Analysis of water quality, bioindicators, contaminants and their cytogenetic impacts in a Cerrado reservoir
The fragmentation of Brazilian rivers due to the construction of hydroelectric dams has altered aquatic ecosystems, resulting in the accumulation of residues in sediments. This study evaluated the cytotoxicity and genotoxicity of water and sediments from the Cana Brava reservoir, located in the Toca...
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Associação Brasileira de Engenharia Sanitária e Ambiental
2025-01-01
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| Series: | Revista Brasileira de Ciências Ambientais |
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| Online Access: | https://www.rbciamb.com.br/Publicacoes_RBCIAMB/article/view/2115 |
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| author | Sarah Haysa Mota Benicio João Antônio Xavier Manso Marcelino Benvindo-Souza Daniela de Melo e Silva Aparecido Divino da Cruz Klebber Teodomiro Martins Formiga |
| author_facet | Sarah Haysa Mota Benicio João Antônio Xavier Manso Marcelino Benvindo-Souza Daniela de Melo e Silva Aparecido Divino da Cruz Klebber Teodomiro Martins Formiga |
| author_sort | Sarah Haysa Mota Benicio |
| collection | DOAJ |
| description | The fragmentation of Brazilian rivers due to the construction of hydroelectric dams has altered aquatic ecosystems, resulting in the accumulation of residues in sediments. This study evaluated the cytotoxicity and genotoxicity of water and sediments from the Cana Brava reservoir, located in the Tocantins-Araguaia basin in the Cerrado biome, using the Allium cepa test. Sampling points were situated in the Cana Brava reservoir near two tributaries, the Bonito River and the Varjão Stream, areas susceptible to contaminant input due to proximity to urban areas. Physicochemical parameters, metals through atomic absorption spectrometry, toxicity, and analyses of bioindicators such as microalgae and macrophytes were assessed. Near the Varjão Stream, algal richness was higher, with the presence of Chara rusbyana, which indicates good water quality. Near the Bonito River, pollution-indicating microalgae such as Euglena sp., Nitzschia sp., and Oscillatoria sp. were identified, along with a prevalence of Salvinia auriculata, favored by nutrient availability. Cytogenetic tests revealed that sediments, especially from the site near the Varjão Stream, caused chromosomal abnormalities and cytogenotoxic effects, with an increase observed after 72 hours. Principal components analysis showed that phosphorus and potassium in the sediment from the site near the Bonito River correlated with cellular alterations at 48 hours, while sediments near the Varjão Stream resulted in a higher frequency of cytogenetic alterations at 72 hours. These results highlight local impacts on water quality and biological diversity, recommending continuous monitoring to mitigate the adverse effects of pollution in the Cana Brava reservoir. |
| format | Article |
| id | doaj-art-6b2e0271e91148d994c8c29d2faa8b65 |
| institution | OA Journals |
| issn | 1808-4524 2176-9478 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Associação Brasileira de Engenharia Sanitária e Ambiental |
| record_format | Article |
| series | Revista Brasileira de Ciências Ambientais |
| spelling | doaj-art-6b2e0271e91148d994c8c29d2faa8b652025-08-20T02:25:13ZengAssociação Brasileira de Engenharia Sanitária e AmbientalRevista Brasileira de Ciências Ambientais1808-45242176-94782025-01-0160e2115e211510.5327/Z2176-947821151762Analysis of water quality, bioindicators, contaminants and their cytogenetic impacts in a Cerrado reservoirSarah Haysa Mota Benicio0https://orcid.org/0000-0002-6647-7958João Antônio Xavier Manso1https://orcid.org/0000-0003-4724-0354Marcelino Benvindo-Souza2https://orcid.org/0000-0001-9008-6087Daniela de Melo e Silva3https://orcid.org/0000-0003-0362-0988Aparecido Divino da Cruz4https://orcid.org/0000-0003-0753-3814Klebber Teodomiro Martins Formiga5https://orcid.org/0000-0003-1094-362XUniversidade Federal de Goiás (UFG) - BrazilPontifícia Universidade Católica de Goiás (PUC-GO) - BrazilUniversidade Estadual de Goiás (UEG) - BrazilUniversidade Federal de Goiás (UFG) - BrazilPontifícia Universidade Católica de Goiás (PUC-GO) - BrazilUniversidade Federal de Goiás (UFG) - BrazilThe fragmentation of Brazilian rivers due to the construction of hydroelectric dams has altered aquatic ecosystems, resulting in the accumulation of residues in sediments. This study evaluated the cytotoxicity and genotoxicity of water and sediments from the Cana Brava reservoir, located in the Tocantins-Araguaia basin in the Cerrado biome, using the Allium cepa test. Sampling points were situated in the Cana Brava reservoir near two tributaries, the Bonito River and the Varjão Stream, areas susceptible to contaminant input due to proximity to urban areas. Physicochemical parameters, metals through atomic absorption spectrometry, toxicity, and analyses of bioindicators such as microalgae and macrophytes were assessed. Near the Varjão Stream, algal richness was higher, with the presence of Chara rusbyana, which indicates good water quality. Near the Bonito River, pollution-indicating microalgae such as Euglena sp., Nitzschia sp., and Oscillatoria sp. were identified, along with a prevalence of Salvinia auriculata, favored by nutrient availability. Cytogenetic tests revealed that sediments, especially from the site near the Varjão Stream, caused chromosomal abnormalities and cytogenotoxic effects, with an increase observed after 72 hours. Principal components analysis showed that phosphorus and potassium in the sediment from the site near the Bonito River correlated with cellular alterations at 48 hours, while sediments near the Varjão Stream resulted in a higher frequency of cytogenetic alterations at 72 hours. These results highlight local impacts on water quality and biological diversity, recommending continuous monitoring to mitigate the adverse effects of pollution in the Cana Brava reservoir.https://www.rbciamb.com.br/Publicacoes_RBCIAMB/article/view/2115allium cepa; water; sediment; aquatic macrophytes; reservoir. |
| spellingShingle | Sarah Haysa Mota Benicio João Antônio Xavier Manso Marcelino Benvindo-Souza Daniela de Melo e Silva Aparecido Divino da Cruz Klebber Teodomiro Martins Formiga Analysis of water quality, bioindicators, contaminants and their cytogenetic impacts in a Cerrado reservoir Revista Brasileira de Ciências Ambientais allium cepa; water; sediment; aquatic macrophytes; reservoir. |
| title | Analysis of water quality, bioindicators, contaminants and their cytogenetic impacts in a Cerrado reservoir |
| title_full | Analysis of water quality, bioindicators, contaminants and their cytogenetic impacts in a Cerrado reservoir |
| title_fullStr | Analysis of water quality, bioindicators, contaminants and their cytogenetic impacts in a Cerrado reservoir |
| title_full_unstemmed | Analysis of water quality, bioindicators, contaminants and their cytogenetic impacts in a Cerrado reservoir |
| title_short | Analysis of water quality, bioindicators, contaminants and their cytogenetic impacts in a Cerrado reservoir |
| title_sort | analysis of water quality bioindicators contaminants and their cytogenetic impacts in a cerrado reservoir |
| topic | allium cepa; water; sediment; aquatic macrophytes; reservoir. |
| url | https://www.rbciamb.com.br/Publicacoes_RBCIAMB/article/view/2115 |
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