Predator-prey dynamics in patchy forests subject to fire and forestry disturbances

ChristianWiewelhove

UBC Okanagan

"Predator-prey dynamics in patchy forests subject to fire and forestry disturbances"

Our work focuses on modelling how predator-prey dynamics are affected by the frequency and impact of forest disturbances such as forestry and wildfires and the subsequent regeneration of the forest. Our focus is on the Goshawk- Pine Squirrel predator-prey system. The coastal subspecies of the Goshawk is listed as endangered and their preferred habitat, mature, dense coniferous forests, is commonly disturbed. Climate change is increasing the frequency and severity of wildfires as well as periods of drought and heavy rainfall, leading to new challenges for sustaining Goshawk habitat. We present a modelling approach examining the dynamics of Goshawks and Squirrels within a disturbed landscape, and determine how different types of disturbance affect persistence of both species. An additional complicating factor that we take into account is the territoriality of Squirrels and Goshawks. Ultimately, we hope that the final model will inform conservation efforts for the Goshawk and, more generally, for predator-prey systems that rely on mature forest.
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