Work

Land use type shapes carbon pathways in Tibetan alpine ecosystems: Characterization of 13C abundance in aggregates and density fractions

Year: 2024

Type: article

Abstract: • Plantation on the Tibetan Plateau reduces PAD and slows carbon transfer. • Aggregate differentiation of organic carbon exists in density fractions but not SOC. • Aggregate differentiation in δ 13 C and Δ 13 C in density fractions of only plantation. • The direction of δ 13 C enrichment from LF to PF to MF indicates carbon transfer in alpine plantation. Insight into carbon turnover in soil aggregates and density fractions is essential to reduce uncertainty in estimating carbon pools on the Tibetan Plateau. Further, how these vary with land-use type is unclear. In this study, the effect of land use type on carbon storage and fractionation based on organic carbon and its 13 C abundance was quantified at the microscale of soil aggregates and density fractions in Tibetan alpine. The sequence of soil aggregates destruction in plantation (13.1%)<shrubland (32.7%)

Source: Journal of Integrative Agriculture

DOI: 10.1016/j.jia.2024.12.035