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Keyword: Pinus albicaulis

Whitebark pine (Pinus albicaulis) growth and defense in response to mountain pine beetle outbreaks

Publications Posted on: October 01, 2020
Whitebark pine (WBP; Pinus albicaulis) is a critical keystone forest species of U.S. Northern Rocky Mountain subalpine ecosystems (Tomback et al. 2001).

Whitebark pine encroachment into lower-elevation sagebrush grasslands in southwest Montana, USA

Publications Posted on: August 10, 2020
Projections for the future health and abundance of whitebark pine (Pinus albicaulis Engelm.) populations in western North America are dire. Not only has the species been declining due to the combined effects of fire exclusion policies, mountain pine beetle (Dendroctonus ponderosae Hopkins 1902) outbreaks, and white pine blister rust (Cronartium ribicola J.C.

An economical approach to distinguish genetically needles of limber from whitebark pine

Publications Posted on: August 10, 2020
Whitebark pine is difficult to distinguish from limber pine when seed cones are not present. This is often the case because of young stand age, growth at environmental extremes, or harvesting by vertebrate species. Developing an economical genetic identification tool that distinguishes non-cone-bearing limber from whitebark pine, therefore, could aid many kinds of research on these species.

Individual variation and ecotypic niches in simulations of the impact of climatic volatility

Publications Posted on: October 02, 2019
Expectations of the impacts of climatic variation on species can depend on whether and how intraspecific variability is incorporated in models. Coefficients of variation from tree-ring records of Pinus albicaulis through time and across space were used to parameterize volatility and individuality, respectively.

Back from the brink: Framework to sustain resilience to species at risk

Science Spotlights Posted on: August 14, 2019
The Regeneration for Resilience (R4R) framework provides a decision structure to prioritize limited resources and utilize seedling planting and natural regeneration management to offer the best likelihood of success in positioning stands and landscapes to support resilience self-sustaining tree populations that are threatened by invasive pests. Effective management of forest regeneration dynamics can increase forest resilience and adaptive capacity to mitigate impacts of invasive species.

Phenotypic selection on growth rhythm in whitebark pine under climatic conditions warmer than seed origins

Publications Posted on: May 22, 2019
Growth rhythm that is well synchronized with seasonal changes in local climatic conditions is understood to enhance fitness; however, rapid ongoing climate change threatens to disrupt this synchrony.

Best friends forever: The whitebark pine and Clark's nutcracker

Publications Posted on: October 05, 2018
It’s late fall in the high mountains of western North America and the whitebark pine (Pinus albicaulis) forests are alive with activity. Birds and mammals are feasting on the pine’s copious amounts of large seeds. When the cones ripen, the competition for the fatty, nutritious seeds - which contain “more energy than chocolate per unit of weight” according to the Cornell Laboratory of Ornithology - is a sight to see.

Fire enhances the complexity of forest structure in alpine treeline ecotones

Publications Posted on: October 05, 2018
Alpine treelines are expected to move upward in a warming climate, but downward in response to increases in wildfire. We studied the effects of fire on vegetation structure and composition across four alpine treeline ecotones extending from Abies lasiocarpa/Picea engelmannii forests at lower elevations, through Pinus albicaulis/Larix lyallii parkland, to alpine tundra.

Regeneration for resilience framework to support regeneration decisions for species with populations at risk of extirpation by white pine blister rust

Publications Posted on: October 05, 2018
Natural forests are increasingly invaded by nonnative pests and pathogens that threaten host species with population extirpation and cascading ecological impacts.

The big picture on whitebark pine

FS News Posted on: August 31, 2018
Throughout the western United States, whitebark pine is experiencing high mortality, leading to concern about long-term viability of whitebark pine and other species that depend on it. Two new studies of whitebark pine in the western U.S. show that this species continues to die-off in alarming numbers and identifies locations where forest managers may be able to encourage growth of young whitebark pines.