Ecological Archives A022-019-A2

Shane Blowes and Sean Connolly. 2012. Risk spread, connectivity, and optimal reserve spacing. Ecological Applications 22:311–321.

Appendix B. Sensitivity analysis.

TABLE B1. Parameter values for which sensitivity analyses were conducted. Sensitivity analyses were conducted on all parameters separately; individual parameters were allowed to vary systematically, with the remaining parameters held constant.

Parameter Range for sensitivity analysis
Expectation of per-capita
fecundity (E[ln(f)])
[-0.1, -0.001, 0.01, 0.1]
Variance in per-capita
fecundity (var[ln(f)])
[1, 2.2, 3, 4]
Range parameter of environmental
covariance function (Φ)
Φexp = 5√3/6 - 10√3/3
ΦGau = 2.5 - 10



FIG. B1. Effect of changes to the expectation of per-capita fecundity on the trade-off between connectivity and environmental covariance shown for: (A) Laplacian dispersal and Gaussian covariance, (B) Laplacian dispersal and exponential covariance, (C) Gaussian dispersal and covariance, (D) Gaussian dispersal and exponential covariance.




FIG. B2. Effect of changes to the variation in per-capita fecundity on the trade-off between connectivity and environmental covariance shown for: (A) Laplacian dispersal and Gaussian covariance, (B) Laplacian dispersal and exponential covariance, (C) Gaussian dispersal and covariance, (D) Gaussian dispersal and exponential covariance.




FIG. B3. Effect of changing the range parameter (Φ) on the trade-off between connectivity and environmental covariance shown for: (A) Laplacian dispersal and Gaussian covariance, (B) Laplacian dispersal and exponential covariance, (C) Gaussian dispersal and covariance, (D) Gaussian dispersal and exponential covariance.


[Back to A022-019]