Shepherds, often of Mexican, Basque, Greek or Irish descent, have long spent summer months high in Wyoming ... many left their marks on the bark of aspen trees as they traveled through, and ...

As summer begins to end and overnight ... 2008). The ability of aspen to produce whole stands of "trees" vegetatively provides yet another key element in explaining the species’ ability to ...

"Aspen trees—like their relatives ... "Those trees had cranked up their defenses," Lindroth says. "By mid-summer, they produced an entirely new set of leaves that had, on average, an eight ...