Assertion: trumpeter swan's population | /r/CapableOf | provide critical genetic stock
Facets:
Source sentences:
text: This population provided critical genetic stock to complement the tri-state (Montana/Idaho/Wyoming) population for re-introductions in other parts of the swan's historic range.
text: This population provided critical genetic stock and with careful reintroductions by wildlife agencies, the Trumpeter Swan Society population gradually increased to over 46,000 birds by 2010.