Assertion: pika's population | /r/HasProperty | experienced decline
Facets:
value: since 1995
type: TEMPORAL
value: in the yukon area
type: LOCATION
Source sentences:
text: No population trend is known; however, studies have shown that the population of collared pikas has experienced a decline since 1995 in the Yukon area, and is proposed to have a higher probability of extinction within that specific area in 10 to 15 years.