Northern Spotted Owl Scenario


Introduction

The HexSim northern spotted owl model is described in the following manuscript:

Schumaker NH, Brookes A, Dunk JR, Woodbridge B, Heinrichs J, Lawler JJ, Carroll C, and LaPlante D. 2014. Mapping sources, sinks, and connectivity using a simulation model of northern spotted owls. Landscape Ecology 29:579-592.

Workspace Details

The northern spotted owl workspace contains four very similar scenarios. Two incorporate environmental stochasticity and two do not. Similarly, two scenarios include neutral genetics and two do not. All four models are otherwise identical. The northern spotted owl model was developed before Event Groups (and many other modern features) were added to HexSim.

The northern spotted owl models are not particularly complex, and are therefore suitable for HexSim users with minimal experience. These models make use of four static Hexmaps, but do not utilize Generated Hexmaps.

Because the northern spotted owl population is in decline, the simulations begin with a very large population size. This is done to ensure that the initial population is well-distributed across the species' home range. Doing so ensures that observations of local extinctions are not a necessary consequence of the initial conditions. However, this makes the model run very slowly in the beginning -- it will speed up considerably as the population size declines to steady-state. HexSim Reanimation events are designed to address this issue, but the northern spotted owl models included in this workspace do not make use of this feature.