Bioacoustician Bernie Krause has recorded the amazingly rhythmic vascular systems of thirsty trees. He discovered that the cells in the xylem and phloem of the tree fill with air to try to maintain the osmotic pressure that's usually produced by the sucking of water up through the roots. At a certain point the cells burst. Krause adds "When they pop, they make a noise: we can't hear it, but insects can. And when insects hear multiple cells popping, they're drawn to the tree because certain ones are programmed to expect sap.To hear the trees, follow the link in today's title.
Friday, March 19, 2010
BoingBoing on the sound of thirsty trees. I'm excited to share this for many reasons (first, I've never heard of a Bioacoustician), including the fact that I'm a proud subscriber of Make Magazine. From the Boing: