Diverse stoichiometry of dissolved trace metals in the Indian Ocean

Diverse stoichiometry of dissolved trace metals in the Indian Ocean
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DOI:
10.1038/srep01745
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发表时间:
2013-04-29
期刊:
影响因子:
4.6
通讯作者:
Sohrin, Yoshiki
Sohrin, Yoshiki
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Huong Thi Dieu Vu;Sohrin, Yoshiki

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海水中的痕量金属是生物所必需的,也是海洋中各种过程的重要示踪剂。然而,我们对痕量金属的全球分布和循环没有很好的了解,特别是在印度洋。在这里,我们首次报道了印度洋中溶解(D)Al、Mn、Fe、Co、Ni、Cu、Zn、Cd和Pb的同时、全深度和盆地尺度剖面分布。我们的数据揭示了DFE对浮游植物生产的广泛共同限制和与氧化还原相关的过程的发生。在印度洋和太平洋的深水之间,DM/P比率的化学计量符合系数5,而在印度洋内的水团之间,它显示出高达300倍的变异性。这表明,一个一致的机制控制着深海的化学计量比,与浮游植物的需求相比,深水中的锰、铁和钴显著枯竭。
Trace metals in seawater are essential to organisms and important as tracers of various processes in the ocean. However, we do not have a good understanding of the global distribution and cycling of trace metals, especially in the Indian Ocean. Here we report the first simultaneous, full-depth, and basin-scale section-distribution of dissolved (D) Al, Mn, Fe, Co, Ni, Cu, Zn, Cd, and Pb in the Indian Ocean. Our data reveal widespread co-limitation for phytoplankton production by DFe and occurrence of redox-related processes. The stoichiometry of the DM/phosphorus ratio agrees within a factor of 5 between deep waters in the Indian and Pacific, whereas it shows variability up to a factor of 300 among water masses within the Indian Ocean. This indicates that a consistent mechanism controls the stoichiometry in the deep waters, which are significantly depleted in Mn, Fe, and Co compared to requirements for phytoplankton.
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