Archives par mot-clé : Bears

Polar Bears’ Arctic Sea Ice Ecosystem Not In Danger Of Melting Away

by S.J. Crockford, October 31, 2018 in ClimateChangeDispatch


What’s a good analogy for sea ice as essential polar bear habitat? Biologist Andrew Derocher claims that the soil in a forest is appropriate because without the soil you can’t have the forest ecosystem.

However, that’s a specious comparison because the amount of soil in a forest does not change markedly with the seasons the way that Arctic sea ice does.

A much better analogy is a big pond that dries up a bit every summer. The amount of habitat available to sustain aquatic plants, amphibians and insects is reduced in the dry season but many species have special adaptations for surviving reduced water availability.