Native insects and microorganisms are key components in many ecological processes, such as nutrient recycling, decomposition, plant succession, natural pest control, and wildlife habitat. A woods devoid of insects and microorganisms would not be healthy; in fact, it would be nonfunctional.
A healthy woods is a functioning ecosystem with young, mature, and dead trees. Key qualities of a healthy woods are high diversity, resiliency to stresses, and sustainable benefits (for example: recreation, wildlife habitat, clean water, and timber).