peg KG 
SPRUCE IN MIXTURE 
THE forest on the Park has been described as a 
mixed selection forest composed of species which for 
the most part are extremely tolerant of shade.. The 
distribution of different species in different places is de-. 
termined primarily by the situation and soil. In local- 
ities suited to the growth of a number of species the 
factors which govern the preponderance of one tree 
overanother are: First.—Accidental distribution, under 
which head are grouped such facts as may result from 
the wind blowing in a particular direction just as ripe 
seeds are ready to fall, from a windfall taking place 
just before an abundant seed-year, or from similar acci- 
dental happenings by which one species is given special 
opportunities or advantages for reproduction. Second.— 
The peculiar power of each species to contend with its 
neighbors for space and light. As different trees start 
together or in succession on any given tract, the strug- 
gle for existence begins and will be determined by 
the power of the different species for carrying iton. It 
is the outcome of this struggle which fixes the char- 
acter of the forest, and in it without accidental aid the 
tolerant species must win in the long run. If the intol-: 
erant species can get the start, being often rapid of 
growth, they may hold their position by growing above 
22 
