Assertion: pika | /r/HasProperty | a keystone species
Facets:
value: for biodiversity in this region
type: TRANSITIVE-OBJECT
Source sentences:
text: Recent analyses, however, have shown that such control efforts may be misguided, as the pika is a keystone species for biodiversity in this region.
text: These are some of the factors that led Dr. Smith to claim that the pika is a keystone species.