Table 2. Estimates of the sensitivity (Sv) and elasticity (Ev) of the finite rate of population growth in a constant environment, λ1, to changes in the underlying vital rates (θv) for the boreal forest, prairie-parklands, and the two regions combined (composite). In addition, estimates of the sensitivity and elasticity of the stochastic population growth rate (λs) to changes in the underlying vital-rate means (Sv, stochastic and Ev, stochastic, respectively), and to changes in the temporal variation (measured with the process standard deviation) of each vital rate (Sσv, process and Eσv, process, respectively) for the stochastic version of the composite model.
| |
| |
| θv |
Sv |
|
|
|
|
Ev |
|
|
|
| |
Boreal Forest |
Prairie-Parkland |
Composite |
|
Sv, stochastic |
Sσv,
process |
|
Boreal Forest |
Prairie-Parkland |
Composite |
|
Ev, stochastic |
Eσv, process |
| |
| BPSY |
0.073 |
0.170 |
0.119 |
|
0.077 |
-0.0011 |
|
0.069 |
0.114 |
0.089 |
|
0.061 |
-0.0001 |
| BPASY |
0.193 |
0.295 |
0.254 |
|
0.214 |
-0.0050 |
|
0.232 |
0.265 |
0.250 |
|
0.224 |
-0.0004 |
| CSSY |
0.007 |
0.014 |
0.010 |
|
0.007 |
-0.0001 |
|
0.069 |
0.114 |
0.089 |
|
0.061 |
-0.0001 |
| CSASY |
0.019 |
0.026 |
0.024 |
|
0.020 |
-0.0004 |
|
0.232 |
0.265 |
0.250 |
|
0.224 |
-0.0003 |
| RPSY |
0.033 |
0.070 |
0.050 |
|
0.025 |
-0.0004 |
|
0.004 |
0.006 |
0.005 |
|
0.003 |
-0.0001 |
| RPASY |
0.103 |
0.153 |
0.133 |
|
0.089 |
-0.0029 |
|
0.026 |
0.029 |
0.028 |
|
0.020 |
-0.0005 |
| NS |
0.606 |
0.969 |
0.810 |
|
0.814 |
-0.1722 |
|
0.284 |
0.357 |
0.319 |
|
0.261 |
-0.0508 |
| DS |
0.643 |
0.704 |
0.667 |
|
0.589 |
-0.0995 |
|
0.301 |
0.379 |
0.339 |
|
0.285 |
-0.0250 |
| JS |
0.449 |
0.730 |
0.606 |
|
0.498 |
-0.0570 |
|
0.301 |
0.379 |
0.339 |
|
0.285 |
-0.0100 |
| BS |
0.988 |
1.342 |
1.222 |
|
1.161 |
-0.1160 |
|
1.000 |
1.000 |
1.000 |
|
1.000 |
-0.0102 |
| NBS |
0.837 |
0.855 |
0.840 |
|
0.859 |
-0.0548 |
|
0.699 |
0.621 |
0.661 |
|
0.715 |
-0.0048 |
|
| |
|