Which means they must have moderate and high intensity fire to effectively reproduce. Hot fires will kill mature trees, including sequoias, but this is necessary to create the bare mineral soil and open canopy that allow Sequoia seedlings to be born and thrive.

Patches of high intensity fire in mature and old forest create one of the richest forest habitat types ("complex early seral forest"), with abundant standing dead trees (snags), native shrubs, downed logs and naturally regenerating conifers essential to healthy and productive wildlife populations.

Blacked Backed Woodpeckers like their mature and old growth forest well done. Each bird eats over 13,500 wood boring beetle larvae per year to survive - this means lots of dead trees (over 100 per acre) covering a large area (approximately 300 acres per pair).

Spotted owls prefer unburned mature forest or mature forest that burns at lower intensity for nesting and roosting, but use mature forest that burns at high intensity to hunt the small mammals that they need to eat to survive. Without this habitat in their territories, populations decline.

Once thought to avoid higher intensity fire areas, it has been found to select dense old forest in both its unburned state (for denning and resting) and after it is burned in a higher intensity fire (for hunting small mammals).