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keystone species

noun

ˈkiː.stəʊn ˈspiː.ʃiːz

Meaning

A species on which other species in an ecosystem largely depend, such that if it were removed the ecosystem would change drastically.

Wolves are a keystone species that regulate prey populations.

essential species, foundational species, ecosystem regulator

non-essential species, minor species, dispensable

An official license or approval, especially to publish a book.

the concluding passage of a piece of music or a literary work

the inner surface of the hand; also a tropical tree with large leaves

Agreement or harmony among parts; a pleasing combination of sounds in music or words.

Complex, comprehensive structures for organizing and managing information that have multiple aspects...

the projecting edge of a hat; the edge or lip of something