Duarte Ian Drumond, Silva Nayara Heloisa Vieira Fraga, da Costa Souza Iara, de Oliveira Larissa Bassani, Rocha Lívia Dorsch, Morozesk Mariana, Bonomo Marina Marques, de Almeida Pereira Thaís, Dias Mauro Cesar, de Oliveira Fernandes Valéria, Matsumoto Silvia Tamie
Departamento de Ciências Biológicas, Universidade Federal do Espírito Santo (UFES), Av. Fernando Ferrari, n 514, Vitoria, Espirito Santo, CEP 29075-910, Brazil.
Departamento de Ciências Fisiológicas, Universidade Federal de São Carlos (UFSCar), Av. Washington Luiz, Km 235, São Carlos, CEP 13565-905, São Paulo, Brazil.
Environ Sci Pollut Res Int. 2017 Apr;24(11):10855-10868. doi: 10.1007/s11356-017-8721-2. Epub 2017 Mar 14.
Assessment of water resources requires interdisciplinary studies that include multiple ecosystem aspects. This study evaluated the water quality of Juara Lagoon (ES, Brazil) based on physical and chemical variables, cytogenetic responses in Allium cepa and phytoplankton dynamics. Three sampling sites were defined and water samples were collected during two sampling periods. Analyses such as determination of photic zone, conductivity, and concentrations of nutrients and metals were conducted as well as cytotoxic, mutagenic, and genotoxic potentials using A. cepa test. The main attributes of phytoplankton community, such as total richness, total density, density by class, dominance, and diversity, were also evaluated. Results have revealed that Juara Lagoon has signs of artificial eutrophication at two sampling sites due to high levels of total phosphorus and ammonia nitrogen. Cytotoxic, genotoxic, and mutagenic potentials were detected as well as high concentrations of Fe and Mn. Furthermore, 165 phytoplankton taxa were recorded, with highest richness in Chlorophyceae and Cyanophyceae classes. In addition, Cyanophyceae presented as the highest density class. A. cepa test and phytoplankton community evaluation indicated that the ecological quality of Juara Lagoon is compromised.
水资源评估需要跨学科研究，其中包括多个生态系统方面。本研究基于物理和化学变量、洋葱根尖细胞遗传学反应以及浮游植物动态，对巴西圣埃斯皮里图州茹阿拉泻湖的水质进行了评估。确定了三个采样点，并在两个采样期采集了水样。进行了诸如光合层测定、电导率、营养物质和金属浓度测定等分析，以及使用洋葱根尖试验评估细胞毒性、致突变性和遗传毒性潜力。还评估了浮游植物群落的主要属性，如总丰富度、总密度、按类别划分的密度、优势度和多样性。结果表明，由于总磷和氨氮含量较高，茹阿拉泻湖的两个采样点出现了人为富营养化迹象。检测到了细胞毒性、遗传毒性和致突变性潜力以及高浓度的铁和锰。此外，记录了165种浮游植物分类群，绿藻纲和蓝藻纲的丰富度最高。此外，蓝藻纲是密度最高的类别。洋葱根尖试验和浮游植物群落评估表明，茹阿拉泻湖的生态质量受到了损害。
