RNGR.net is sponsored by the USDA Forest Service and Southern Regional Extension Forestry and is a colloborative effort between these two agencies.

U.S. Department of Agriculture USDA Forest Service Southern Regional Extension Forestry Southern Regional Extension Forestry

Skip to content. | Skip to navigation

Home → Publications → Climate Change / Assisted Migration → Tolerance of seedlings of ponderosa pine, Douglas-fir, grand fir, and Engelmann spruce for hight temperatures

Tolerance of seedlings of ponderosa pine, Douglas-fir, grand fir, and Engelmann spruce for hight temperatures

Seidel, K. W. 1986. Northwest Science, Volume 60, Number 1: 1-7
Journal Article
Transfer Guideline: Recommendation

Pacific Northwest, USA

The heat tolerance of 2- to 4-week old seedlings of ponderosa pine (Pinus ponderosa Dougl. ex Laws), Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco), grand fir (Abies grandis (Dougl. ex D. Don) Lindl.), and Engelmann spruce (Picea engelmannii Parry ex Engelm.) was determined and compared by exposing them to various time-temperature combinations in a "dry water bath" apparatus. Isosurvival curves indicating the time-temperature combinations that resulted in approximately equal survival were constructed for each species. Small (2 to 4 C) but significant differences in height tolerance were found among species with ponderosa pine having the greatest tolerance and Engelmann spruce the least. Douglas-fire and grand fir were generally intermediate in heat tolerance.