The importance of inverse density dependence in population viability analysis: an example using threatened woodland caribou in Canada
- University of British Columbia, Vancouver, B.C., Canada
- Ministry of Forests, Revelstoke, B.C., Canada
Population viability analysis (PVA) refers to a group of analytical and modelling approaches for assessing the risk of population extinction. PVA is commonly used to estimate absolute time to extinction or probability of persistence under either current or novel conditions. However, the amount of information of species specific biology as well as the dynamics of small populations needed to confidently estimate population persistence is high, a fact often overlooked in the light of increasing availability of easy-to-use software packages.