. Bulletin. Science. Annuals PerHerbs Shrubs Suffrutes Old Topanga (PC2) Total = 115 %. Annuals PerHerbs Shrubs Suffrutes Fig. 2. Continued. inatus were recorded from four of the Old Topanga sites and none were recorded from the Green Meadow sites. Poor establishment of this native species is likely due to two factors. (1) This species represented only a minor proportion of the seed mix (Table 1), and (2) this species is not typically found on burned sites in this region; no published postfire studies in the Santa Monica Mountains have reported Bromus carinatus (, Radtke 1981; O'Leary 1984
. Bulletin. Science. Annuals PerHerbs Shrubs Suffrutes Old Topanga (PC2) Total = 115 %. Annuals PerHerbs Shrubs Suffrutes Fig. 2. Continued. inatus were recorded from four of the Old Topanga sites and none were recorded from the Green Meadow sites. Poor establishment of this native species is likely due to two factors. (1) This species represented only a minor proportion of the seed mix (Table 1), and (2) this species is not typically found on burned sites in this region; no published postfire studies in the Santa Monica Mountains have reported Bromus carinatus (, Radtke 1981; O'Leary 1984; Keeley and Keeley 1984; O'Leary and Westman 1988; Conard et al. 1995). Further, while some native bunchgrasses such as Nasella lepida are common on burned sites, their presence is due to resprouts, with seedling regeneration occurring in subsequent years on most sites (Keeley, unpublished data), suggesting that in general our native grasses may be poor choices for seed mixtures. Very likely a contributing factor to low establishment of seeded species was the below average rainfall, which, during the months prior to sampling, was 21% below average (see Study Sites Section). Nonetheless, there was sufficient rainfall to support establishment of significant native cover on most sites (Fig. 1). In summary, the natural regeneration far exceeded that attempted through aerial seeding; by two orders of magnitude on most sites. These sites were monitored throughout the spring growing season, and although total cover increased (see. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Southern California Academy of Sciences. Los Angeles, Calif. : The Academy
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