Flora and Insects have a Spark, Mind, Body and Soul. The Spark gives them energy to be alive. The mind leads their life cycle, their body is their form & inherent physical abilities, and their soul is the skills they have to function within their ecosystem.
An example of this is how pollinators collect and distribute pollen throughout flora and how tree roots can communicate with nearby flora. Making honey, producing fruit, producing medicine - all of these are things the soul does for flora and insects.
Sometimes, Thieves will take the Spark or Soul of a flora or insects which causes them to become invasive. They begin sucking the Sparks or Souls from surrounding flora or insects in order to try and replace theirs and thus cause a major upset in the ecosystem. These invasive flora and insects can only steal sparks OR souls, not both, and they often mutate in destructive ways.