LPICEA people study the interactions of plants with their surrounding abiotic and biotic environments. We are aiming to understand the mechanisms of plants acclimation and adaptation and the feedbacks of plants to climate and atmosphere. To achieve this goal, we have been developing quantitative theories from optimality principles, testing our theories against various data sets (e.g. functional traits, eddy-covariance, remote sensing) from in-situ field studies and manipulation experiments, and eventually implementing the theories to vegetation and land surface models to access the large-scale impacts of plants.