Water quality of a coastal lagoon (ES, Brazil): abiotic aspects, cytogenetic damage, and phytoplankton dynamics

Abstract

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.

Composición y abundancia del zooplancton en la laguna El Morro, Isla de Margarita, Venezuela

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Marine Heatwaves, Sewage and Eutrophication Combine to Trigger Deoxygenation and Biodiversity Loss: A SW Atlantic Case Study

“…Wetlands and coastal vegetation can help to improve water quality, by reducing pathogen and nutrient concentrations and increasing oxygen availability (Zedler, 2000;Duarte et al, 2017). Restoration of these systems is a good option to improve effluent treatment in coastal areas.…”

Toxic and mutagenic activities of surface water from the Chumysh River

“…This test-object allows recording various types of chromosomal mutations induced both by mutagens directly damaging DNA and promutagenes acquiring genetic activity in the living organism in the process of metabolism (Fiskesio, 1985;Seth et al, 2008;Leme & Marin-Morales, 2009;Yildiz et al, 2009;Geras'kin et al, 2011b;Barberrio, 2013;Trushin et al, 2013;Firbas & Amon, 2014;Dutta & Ahmad, 2016;Silveira et al, 2016;Cabuga et al, 2017;Duarte et al, 2017). It has been established that the results obtained by using A. cepa are highly correlated with those carried out on mammalian cells, including human ones (Ghosh et al, 2011).…”