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大藻类吸收微量元素:有机合物作为金属的来源,包括Fe和稀土元素

Jean-Alix Barrat¹, Thierry Heulin², Germain Bayon³

¹Univ Brest, CNRS, Ifremer, IRD, LEMAR, Institut Universitaire Européen de la Mer (IUEM), rue Dumont d'Urville, 29280, Plouzané, France; Institut Universitaire de France, Paris, France.

|November 30, 2024

概括

棕色大藻Ascophyllum nodosum从有机合物中积累微量元素,而不仅仅是海水或颗粒. 这一至关重要的过程影响营养吸收和沿海生态系统的健康.

科学领域:

海洋生物学海洋生物学
环境化学环境化学
生物地质化学生物地质化学

背景情况:

Ascophyllum nodosum是北大西洋中占主导地位的棕色大藻类.
海洋生物中的微量元素度受到各种环境因素的影响.
了解藻类中的金属生物积累对于评估沿海生态系统健康至关重要.

研究的目的:

为了确定微量元素的度在Ascophyllum nodosum.
调查微量元素在这种大藻类中的生物积累的来源和机制.
评估藻类吸收金属对生态的影响.

主要方法:

从布雷斯特湾及其贡献的河口取样Ascophyllum nodosum的样本.
对微量元素度的分析,包括稀土元素和伊特 (REY).
计算元素比率 (Y/Ho,Al/Ga,Zr/Hf) 来推断来源.

主要成果:

元素的比率表明其他来源,而不是海水或土生土长的粒子.
在REY,Ga,Al,Th,Sc,Pb,Cr和Fe丰度之间观察到强烈的相关性.
有证据表明,体吸收到藻类表面是金属生物积累的主要机制.

结论:

有机体是Ascophyllum nodosum.铁等必需营养素的重要来源.
藻类对微量金属的生物积累,包括可能有毒的如,对沿海生态系统有影响.
需要进一步的研究来阐明藻类中金属同化过程的生物学途径.

关键词:

亚斯科菲勒姆结节体 (Ascophyllum nodosum) 是一种植物.生物积累生物积累生物积累体体是一种体.稀土元素 (REE) 是一种稀土元素.海藻是一种海藻.微量元素中的微量元素.

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