JoNova

A science presenter, writer, speaker & former TV host; author of The Skeptic's Handbook (over 200,000 copies distributed & available in 15 languages).


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Corals use epigenetic tricks to adapt to warmer and “more acidic” water

After half a billion million years of climate change, I’m shocked, shocked I tell you, that life on Earth (and specifically corals) have so many ways to cope with the climate changing. After all, it’s natural (if you are trained by Greenpeace) to assume that corals can only survive in a world with one constant stable temperature just like they never had.

One more tool in the coral-reef-workshop

Corals don’t just have a tool-box, they have a Home Depot Warehouse. h/t to GWPF

We already knew corals chuck out the symbionts that don’t work so well and pick up better partners. Plus, evolution left a stack of genes lying around that were honed in a world that was warmer, and natural selection has a way of amplifying better combinations as conditions shift. Then there is the way corals can be reseeded from safe sites, far away. Now we find out that corals can use epigenetics too.

Epigenetics is that kind of spooky effect where people can inherit the exact same DNA code yet it works or doesn’t work depending on whether it was Dad’s copy, or Mum’s, or whether parents were starved, fearful or stressed. It’s weird, see […]

Life adapts — fish evolved from salt to fresh water in just fifty years

In 1964 an earthquake made some parts of the Pacific into ponds on a few islands. Fifty years later and the fish in those ponds are now freshwater fish. Apparently the genes for dealing with that sort of wild extreme change are held by some of the fish in the crowd and natural selection can work its wonders in a decade.

In terms of ocean acidification, this is as catastrophic as it gets, not only did the ocean become “more acidic” but it stopped being an ocean.

It can’t get much worse than this for a fish, and yet somehow life on Earth had the answer.

What’s the pH of those ponds — The ocean pH is 8.1, rain is 5.5. Those ponds will be somewhere in between.

And some people think a man-made “ocean acidication” that’s smaller than this and slower, will devastate the ocean.

 

Science Daily

Evolution is usually thought of as occurring over long time periods, but it also can happen quickly. Consider a tiny fish whose transformation after the 1964 Alaskan earthquake was uncovered by University of Oregon scientists and their University of Alaska collaborators.

The fish, […]