to be captured close to the release location in the mixed and live habitats vs. the dead habitat. Movement rate was high in the dead habitat compared with the live and mixed habitats. In the plot with the dead habitat adjacent to the location of release, the probability of capture was lower, but movement rate and dispersal distance were greater, indicating that Warren root collar weevils will disperse out of a habitat with dead trees into a habitat with live trees. Implications to reforestation strategies following savage harvesting are discussed.--P.ii.
Spatiotemporal Associations Between Forests Impacted by Mountain Pine Beetle and Adjacent Replantings Impacted by Warren Root Collar Weevil
Author: Matthew D. Klingenberg
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
A concern to reforestation efforts following the recent outbreak of mountain pine beetle, Dendroctonus ponderosae Hopkins, is the migration of the below-ground herbivore Warren root collar weevil, Hylobius warreni Wood, from stands with a high percentage (>80%) of mature, dead lodgepole pine, Pinus contorta var latifolia Dougl. ex. Loud., into adjacent young, replanted stands, resulting in significant levels of mortality to juvenile trees. The effects of the spatial patterns of salvage harvesting following outbreaks of mountain pine beetle on the development of Warren root collar weevil pressure in neighbouring, regenerating stands was examined in young lodgepole pine stands in the central interior of British Columbia, Canada. Gradients of tree mortality caused by feeding of Warren root collar weevils were observed and found to be dependent on characteristics of the adjacent, unsalvaged stands. Mortality was exacerbated by high components of dead pine in these stands, and became worse over time. To investigate whether reduced host availability is a potential causal factor explaining such patterns, I constructed three research plots consisting of combinations of live tree, dead tree and mixed (i.e., live and dead) tree habitats and observed dispersal patterns of labeled insects. Weevils were more likely to be captured close to the release location in the mixed and live habitats vs. the dead habitat. Movement rate was high in the dead habitat compared with the live and mixed habitats. In the plot with the dead habitat adjacent to the location of release, the probability of capture was lower, but movement rate and dispersal distance were greater, indicating that Warren root collar weevils will disperse out of a habitat with dead trees into a habitat with live trees. Implications to reforestation strategies following savage harvesting are discussed.--P.ii.
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
A concern to reforestation efforts following the recent outbreak of mountain pine beetle, Dendroctonus ponderosae Hopkins, is the migration of the below-ground herbivore Warren root collar weevil, Hylobius warreni Wood, from stands with a high percentage (>80%) of mature, dead lodgepole pine, Pinus contorta var latifolia Dougl. ex. Loud., into adjacent young, replanted stands, resulting in significant levels of mortality to juvenile trees. The effects of the spatial patterns of salvage harvesting following outbreaks of mountain pine beetle on the development of Warren root collar weevil pressure in neighbouring, regenerating stands was examined in young lodgepole pine stands in the central interior of British Columbia, Canada. Gradients of tree mortality caused by feeding of Warren root collar weevils were observed and found to be dependent on characteristics of the adjacent, unsalvaged stands. Mortality was exacerbated by high components of dead pine in these stands, and became worse over time. To investigate whether reduced host availability is a potential causal factor explaining such patterns, I constructed three research plots consisting of combinations of live tree, dead tree and mixed (i.e., live and dead) tree habitats and observed dispersal patterns of labeled insects. Weevils were more likely to be captured close to the release location in the mixed and live habitats vs. the dead habitat. Movement rate was high in the dead habitat compared with the live and mixed habitats. In the plot with the dead habitat adjacent to the location of release, the probability of capture was lower, but movement rate and dispersal distance were greater, indicating that Warren root collar weevils will disperse out of a habitat with dead trees into a habitat with live trees. Implications to reforestation strategies following savage harvesting are discussed.--P.ii.
