Table 4» — Mice and shrews per 3-dav trapping period (number ca\^ght) 



1955 Mice Shrevra 



6/27/55 

 6/28/55 

 6/29/55 



Total 

 Per 100 trap-days 



7/27/55 

 7/28/55 

 7/29/55 



Total 

 Per 100 trap-days 



8/17/55 

 8/18/55 

 8/19/55 



Total 

 Per 100 trap-days 



9/13/55 

 9/1A/55 

 9/15/55 



Total 

 Per 100 trap-days 



2 





 1 





 1 

 3 



3 

 5.0 



4 

 6.7 





 2 







6 

 3 

 



2 



3.3 



9 

 15.0 



4 

 2 







1 

 1 

 1 



6 

 10.0 



3 



5.0 



2 

 1 

 2 





 

 2 



5 

 8.3 



2 



3.3 



Relative abimdance of v^ious seedbed types 



Type of seedbed is known to influence germination, survival, and growth of 

 tree seedlings. Some seedbeds are much more favorable than others (fig. 6), 

 Clearcutting associated with high-lead and tractor yarding creates all 

 types of disturbance to the forest floor. In addition, fragments of the 

 logged areas escape disturbance and the seedbed types which prevailed 

 beneath old-growth stands remain. In order to evaluate the potential of 

 any partic\ilar type of seedbed for establishment and growth of reproduc- 

 tion it is important to know its relative abundance. 



An attempt was begun in 1954 to classify seedbed conditions; first by 

 visual estimates and later by line transect samples. The results of these 

 first attempts were given in the 1954 annual report. In 1955 the line 

 transect sample method was modified to include the greater number of seed- 

 bed types which were being encoimtered. Transects were then run through 

 the entire yarded area of the Maybeso clear cut. The seedbed types and 

 their relative abundance are given in table 5. 



A study is presently being initiated to investigate germination, survival, 

 and growth of commercial tree seedlings on the most prominent of these 

 seedbed types under two principal drainage conditions; restricted drainage 

 and good drainage. 



20 



