Figure 1. Average (± SE) tree seedling density of Picea sitchensis and Tsuga heterophylla (A) bryophyte depth (B), percent canopy cover (C), percent cover of Rhizomnium glabrescens(D), percent cover of Hylocomium splendens (E) and percent cover of Antitrichia curtipendula (F) on the forest floor (n = 12) and each decay class of nurse logs (NL 1 = nurse log decay class 1, n = 31; NL 2 = nurse log decay class 2, n = 30; NL 3 = nurse log decay class 3, n = 25) in a northern temperate rainforest, Olympic peninsula, WA. Bryophyte depth was missing from one plot. Substrate type significantly influenced bryophyte depth (F _3,93 = 6.6, P< 0.001). Substrate type significantly influenced percent cover of H. splendens (F _3,94 = 17.8,P < 0.001).