The health of foundation species promotes the stability of the ecosystems that depend on them

Anyone who's read "The Lorax" will recognize that certain species serve as the foundation of their ecosystems. When the truffula trees disappear, so to do the swomee-swans and bar-ba-loots. However, the same is not necessarily true the other way around.

source https://www.lifetechnology.com/blogs/life-technology-science-news/the-health-of-foundation-species-promotes-the-stability-of-the-ecosystems-that-depend-on-them