Microbial Processes Forming Daily Lamination in an Aragonite Travertine, Nagano-yu Hot Spring, Southwest Japan
Microbial Processes Forming Daily Lamination in an Aragonite Travertine, Nagano-yu Hot Spring, Southwest Japan
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DOI：
10.1080/01490451003743275
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发表时间：
2011-01-01
影响因子：
2.3
通讯作者：
Kano, Akihiro
中科院分区：
文献类型：
--
作者：
Okumura, Tomoyo;Takashima, Chizuru;Kano, Akihiro
日本西南部长野汤温泉的文石石灰华呈现出清晰的亚毫米级层状，类似于古代的小叠层石。连续三十三个小时的观察表明，层状结构每天都在形成，除光强度外，其他理化性质没有变化。系统发育型分析和荧光原位杂交表明 Hydrogenophaga sp。占主导地位并集中在含有丰富细胞外聚合物的昼夜层中。 Hydrogenophaga sp 的生长。在白天被激活，可能是由于蓝藻光合作用产生细胞外聚合物。以 Hydrogenophaga 为主的生物膜的白天形成以及对文石沉淀的同时抑制作用解释了每天观察到的层状现象。
An aragonite travertine at Nagano-yu hot spring, SW Japan, exhibits clear sub-millimeter-order lamination that resembles ancient ministromatolites. Thirty-three hours of continuous observation showed that the lamination is formed daily with no changes in physicochemical properties except light intensity. Phylotype analysis and fluorescence in situ hybridization indicate that Hydrogenophaga sp. is dominant and concentrated in diurnal layers containing abundant extracellular polymeric substances. Growth of Hydrogenophaga sp. is activated in the daytime, likely due to extracellular polymeric substance production by cyanobacterial photosynthesis. Daytime development of Hydrogenophaga-dominant biofilms, and the concurrent inhibiting effect on aragonite precipitation, explains the daily lamination observed.