What is the vital lesson regarding the status of a keystone species identified by ecologists?

Answer

Their importance is strictly local and situational.

Ecologists have noted that the term has been applied so broadly that its meaning risks stretching; a species identified as a keystone in one location might not hold that status elsewhere, meaning their importance is context-dependent.

What is the vital lesson regarding the status of a keystone species identified by ecologists?
speciesEcologyRolekeystone species