Microbial and chemical characterization of underwater fresh water springs in the Dead Sea.
Microbial and chemical characterization of underwater fresh water springs in the Dead Sea.
复制标题
死海水下淡水泉的微生物和化学特征。
DOI：
10.1371/journal.pone.0038319
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发表时间：
2012
期刊：
影响因子：
3.7
通讯作者：
de Beer D
中科院分区：
文献类型：
--
作者：
Ionescu D;Siebert C;Polerecky L;Munwes YY;Lott C;Häusler S;Bižić-Ionescu M;Quast C;Peplies J;Glöckner FO;Ramette A;Rödiger T;Dittmar T;Oren A;Geyer S;Stärk HJ;Sauter M;Licha T;Laronne JB;de Beer D
由于其极端的盐度和高镁浓度，死海的特点是细胞密度非常低，其中大多数是古生物。我们在死海中发现了几个水下淡水到微咸水泉，其中含有密集的微生物群落。我们提供了这些社区的第一个表征，讨论他们可能的起源，水化学环境，能源和假定的地球化学途径，他们调解。焦磷酸测序的16 S rRNA基因和社区指纹的方法表明，春天的社会起源于死海沉积物，而不是从含水层。此外，这表明在湖泊的海岸线孔隙水中存在着密集的藻类群落。细菌硫酸盐还原菌、硝化菌、铁氧化菌和铁还原菌的序列也得到了鉴定。对白色和绿色生物膜的分析表明，通过化能营养和光营养的硫化物氧化是非常重要的。高光谱分析表明，丰富的绿色硫细菌和蓝藻之间的紧密联系的绿色生物膜。总之，我们的研究结果表明，死海海底拥有多种微生物群落，其中一部分是从其他高盐环境中所不知道的。对水的化学分析显示，沿着这条路径沿着有微生物活动的证据，并表明泉水为死海的微生物群落提供了氮、磷和有机物。水下泉水是死海新发现的水源。在评估湖泊表面沃茨稀释事件可能产生的影响时，需要考虑到它们输入的微生物和营养物，例如由于打算建立红海-死海输水管道而将在未来发生的稀释事件。
Due to its extreme salinity and high Mg concentration the Dead Sea is characterized by a very low density of cells most of which are Archaea. We discovered several underwater fresh to brackish water springs in the Dead Sea harboring dense microbial communities. We provide the first characterization of these communities, discuss their possible origin, hydrochemical environment, energetic resources and the putative biogeochemical pathways they are mediating. Pyrosequencing of the 16S rRNA gene and community fingerprinting methods showed that the spring community originates from the Dead Sea sediments and not from the aquifer. Furthermore, it suggested that there is a dense Archaeal community in the shoreline pore water of the lake. Sequences of bacterial sulfate reducers, nitrifiers iron oxidizers and iron reducers were identified as well. Analysis of white and green biofilms suggested that sulfide oxidation through chemolitotrophy and phototrophy is highly significant. Hyperspectral analysis showed a tight association between abundant green sulfur bacteria and cyanobacteria in the green biofilms. Together, our findings show that the Dead Sea floor harbors diverse microbial communities, part of which is not known from other hypersaline environments. Analysis of the water’s chemistry shows evidence of microbial activity along the path and suggests that the springs supply nitrogen, phosphorus and organic matter to the microbial communities in the Dead Sea. The underwater springs are a newly recognized water source for the Dead Sea. Their input of microorganisms and nutrients needs to be considered in the assessment of possible impact of dilution events of the lake surface waters, such as those that will occur in the future due to the intended establishment of the Red Sea−Dead Sea water conduit.
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DOI：
10.1007/bf00322470
发表时间：
1994-10-01
期刊：
FRESENIUS JOURNAL OF ANALYTICAL CHEMISTRY
影响因子：
--
作者：
DULSKI, P
通讯作者：
DULSKI, P
影响因子：
2.8
作者：
Caccavo, F;Coates, JD;McInerney, MJ
通讯作者：
McInerney, MJ
影响因子：
4.4
作者：
Engel, AS;Lee, N;Wagner, M
通讯作者：
Wagner, M
影响因子：
3.3
作者：
Closson, Damien;Karaki, Najib Abou
通讯作者：
Karaki, Najib Abou
影响因子：
5.3
作者：
ANATI, DA;STILLER, M;GAT, JR
通讯作者：
GAT, JR