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• <br />Demonstration Ptots at Seneca II Mine <br />Plot 1. 13cm topsoil. <br />Surrace manipulation. Tubelings. <br />Plot 2. 50 cm topsoil. <br />Swfacemanipulatimt. Tubelings. <br />Plot 3. 50 cm topsoil. <br />Seed. <br />twice - Plot 4. Non-topsoilud. <br />Surface manipalation. Tubelings. <br />Plat 5. I S cm topsail. <br />Seeded. <br />,' 11 <br />u <br /> <br />Plot b. Non-tapsoilud. <br />Seoded. <br />O Photo point <br />Figure 3. Shrub establishment demonstration plots at Seneca II mine. <br />Results from the vegetation sampling indicate that most of the seeded species at Trapper <br />Mine have not yet established (Table 1). Most of the vegetative cover in demonstration plots at <br />Trapper was attributed to Russian thistle (Table 1), an annual invasive species. Plant cover was <br />higher in the deeper-topsoiled treatments and was similar between fenced and unfenced <br />treatments. Few shrubs were found in the shrub density and height surveys (Table 2). Drought <br />conditions after both the spring 2001 and fall 2001 seeding operations may have contributed to <br />the lack of establishment. <br />Results from Colowyo mine indicate that the autumn 2000 seeding operation was <br />successful as most of the seeded species were present on the plots in 2003 (Table 3). Lewis flax, <br />a seeded species has established in nearly all plots and continues to do particularly well in the 15 <br />cm topsoil plus surface manipulation treatment. The remaining seeded forb species are also well <br />established. The weedy invasive species Russian thistle is also well established but is unlikely to <br />be a persistent problem. Shrub species continue to establish well in the plots at Colowyo (Table <br />4). Mountain big sagebrush appears to have established well in most plots relative to other shrub <br />species. <br />The fall 2000 seeding at the Seneca II mine appears to have been somewhat successful. <br />Many of the seeded species were encountered in some of the plots at Seneca II in 2003 (Table 5). <br />Invasive weeds such as Russian thistle, yellow sweet clover and Japanese brome continue to <br />dominate most plots at Seneca II. Russian thistle and yellow sweet clover are not likely to be a <br />