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Keyword: high elevation five-needle pines

Whitebark pine (Pinus albicaulis) assisted migration trial

Publications Posted on: June 30, 2011
Assisted migration - the translocation of a species into a climatically-suitable location outside of its current range - has been proposed as a means of saving vulnerable species from extinction as temperatures rise due to climate change. We explore this controversial technique using the keystone wildlife symbiote and ecosystem engineer, whitebark pine (Pinus albicaulis).

Climate change response of great basin bristlecone pine in the Nevada NSF-EPSCoR Project (www.nvclimatechange.org)

Publications Posted on: June 30, 2011
Predicting the future of high-elevation pine populations is closely linked to correctly interpreting their past responses to climatic variability. As a proxy index of climate, dendrochronological records have the advantage of seasonal to annual resolution over multiple centuries to millennia (Bradley 1999).

Influence of fire on mycorrhizal colonization of planted and natural whitebark pine seedlings: Ecology and management implications

Publications Posted on: June 30, 2011
Whitebark pine (Pinus albicaulis) is a threatened keystone species in subalpine zones of Western North America that plays a role in watershed dynamics and maintenance of high elevation biodiversity (Schwandt, 2006). Whitebark pine has experienced significant mortality due to white pine blister rust, mountain pine beetle outbreaks and successional replacement possibly due to fire suppression (Schwandt 2006; Smith and others 2008).

Fuel and fire behavior in high-elevation five-needle pines affected by mountain pine beetle

Publications Posted on: June 30, 2011
Bark beetle-caused tree mortality in conifer forests affects the quantity and quality of forest fuels and has long been assumed to increase fire hazard and potential fire behavior. In reality, bark beetles and their effects on fuel accumulation and subsequent fire hazard have only recently been described.

Modeling climate changes and wildfire interactions: Effects on whitebark pine (Pinus albicaulis) and implications for restoration, Glacier National Park, Montana, USA

Publications Posted on: June 30, 2011
Climate changes are projected to profoundly influence vegetation patterns and community compositions, either directly through increased species mortality and shifts in species distributions, or indirectly through disturbance dynamics such as increased wildfire activity and extent, shifting fire regimes, and pathogenesis.

Fire and high-elevation, five-needle pine (Pinus aristata & P. flexilis) ecosystems in the southern Rocky Mountains: What do we know?

Publications Posted on: June 30, 2011
Rocky Mountain bristlecone pine (Pinus aristata Engelm) and limber pine (P. flexilis James) are high-elevation, fiveneedle pines of the southern Rocky Mountains. The pre-settlement role of fire in bristlecone and limber pine forests remains the subject of considerable uncertainty; both species likely experienced a wide range of fire regimes across gradients of site productivity and connectivity of fuels and flammable landscapes.

Disturbance ecology of high-elevation five-needle pine ecosystems in western North America

Publications Posted on: June 30, 2011
This paper synthesizes existing information about the disturbance ecology of high-elevation five-needle pine ecosystems, describing disturbances regimes, how they are changing or are expected to change, and the implications for ecosystem persistence.

Geographic patterns of genetic variation, population structure and adaptive traits in Pinus aristata, Rocky Mountain bristlecone pine

Publications Posted on: June 30, 2011
Pinus aristata Engelm., Rocky Mountain bristlecone pine, has a narrow geographic and elevational distribution and occurs in disjunct mountain-top populations throughout Colorado and New Mexico in its core range. The species' unique aesthetic and ecological traits combined with the threats of the exotic disease white pine blister rust (WPBR), climate change in high elevation systems, and an outbreak of a native bark beetle make P.

The U.S. Forest Service's renewed focus on gene conservation of five-needle pine species

Publications Posted on: June 30, 2011
The U.S. Forest Service (FS) has been actively working with five-needle pine species for decades. The main focus of this interest has been in restoration efforts involving disease-resistance screening activities in western white (Pinus monticola), sugar (Pinus lambertiana), and eastern white (Pinus strobus) pines in the face of white pine blister rust (WPBR), caused by the non-native invasive pathogen, Cronartium ribicola.

Comparison of genetic diversity and population structure of Pacific Coast whitebark pine across multiple markers

Publications Posted on: June 30, 2011
Analysis of "neutral" molecular markers and "adaptive" quantitative traits are common methods of assessing genetic diversity and population structure. Molecular markers typically reflect the effects of demographic and stochastic processes but are generally assumed to not reflect natural selection.

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