Fasting season length sets temporal limits for global polar bear persistence

Nature Climate Change, Published online: 20 July 2020; doi:10.1038/s41558-020-0818-9

Polar bear numbers are expected to decline as the sea ice they rely on to catch their prey declines with global warming. Projections show when fasts caused by declining sea ice are likely to lead to rapid recruitment and survival declines across the polar bear circumpolar range.