scholarly journals Mountain Pine Beetle Infestation: Cycling and Succession in Lodgepole Pine Forests

1987 ◽  
Vol 11 ◽  
pp. 172-174
Author(s):  
W. Romme ◽  
J. Yavitt ◽  
D. Knight ◽  
J. Fedders
Keyword(s):  
National Parks ◽  
Mountain Pine Beetle ◽  
Stand Structure ◽  
Forest Succession ◽  
Fire Risk ◽  
Stand Productivity ◽  
Mountain Pine ◽  
Pine Beetle ◽  
Material Cycling ◽  
Rates Of Growth

This work began in 1980 with the objective of studying the effects of mountain pine beetle outbreaks in Yellowstone and Grand Teton National Parks and the surrounding area. The inmediate effects of outbreaks on stand structure have been documented (Roe and Amman 1970, Amman and Cole 1980), but little is known about long-term influences on ecosystem processes such as primary productivity, material cycling, and succession. Thus, our research deals with the effects of beetle outbreaks on (1) rates of growth in surviving trees and total stand productivity, (2) dead woody fuels and fire risk, (3) forest succession, and (4) nutrient cycling.

scholarly journals Mountain Pine Beetle Infestation: Cycling and Succession in Lodgepole Pine Forests

1986 ◽  
Vol 10 ◽  
pp. 132-133
Author(s):  
W. Romme ◽  
J. Yavitt ◽  
D. Knight ◽  
J. Fedders
Keyword(s):  
National Parks ◽  
Mountain Pine Beetle ◽  
Stand Structure ◽  
Forest Succession ◽  
Fire Risk ◽  
Stand Productivity ◽  
Mountain Pine ◽  
Pine Beetle ◽  
Material Cycling ◽  
Rates Of Growth

This work began in 1980 with the objective of studying the effects of mountain pine beetle outbreaks in Yellowstone and Grand Teton National Parks and the surrounding area. The immediate effects of outbreaks on stand structure have been documented, but little is known about long-term influences on ecosystem processes such as primary productivity, material cycling, and succession. Thus, our research deals with the effects of beetle outbreaks on (1) rates of growth in surviving trees and total stand productivity, (2) dead woody fue1s and fire risk, (3) forest succession, and ( 4) nutrient cycling.

scholarly journals Mountain Pine Beetle Infestation: Cycling and Succession in Lodgepole Pine Forest

1984 ◽  
Vol 8 ◽  
pp. 101-103
Author(s):  
W. Romme ◽  
J. Yavitt ◽  
D. Knight ◽  
J. Fedders
Keyword(s):  
National Parks ◽  
Mountain Pine Beetle ◽  
Stand Structure ◽  
Forest Succession ◽  
Fire Risk ◽  
Stand Productivity ◽  
Mountain Pine ◽  
Pine Beetle ◽  
Material Cycling ◽  
Rates Of Growth

This work began in 1980 with the objective of studying the effects of mountain pine beetle outbreaks in Yellowstone and Grand Teton National Parks and the surrounding area. The immediate effects of outbreaks on stand structure have been documented (Roe and Amman 1970, Amman and Cole 1980), but little is known about long-term influences on ecosystem processes such as primary productivity, material cycling, and succession. Thus, our research deals with the effects of beetle outbreaks on (1) rates of growth in surviving trees and total stand productivity, (2) dead woody fuels and fire risk, (3) forest succession, and (4) nutrient cycling.

scholarly journals Mountain Pine Bettle Infestation: Cycling and Succession in Lodgepole Pine Forests

1985 ◽  
Vol 9 ◽  
pp. 100-102
Author(s):  
W. Romme ◽  
J. Yavitt ◽  
D. Knight ◽  
J. Fedders
Keyword(s):  
National Parks ◽  
Mountain Pine Beetle ◽  
Stand Structure ◽  
Forest Succession ◽  
Fire Risk ◽  
Stand Productivity ◽  
Mountain Pine ◽  
Pine Beetle ◽  
Material Cycling ◽  
Rates Of Growth

This work began in 1980 with the objective of studying the effects of mountain pine beetle outbreaks in Yellowstone and Grand Teton National Parks and the surrounding area. The immediate effects of outbreaks on stand structure have been documented (Roe and Amman 1970, Amman and Cole 1980), but little is known about long-term influences on ecosystem processes such as primary productivity, material cycling, and succession. Thus, our research deals with the effects of beetle outbreaks on (1) rates of growth in surviving trees and total stand productivity, (2) dead woody fuels and fire risk, (3) forest succession, and (4) nutrient cycling.

