Abstract
A CO 2 evolution and a dissolved organic carbon (DOC)-die-away test were used to determine the inherent decomposability of plant litter of Ctenanthe lubbersiana grown under ambient (340 ppm) and elevated CO 2 (610 ppm). The CO 2 evolution of leaf litter in a 10 day decomposition assay was retarded by 7% (P=0.046). In the DOC-die-away test, the decomposition of a leaf litter hot water extract was retarded by 8% (P=0.039). The decomposition of the solid litter fraction was retarded by 16% (P=0.101). The decomposition rate of petioles was not affected by elevated CO 2. Despite the differences were small, the results suggest possible effects on ecosystem C cycling.
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