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首页> 外文期刊>Geochimica et Cosmochimica Acta: Journal of the Geochemical Society and the Meteoritical Society >Osmium uptake, distribution, and Os-187/Os-188 and Re-187/Os-188 compositions in Phaeophyceae macroalgae, Fucus vesiculosus: Implications for determining the Os-187/Os-188 composition of seawater
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Osmium uptake, distribution, and Os-187/Os-188 and Re-187/Os-188 compositions in Phaeophyceae macroalgae, Fucus vesiculosus: Implications for determining the Os-187/Os-188 composition of seawater

机译：Phaeophyceae Macroalgae的锇吸收，分布和OS-187 / OS-188和RE-187 / OS-188组合物，Fucus Vesiculosus：用于确定OS-187 / OS-188海水组成的影响

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The osmium isotopic composition (Os-187/Os-188) of seawater reflects the balance of input from mantle-, continental- and anthropogenic-derived sources. This study utilizes the Phaeophyceae, Fucus vesiculosus, to analyse its Os abundance and uptake, as well as to assess if macroalgae records the Os isotope composition of the seawater in which it lives. The data demonstrates that Os is not located in one specific biological structure within macroalgae, but is found throughout the organism. Osmium uptake was measured by culturing F. vesiculosus non-fertile tips with different concentrations of Os with a known Os-187/Os-188 composition (similar to 0.16), which is significantly different from the background isotopic composition of local seawater (similar to 0.94). The Os abundance of cultured non-fertile tips show a positive correlation to the concentration of the Os doped seawater. Moreover, the Os-187/Os-188 composition of the seaweed equalled that of the culture medium, strongly confirming the possible use of macroalgae as a biological proxy for the Os isotopic composition of the seawater. (C) 2016 Elsevier Ltd. All rights reserved.
机译：海水的锇同位素组合物（OS-187 / OS-188）反映了地幔，欧洲和人为衍生来源的输入的平衡。本研究利用Pheaeophyceae，Fucus VesiCulos来分析其OS丰度和摄取，以及评估Macroalgae是否记录其生命的海水的OS同位素组成。数据表明，OS不位于大理石内的一种特定生物结构中，但在整个生物体中被发现。通过用已知的OS-187 / OS-188组合物（类似于0.16），通过用不同浓度的OS培养不同浓度的OS来测量锇吸收。与当地海水的背景同位素组成显着不同（类似于0.94）。培养的非肥沃尖端的OS丰富显示出与掺杂海水的浓度的正相关。此外，海藻的OS-187 / OS-188组成等于培养基的组成，强烈证实，Macroalgaae可能用作海水的OS同位素组合物的生物学代理。 （c）2016 Elsevier Ltd.保留所有权利。

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