WHAT | | But _____________________ is giving polar bears additional challenges in their searches for food. |
WHY | REASON 1 | “ ________________ is now drifting faster.” George Durner is a research zoologist with the United States Geological Survey Polar Bear Research Program. He and colleagues compared ___________from 1987-1998 with those from 1999 to 2013. |
| REASON 2 | “And what we found was that _________________ at the locations used by polar bears increased 30% in the Beaufort sea and 37% in the Chukchi sea.” That's a problem because polar bears are homebodies - they prefer to _____________________________. |
| REASON 3 | “Throughout their range, they seem to have a sense of place. And … here we have a situation where the general pattern of ice drift is westward, so to remain in your traditional range, it means you have to constantly be ______________________________ to compensate for that _______________________.” |
RESULT | | A large-scale polar bear ________________. And all that walking requires _____________. On average, a single bear eats between 31 and 33 seals per year. But the metabolic consequence of the treadmill effect means they have to eat on average ________________. The study is in the journal Global Change Biology. |
| | And not only is the _____________ - it's also ________________, giving the bears less of the platform they use to __________________. So they need more __________ but have a tougher time tracking them. All of which puts polar bears on _________________________. |