new video
hot off the press!  
    more about rocket
mass heaters here.
  • Post Reply Bookmark Topic Watch Topic
  • New Topic

Learning to save trees during heat and drought  RSS feed

 
Burra Maluca
Mother Tree
Posts: 9893
Location: Portugal
891
bee bike books duck forest garden greening the desert solar trees wofati
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Here's a quick snippet from the article...

Park Williams studies trees at the Los Alamos National Laboratory in New Mexico, but not the way most scientists do. "We're interested in trees that die," he says — spefiically, death by heat and drought.

Sure, lack of water kills trees, but which ones die first, how long does it take, how long can they go without water? "That's a part we don't understand very well as ecologists," says Craig Allen, an ecologist with the U.S. Geological Survey. "We don't know what it takes to kill trees."

One thing he's watching are the tiny holes in the trees' needles, called stomata. The trees absorb carbon dioxide through them, to make food. In drought, though, the stomata close up to conserve moisture. That means they can't make food. "Now that's no problem if it's just for a day or week," McDowell points out, "but you know the question is how long can they tolerate that before they run out of their stores? It's like if we didn't eat."

Full article here - Learning to save trees during heat and drought

 
Wink, wink, nudge, nudge, say no more ... richsoil.com/cards
  • Post Reply Bookmark Topic Watch Topic
  • New Topic
Boost this thread!