Assessing past changes in bioavailable zinc from a terrestrial (Zn/Si)opal record
Assessing past changes in bioavailable zinc from a terrestrial (Zn/Si)opal record
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根据陆地 (Zn/Si) 蛋白石记录评估生物可利用锌的过去变化
DOI：
10.1016/j.chemgeo.2008.10.037
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发表时间：
2009
期刊：
影响因子：
3.9
通讯作者：
K. Wilkinson
中科院分区：
文献类型：
--
作者：
T. Jaccard;D. Arizteguí;K. Wilkinson
通过分析硅藻化石中的锌含量，评估了日内瓦湖表层水中生物有效锌浓度的历史变化。测量的蛋白石中锌硅比((锌/硅)蛋白石)与代表日内瓦湖的淡水硅藻养殖数据和野外数据一致。重建的变化表明，浮游植物对锌的吸收在1960-1980年期间发生了增加，这是由于湖泊中锌的负荷增加所致。尽管如此，观测到的浓度足够低，预计不会对中上层群落产生不利影响。这里提供的数据表明，(锌/硅)蛋白石记录可能成为评估淡水系统过去生物有效锌浓度变化的有价值的工具。
Historical changes in bioavailable Zn concentrations of the surface waters of Lake Geneva were assessed by analyzing the zinc content of fossil diatoms. The measured ratios of Zn to Si in the opal ((Zn/Si)opal) were consistent with both data obtained for cultured freshwater diatoms that were representative of lake Geneva and with field data. Reconstructed variations suggested that increased Zn uptake by phytoplankton occurred in the period from 1960–1980 resulting from an increased loading of Zn to the lake. Nonetheless, observed concentrations were sufficiently low that no adverse effects were expected on the pelagic community. The data presented here suggest that (Zn/Si)opalrecords may become a valuable tool to assess past changes in bioavailable Zn concentrations in freshwater systems.