Daylength helps temperate deciduous trees to leaf-out at the optimal time - Fu, Yongshuo H.. (Beijing Normal University. College of Water Sciences) ; Zhang, Xuan (Beijing Normal University. College of Water Sciences) ; Piao, Shilong (Sino-French Institute for Earth System Science) ; Hao, Fanghua (Beijing Normal University. College of Water Sciences) ; Geng, Xiaojun (Beijing Normal University. College of Water Sciences) ; Vitasse, Yann (Swiss Federal Institute for Forest. Snow and Landscape Research) ; Zohner, Constantin (ETH Zurich. Institute of Integrative Biology) ; Peñuelas, Josep (Centre de Recerca Ecològica i d'Aplicacions Forestals) ; Janssens, Ivan (Universiteit Antwerpen. Departement Biologie)