Survival distribution functions varied among species for the entire 1 yr period (log-rank

x2 = 220.2, d.f. = 7, P < 0.001; Figure 2-1D), and within each of shorter intervals

(0-2 mo: log-rank X2 = 220.2, d.f. = 7, P < 0.001; 2-6 mo: log-rank X2 = 55.4, d.f. = 7, P <

0.001; 6-12 mo: log-rank 2 = 49.6, d.f. = 7, P < 0.001; Figures 2-1A to 2-1C). In

addition, species rankings of survival probability switched between intervals. Survival for

0-1 yr was determined mainly by survivorship during the first 2 mos, which differed from

survival in the following intervals. This is demonstrated by the high correlation between

the 0-2 mo period and the overall lyr survival, and the lack of correlation between the

0-2 mo period with both the 2-6 mo and the 6-12 mo periods (Table 2-1).

Damage Agents

 Vertebrate activity was the most common damage agent (Figure 2-2). Survival

functions differed significantly among damage agents calculated for all species combined

(log-rank X2 = 1496.9, d.f. = 4, P < 0.001; Figure 2-2A). In addition, damage agents

affected species differentially. The percentage of seedlings affected by vertebrate activity

after 1 yr ranged from 31% for Beilschmiedia pendula, to 65% for E. nesiotica (log-rank

72= 56.0, d.f. = 7, P <0.001; Figure 2-2B). However, there were more missing seedlings

of B. pendula than of the other species (log-rank 2 = 209.3, d.f. = 7, P <0.001; Figure

2-2C) and most of these events happened in the first four weeks after transplant. In B.

pendula, 87% of the seedlings would have been affected by vertebrate activity if all

missing seedlings were included in the vertebrate activity category. Tetragastris

panamensis, A. excelsum and, T rosea were the species most affected by disease.

Although, T. rosea, and A. excelsum were affected by disease mostly in the first 2 mos

after transplant, T panamensis had a constant intensity of infection (log-rank X2 =98.7,