Climate change is altering ecosystems in profound ways, especially in subalpine areas where snowmelt is becoming earlier and drought is increasingly common. There is strong evidence that subalpine and alpine ecosystems are warming at a faster rate than other ecosystems. Furthermore, plants in these environments are adapted to extreme climates and therefore are often more sensitive to environmental changes. In order to understand and monitor these impacts, I study subalpine plant populations and employ physiological, demographic and phenological tools to create a full picture of plant stress, reproductive trait shifts and growth responses.