Is fish bone subfossil a good archive of heavy metal pollution on Nandao Island, South China Sea?

Is fish bone subfossil a good archive of heavy metal pollution on Nandao Island, South China Sea?
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鱼骨亚化石是南海南岛重金属污染的良好档案吗?

DOI:
10.1016/j.marpolbul.2019.04.036
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发表时间:
2019-06
影响因子:
5.8
通讯作者:
Xiaodong Liu
Xiaodong Liu
中科院分区:
环境科学与生态学3区
文献类型:
--
作者:
Xueying Wang;Jing Sun;Libin Wu;Liqiang Xu;Yongli Zhou;Zixuan Rao;Jing Jin;Xiaodong Liu

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为了检验历史鱼骨是否能记录重金属污染的程度,我们分析了从南中国海南岛的鸟源沉积物剖面中提取的700年前的鱼骨遗骸。散装沉积物和亚化石鱼骨进行了元素和矿物组成,以及稳定的碳和氮同位素分析。结果表明,1850年前的鱼骨经历了显著的成岩作用,不能用于重建重金属污染的历史记录。沉积物剖面上的鱼骨成岩作用主要是由于鸟粪的侵蚀作用。相比之下,1850年后的鱼骨保存完好,可以提供过去160年历史污染负荷的有用信息。自1850年以来,南海南岛鱼骨亚化石中记录了相对较高浓度的人为来源的重金属,尤其是锌。
To examine whether historical fish bones can record the magnitude of heavy metal pollution, we analyzed up to 700 years old fish bone remains extracted from an ornithogenic sediment profile on Nandao Island, South China Sea. Bulk sediments and subfossil fish bones were analyzed for elemental and mineralogical composition, as well as stable carbon and nitrogen isotopes. The results showed that pre-1850 CE fish bones experienced significant diagenesis, and could not be used to reconstruct historical record of heavy metal pollution. Fish bone diagenesis was mainly attributed to the erosion from guano in sediment profile. In contrast, the fish bones from in post-1850 CE time were well preserved and could provide useful information on historical pollution loads over the past 160 years. Since 1850 CE, relatively high concentrations of heavy metals from anthropogenic sources, especially Zn, were recorded in fish bone subfossils on Nandao Island, South China Sea.
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