Production and Carbon Isotopic Composition of Bacterial CO2 in Deep Coastal Plain Sediments of South Carolina
Production and Carbon Isotopic Composition of Bacterial CO2 in Deep Coastal Plain Sediments of South Carolina
复制标题
南卡罗来纳州沿海平原沉积物中细菌二氧化碳的产生和碳同位素组成
DOI：
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发表时间：
1990
期刊：
影响因子：
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通讯作者：
J. Morris
中科院分区：
文献类型：
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作者：
P. McMahon;Douglas F. Williams;J. Morris
测定了南卡罗来纳州沿海平原深层沉积物中细菌CO2的产生量和碳同位素组成。在实验室培养中，细菌产生CO2的速率为每天每克沉积物0至2，750纳摩尔CO2。平均而言，下倾沉积物中的CO2产量大于上倾沉积物中的CO2产量。沉积物中总有机碳含量与CO2产生量之间没有相关性。细菌CO2的碳同位素组成范围为每密耳-29.7至-18.0，部分受控于CO2来源的沉积有机物的同位素组成。从下倾沉积物的CO2同位素组成富集在13 C约50/00，平均而言，相对于从上倾沉积物的CO2。
这里给出的细菌CO2的生产和碳同位素组成的测量提供了证据，将细菌CO2与南卡罗来纳州沿海平原含水层中溶解的无机碳联系起来。
The production and carbon isotopic composition of bacterial CO2 in cores of deep Coastal Plain sediments from South Carolina were measured. Rates of bacterial CO2 production in laboratory incubations ranged from 0 to 2,750 nanomoles of CO2 per gram of sediment per day. On average, C02 production was greater in downdip sediments than in updip sediments. There was no relation between CO2 production and total organic carbon content of the sediment. The carbon isotopic composition of bacterial CO2 ranged from -29.7 to -18.0 per mil and is controlled in part by the isotopic composition of the sedimentary organic matter from which the CO2 is derived. The isotopic composition of CO2 from downdip sediments was enriched in 13C by about 50/00, on average, relative to CO2 from updip sediments.
Measurements of the production and carbon isotopic composition of bacterial CO2 given here provide evidence linking bacterial CO2 to dissolved inorganic carbon in Coastal Plain aquifers of South Carolina.