[PCA] NEWS: Yellowstone a petri dish for climate change

[Olivia Kwong]

http://www.latimes.com/news/nation-and-world/la-na-yellowstone6-2009dec06,0,6081255.story

Yellowstone a petri dish for climate change
The national park's virtually intact ecosystem, where the hand of man 
remains light, is a natural place for scientists to study the biological 
effects of global warming.
By Julie Cart
December 6, 2009

Reporting from Yellowstone National Park -  Roy Renkin is a biologist by 
training but a detective by inclination, and something about the willows 
was nagging him.

See the link above for the full article text.