Association of tree diameter with body size and lipid content of mountain pine beetles

2012 ◽  
Vol 144 (3) ◽  
pp. 467-477 ◽  
Author(s):  
M. Graf ◽  
M.L. Reid ◽  
B.H. Aukema ◽  
B.S. Lindgren
Keyword(s):  
Population Dynamics ◽  
Body Size ◽  
Lipid Content ◽  
Primary Objective ◽  
Host Tree ◽  
Mountain Pine Beetles ◽  
Emergence Period ◽  
Tree Diameter ◽  
Mountain Pine ◽  
Pine Beetles

AbstractHost tree diameter is considered an important predictor of the population dynamics of the mountain pine beetle,Dendroctonus ponderosaeHopkins (Coleoptera: Curculionidae: Scolytinae), but the relationship between host tree diameter and beetle traits is unclear. The primary objective of this study was to determine how the quality of individual mountain pine beetles, measured as body size (pronotum width) and lipid content, varied with the diameter of lodgepole pine trees,Pinus contortavar.latifoliaEngelmann (Pinaceae). Naturally attacked trees, ranging in diameter from 10 to 35 cm, were selected from stands near Prince George, British Columbia, Canada. Colonisation density and pupal density generally increased with tree diameter, but the number of pupal chambers per gallery start remained constant. Tree diameter positively affected beetle body size, which in turn was positively correlated with absolute lipid content in both sexes and relative lipid content in males. However, tree diameter did not directly predict absolute lipid content, and relative lipid content decreased with tree diameter in males. Larger beetles emerged earlier in the emergence period with relative lipid content remaining constant throughout emergence. All relationships had considerable unexplained variation. Thus, the use of tree diameter or emergence time as predictors of population dynamics of mountain pine beetles should be done with caution.

THE RELATIONSHIP BETWEEN DENSITY OF EMERGED DENDROCTONUS PONDEROSAE (COLEOPTERA: SCOLYTIDAE) AND DENSITY OF EXIT HOLES IN LODGEPOLE PINE

1985 ◽  
Vol 117 (3) ◽  
pp. 267-275 ◽  
Author(s):  
L. Safranyik ◽  
D.A. Linton
Keyword(s):  
Mountain Pine Beetle ◽  
Lodgepole Pine ◽  
Latex Paint ◽  
Mountain Pine Beetles ◽  
Emergence Period ◽  
South Central ◽  
Mountain Pine ◽  
Pine Beetle ◽  
Pine Beetles ◽  
The Relationship

AbstractThe relationship between the density of insect holes in the bark (X1) and the density of emerged mountain pine beetles (Y) was investigated in naturally infested lodgepole pine in south-central British Columbia. The density of exit and ventilation holes (Ho) that were present in the bark prior to emergence by mountain pine beetle averaged 10% of all holes present following the emergence period. There was a weak but significant inverse relationship between Ho and both phloem thickness and density of emerged mountain pine beetles. Painting the bark with light-color latex paint did not affect survival or the temporal pattern of emergence by mountain pine beetle but ensured identification and greatly enhanced counting of fresh exit holes. Of the several regression models investigated, the relation between Y and both X1 and X2 (= X1 – Ho) was best fitted by a log-log linear model. A method is suggested for setting limits on the size of exit holes cut by mountain pine beetle in order to exclude from X2 much of the variation caused by exit holes cut by associated insects. A simple mathematical model was developed of the relationship between mean density of exit holes and the density of emerged mountain pine beetles.

scholarly journals Field Translocation of Mountain Pine Beetles Suggests Phoretic Mite Communities Are Locally Adapted, and Mite Populations Respond Variably to Climate Warming

Insects ◽  
2021 ◽  
Vol 12 (2) ◽  
pp. 131
Author(s):  
Sneha Vissa ◽  
David N. Soderberg ◽  
Richard W. Hofstetter
Keyword(s):  
Population Dynamics ◽  
Climate Warming ◽  
Bark Beetles ◽  
Linear Models ◽  
Species Abundance ◽  
Local Environment ◽  
Mountain Pine Beetles ◽  
Mountain Pine ◽  
Pine Beetles ◽  
Phoretic Mite

Temperature is a key determining factor in the population dynamics of forest insects and their associated biota. Bark beetles, often considered key agents of change in forest ecosystems, are particularly affected by warming in their environment. Beetles associate with various phoretic mite species that have direct/indirect effects on beetle fitness and population dynamics, although there is limited knowledge of how temperature affects these communities. Here, we use a field reciprocal translocation experiment with the addition of a novel “warming” environment to represent future changes in local environment in two populations of a keystone bark beetle species (Dendroctonus ponderosae). We hypothesize that mite community abundances as carried by bark beetles are significantly altered when not in their native environments and when subjected to climate warming. We use multivariate generalized linear models based on species abundance data to show that mite community compositions significantly differ across different field climates; and that these patterns diverge between source populations, indicating local adaptation. Our study offers foundational information on the general effects of simulated climate-warming on the compositional shifts of common and abundant biotic associates of mountain pine beetles and may be used as a model system for other important insect–mite systems.

