PHOTOTROPHIC SULFUR BACTERIA AND SULFATE-REDUCING BACTERIA CAUSING RED WATERS IN A SHALLOW BRACKISH COASTAL LAGOON (PREVOST LAGOON, FRANCE)
PHOTOTROPHIC SULFUR BACTERIA AND SULFATE-REDUCING BACTERIA CAUSING RED WATERS IN A SHALLOW BRACKISH COASTAL LAGOON (PREVOST LAGOON, FRANCE)
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DOI：
10.1111/j.1574-6968.1986.tb01958.x
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发表时间：
1986-07-01
影响因子：
4.2
通讯作者：
CAUMETTE, P
中科院分区：
文献类型：
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作者：
CAUMETTE, P
在普雷沃斯特(北纬43°30‘，东经3°54“；法国地中海沿岸)的浅水湖，温暖的夏季周期性地出现红色水域，这是从早春开始的一系列生态事件的结果，藻类(石笋)大量繁殖。1977年夏天，对一种红色的水进行了分析；在初夏，水变得缺氧，富含硫化物，这些硫化物源于沉积物前10厘米的硫酸盐还原。光营养细菌和硫酸盐还原细菌(SRB)的数量在春夏季节均有所增加，优势种群中的属没有变化：光营养细菌中的硫杆菌占80%，硫酸盐还原细菌中的硫杆菌和硫酸盐弧菌占80%。在红水时期，它们也占主导地位。还鉴定了少数染色单体属和硫囊藻属。在红水期，这些细菌生长非常活跃，清除了SRB产生的所有硫化物，并在整个水柱中积累。因此，硫酸盐水平增加到5 mmol.cntdot。L-1高于根据盐度计算的理论硫酸盐水平，表明光养细菌对硫化物的氧化活性。营养不良危机后，水体恢复了氧化条件，部分光养细菌的生物量被密集分布在底泥表面的底栖动物吞食。
In the shallow lagoon of Prevost (43.degree.30''N, 3.degree.54''E; French Mediterranean coast), red waters occurring periodically during warm summers are a consequence of a succession of ecological events beginning in the early spring with a bloom of algae (Ulva lactuca). In summer 1977, a red water was analyzed; in the early summer, the water turned anoxic and became rich in sulfide which originated from sulfate reduction in the first 10 cm of the sediment. Numbers of both phototrophic and sulfate-reducing bacteria (SRB) increased during spring and summer, and the genera in the prevailing populations did not change: Thiocapsa (80%) among the phototrophic bacteria and Desulfovibrio and Desulfobacter among the SRB. They were also dominant during the period of red waters. A few Chromatium and Thiocystis species were also identified. During red water periods, these bacteria grew very actively, removing all the sulfide produced by SRB, and accumulated in the whole water column. Consequently, the sulfate level increased to 5 mmol .cntdot. l-1 higher than the theoretical sulfate level calculated from salinity, showing the active oxidation of sulfide by phototrophic bacteria. After the dystrophic crisis, oxic conditions were reestablished and the phototrophic bacterial biomass was partly grazed by zoobenthos organisms which densely populated the sediment surface.