The content you've requested is available without charge only to active Sigma Xi members and American Scientist subscribers.
If you are an active member or an individual subscriber, please log in now in order to access this article.
If you are not a member or individual subscriber, you can:
In the high Andes of Bolivia sits an unexpected sight: patches of
otherworldly trees and bushes adapted to live in the harsh
conditions found more than 4,000 meters above sea level. Polylepis
forests are unique ecosystems harboring about 20 different plant
species of what the locals call queñua, as well as numerous
insect and bird specialists living only in these forests. Once
thought to be patchy by nature, Polylepis forests are now recognized
to be highly endangered. Exploited since Incan times, the forests
now occupy only about 1 percent of their original area in the
eastern Bolivian Andes and about 3 percent in Peru. The authors
describe the value of the Polylepis ecosystem and the challenges
conservationists face in preserving what remains.
Connect With Us:
An early peek at each new issue, with descriptions of feature articles, columns, and more. Every other issue contains links to everything in the latest issue's table of contents.News of book reviews published in American Scientist and around the web, as well as other noteworthy happenings in the world of science books.
To sign up for automatic emails of the American Scientist Update and Scientists' Nightstand issues, create an online profile, then sign up in the My AmSci area.
JSTOR, the online academic archive, contains complete back issues of American Scientist from 1913 (known then as the Sigma Xi Quarterly) through 2005.
The table of contents for each issue is freely available to all users; those with institutional access can read each complete issue.
View the full collection here.
Receive notification when new content is posted from the entire website, or choose from the customized feeds available.