[PCA] Fwd: Trees Make Sounds When They're Running Out Of Water, Lab Experiments Suggest

[De Angelis, Patricia]

This is so cool and so sad, too...

*Trees Make Sounds When They're Running Out Of Water, Lab Experiments
Suggest*
http://www.huffingtonpost.com/2013/05/02/trees-make-sounds-drought_n_3200491.html

*By Elizabeth Howell, OurAmazingPlanet
Contributor:<http://www.livescience.com/29177-tree-drought-sounds.html>
*

Like a person gasping for air when it's in short supply, living trees make
noises when they are running out of water, and a team of French scientists
is a step closer to pinpointing the noises.

Lab experiments at Grenoble University in France have isolated
ultrasonic<http://www.livescience.com/18355-ultrasonic-tarsier-call.html>pops,
which are 100 times faster than what a human can hear, in slivers of
dead pine wood bathed in a hydrogel to simulate the conditions of a living
tree.

Researchers exposed the gel to an artificially dry
environment<http://www.ouramazingplanet.com/1597-10-driest-places-on-earth.html>and
listened for the noises that occurred as air bubbles built up, similar
to what occurs to trees during
droughts<http://www.livescience.com/21469-drought-definition.html>
.
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