2010-07-15_REPORT - M1988044 (2)

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Western wheatgrass (co-dominant) Blue grama (co-dominant) Horseweed Sophia Downy brome Russian thistle Kochia Alyssum Hairy golden aster Sunflower Needlegrass Fringed sage Salsify Prickly lettuce Bull thistle Oat Evening primrose Butterfly weed Lupine Fleabane Prickly poppy Scotch thistle (being controlled) Canada thistle (being controlled) Cocklebur Cottonwood E. Status of older revegetation as of report date (describe growth rates, cover, invasive species, native invasion, and difficulties) - Older revegetation sites on either side of the main road exhibit similar patterns of development with respect to the year they were planted. Those relationships to the year planted are due to variations in the specific conditions that acted to select certain species. However, it appears that the trends in development on each of these sites are convergent, that is, they are developing along different pathways but species composition appears to be trending toward a common end point with needlegrass, wheatgrass, blue grama dominance qualitatively similar to the undisturbed adjacent vegetation. The two areas on the east side of the main road planted in 2007 have already achieved a high dominance of needlegrass with blue grama a close secondary dominant and wheatgrass a distant third co-dominant. Considering the sandy nature of the soil in these two areas, that pattern is according to expectation. The areas planted in 2008 have followed different pathways with the larger revegetation area to the south being most divergent due to the presence of somewhat more clay in the growth medium. Species diversity is highest where there is some clay in the growth medium. Vegetation on more sandy soils develop along pathways similar to the 2007 planted areas. A clear differentiation of dominance has not yet been established on the 2008 plantings. A species list follows. Status report for 2009 due July 15, 2010 Page 8 of 11