Ruiz F, Abad M, Olías M, Galán E, González I, Aguilá E, Hamoumi N, Pulido I, Cantano M
Departamento de Geodinámica y Paleontología, Facultad de Ciencias Experimentales, Universidad de Huelva, Avda. Fuerzas Armadas, s/n. 21071, Huelva, Spain.
Environ Res. 2006 Oct;102(2):215-29. doi: 10.1016/j.envres.2006.03.001. Epub 2006 Apr 19.
In this paper, we present a multivariate approach (waters, sediments, microfauna) concerning the environmental state of the Nador Lagoon (NE Morocco). The normal water quality parameters (salinity, pH, nutrients) of the dominant marine flows are altered by local fecal water effluents, urban discharges, sewages derived from a water treatment station, and residues originated in a slaughterhouse. The geochemical analyses carried out in surficial sediment samples show very high concentrations of all metals studied near an old iron mine and moderate contents between Nador and its treatment station. Ostracods are good bioindicators of these environmental impacts, with the presence of a highly brackish assemblage in the quieter, more confined areas or the appearance of opportunistic species under hypoxic conditions. In addition, these microcrustaceans are absent in polluted bottom sediments or areas with high hydrodynamic gradients, whereas they decrease in both density and diversity if the subaerial exposure increases.
在本文中，我们提出了一种涉及纳多尔泻湖（摩洛哥东北部）环境状况的多变量方法（水、沉积物、小型动物）。当地粪便污水排放、城市污水排放、来自水处理站的污水以及屠宰场产生的残渣改变了主要海流的正常水质参数（盐度、pH值、营养物质）。对表层沉积物样本进行的地球化学分析表明，在一座旧铁矿附近，所有研究的金属浓度都非常高，而在纳多尔及其处理站之间含量适中。介形虫是这些环境影响的良好生物指标，在较安静、更封闭的区域存在高度咸淡水混合的组合，或者在缺氧条件下出现机会主义物种。此外，这些微型甲壳类动物在受污染的底部沉积物或水动力梯度高的区域不存在，而如果陆面暴露增加，它们的密度和多样性都会降低。
