Climate change is posing a major threat to polar bear survival. The polar bear, whose native range lies largely within the Arctic Circle, depends on sea ice for nearly all of its life cycle functions. And rising temperatures are causing that sea ice to disappear.
The Arctic used to be pretty much a pristine wilderness populated only by fairly small numbers of indigenous residents living environmentally benign lifestyles. The disruptive elements of modern civilization were not much of a factor. Because of the changing climate, this is no longer true.
Most of us are aware that shrinking ice cover is bad news for Arctic wildlife, with animals like polar bears and seals losing important breeding, nursery, and feeding grounds. What has received less attention is the impact ice loss has on life in Arctic waters.[Read more…] about Arctic Ecosystems
Earth’s current biodiversity is the highest in the history of life – ever. It’s the product of three and a half billion years of evolution. But a new study warns that a tipping point is on the horizon.