RESULTS 



Age of Overstory Trees 



As determined by ring counts, the trees sampled in the Gros Ventre were relatively 

 old; none were less than 40 years of age, and the majority were between 81 and 120 years. 



The following tabulation shows the age distribution of sample trees: 



Age class Frequency 

 Years Percent 



<40 

 41-80 21 

 81-120 71 

 121-160 6 

 >160 2 



Mortality of Overstory Trees 



The combined sample from all plots totaled 2,332 live trees and 1,684 dead trees, 

 of which 86 had apparently died during the 1970 season. These data are transformed to 

 a per-acre basis (mean number of trees per acre) and presented in greater detail in the 

 following tabulation: 



Size class, in. d.b.h. Live trees Dead trees Died in 1970 



0.1- 6.0 196.6 290.6 11.2 



6.1-12.0 258.8 44.6 5.8 



12.1-18.0 11.0 1.6 .2 



Combined 466.4 336.8 17.2 



6 



