Atmospheric Pb-210 as a tracer for soil organic carbon transport in a coniferous forest

作者：Teramage Mengistu T^*; Onda Yuichi; Wakiyama Yoshifumi; Kato Hiroaki; Kanda Takashi; Tamura Kenji

来源：Environmental Science: Processes and Impacts , 2015, 17(1): 110-119.

DOI：10.1039/c4em00402g

Core soils and falling litter samples were collected in a Japanese cypress forest (Chamaecyparis obtusa) to determine the litter-fed Pb-210(ex) and organic carbon transfer from the forest canopy to soil and their subsequent distribution. Of the canopy residing Pb-210(ex) pool, litterfall annually transports 53% to the forest floor while it adds 117 g m(-2) per year of organic carbon to the forest soil, implying that litterfall dynamics can influence the distribution of Pb-210(ex) and soil organic carbon (SOC). Pb-210(ex) and SOC showed identical profile shapes and strong correlation in spatial as well as along the soil depth, indicating that both are affected by a similar process. Given the ubiquitous natural source of Pb-210(ex), it is plausible to infer that radiolead can be a possible tracer to study the SOC redistribution at regional and global scales.

• 出版日期2015