New scientific findings are often fun and interesting, but how some "journalists" write about such things is annoying to the nth degree. Xylem consists of a series of cellulosic tubes and during water stress, the transpirational pull upon the water columns, a force generated by water loss from leaves, can generate air embolisms. In a manner of speaking, xylem gets the bends. A research group has found that formation of these air bubbles makes sounds. Now that's not all that unexpected or surprising. Ever listen to the bubbles of carbon dioxide rising from your carbonated beverage? That hiss you hear is the sound of all those bursting bubbles. If you had sufficiently fine listening devices, and slowed down the sounds recorded, you could probably listen to each individual bursting bubble. Or how about the sound of air bubbles being made in a drinking straw when your sucking has lowered the level of the liquid to nearly the bottom? Now the finding that air bubbles in the tiny xylem "straws" in a tree make a noise when forming is somewhat interesting but mostly because people don't think about trees making any noise. Now here's where the newsy report goes seriously arwy. It's not a "drought distress call" any more than your crispy rice cereal is calling for help to keep from drowning in the milk. Scheesh! This puts this report into a category of bad journalism by making a physical thing that can be explained in a non-technical way into something vaguely anthropomorphic. Was embolism too technical? Or xylem? Where do the find these writers? Oh, yeah, far away from science.
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