Background germination and seed processing techniques:
Seedling counts were greater at HD than HR and were significantly
greater in planted cells than unplanted control cells at both sites
(Fig. 2; common garden x cell type: p-value = 0.006). However, while
background germination was essentially negligible at HR (0.01 mean
seedlings per unplanted control cell), there was a mean of 1.5 seedlings
per control cell at HD (Fig. 2). Neither of our seed processing
techniques intended to facilitate seed extraction (soaked and sheathed)
caused planted seeds to germinate at a different rate than untreated
seeds (p 0.12; Appendix B). Thus, we included all seed treatment subsets
and untreated seeds together in further analyses.