Beavers in Arctic a new climate change worry amid global warming

It began decades ago, with a few hardy pioneers slogging north across the tundra. It’s said that one individual walked so far to get there that it rubbed the skin off the underside of its long, flat tail. Today, its kind have homes and colonies scattered throughout the tundra in Alaska and Canada — and their numbers are increasing. Beavers have found their way to the far north.

It’s not yet clear what these new residents mean for the Arctic ecosystem, but concerns are growing, and locals and scientists are paying close attention.

Researchers have observed that the dams beavers build accelerate changes already in play due to a warming climate. Indigenous people are worried the dams could pose a threat to the migrations of fish species they depend on.

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