Polar bears depend on sea ice as a hunting platform for seals; as Arctic sea ice declines, bears face starvation, increased conflict with humans, and population collapse.
Polar bears fasting for months on shore experience physiological stress and behavioral changes that indicate compromised welfare. Cubs born to nutritionally stressed mothers have lower survival rates. Human-bear conflict driven by bears entering settlements while searching for food creates dangerous encounters requiring lethal management. Climate action is the only meaningful long-term welfare intervention for this species.