Tools & Data

Annual trajectories and population abundances for bald eagles

EaglePOPd: In-depth look at Bald Eagle population dynamics from the perspective of veterinary science

Ever wonder whether veterinary maladies that act on individuals equate to a population scale impact? Here, we draw upon equations in population matrix models to assess if or how veterinary maladies drive population trends.
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IsoPOPd: Theoretical Population Modeling for Understanding Growth Rates

Demographers use eigenvalues to assess population viability of wildlife. But what is an eigenvalue? And how is it calculated? Do our management actions cause the eigenvalue to change? Our interactive IsoPOPd app demonstrates how vital rates collapse into the growth rate via a single balance equation. Use the interactive app to increase your understanding of how management activities that modify one vital rate not only change the growth rate, but how that same management activity translates to change that ripples through the system.
Image of Stage structured population model_interim trajectories

StallPOPd: Applied Population Modeling for Halting the Growth of a Subsidized Predator

When population growth of a subsidized predator skyrockets, what can be done to mitigate the impacts to its vulnerable prey? Population matrix models can help identify strategies to combat the population growth of opportunistic predators
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StaPOPd: Applied Stable Population Theory for Wildlife Species Reintroduction

When wildlife populations become too small to remain stable or when they have disappeared entirely, reintroduction can be a key to a successful recovery. But how many animals should be introduced? Stable population theory can help determine that.

Technical Documents