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Keyword: seed dispersal

Bird dissemination of dwarf mistletoe on ponderosa pine in Colorado

Publications Posted on: January 08, 2020
Dwarf mistletoe [Arceuthobium vaginatum subsp. cryptopodum (Engelm.) Hawksworth and Wiens] distribution and the role of birds as vectors of the parasite were studied in a Colorado ponderosa pine (Pinus ponderosa Laws.) forest. Occurrence of the parasite at distances from a source greater than those attributable to explosive seed discharge was erratic and infrequent.

Coram Experimental Forest: 50 years of research in a western larch forest

Publications Posted on: August 01, 2018
This publication will enrich public understanding about the important contributions to science made at this and other outdoor laboratories. Coram, and other long-range research sites, provide scientific knowledge to assist resource professionals with the development of sound land management principles. This knowledge ensures healthy, sustainable, and productive ecosystems while meeting social and economic needs.

Evaluating future success of whitebark pine ecosystem restoration under climate change using simulation modeling

Publications Posted on: August 08, 2017
Major declines of whitebark pine forests throughout western North America from the combined effects of mountain pine beetle (Dendroctonus ponderosae) outbreaks, fire exclusion policies, and the exotic disease white pine blister rust (WPBR) have spurred many restoration actions.

Restoring whitebark pine ecosystems in the face of climate change

Publications Posted on: August 03, 2017
Whitebark pine (Pinus albicaulis) forests have been declining throughout their range in western North America from the combined effects of mountain pine beetle (Dendroctonus ponderosae) outbreaks, fire exclusion policies, and the exotic disease white pine blister rust (Cronartium ribicola).

Life on the edge for limber pine: Seed dispersal within a peripheral population

Publications Posted on: September 30, 2016
Interactions within populations at the periphery of a species' range may depart from those in populations more centrally located. Throughout its core range, limber pine (Pinus flexilis, Pinaceae) depends on Clark's nutcrackers (Nucifraga columbiana, Corvidae) for seed dispersal. Nutcrackers, however, rarely visit the Pawnee National Grassland peripheral population of limber pine on the eastern Colorado plains.

Seedling establishment in a masting desert shrub parallels the pattern for forest trees

Publications Posted on: March 27, 2015
The masting phenomenon along with its accompanying suite of seedling adaptive traits has been well studied in forest trees but has rarely been examined in desert shrubs. Blackbrush (Coleogyne ramosissima) is a regionally dominant North American desert shrub whose seeds are produced in mast events and scatter-hoarded by rodents. We followed the fate of seedlings in intact stands vs.

Proceedings-symposium on whitebark pine ecosystems: Ecology and management of a high-mountain resource; 1989 March 29-31; Bozeman, MT

Publications Posted on: January 07, 2013
Includes 52 papers and 14 poster synopses that present current knowledge about ecosystems where whitebark pine and associated flora and fauna predominate. This was the first symposium to explore the ecology and management of these ecosystems, which are becoming increasingly important.

A range-wide restoration strategy for whitebark pine (Pinus albicaulis)

Publications Posted on: June 26, 2012
Whitebark pine (Pinus albicaulis), an important component of western high-elevation forests, has been declining in both the United States and Canada since the early Twentieth Century from the combined effects of mountain pine beetle (Dendroctonus ponderosae) outbreaks, fire exclusion policies, and the spread of the exotic disease white pine blister rust (caused by the pathogen Cronartium ribicola).

Post-fire tree establishment patterns at the alpine treeline ecotone: Mount Rainier National Park, Washington, USA

Publications Posted on: July 29, 2010
Questions: Does tree establishment: (1) occur at a treeline depressed by fire, (2) cause the forest line to ascend upslope, and/or (3) alter landscape heterogeneity? (4) What abiotic and biotic local site conditions are most important in structuring establishment patterns? (5) Does the abiotic setting become more important with increasing upslope distance from the forest line? Location: Western slopes of Mount Rainier, USA.

Invasive pathogen threatens bird-pine mutualism: Implications for sustaining a high-elevation ecosystem

Publications Posted on: October 19, 2009
Human-caused disruptions to seed-dispersal mutualisms increase the extinction risk for both plant and animal species. Large-seeded plants can be particularly vulnerable due to highly specialized dispersal systems and no compensatory regeneration mechanisms. Whitebark pine (Pinus albicaulis), a keystone subalpine species, obligately depends upon the Clark's Nutcracker (Nucifraga columbiana) for dispersal of its large, wingless seeds.