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First survey of metallic distribution in zooplankton from a south Moroccan area
Oceanologia ( IF 2.9 ) Pub Date : 2023-07-11 , DOI: 10.1016/j.oceano.2023.06.009
Fatima Zohra Bouthir , Imane Afandi , Sophia Talba , Maylis Labonne , Hicham Masski , Mathieu Waeles , Raymond Lae

The Moroccan Southern Atlantic coast is mainly influenced by upwelling, Saharan dust and anthropogenic micropollutant input. These factors contribute to increasing the availability of metal elements in waters. To differentiate human impact from natural variability, knowledge of background concentrations of metals and their fluctuations in bioindicator organisms such as zooplankton is important. This work aims to determine the levels of metals elements (Zn, Mn, Pb, Cu, Cd, Cr, Co, Ni, Li, As, Sr, U, Fe and Ba) in zooplankton along the southern area of the Atlantic coast of Morocco. Zooplankton samples were collected in the summer (July 2013) and autumn (December 2013) at 27 stations from Sidi Ifni to the south of Dakhla. All stations were located on transects perpendicular to the coast. The analysis of metal elements in zooplankton was determined by ICP–MS. The results revealed that in all transects, metal concentrations were below the regulatory limits. Metal enrichments were observed in the south and decreased gradually to the north. This study can be used as baseline data for the metal contents of zooplankton in Moroccan South Atlantic coastal water. A comparison to worldwide reported data on zooplankton did not reveal any suggestions on increased metal presence in the area investigated.



中文翻译:

对摩洛哥南部地区浮游动物金属分布的首次调查

摩洛哥南大西洋海岸主要受到上升流、撒哈拉沙尘和人为微污染物输入的影响。这些因素有助于增加水中金属元素的可用性。为了区分人类影响和自然变化,了解浮游动物等生物指示生物中金属的背景浓度及其波动非常重要。本工作旨在测定大西洋沿岸南部地区浮游动物中金属元素(Zn、Mn、Pb、Cu、Cd、Cr、Co、Ni、Li、As、Sr、U、Fe 和 Ba)的含量。摩洛哥。浮游动物样本于夏季(2013 年 7 月)和秋季(2013 年 12 月)在从西迪伊夫尼到达赫拉以南的 27 个监测站采集。所有站点均位于垂直于海岸的横断面上。浮游动物中金属元素的分析采用ICP-MS 进行测定。结果显示,在所有样带中,金属浓度均低于监管限值。金属富集分布在南部,向北逐渐减少。该研究可作为摩洛哥南大西洋沿岸水域浮游动物金属含量的基线数据。与全球报告的浮游动物数据进行比较,没有发现任何关于调查区域金属存在增加的建议。

更新日期:2023-07-11
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