RETHINKING ACCLIMATION OF GROWTH AND MAINTENANCE RESPIRATION OF TOMATO IN ELEVATED CO2: EFFECTS OF A SUDDEN CHANGE IN LIGHT AT DIFFERENT TEMPERATURES Advances in the carbon use efficiency of forest Responses and regulation mechanisms of microbial decomposers to substrate carbon, nitro-gen, and phosphorus stoichiometry Adaptation of leaf carbon use efficiency of Larix gmelinii to environmental change