Seeding habits of upper-slope tree species

The Blue Lake noble fir plot is one of 52 plots established in the early and mid-1960’s throughout the Washington and Oregon Cascades to do a long-term study of the cone production of upper-slope conifers. Initially the objective was to characterize the size and frequency distribution of cone crops of important upper-slope tree species. Early results indicated that the pattern of cone production varies with geographic location, so a secondary objective to describe this variation was adopted. Another new objective is to describe how climate influences cone production. With the possibility of global warming this objective may become the most important.

 

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