在2013年11月的污染期间,从Szamos河(匈牙利)收集了三种具有不同饮食和栖息地偏好的小鱼:草食性,底栖nase(软骨瘤),食肉动物,底栖barbel(Barbusbarbus),和杂食性的,中上层chub(头颅)。我们的研究旨在评估这些元素在不同饮食和栖息地偏好的物种之间的积累,以及它们在生物监测工作中的潜在作用。Ca,K,Mg,Na,Cd,Cr,Cu,Fe,Mn,Pb,Sr,并分析了肌肉中的锌浓度,ill,和肝脏使用MP-AES。肌肉和ill的Cr浓度,Cu,Fe,锌随营养水平的增加而增加。同时,在与栖息地偏好有关的微量元素模式之间发现了一些差异。微量元素,包括Cd,Pb,Zn,超过了水中的阈值浓度,主要在中上层chub的肌肉和g中表现出较高的积累。此外,沉积物中微量元素的浓度升高(Cr,Cu,Mn)在底栖nase和barbel中表现出更高的积累。我们的研究结果表明,栖息地偏好是青少年生物指示能力的关键因素,倡导同时使用中上层和底栖鱼类来评估水和沉积物污染状况。
Juveniles of three cyprinids with various diets and habitat preferences were collected from the Szamos River (Hungary) during a period of pollution in November 2013: the herbivorous, benthic nase (Chondrostoma nasus), the benthivorous, benthic barbel (Barbus barbus), and the omnivorous, pelagic chub (Squalius cephalus). Our study aimed to assess the accumulation of these elements across species with varying diets and habitat preferences, as well as their potential role in biomonitoring efforts. The Ca, K, Mg, Na, Cd, Cr, Cu, Fe, Mn, Pb, Sr, and Zn concentration was analyzed in muscle, gills, and liver using MP-AES. The muscle and gill concentrations of Cr, Cu, Fe, and Zn increased with trophic level. At the same time, several differences were found among the trace element patterns related to habitat preferences. The trace elements, including Cd, Pb, and Zn, which exceeded threshold concentrations in the water, exhibited higher accumulations mainly in the muscle and gills of the pelagic chub. Furthermore, the elevated concentrations of trace elements in sediments (Cr, Cu, Mn) demonstrated higher accumulation in the benthic nase and barbel. Our findings show habitat preference as a key factor in juvenile bioindicator capability, advocating for the simultaneous use of pelagic and benthic juveniles to assess water and sediment pollution status.