Table 1 — Average number of tree seedlings per acre, percentage occurrence per acre, and 



average number of years to establishment after disturbance for tree seedlings in the 

 Douglas-fir/white spirea, grand fir/mountain maple, and grand fir/blue huckleberry 

 habitat types 



Average number 





Average number 





of years to 





Tree 



of seedlings 



Percent of 



establishment 



Range of years 



species 



per acre 



total sample 



after disturbance 



to establishment 





Douglas-fir/White Spirea Habitat Type 





Lodgepole pine 



44 



12 



3 



1 - 14 



Ponderosa pine 



87 



24 



5 



- 18 



Douglas-fir 



238 



64 



9 



- 25 



Total 



369 



100 



2 7 







Grand Fir/Mountain Maple Habitat Type 





Lodgepole pine 



5 



1 



2 



- 5 



Western larch 



21 



4 



1 



- 14 



Ponderosa pine 



51 



11 



5 



- 13 



Douglas-fir 



144 



30 



7 



- 46 



Engelmann spruce 



25 



5 



3 



- 6 



Grand fir 



234 



49 



7 



- 30 



Total 



480 



100 



6 







Grand Fir/Blue Huckleberry Habitat Type 





Lodgepole pine 



29 



6 



9 



2 - 20 



Ponderosa pine 



38 



8 



11 



3 - 19 



Douglas-fir 



90 



19 



8 



- 19 



Engelmann spruce 



81 



17 



7 



- 22 



Grand fir 



237 



50 



9 



- 29 



Total 



475 



100 



9 





'0 years to establishment means that seedlings established in the same year that disturbance took place. 

 2 Weighted average. 



Table 2— Percentage occurrence of natural tree seedlings by seedbed with regeneration efficiencies (RE) 1 classes of seedbeds for 

 Douglas-fir/white spirea, grand fir/mountain maple, and grand fir/blue huckleberry habitat types 



Scarified soil 



Rocks 



Species Litter-cover Bare Moss mat Rotten wood Residual duff or stumps 









RE 





RE 





RE 





RE 







RE 







RE 





Per 



class 2 



Pet 



class 



Pet 



class 



Pet 



class 



Per 





class 



Pet 





class 











Douglas-fir/White Spirea Habitat Type 

















Lodgepole pine 



64 





3 



36 



3 























Ponderosa pine 



38 





2 



47 



4 



13 



5 



2 



4 















Douglas-fir 



63 





3 



29 



3 



6 



4 



1 



3 



1 





2 









Seedbed 

































occurrence 3 





63 





29 







2 



<1 







4 







<1 













Grand Fir/Mountain 



Maple Habitat Type 

















Lodgepole pine 



25 





2 



25 



3 



56 



5 



















Western larch 



17 





1 



49 



4 



28 



5 



6 



5 















Ponderosa pine 



69 





3 



13 



3 



16 



4 



2 



3 















Douglas-fir 



52 





3 



25 



3 



21 



4 



1 



2 



1 





4 









Engelmann spruce 



50 





2 



18 



3 



27 



5 



5 



4 















Grand fir 



65 





3 



14 



2 



18 



4 



2 



3 



1 





5 









Seedbed 

































occurrence 





67 





22 







8 



2 







<1 







<1 













Grand 



Fir/Blue Huckleberry Habitat Type 

















Lodgepole pine 



30 





2 



50 



5 



20 



4 



















Ponderosa pine 



31 





2 



38 



4 



23 



4 



8 



4 















Douglas-fir 



59 





3 



19 



3 



16 



3 



6 



4 















Engelmann spruce 



46 





2 



3 



1 



45 



5 



3 



3 



3 





4 









Grand fir 



63 





3 



10 



2 



10 



3 



15 « 



5 



2 





3 









Seedbed 

































occurrence 





67 





15 







13 



2 







2 







<1 





1 Regeneration efficiency is the percentage occurrence of the seedling species divided by the percentage occurrence of the safe site component. 

 2 Class 1: to 0.25, very inefficient; class 2: 0.26 to 0.75, inefficient; class 3: 0.76 to 1.50, efficient; class 4: 1.51 to 3.00, moderately efficient; class 5: 

 3.01 and greater, very efficient. 

 3 Seedbed occurrence is the percentage occurrence of a seedbed over all microplots. 



3 



