Jenny McElwain
speaker
162 appearances
1 recordings
1 series
first heard Jul 2026
last heard 2 Jul
Jenny McElwain’s voice in public audio — every appearance, attributed to the second.
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recordings per month · last 12 monthsRecordings per month over the last 12 months — 1 in all, peaking in Jul 2026 with 1.
Appearances
Bill mentioned it in his palm.
So you break the flow.
And the leaves at the top of the tallest tree are actually almost living in a desert.
They're so water starved that a tree cannot get taller because they would no longer be able to photosynthesise because they need water to exchange for carbon.
So the limit of tree height is a hard line.
It's about 135 metres.
Nothing can get taller or has got taller that we know of.
So I suppose fog.
So you can get deposition of fog onto a leaf surface.
And most of the water supply is up from the roots.
But, you know, plants...
they actually can take up a certain amount of moisture through their cuticle.
But it's a tiny, tiny amount.
Yeah, so I think it's really remarkable that a tree was discovered not known to science.
And I think it was climbers or abseilers and they went down into a gorge outside Sydney, very inhospitable, you know, people don't go there, and found this grove of trees.
So for conservation purposes, botanic gardens all over the world now host trees.
wallaby pines but also genetic variants of them and this is it's called a conservation horticulture collection so it's a way of ensuring the longevity of that incredible tree into the future by kind of sending it to other places to look after kind of like plant zoos.
We actually have included it in our witness tree project so it is one of our trees that we're monitoring every year
to see how it responds to climate change and also to see how it takes up atmospheric pollution in the city environment.
I can let myself have a coffee now because it doesn't matter if I speak too quickly.
Showing 141–160 of 162 · page 8 of 9
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