Table 2. Encroachment of the three major tree species in Chittenden Meadow since the 1946 aerial photo.

Species
No. trees
Calendar year
Standard
deviation (yr)
 
 
 
 
 
Minimum
Maximum
Mean
 
Grand fir
287
1950
1995
1980
6.5
Ponderosa pine
26
1967
1992
1981
8.0
Douglas-fir
132
1961
1992
1978
8.4
 
Total
445
1950
1995
1980
7.3