In the Arctic, a great change is taking place. Permafrost, which covers around 25 percent of exposed land in the Northern Hemisphere, is melting.
Arctic Warming: Keeping Ice = Saving Climate More than polar bears at risk in the great Arctic melt-out
The Arctic is an “indicator region” for the rest of the planet: small changes there can have profound ecosystem impacts elsewhere in the world…
Are Polar Bears Faring Better Given Endangered Species Protection? Population Numbers Remain Constant, But More Melting Could Spell Trouble
Dear EarthTalk: How have polar bear populations in the Arctic been faring since the U.S. put them on its endangered species list in 2008, and what efforts are underway to protect them? —Melissa Underhill, Bangor, MER Biologists estimate that as many as 25,000 polar bears […]
Dear EarthTalk: How much of a threat does climate change pose to the tundra ecosystems of the far north? — Seamus Hall, via EarthTalk.org The tundra biome is among the coldest of the planet’s ecosystems. Its harsh climate means that plant life is unable to grow more than a few centimeters above the ground. The name ‘tundra’ […]