Table 1 Abundances and demographic rates in the 50 ha plot in eight censuses, or seven census intervals (rates appear beneath the second census of an interval)
From: Demographic trends and climate over 35 years in the Barro Colorado 50 ha plot
Demographic measure | Category | 1982 | 1985 | 1990 | 1995 | 2000 | 2005 | 2010 | 2015 |
|---|---|---|---|---|---|---|---|---|---|
Observed individual density (ha −1) | Sapling | 4285.1 | 4424.1 | 4453.7 | 4149.8 | 3849.8 | 3748.7 | 3726.9 | 3734.8 |
Tree | 416.1 | 412.9 | 423.5 | 428.0 | 422.8 | 416.0 | 414.6 | 415.3 | |
Median species abundance (50 ha) | Observed sapling | 135.0 | 115.0 | 109.5 | 99.0 | 90.0 | 90.5 | 104.5 | 104.5 |
Fitted sapling | 134.0 | 126.2 | 114.8 | 105.3 | 101.3 | 105.2 | 109.2 | 113.5 | |
Observed tree | 31.0 | 30.0 | 28.5 | 27.5 | 29.5 | 30.5 | 29.0 | 30.0 | |
Fitted tree | 31.3 | 31.1 | 30.9 | 30.7 | 30.4 | 30.1 | 29.9 | 29.6 | |
Mortality rate (% ·yr −1) | Observed sapling | 2.64 | 2.24 | 2.55 | 2.81 | 2.36 | 2.37 | 2.44 | |
Fitted sapling | 4.81 | 4.76 | 4.70 | 4.65 | 4.61 | 4.57 | 4.54 | ||
Observed tree | 2.73 | 1.95 | 1.87 | 2.08 | 2.29 | 2.26 | 2.46 | ||
Fitted tree | 3.27 | 2.60 | 2.49 | 2.63 | 2.78 | 2.92 | 3.07 | ||
Median growth rate (mm ·yr −1) | Observed sapling | 1.18 | 0.98 | 0.62 | 0.60 | 0.60 | 0.61 | 0.78 | |
Fitted sapling | 1.17 | 0.82 | 0.50 | 0.58 | 0.67 | 0.78 | 0.89 | ||
Observed mid-sized tree | 1.70 | 1.34 | 1.04 | 1.00 | 1.01 | 1.00 | 1.16 | ||
Fitted mid-sized tree | 1.80 | 1.44 | 1.14 | 1.21 | 1.29 | 1.37 | 1.45 | ||
Observed large tree | 5.69 | 3.56 | 2.74 | 2.80 | 2.78 | 2.66 | 2.75 | ||
Fitted large tree | 6.05 | 3.70 | 2.76 | 2.82 | 2.88 | 2.94 | 3.00 |