Updated feedbacks (2007 version) Phenology Growing Leaf Ps season Respiration Plant growth Plant soil C Plant community.,→NUE Microbial community C/C species Fungi/bacteria Quality of Plant N bulk litter uptake 4 Litter Available N Decomposition Luo,2007.Ann.Rev.Ecol.Evol.System Updated feedbacks (2007 version) Plant community C 4/C3 species Leaf Ps Phenology Growing season Plant growth Microbial community Fungi/bacteria Plant N uptake Plant & soil C Available N Quality of bulk litter Respiration NUE Litter Decomposition Luo, 2007. Ann. Rev. Ecol. Evol. System