Assertion: emperor penguin's population | /r/CapableOf | decline of 50%
Facets:
value: in the terre adélie region
type: LOCATION
Source sentences:
text: Population declines of 50% in the Terre Adélie region have been observed due to an increased death rate among adult birds, especially males, during an abnormally prolonged warm period in the late 1970s, which resulted in reduced sea-ice coverage.