The unified stomatal optimization (USO) series models have shown obvious biases in predicting stomatal conductance (gsw) of tropical rainforest trees, especially under low vapor pressure deficit (VPD) and irradiance conditions. However, few studies have focused on the structural problems of the USO series models themselves. The unified stomatal optimization (USO) series models have shown obvious biases in predicting stomatal conductance (gsw) of tropical rainforest trees, especially under low vapor pressure deficit (VPD) and irradiance conditions. However, few studies have focused on the structural problems of the USO series models themselves. Ecology Molecular & Computational biology Phys.org – latest science and technology news stories