Laserfiche WebLink
• RESULTS <br />Data from the 1997 revegetation monitoring studies at the Seneca II-W Mine are presented in <br />Tables 1, 2, and 3 contained in Appendix 1. The list of plant species observed during these <br />studies (reclaimed and reference areas) are included in Table 8 in Appendix 2. Seed mixes <br />applied on areas revegetated in years 1991 through 1993 are included for reference in <br />Appendix 3. Site data from sample transects (orientation, slope, aspect, and initials of <br />samplers) are included as Table 9 in Appendix 4. Photographs of representative locations <br />within the 1991/1993 Reclaimed Area sampled in 1997 are included in Appendix 5 <br />In the following descriptions, species that were encountered quantitatively (i.e. "hit" by a sample <br />point) are described first for a particular lifeform. Species listed as "also present" were not hit <br />but were present within one meter to either side of the sample transect. <br />1991/1993 Reclaimed Area (Photographs 1 through 4) <br />Cover (Table 1) <br />Native perennial cool season grass was the dominant life form in this unit with 34.3 percent of <br />total vegetation cover. Agassiz bluegrass (Poa agassizensis) and mountain brome <br />(Ceratochloa carinata) together accounted for two-thirds of this average. Slender wheatgrass <br />(Elymus trachycaulus) was also an important contributor. Western wheatgrass (Pascopyron <br />smithii) thickspike wheatgrass (Elymus lanceolatus fm. dasystachya), and sheep fescue <br />(Festuca brachyphylla ssp. coloradensis) were all minor contributors. <br />Introduced annual and biennial (orbs averaged 32.6 percent of total vegetation cover. Twolobe <br />speedwell (Pocilla biloba) accounted for almost half of this average. Prickly lettuce (Lactuca <br />serriola) accounted for over one-fourth of this average. Russian thistle (Salsola australis), <br />devil's shoestrings (Polygonum arenastrum), and pennycress (Thlaspi arvense) were all minor <br />contributors to this average. Introduced annual grasses averaged 18.0 percent of total <br />vegetation cover. Japanese brome (Bromus japonicus) accounted for nearly all of this total. <br />Cheatgrass (Anisantha tectorum) was a minor contributor. Native perennial fortis averaged 5.5 <br />percent of total vegetation cover. Blue flax (Adenolinum lewisii) accounted for over half of this <br />average. Introduced perennial cool season grasses averaged 4.7 percent of total vegetation <br />• cover. Smooth brome (Bromopsis inermis) and intermediate wheatgrass (Thinopyrum <br />intermedium) accounted for almost all of this average. <br />5 <br />