Radar observation and aerial capture of mountain pine beetle, Dendroctonus ponderosae Hopk. (Coleoptera: Scolytidae) in flight above the forest canopy

2008 ◽  
Vol 38 (8) ◽  
pp. 2313-2327 ◽  
Author(s):  
Peter L. Jackson ◽  
Dennis Straussfogel ◽  
B. Staffan Lindgren ◽  
Selina Mitchell ◽  
Brendan Murphy
Keyword(s):  
Mountain Pine Beetle ◽  
Forest Canopy ◽  
Dendroctonus Ponderosae ◽  
Weather Radar ◽  
Mountain Pine Beetles ◽  
Emergence Period ◽  
Transport Distance ◽  
Mountain Pine ◽  
Pine Beetle ◽  
Pine Beetles

An outbreak of the mountain pine beetle ( Dendroctonus ponderosae Hopk.) in central British Columbia, Canada, has reached an unprecedented size and intensity and has been spreading. The 2005 emergence and subsequent flight of mountain pine beetle was studied using direct observation of emergence, weather radar imagery, and aerial capture. To verify that the daytime, clear-air radar returns seen during this period were indeed generated by airborne mountain pine beetles, aerial sampling in the area covered by the radar was performed using a drogue capture net towed by a single-engine light aircraft. Results verify that airborne mountain pine beetles are being detected by the weather radar and that, during the emergence period, significant numbers of mountain pine beetles can be found at altitudes up to more than 800 m above the forest canopy. An estimate of transport distance indicates that mountain pine beetles in flight above the forest canopy may move 30–110 km·day–1. An estimate of the instantaneous density of mountain pine beetles in flight above the canopy on flight days in 2005 indicate a mean (maximum) density of 4950 (18 600) beetles·ha–1.

Monoterpene metabolism in female mountain pine beetles,Dendroctonus ponderosae Hopkins, attacking ponderosa pine

1987 ◽  
Vol 13 (6) ◽  
pp. 1455-1480 ◽  
Author(s):  
H. D. Pierce ◽  
J. E. Conn ◽  
A. C. Oehlschlager ◽  
J. H. Borden
Keyword(s):  
Ponderosa Pine ◽  
Dendroctonus Ponderosae ◽  
Mountain Pine Beetles ◽  
Mountain Pine ◽  
Monoterpene Metabolism ◽  
Pine Beetles

scholarly journals Microclimate and mountain pine beetles in two ponderosa pine stands in the Black Hills /

1995 ◽  
Author(s):  
J. M. Schmid ◽  
S. A. Mata ◽  
W. K. Olsen ◽  
Keyword(s):  
Ponderosa Pine ◽  
Black Hills ◽  
Mountain Pine Beetles ◽  
Mountain Pine ◽  
Pine Stands ◽  
Pine Beetles

Mathematical Elements of Attack Risk Analysis for Mountain Pine Beetles

2000 ◽  
Vol 204 (4) ◽  
pp. 601-620 ◽  
Author(s):  
JAMES POWELL ◽  
BRUCE KENNEDY ◽  
PETER WHITE ◽  
BARBARA BENTZ ◽  
JESSE LOGAN ◽  
...  
Keyword(s):  
Risk Analysis ◽  
Mountain Pine Beetles ◽  
Mountain Pine ◽  
Pine Beetles

Toxicity of Monoterpene Structure, Diversity and Concentration to Mountain Pine Beetles, Dendroctonus ponderosae: Beetle Traits Matter More

2017 ◽  
Vol 43 (4) ◽  
pp. 351-361 ◽  
Author(s):  
Mary L. Reid ◽  
Jagdeep K. Sekhon ◽  
Lanielle M. LaFramboise
Keyword(s):  
Dendroctonus Ponderosae ◽  
Mountain Pine Beetles ◽  
Mountain Pine ◽  
Pine Beetles ◽  
Structure Diversity
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