>Giant trees have no trouble pumping water to top branches
Hm, may be because they are not really "pumping" the water?
leni536•20m ago
What would you call it?
cj•14m ago
Not that it really matters, but the article also refers to it as “drawing water to the top”. That seems more representative of reality than “pumping water from the bottom”.
margalabargala•11m ago
Yeah it's the difference between creating low vs high pressure.
card_zero•5m ago
The low pressure is up there already, for free.
Or the high pressure is down here, whichever way you want to look at it.
gitaarik•12m ago
“Trees contain lots of thin, hollow vessels and they suck water upwards by creating low pressure at the top,”
So sucking / pulling?
IsTom•9m ago
So a suction pump?
card_zero•7m ago
Same principle as chimneys. But I also noticed this line:
> leaves which have adapted to withstand greater water stress before wilting.
That must be one of the "adjustments to water transport" mentioned. So I suggest that they do, in fact, have trouble pumping water to top branches.
nullorempty•26m ago
Hm, may be because they are not really "pumping" the water?
leni536•20m ago
cj•14m ago
margalabargala•11m ago
card_zero•5m ago
Or the high pressure is down here, whichever way you want to look at it.
gitaarik•12m ago
So sucking / pulling?
IsTom•9m ago
card_zero•7m ago
> leaves which have adapted to withstand greater water stress before wilting.
That must be one of the "adjustments to water transport" mentioned. So I suggest that they do, in fact, have trouble pumping water to top branches.