Association of an Endemic Mountain Pine Beetle Population with Lodgepole Pine Infected by Armillaria Root Disease in Utah
Author: Borys M. Tkacz
Publisher:
ISBN:
Category : Lodgepole pine
Languages : en
Pages : 8
Book Description
Publisher:
ISBN:
Category : Lodgepole pine
Languages : en
Pages : 8
Book Description
Stand Density and Mountain Pine Beetle-caused Tree Mortality in Ponderosa Pine Stands
Author: J. M. Schmid
Publisher:
ISBN:
Category : Mountain pine beetle
Languages : en
Pages : 4
Book Description
Publisher:
ISBN:
Category : Mountain pine beetle
Languages : en
Pages : 4
Book Description
Ponderosa Pine Mortality Resulting from a Mountain Pine Beetle Outbreak
Author: William F. McCambridge
Publisher:
ISBN:
Category : Mountain pine beetle
Languages : en
Pages : 12
Book Description
From 1965 to 1978, mountain pine beetles killed 25% of the pines taller than 4.5 feet in a study area in north-central Colorado. Average basal area was reduced from 92 to 58 square feet per acre. Mortality increased with tree diameter up to about 9 inches d.b.h. Larger trees appeared to be killed at random. Mortality was directly related to number of trees per acre and presence of dwarf mistletoe, but not to site index, elevation, and percent Douglas-fir in the stand.
Publisher:
ISBN:
Category : Mountain pine beetle
Languages : en
Pages : 12
Book Description
From 1965 to 1978, mountain pine beetles killed 25% of the pines taller than 4.5 feet in a study area in north-central Colorado. Average basal area was reduced from 92 to 58 square feet per acre. Mortality increased with tree diameter up to about 9 inches d.b.h. Larger trees appeared to be killed at random. Mortality was directly related to number of trees per acre and presence of dwarf mistletoe, but not to site index, elevation, and percent Douglas-fir in the stand.
Mountain Pine Beetle-caused Tree Mortality in Partially Cut Plots Surrounded by Unmanaged Stands
Author: J. M. Schmid
Publisher:
ISBN:
Category : Black Hills National Forest (S.D. and Wyo.)
Languages : en
Pages : 16
Book Description
Publisher:
ISBN:
Category : Black Hills National Forest (S.D. and Wyo.)
Languages : en
Pages : 16
Book Description
Mountain Pine Beetle, Protection of Individual Trees from Attack
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 128
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 128
Book Description
Impact of Mountain Pine Beetle Infestation and Salvage Harvesting on Seasonal Snow Melt and Runoff
Author: Sarah Boon
Publisher:
ISBN:
Category : Nature
Languages : en
Pages : 38
Book Description
"This study examines the impact of mountain pine beetle infestation on forest canopy structure on the Nechako Plateau, and the resulting impacts on snow accumulation and ablation under varied climatic conditions. Stand-scale results were used to drive a physically-based, distributed hydrological model of the Van Tine Creek watershed and assess watershed-scale hydrologic response to four harvesting/infestation scenarios."--Document.
Publisher:
ISBN:
Category : Nature
Languages : en
Pages : 38
Book Description
"This study examines the impact of mountain pine beetle infestation on forest canopy structure on the Nechako Plateau, and the resulting impacts on snow accumulation and ablation under varied climatic conditions. Stand-scale results were used to drive a physically-based, distributed hydrological model of the Van Tine Creek watershed and assess watershed-scale hydrologic response to four harvesting/infestation scenarios."--Document.
Potential Influences of Horizontal and Vertical Air Movement in Ponderosa Pine Stands on Mountain Pine Beetle Dispersal
Author: J. M. Schmid
Publisher:
ISBN:
Category : Mountain pine beetle
Languages : en
Pages : 4
Book Description
Publisher:
ISBN:
Category : Mountain pine beetle
Languages : en
Pages : 4
Book Description
Estimating the Rate and Amount of Tree Loss from Mountain Pine Beetle Infestations
Author: Walter E. Cole
Publisher:
ISBN:
Category : Mountain pine beetle
Languages : en
Pages : 24
Book Description
Publisher:
ISBN:
Category : Mountain pine beetle
Languages : en
Pages : 24
Book Description
Does the Mountain Pine Beetle Change Hosts in Mixed Lodgepole and Whitebark Pine Stands?
Author: Bruce H. Baker
Publisher:
ISBN:
Category : Lodgepole pine
Languages : en
Pages : 762
Book Description
Publisher:
ISBN:
Category : Lodgepole pine
Languages : en
Pages : 762
Book Description