Comment by ljf
9 hours ago
I think the issue is for the animals that actually need a colder climate and/or rely on ice/snow cover - a warming world won't give them a new space to move to (yet).
9 hours ago
I think the issue is for the animals that actually need a colder climate and/or rely on ice/snow cover - a warming world won't give them a new space to move to (yet).
One anecdote/example that has stuck with me is a heard of caribou in the Canadian north. In winter, they typically dig through the snow to find plants to eat. One year, with rising temperatures, a large area was left with a thick layer of ice on top of the snow. Precipitation was falling as rain (instead of snow) due to warmer temperatures, then freezing overnight creating this thick layer of ice. The caribou couldn't punch through the ice and ended up starving to death resulting in a mass die off.
The ones that survived will have had more efficient metabolisms, or harder hooves that could break through the ice to get to the food, or could have learned a technique to cope. Hopefully their next generation will retain those traits or that culture to adapt.
Bigger animals have low numbers, larger ranges, less genetic variability, longer reproductive cycles, evolve much slower, and tend to go extinct much more reliably.
Or they’ll just go extinct. Not all species will adapt.
Yeah, animal species definitely successfully evolve over the course of a dozen years /s
1 reply →
Lots of fruit trees need an accumulated number of cold hours every year. I've seen warnings about some plantings already having issues with not producing enough fruit.
We may lose the sea ice and continental glaciers, but we'll probably still retain some ice with the intersection of extreme altitudes and extreme latitudes, at least for our lifetimes. A place like Denali is a lifeboat.
> A place like Denali is a lifeboat.
I think this is more accurate than you may have intended. It will be a single lifeboat, when the Titanic is sinking. Quite useful if you can get on it, and would guarantee survival, but for an awful small number relative to how many would like to be onboard.
Yep but the Titanic is the whole planet and there isn't a place to get yo safety on such a lifeboat.