Abstract
We conducted a field-based test of the widely available generic computer simulation model VORTEX for population viability analysis (PVA). The model was used to predict the abundance of three species of arboreal marsupials in a system of 39 remnant patches of Eucalyptus forest embedded within a 5050-ha area of exotic radiata pine (Pinus radiata) forest in southeastern Australia. The marsupial species were: greater glider (Petauroides volans), mountain brushtail possum (Trichosurus caninus), and common ringtail possum (Pseudocheirus peregrinus). Predictions were generated for scenarios in which: (1) the rate of exchange of animals between patches was varied, (2) different models for the migration of animals between habitat patches were invoked, (3) different levels of immigration (or dispersal) from a large, neighboring source area were simulated, (4) variations in habitat quality between remnant patches were incorporated in the model, and (5) the influence of the pine matrix surrounding the remnant patches...
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