Everett, Richard L.; Koniak, Susan; Budy, Jerry D. Pinyon seedling distribution 

 among soil surface microsites. Research Paper INT-363. Ogden, UT: U.S. 

 Department of Agriculture, Forest Service, Intermountain Research Station; 

 1986. 3 p. 



A highly variable number of pinyon seedlings (X" = 5,480 seedlings/ha, CV = 

 126 percent) occurred in fully stocked singleleaf pinyon (Pinus monophylla)-U\.ah 

 juniper (Juniperus osteosperma) stands. Pinyon seedlings were always more 

 numerous (87 percent) on soil surface microsites adjacent to the tree than in 

 the interspace between trees. Pinyon depends upon a standing crop of seed- 

 lings rather than soil seed reserves for species perpetuation. Seedling numbers 

 rapidly decline following tree harvest. Seedlings in fully stocked stands may be 

 of limited importance to species perpetuation because of tree longevity. 

 But the concentration of seedlings in juxtaposition to the parent tree improves 

 opportunities for management of natural regeneration by slash disposal or burn 

 treatments. 



KEYWORDS: singleleaf pinyon, regeneration, stocking rate 



