"ice is not a polar bear nutrient"

Sea Ice - End of Game Analysis « Climate Audit

The polar bear's "usual food source" is seals. If there is no ice, the seals must hang out near the shoreline because seals are mammals and need sleep and while they can sleep at sea, they are at risk from orcas and other predators if they do so. When there is a lot of ice, they surface and rest. If there is no ice, they go to shore. This nonsense about polar bears somehow needing ice to survive is nuts. If there is a lot of ice, the seals will be dispersed and the polar bears forage across the ice in search of them. When there is no ice, the seals come to the bears. The last interglacial was warmer than this one has been and there was less ice than there is now. In fact, there might have been no polar bears at all in the last interglacial and the current "polar bear" is simply a brown bear that has been selected due to coat color. The whiter the coat, the more seals they catch, the longer they live, the more cubs they produce in a lifetime, and the trait is selected in over time. That trait might get selected out when there is no ice and the bears need to be "browner" or patchy brown/white to better catch seals on shore.

Again, ice is not a polar bear nutrient. If anything the lack of ice will result in a decrease in seal populations by keeping them closer to shore where more are eaten by bears.