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<br />Although there is a desire to redevelop a good tree cover on this slope, there appears to <br />be a question as to whether that is really possible without significant removal of the <br />competitive influence of grasses and shrubs. If the removal of the trees altered the <br />environment such that the grasses and shrubs can capitalize on the resources formerly <br />consumed by the trees, is tt r rstic to expect significant tree cover to return to the site in any <br />reasonable amount of tirr~ Because Douglas Fir does tend to develop in a shaded <br />environment and later becom dominant, transition to Douglas Fir is probably possible in time. <br />However, trees that are co partitively intolerant of shade as seedlings (e.g. Pinyon Pine) will <br />probably not succeed. T s process of restoring tree cover, however, may take many decades <br />as competition from gra sand shrubs, even for Douglas Fv invaders (or planted seedlings), <br />will be very intense. , <br />I 9 ~ ~' <br />~~~5 , lw U/1~ <br />~• r <br />~,,,` <br />Page 3 of 3 1992 Annual Report Supplement M-77-210 Snyder Quarry <br />