Concepts

Differential expression of genotypes across environmental conditions, indicating genetic variation in phenotypic plasticity

Differences in chromosome copy number among individuals, specifically diploid (two copies) versus triploid (three copies) chromosome sets

Rapid, synchronous mortality of aspen across large areas characterized by gradual sudden aspen decline associated with recent drought and temperature stress

The biogeographic transition zone between subalpine forest and alpine tundra, representing the elevational limit of individual trees with an upright growth form