Strong responses of soil greenhouse gas fluxes to litter manipulation in a boreal larch forest, Northeastern China - Duan, Beixing (Centre de Recerca Ecològica i d'Aplicacions Forestals) ; Xiao, Ruihan (Northeast Forestry University) ; Cai, Tijiu (Northeast Forestry University) ; Man, Xiuling (Northeast Forestry University) ; Ge, Zhaoxin (Northeast Forestry University) ; Gao, Mengdi (Northeast Forestry University) ; Mencuccini, Maurizio (Centre de Recerca Ecològica i d'Aplicacions Forestals)