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首页> 外文期刊>Journal of Environmental Management >Profiling metal contamination from ultramafic sediments to biota along the Albanian shoreline of Lake Ohrid (Albania/Macedonia)
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Profiling metal contamination from ultramafic sediments to biota along the Albanian shoreline of Lake Ohrid (Albania/Macedonia)

机译：沿奥赫里德湖阿尔巴尼亚海岸线（阿尔巴尼亚/马其顿）沿奥伯克斯沉积物对Biota的剖析金属污染

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Ultramafic sediments exhibit high levels of geogenically-derived and potentially toxic metals, with Ni, Cr and Co often exceeding benchmark values. As yet, a holistic understanding of the bioavailability, mobility, potential ecotoxicity and trophic transfer of trace elements in both benthic and pelagic food chains in aquatic ultramafic environments (UME) is lacking. We investigated potential environmental health issues due to metal contamination by jointly implementing chemical, ecological and toxicological tools, along the Albanian shoreline of Lake Ohrid. It is an aquatic system of worldwide importance, representative of temperate UME with a legacy of Ni and Cr contamination from mining activities. Levels of Ni, Cr, Cd, Cu, Co, Fe, Mn and Zn were determined in waters, sediments and native biota. The potential environmental mobility of sediment-bound elements was further assessed using CaCl_2, EDTA and acetic acid extractions. Whole-sediment ecotoxicity tests were also carried out using ostracods and chironomids, according to standardized procedures. Despite Ni and Cr concentrations above the sediment quality guidelines for probable effect levels, we did not observe ecotoxic effects in laboratory tests. However, these elements were bioavailable to native organisms under field conditions, especially to benthic primary producers in direct contact with sediments (up to 139 mg Cr kg~(-1) and 785 mg Ni kg~(-1)). Although biomagnification was not observed, further investigations of metal translocation, metabolism and elemental trophic transfer along benthic food webs appears to be a general research priority in the management of temperate UME. The present study shows that proper management of temperate UME requires not only the integration of data from different lines of evidence, but also laboratory vs. field approaches to understand the subtler, long-term effects of increased elemental body burdens in native organisms.
机译：UltraMAFIC沉积物表现出高水平的地质衍生和潜在的毒性金属，Ni，Cr和Co经常超过基准值。目前，缺乏对生物利用度，移动性，潜在的微量元素的微量元素和底层食物链中的微量元素（UME）中的微量元素的全面了解。我们通过共同实施化学，生态和毒理学工具，沿着奥赫里德湖的阿尔巴尼亚海岸线来调查潜在的环境健康问题。它是一个全球性的水生制性，代表温带梅花，遗产来自矿业活动的遗产和Cr污染。在水，沉积物和天然生物脂中测定Ni，Cr，Cd，Cu，Co，Fe，Mn和Zn的水平。使用CaCl_2，EDTA和乙酸提取进一步评估沉积物结合元素的潜在环境迁移率。根据标准化程序，还使用ostracods和依湿式体进行全沉淀的生态毒性试验。尽管NI和CR浓度高于沉积物质量准则，但我们在实验室测试中没有观察到生态毒性效果。然而，这些元素在现场条件下对本地生物进行生物可利用，特别是对底栖初级生产者直接接触沉积物（高达139mg Cr kg〜（-1）和785mg ni kg〜（-1））。虽然未观察到生物磁化，但沿着底栖食品网的金属易位，代谢和元素营养转移的进一步调查似乎是气候卷的管理中的一般研究优先考虑。本研究表明，适当的温带uME管理不仅需要从不同的证据中的数据集成，而且还需要实验室与现场方法来了解副领域，而是增加元素体内均衡在本地生物中的长期影响。

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