SOLAR LAKE (SINAI) .5. SULFUR CYCLE OF BENTHIC CYANOBACTERIAL MATS
SOLAR LAKE (SINAI) .5. SULFUR CYCLE OF BENTHIC CYANOBACTERIAL MATS
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DOI：
10.4319/lo.1977.22.4.0657
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发表时间：
1977-01-01
影响因子：
4.5
通讯作者：
COHEN, Y
中科院分区：
文献类型：
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作者：
JORGENSEN, BB;COHEN, Y
太阳湖（西奈）的沿岸沉积物由厚达1米的蓝藻席组成。在这些草席中，S化合物、有机C、碳酸盐以及硫酸盐还原和其他厌氧异养细菌的垂直分布。用放射性示踪技术测量的硫酸盐原位还原速率从表面的5400 nmol SO42- cm-3 day-1下降到垫底的< 1，下降了10,000倍。估算了无机S化合物和有机物的周转率。由底栖藻类和细菌产生的溶解有机化合物大量流入蓝藻席，这可以从厌氧呼吸速率推断出来。给出了沉积S - C旋回的定量流程图。
The littoral sediments of Solar Lake (Sinai) consist of cyanobacterial mats up to 1 m thick. The vertical distributions in these mats of S compounds, organic C, carbonate and of sulfate-reducing and other anaerobic, heterotrophic bacteria are presented. The in situ rate of sulfate reduction, measured with a radiotracer technique, decreased 10,000-fold from 5400 nmol SO42- cm-3 day-1 at the surface to < 1 at the bottom of the mats. Turnover rates of inorganic S compounds and of organic matter were estimated. A high influx down into the cyanobacterial mats of dissolved organic compounds produced by the epibenthic algae and bacteria could be deduced from the anaerobic respiration rates. A quantitative flow diagram of the sedimentary S and C cycle is presented.