Forest structure altered by mountain pine beetle outbreaks affects subsequent attack in a Wyoming lodgepole pine forest, USA

2011 ◽  
Vol 41 (12) ◽  
pp. 2403-2412 ◽  
Author(s):  
Daniel M. Kashian ◽  
Rebecca M. Jackson ◽  
Heather D. Lyons
Keyword(s):  
Pinus Contorta ◽  
Mountain Pine Beetle ◽  
Stand Structure ◽  
Lodgepole Pine ◽  
Climate Change Scenarios ◽  
Cone Production ◽  
Mountain Pine ◽  
Large Trees ◽  
Pine Beetle ◽  
The 1960S

Extensive outbreaks of the mountain pine beetle ( Dendroctonus ponderosae Hopkins) will alter the structure of many stands that will likely be attacked again before experiencing a stand-replacing fire. We examined a stand of lodgepole pine ( Pinus contorta var. latifolia Engelm. ex S. Watson) in Grand Teton National Park currently experiencing a moderate-level outbreak and previously attacked by mountain pine beetle in the 1960s. Consistent with published studies, tree diameter was the main predictor of beetle attack on a given tree, large trees were preferentially attacked, and tree vigor, age, and cone production were unimportant variables for beetle attack at epidemic levels. Small trees killed in the stand were killed based mainly on their proximity to large trees and were likely spatially aggregated with large trees as a result of the previous outbreak. We concluded that the driving factors of beetle attack and their spatial patterns are consistent across outbreak severities but that stand structure altered by the previous outbreak had implications for the current outbreaks in the same location. This study should catalyze additional research that examines how beetle-altered stand structure affects future outbreaks — an important priority for predicting their impacts under climate change scenarios that project increases in outbreak frequency and extent.

scholarly journals Mountain Pine Beetle Infestation: Cycling and Succession in Lodgepole Pine Forest

1981 ◽  
Vol 5 ◽  
pp. 131-135
Author(s):  
W. Romme ◽  
J. Yavitt ◽  
D. Knight
Keyword(s):  
National Parks ◽  
Yellowstone National Park ◽  
National Park ◽  
Pinus Contorta ◽  
Mountain Pine Beetle ◽  
Lodgepole Pine ◽  
Pine Forest ◽  
Mountain Pine ◽  
Pine Beetle ◽  
Surrounding Areas

A research project was initiated in 1980 to study the effects of outbreaks of the mountain pine beetle (Dendroctonus ponderosae Hopkins) on lodgepole pine forest (Pinus contorta Dougl. ssp. latifolia) in Yellowstone National Park and surrounding areas. This native insect apparently has long been associated with lodgepole pine, and reports of small numbers of beetles can be found in Park records as early as 1925. However, in the late 1940's and early 1950's major outbreaks began to occur on the Caribou and Targhee National Forests immediately to the west and southwest of Yellowstone and Grand Teton National Parks. An outbreak in Grand Teton National Park and the adjacent Teton National Forest began in the 1950's, with an explosive increase in 1961 followed by an eventual subsidence in the late 1960's. The first major outbreak in Yellowstone National Park began in the late 1960's in the Bechler and South Entrance areas, reaching a peak there in 1970 and later declining. Yearly aerial surveys conducted thereafter showed a steady northward movement of the outbreak through the western half of the Park at a rate of 1 - 5 km per year. By 1978 the peak outbreak was centered around West Yellowstone, with hundreds of infested trees per hectare. The outbreak is now moving north and east along the Madison and Gibbon Rivers, with the greatest beetle populations currently in the vicinity of Madison Junction.

scholarly journals Economic Impact of Mountain Pine Beetle on Outdoor Recreation

1975 ◽  
Vol 7 (2) ◽  
pp. 43-50 ◽  
Author(s):  
E.L. Michalson
Keyword(s):  
Economic Impact ◽  
National Parks ◽  
Outdoor Recreation ◽  
Mountain Pine Beetle ◽  
Mountain Pine ◽  
Recreation Areas ◽  
Pine Beetle ◽  
Recreation Opportunities ◽  
Recreation Area ◽  
Water Sports

This study estimates the economic impact of outdoor recreation as a contributor to total value of forest resources in an area which has been heavily infested by Mountain Pine Beetle. The area of study was the Island Park are in eastern Idaho's Targhee National Forest. Targhee is a popular recreation area west of Yellowstone and Grand Teton National Parks. Recreationists use the area for both destination and non-destination purposes. The recreation opportunities of this area include water sports, hiking and related outdoor activities. It is classed as one of Idaho's major recreation areas.

