Liz Harper

speaker

123 appearances 1 recordings 1 series first heard Jul 2026 last heard 30 Jul

Liz Harper’s voice in public audio — every appearance, attributed to the second.

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recordings per month · last 12 months

Recordings per month over the last 12 months — 1 in all, peaking in Jul 2026 with 1.

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In Our Time · Seashells · 30 Jul 2026 podcast

Many of them can actually, it works out in experiments, that we can actually keep up with it quite well.

They compensate.

That sounds really good.

It sounds like the snails might be winning.

in that the shell's dissolving, but they're laying down more shell.

But that's probably not quite the way of thinking about it.

It's not such a good answer because, of course, in laying down new shell, again, they're using energy and that's energy they're not using to grow or reproduce.

So although it seems on the face of it a very happy story, we have to think about that as well.

And the In Our Time podcast gets some extra time now with a few minutes of bonus material from Misha and his guests.

Scallops are good at swimming.

They're good at swimming.

a hardy aragonite mollusk it depends how fast paced that particular species lives i think so many mollusks only live for very short periods of time so one year two years and in that case there's quite a lot of energy in the tank for adapting i think the problems are the slightly longer lived

So one of the key things is that there are some mollusks that will live not only decades, but centuries.

So Hafron was dredged off Iceland.

People have always been interested in that species.

Its scientific name is Arctica Icelandica and they've always known it lives for a long while.

So it's really interesting because these are all the mollusks we're talking about really lay down growth lines, which are a bit like tree rings.

And so there's lots of environmental information we can get from tree rings or shell rings.

And so people have always been interested in this particular species.

So it was actually colleagues in Bangor who were working on this, trying to develop what's called sclerochronology, which is equivalent to dendrochronology, in the oceans.

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