Abstract Deep-sea hydrothermal vents are unique ecosystems that may release chemically distinct dissolved organic matter to the deep ocean. Here, we describe the composition and concentrations of polar dissolved organic compounds observed in low and high temperature hydrothermal vent fluids at 9°50′N on the East Pacific Rise. The concentration of dissolved organic carbon was 46 µM in the low temperature hydrothermal fluids and 14 µM in the high temperature hydrothermal fluids. In the low temperature vent fluids, quantifiable dissolved organic compounds were dominated by water-soluble vitamins and amino acids. Derivatives of benzoic acid and the organic sulfur compound 2,3-dihydroxypropane-1-sulfonate (DHPS) were also present in low and high temperature hydrothermal fluids. The low temperature vent fluids contain organic compounds that are central to biological processes, suggesting that they are a by-product of biological activity in the subseafloor. These compounds may fuel heterotrophic and other metabolic processes at deep-sea hydrothermal vents and beyond.

中文翻译：

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9°50'N 东太平洋海隆深海热液喷口流体中溶解的有机碳化合物

摘要 深海热液喷口是一种独特的生态系统，可以向深海释放化学性质不同的溶解有机物质。在这里，我们描述了在东太平洋海隆 9°50'N 的低温和高温热液喷口流体中观察到的极性溶解有机化合物的组成和浓度。溶解有机碳的浓度在低温热液中为 46 µM，在高温热液中为 14 µM。在低温排放流体中，可量化的溶解有机化合物以水溶性维生素和氨基酸为主。苯甲酸衍生物和有机硫化合物 2,3-二羟基丙烷-1-磺酸盐 (DHPS) 也存在于低温和高温热液中。低温排放液含有对生物过程至关重要的有机化合物，这表明它们是海底生物活动的副产品。这些化合物可能会促进深海热液喷口及其他地方的异养和其他代谢过程。