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<br />Mortality and Plant Competition <br />50 <br />• aspen <br />rn 40 ----------------- ? ------------ <br />? -r---serviceberry <br />a 30 ------------------------------ <br />0 20 -- ----------- W -- ! <br />10 -- ----------- -------------- <br />0- 1 <br />0 50 100 150 <br />Biomass of Competing Vegetation, gm <br />• <br />Figure 3. Relationship of plant mortality to biomass of competing vegetation. Plots <br />with the highest mortality aspen were from the Yoast site. <br /> o2WSa <br />Percent Aspen Survival by Site ¦2WSb <br />100% ?Y1 <br /> <br /> o Y 2a <br />90% ® Y 2b <br />80% <br />70% <br />60% <br /> <br />50% <br />a <br />40% <br />30% <br />20% <br />10% <br /> <br /> <br /> Ir n T No <br />b tlo n Irrigat ion No Irrig ation <br /> Fabr ic Fa <br />r ic No Fab ric <br />Figure 4. Aspen survival by site location in response to landscape fabric and <br />irrigation. Note Yoast 2a and 2b had the most competing vegetation biomass. <br />