The effects of seed source health on whitebark pine (Pinus albicaulis) regeneration density after wildfireAuthor(s): Signe B. Leirfallom; Robert E. Keane; Diana F. Tomback; Solomon Z. Dobrowski
Source: Canadian Journal of Forest Research. 45: 1597-1606.
Publication Series: Scientific Journal (JRNL)
Station: Rocky Mountain Research Station
View PDF (1.0 MB)
Whitebark pine (Pinus albicaulis Engelm.) populations are declining nearly rangewide from a combination of factors, including mountain pine beetle (Dendroctonus ponderosae Hopkins, 1902) outbreaks, the exotic pathogen Cronartium ribicola J.C. Fisch. 1872, which causes the disease white pine blister rust, and successional replacement due to historical fire exclusion practices. With high mortality in cone-bearing whitebark pine, seed production may not be sufficient to support natural regeneration after disturbance such as wildfire. Our objective was to examine the relationship between whitebark pine seed source health and whitebark pine regeneration density in adjacent burns. We sampled regeneration and seed source health in 15 burns within six national forests and three Wilderness Areas in Montana, ranging from 5 to 23 years old. We found a significant, positive relationship between seed source health and seedling density in adjacent burns. Natural regeneration was sparse when the proportion of damaged or dead whitebark pine in the seed source exceeded 50%. Factors that influenced the presence of whitebark pine regeneration within a burn included both vegetation cover and potential solar radiation. Sites closer to seed sources had higher probabilities of seedling occurrence, but seedlings were present throughout most burns. Our results suggest that managers can prioritize restoration plantings of whitebark pine seedlings after wildfire based on the health status of the nearest seed sources.
- 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.
Leirfallom, Signe B.; Keane, Robert E.; Tomback, Diana F.; Dobrowski, Solomon Z. 2015. The effects of seed source health on whitebark pine (Pinus albicaulis) regeneration density after wildfire. Canadian Journal of Forest Research. 45: 1597-1606.
KeywordsPinus albicaulis, postfire regeneration, wildfire, white pine blister rust, mountain pine beetle
- The influence of white pine blister rust on seed dispersal in whitebark pine
- A 20-year reassessment of the health and status of whitebark pine forests in the Bob Marshall Wilderness Complex, Montana
- Strategies for managing whitebark pine in the presence of white pine blister rust [Chapter 17]
XML: View XML