The only exception to this is the large number of big-leaf maple seedlings which appear briefly each spring, and which are all dead within a matter of weeks. This year, due to unprecedented amounts of spring time rain, these seedlings are still doing well. I will report on their survival at ground zero over the summer months.
In addition to the ad hoc nitrogen sampling reported earlier on this blog, and the tree canopy Lobaria oregana nitrogen sources reported by Bill Dennison from the Andrews Experimental Forest, there has been related research by the Reimchen lab at the University of Victoria, suggesting - in some circumstances - that salmon can be a nitrogen source.
