Skip to Main Content
Field survey of growth and colonization of nonnative trees on mainland Alaska.Author(s): John Alden
Source: Gen. Tech. Rep. PNW-GTR-664. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 74 p
Publication Series: General Technical Report (GTR)
Station: Pacific Northwest Research Station
Download Publication (3.06 MB)
DescriptionSix of nine nonnative boreal conifers in three genera (Abies, Larix, and Pinus) regenerated in 11 to 31 years after they were introduced to mainland Alaska. Lodgepole pine (Pinus contorta var. latifolia Engel.) and the Siberian larches (Larix sibirica Ledeb. and L. sukaczewii N. Dyl.) were the most widely introduced species and will likely be the first nonnative conifers to naturalize. Siberian larch grew up to six times more stem volume than white spruce in the first 40 years on upland sites, but was susceptible to the larch sawfly and a blue stain pathogen carried by bark beetles. On productive sites, lodgepole pine appeared to grow more stem wood than white spruce for about 35 years after planting. Snowshoe hares and moose were the most serious pests of the nonnative conifers. Balsam fir (Abies balsamea (L.) Mill.) was the only species to regenerate in an established moss understory. Growth and age relationships were negative for all adequately sampled nonnative conifers and positive for native white spruce (Picea glauca (Moench) Voss). Data were insufficient to assess niche availability for commercial use of productive nonnative conifers in mixed stands in Alaska. Survey results indicate that introduction and naturalization of noninvasive tree species may improve the diversity, stability, and productivity of managed forest ecosystems.
- You may send email to firstname.lastname@example.org to request a hard copy of this publication.
- (Please specify exactly which publication you are requesting and your mailing address.)
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
CitationAlden, John. 2006. Field survey of growth and colonization of nonnative trees on mainland Alaska. Gen. Tech. Rep. PNW-GTR-664. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 74 p
KeywordsAlaska, nonnative conifers, adaptation, regeneration, colonization, growth rates, wood yields, animal damage
- Evaluation of a post-fire tree mortality model for western US conifers
- Field studies of pine, spruce and aspen periodically subjected to sulfur gas emissions
- Severity of overstory mortality influences conifer recruitment and growth in mountain pine beetle-affected forests
XML: View XML