Sulfur isotopic ratios of hydrothermal vent-animals at Ogasawara Arc and Mid-Okinawa Trough-evidence for microbial origin of hydrogen sulfide at low-temperature submarine hydrothermal areas
Sulfur isotopic ratios of hydrothermal vent-animals at Ogasawara Arc and Mid-Okinawa Trough-evidence for microbial origin of hydrogen sulfide at low-temperature submarine hydrothermal areas
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小笠原岛弧和冲绳中部海槽热液喷口动物的硫同位素比——低温海底热液区硫化氢微生物起源的证据
DOI：
10.2343/geochemj.23.195
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发表时间：
1989
影响因子：
0.8
通讯作者：
S. Ohta
中科院分区：
文献类型：
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作者：
Eun;H. Sakai;J. Hashimoto;F. Yanagisawa;S. Ohta
对小笠原弧海方火山口、南延世穹丘和冲绳海槽伊平谷海岭东部火山口群落中的贻贝、蛤、管蠕虫和龙虾软组织中硫的浓度和同位素比值进行了分析。结果表明，贻贝、蛤和管蠕虫的营养来源是与化能无机硫氧化细菌的内共生，后者利用排气流体中的硫化氢作为能量来源进行有机碳合成，而龙虾则生活在化能合成食物网中。然而，这些动物的硫同位素比值为-10 ~-26‰，远低于这些地区火山岩的硫值（0 ‰ +10‰）。这意味着在所有三个地点，硫酸盐还原菌产生的硫化氢是喷口群落的重要硫源。生物群落所需的硫通量是一个或两个数量级大于正常的有机丰富的海洋沉积物中遇到的。研究表明，高热流、多孔的火山沉积物和生物群落积累的有机物质对维持火山活动海底微生物硫化氢的高生产率及其向地表的有效运输起着重要作用。
A mussel, clams, vestimentiferan tube worms and squat lobsters from vent-communities at three volcanically active sites, the Kaikata Caldera of Ogasawara Arc and the Minami-Ensei Knoll and the eastern Iheya Ridge of Okinawa Trough, were analyzed for the concentration and isotopic ratio of sulfur in their soft tissues. The results indicate that the mussel, clams and tube worms are nutritionally supported by endosymbiosis with chemolithotrophic sulfur-oxidizing bacteria which utilize hydrogen sulfide in venting fluid as energy source for organic carbon synthesis, while the squat lobsters live on the chemosynthetic food web. However, the sulfur isotopic ratios of these animals range from -10 to -26‰, much lower than the volcanic sulfur values of these areas (0∼+10‰). This implies that in all the three sites, hydrogen sulfide produced by sulfate-reducing bacteria is an important sulfur source for vent communities. The sulfur flux required for the biological communities is an order of magnitude or two greater than that encountered in normal organic-rich marine sediments. It is suggested that the high heat flow, porous volcanogenic sediments and organic materials accumulated by biological communities play important roles in maintaining high production rate of microbial hydrogen sulfide and its efficient transport to surface in volcanically active seafloor.
Sakai S 等人：“内源性内皮素 1 参与充血性心力衰竭大鼠心脏功能的维持；衰竭心脏中内皮素 1 的产生显着增加。”
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