Study of marine DOC carbon cycle based on the radioactive carbon analyses of bacterial rRNA and membrane lipids

我们制作了一个可过滤数万升的海水过滤装置，用于测量细菌rRNA和细胞膜脂分子的放射性碳（14C）比，并在北冰洋太平洋段和骏河湾深海水提取设施（深度397 m）采集了过滤样品。结果表明，北冰洋太平洋段趋化自养古菌的有机碳产率为0.0013Gt C/年，约为初级产率（0.36 Gt C/年）的0.4%。从DO14C和DI14C的测量值估计，在Suruga湾397 m深度，约有48-52%的古菌可以趋化自养。

We made up a seawater filtration device which can filter several ten thousand liter to measure radiocarbon (14C) ratio of bacterial rRNA and cell membrane lipid molecules, and the filter samples were collected at the Pacific sector of the Arctic Ocean and the Suruga bay deep seawater drawing up facilities (397 m depth). As the results, the organic carbon production rate by the chemoautotrophic archaea in the Pacific sector of the Arctic Ocean was 0.0013Gt C/year, which is about 0.4% of the primary production rate (0.36 Gt C/year). From the measured value of DO14C and DI14C, it was estimated that about 48-52% of archaea could be chemoautotrophy at 397 m depth of the Suruga Bay.