Environmental assessment of three Southern Brazilian rivers using an integrated biomarker response index in Hypostomus ancistroides applied to GIS.

IF 7.7 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Environmental Research Pub Date : 2025-10-06 DOI:10.1016/j.envres.2025.123028

Fernando Garrido de Oliveira, Alessandra Svonka Palmeiro, Patricia Elena Manuitt Brito, Welton Gydeonny Motta, Marta Margarete Cestari, Helena Cristina da Silva de Assis, Lilian Dena Dos Santos

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引用次数: 0

Abstract

This study evaluated the effects of contaminants, particularly metals and pesticides, in three rivers in Southern Brazil - São Camilo, Santa Fé, and Pioneiro - using the catfish Hypostomus ancistroides as a bioindicator. Biomarkers of oxidative stress, neurotoxicity, and genotoxicity were employed and integrated into an Integrated Biomarker Response (IBR) index, spatial analysis conducted using Geographic Information Systems (GIS). Sampling occurred during two seasons, winter (2022) and summer (2023), with sediments and fish collected from three sites per river. Detected concentrations of metals, including Cu, Zn, K, and Mn, were below Brazilian regulatory thresholds. Biomarker responses revealed significant biological effects associated with oxidative stress, particularly at intermediate and downstream sites. These included acetylcholinesterase inhibition, increased activity of superoxide dismutase (SOD) and catalase (CAT), elevated levels of metallothionein's (MET) and lipid peroxidation (LPO), indicating neurotoxicity and oxidative damage. Site SF2 (Santa Fé River) exhibited the greatest impact, likely due to the urban and industrial influences. Nuclear morphological alterations revealed localized genotoxic effects. Despite the low contaminant levels, the results highlight notable sublethal effects on fish health and ecological integrity. The integration of biomarkers proved effective in identifying critical areas and informing environmental management strategies.

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应用GIS对巴西南部三条河流的综合生物标志物响应指数进行环境评价。

这项研究评估了污染物的影响，特别是金属和农药，在巴西南部的三条河流- o Camilo, Santa f和pioneer - iro -使用鲶鱼作为生物指标。氧化应激、神经毒性和遗传毒性的生物标志物被纳入综合生物标志物反应（IBR）指数，利用地理信息系统（GIS）进行空间分析。采样在冬季（2022年）和夏季（2023年）两个季节进行，从每条河流的三个地点收集沉积物和鱼类。检测到的金属浓度，包括铜、锌、钾和锰，都低于巴西的监管阈值。生物标志物反应揭示了氧化应激相关的显著生物学效应，特别是在中间和下游位点。其中包括乙酰胆碱酯酶抑制，超氧化物歧化酶（SOD）和过氧化氢酶（CAT）活性升高，金属硫蛋白（MET）和脂质过氧化（LPO）水平升高，表明神经毒性和氧化损伤。SF2 （Santa f河）受到的影响最大，可能是由于城市和工业的影响。核形态改变显示局部遗传毒性作用。尽管污染物水平较低，但结果突出了对鱼类健康和生态完整性的显著亚致死效应。事实证明，生物标志物的整合在识别关键区域和为环境管理策略提供信息方面是有效的。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Environmental Research 环境科学-公共卫生、环境卫生与职业卫生

CiteScore

12.60

自引率

8.40%

发文量

2480

审稿时长

4.7 months

期刊介绍： The Environmental Research journal presents a broad range of interdisciplinary research, focused on addressing worldwide environmental concerns and featuring innovative findings. Our publication strives to explore relevant anthropogenic issues across various environmental sectors, showcasing practical applications in real-life settings.