Forest Investment Account, Innovative Project 6886003 Sunshine Coast TSA and Project 6884002 Arrowsmith TSA, were undertaken in coastal British Columbia young, western hemlock (Tsuga heterophylla [Raf.] Sarg.) forests to monitor the seed dispersal of hemlock dwarf mistletoe (Arceuthobium tsugense (Rosendahl) G.N. Jones subspecies tsugense). The goal of the monitoring projects is to provide baseline data that facilitate sustainable management of retention-harvested, mistletoe-infested coastal forests. Seed traps were established at 5m, 10m, 15m and 20m distance from three residual, mistletoe-infested trees: two near the previously established monitoring plot at Wilson Creek near Sechelt in the Sunshine Coast TSA, and one tree (Tree II) previously sampled at block UC5C, near Ucluelet, in the Arrowsmith TSA. Numbers of mistletoe seeds caught were 35 and 122 at the two trees at Wilson Creek, and 7 at block UC5C. Most mistletoe seeds were caught on the traps set at 5m from the source trees.
At Wilson Creek, the numbers of seeds decreased logarithmically with increasing distance from the source trees. No seeds were caught on the traps set at 20m from the source trees at Wilson Creek and none on the traps at 15 and 20m at UC5C. A summary of previous results from the mistletoe monitoring projects from January 2005 to March 31, 2009 is appended.