Assertion: arctic fox | /r/CapableOf | keep red fox numbers
Facets:
value: historically
type: TEMPORAL
Source sentences:
text: An alternate explanation of the red fox's gains involves the gray wolf: Historically, it has kept red fox numbers down, but as the wolf has been hunted to near extinction in much of its former range, the red fox population has grown larger, and it has taken over the niche of top predator.[citation needed]