Limiting Factors

Density-Independant:
Wild Fires, Deforestation, earthquakes, extreme temperatures, drastic decrease in producers during winter.
One such limiting factor througout taiga is temperature. Many species cannot survive the winters which taiga experiences. Cold temperatures will generally afftect small and large populations the same. Another limiting factor is a volcanic explosion. Plants and animals will be affected the same regardless of their population size.

Density-Dependent:
In thick boreal forest, a density-dependent limiting factor can be light, which often won't reach the ground until a tree falls. Saplings will also have limited space to grow in this scenario.