Distribution and severity of white pine blister rust and mountain pine beetle on whitebark pine in British Columbia

2000 ◽  
Vol 30 (7) ◽  
pp. 1051-1059 ◽  
Author(s):  
Elizabeth M Campbell ◽  
Joseph A Antos
Keyword(s):  
British Columbia ◽  
Mountain Pine Beetle ◽  
Stand Structure ◽  
The United States ◽  
Whitebark Pine ◽  
White Pine Blister Rust ◽  
White Pine ◽  
Blister Rust ◽  
Mountain Pine ◽  
Pine Beetle

A major decline in the abundance of whitebark pine (Pinus albicaulis Engelm.) has recently occurred in the United States, primarily as a result of white pine blister rust (Cronartium ribicola J.C. Fisch. ex Raben.). However, no information on the status of whitebark pine in British Columbia, Canada, was available. We sampled 54 subalpine stands in British Columbia, examining all whitebark pine trees within plots for evidence of blister rust and mountain pine beetle (Dendroctonus ponderosae Hopk.) damage. About 21% of all whitebark pine stems were dead, and blister rust was the most important agent of mortality. Of all living trees sampled, 27% had obvious blister rust infection (cankers), but actual incidence was suspected of being as high as 44% (using all evidence of blister rust). Blister rust incidence and whitebark pine mortality were significantly related to differences in stand structure and the presence of Ribes spp., but relationships with local climate and site variables were absent or weak. The lack of strong relationships with climate suggests favourable conditions for the spread of the disease throughout most of British Columbia. Very little evidence of mountain pine beetle was found. Overall, the prospects for whitebark pine in British Columbia do not appear good; a large reduction in population levels seems imminent.

scholarly journals Whitebark and Foxtail Pine in Yosemite, Sequoia, and Kings Canyon National Parks: Initial Assessment of Stand Structure and Condition

Forests ◽  
2019 ◽  
Vol 10 (1) ◽  
pp. 35 ◽  
Author(s):  
Jonathan C.B. Nesmith ◽  
Micah Wright ◽  
Erik S. Jules ◽  
Shawn T. McKinney
Keyword(s):  
Sierra Nevada ◽  
National Parks ◽  
Mountain Pine Beetle ◽  
Whitebark Pine ◽  
White Pine Blister Rust ◽  
White Pine ◽  
Blister Rust ◽  
Mountain Pine ◽  
Pine Beetle ◽  
Foxtail Pine

The Inventory & Monitoring Division of the U.S. National Park Service conducts long-term monitoring to provide park managers information on the status and trends in biological and environmental attributes including white pines. White pines are foundational species in many subalpine ecosystems and are currently experiencing population declines. Here we present results on the status of whitebark and foxtail pine in the southern Sierra Nevada of California, an area understudied relative to other parts of their ranges. We selected random plot locations in Yosemite, Sequoia, and Kings Canyon national parks using an equal probability spatially-balanced approach. Tree- and plot-level data were collected on forest structure, composition, demography, cone production, crown mortality, and incidence of white pine blister rust and mountain pine beetle. We measured 7899 whitebark pine, 1112 foxtail pine, and 6085 other trees from 2012–2017. All factors for both species were spatially highly variable. Whitebark pine occurred in nearly-pure krummholz stands at or near treeline and as a minor component of mixed species forests. Ovulate cones were observed on 25% of whitebark pine and 69% of foxtail pine. Whitebark pine seedlings were recorded in 58% of plots, and foxtail pine seedlings in only 21% of plots. Crown mortality (8% in whitebark, 6% in foxtail) was low and significantly higher in 2017 compared to previous years. Less than 1% of whitebark and zero foxtail pine were infected with white pine blister rust and <1% of whitebark and foxtail pine displayed symptoms of mountain pine beetle attack. High elevation white pines in the southern Sierra Nevada are healthy compared to other portions of their range where population declines are significant and well documented. However, increasing white pine blister rust and mountain pine beetle occurrence, coupled with climate change projections, portend future declines for these species, underscoring the need for broad-scale collaborative monitoring.

Lodgepole pine regeneration in an old, self-perpetuating forest in south central Oregon

1989 ◽  
Vol 19 (9) ◽  
pp. 1096-1104 ◽  
Author(s):  
John D. Stuart ◽  
James K. Agee ◽  
Robert I. Gara
Keyword(s):  
Sierra Nevada ◽  
Mountain Pine Beetle ◽  
Stand Structure ◽  
Lodgepole Pine ◽  
Disturbance Intensity ◽  
South Central ◽  
Mountain Pine ◽  
Pine Regeneration ◽  
Pine Beetle ◽  
Type Frequency

Historic regeneration patterns and regeneration requirements were investigated in an old, self-regenerating lodgepole pine (Pinusconforta Dougl. ssp. murrayana (Balf.) Critchfield) forest in south central Oregon. The forest was multiaged, with episodic regeneration pulses being correlated with mountain pine beetle (Dendroctonusponderosae Hopk.) outbreaks or fire. The magnitude of a regeneration pulse was a function of disturbance intensity. Tree ring indices show growth declines prior to mountain pine beetle outbreaks. Radial tree growth improved following disturbance. Differences in stand structure among climax lodgepole pine stands in the Rocky Mountains, Sierra Nevada, and south central Oregon were related to disturbance type, frequency, and intensity. Successful lodgepole pine reproduction was limited by soil moisture and partly by microclimate. Shading did not inhibit seedling establishment, but rather provided relief from excessive evapotranspiration, heat, and frost.

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