Laserfiche WebLink
• <br />Seneca IIW Precipitation 2008 <br />0. cumulative total 3.05 inches <br />• <br />e <br />c 0.6 — <br />0.5 <br />CL y — <br />d <br />Tot 0.4 — <br />m � i <br />a 0.3 • — <br />0.2 <br />0.1 ♦ — ♦ -- 7 —141-- • 40— <br />0 <br />170 180 190 200 210 220 230 240 250 260 270 280 290 <br />Day of Year <br />Figure 7. Ambient rainfall at the IIW study site. <br />Terminal leader growth and stem diameter (caliper) data were not normally <br />distributed, and therefore a Gaussian or lognormal transformation was conducted on <br />the original data prior to statistical analysis. The data were analyzed using SAS GLIMMIX <br />(mixed model) analysis. <br />Survival was related to biomass of competing vegetation for aspen, but not for <br />Is serviceberry (Figure 8). Mortality averaged about 20% for serviceberry, regardless of <br />treatment. Mortality of aspen varied from about 10% to 45% and was highly related to <br />r� <br />U <br />biomass of competing vegetation. The response varied greatly by site (Figure 9), and <br />survival was apparently related to the amount of surrounding vegetation that competed <br />with aspen for water. The highest competing vegetation biomass and the highest aspen <br />mortality were in Yoast Blocks 1 and 2 that were in the same fenced area. Serviceberry <br />plants were smaller, suggesting it took less water for them to survive. <br />18 <br />