The pattern suggests that the region's extreme ... after trees die because drought and heat have stressed the trees. During drought, aspen close off microscopic openings in their leaves, a ...

A similar distribution pattern exists for Populus tremula ... The ability of aspen to produce whole stands of "trees" vegetatively provides yet another key element in explaining the species ...

In a surprising discovery within Kids Camp at Kaniksu Land Trust’s Pine Street Woods, students from Washington Elementary ...