ARCHIVED REPORTS 2009 YEAR 3 PHYTOEMEDIATION TREE MONITORING REPORT

Home Browse Search

' SECTION 4:YEAR 3 TREE MONITORING RESULTS ' health and vigor score calculated in 2008. Addition to Area A also had an average health and vigor score of 2.4. Year 3 (2009) ' As shown in Table 4-1,the tree survivorship rate in this planting area decreased slightly in Year 3 (from 88 percent in Year 2 to 86 percent in Year 3).Three box elder trees, one red willow, and two cottonwood trees died in Year 3 (or 6 out of 42 trees) (Appendix A). All of ' the box elders were within the higher planting zone, and drought stress may have been a contributing factor.However, the site was subjected to very high winds in mid-October 2009.Two cottonwoods and one red willow were uprooted during this windstorm.One box ' elder in this general area is presumed dead but this cannot be confirmed because it is not visible beneath the fallen trees. The average heath and vigor score for Area A in Year 3 is 2.5 (Table 4-2).The adjacent ' planting area,Addition to Area A, also had an average health and vigor score of 2.5. A score of 2.5 was the highest health and vigor score calculated in Year 3 (2009). Tree health and vigor appear to be relatively stable in this planting area,based on the similarity of scores ' recorded in Year 1 (2.6),Year 2 (2.4),and Year 3 (2.5) (Table 4-2). ' 4.2 Addition to Area A This planting area is composed of three distinct planting zones (higher,middle, and lower). Six species of trees (and a total of 42 trees) were planted in this area. This area was added during plant installation; therefore, this sub area and planting zones are not depicted in Figure 1-3,Planting Plan. This planting area is shown on Figure 1-4,Actual Planting Layout. ' Year 1 (2007) Two trees,one box elder and one Fremont cottonwood (out of a total of 60 trees), died in this planting area. The average percent survivorship was 97 percent(Table 4-1). This sub area has the highest plant survivorship of all six planting areas.The average heath and vigor score is 2.2,which is slightly higher than a"medium' rank. ' Year 2 (2008) Limited replanting in the Addition to Area A planting sub area was conducted in 2007 to replace trees killed by beavers. As shown in Table 4-1, plant survivorship increased between 2007 and 2008 (from 97 percent in Year 1 [2007) to 100 percent in Year 2 [20081).The average heath and vigor score in Year 2 (2008) was 2.4, slightly higher than the 2007 rank of 2.2. A ' score of 2.4 is roughly in between "medium" and "high" ranks. Year 3 (2009) ' As shown in Table 4-1, plant survivorship in this planting area decreased slightly between Year 2 (2008) and Year 3 (2009) (from 100 percent in Year 2 to 97 percent in Year 3).This rate of survivorship (97 percent) is the highest calculated for all planting areas in Year 3 (2009) ' (Table 4-1).Two Fremont cottonwoods died in this planting area in Year 3 (2 out of 60 trees). One tree was uprooted during the mid-October windstorm and the other tree was likely damaged by beavers. ' SACI166749IPANAGON(YEAR3_2009 HOLTTREE_MONITORING_REPORT.DOC) 4-3