Cyanobacteria abundance and its relationship to water quality in the Mid-Cross River floodplain, Nigeria
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| Format: | Artículo científico |
| Language: | en |
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Universidad de Costa Rica
2009
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| _version_ | 1876466213509398528 |
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| author | Okogwu Okechukwu I. |
| author_facet | Okogwu Okechukwu I. |
| contents | Cyanobacteria abundance and its relationship to water quality in the Mid-Cross River floodplain, Nigeria Okogwu Okechukwu I. Ugwumba Alex O. Biología Nigeria floodplain Cross River cyanobacteria water quality The physicochemical variables and cyanobacteria of Mid-Cross River, Nigeria, were studied in six stations between March 2005 and August 2006 to determine the relationship between water quality and cyanobacteria abundance. Canonical Correspondence Analysis (CCA) showed that biological oxygen demand (BOD), dissolved oxygen, pH, water velocity, width and depth were important environmental factors that influenced cyanobacteria abundance. Trace metals, phosphate and nitrate increased significantly from values of previous studies indicating increased eutrophication of the river but were weakly correlated with cyanobacteria abundance and could be scarcely regarded as regulating factors. A higher cyanobacteria abundance was recorded during the wet season in most of the sampled stations. The dominant cyanobacteria included Microcystis aeruginosa, Aphanizomenon flos-aquae, Oscillatoria limnetica and Anabaena spiroides. The toxins produced by these species could degrade water quality. The factors favouring cyanobacteria abundance were identified as increased pH, width and depth. Increase in cyanobacteria abundance was associated with reduction in dissolved oxygen and increase in BOD values. Rev. Biol. Trop. 57 (1-2): 33-43. Epub 2009 June 30. 2009 artículo científico 0034-7744 https://www.redalyc.org/articulo.oa?id=44918836004 en http://www.redalyc.org/revista.oa?id=449 Revista de Biología Tropical application/pdf Universidad de Costa Rica Revista de Biología Tropical (Costa Rica) Num.1-2 Vol.57 |
| format | Artículo científico |
| id | redalyc_44918836004 |
| institution | Redalyc |
| language | en |
| publishDate | 2009 |
| publisher | Universidad de Costa Rica |
| spellingShingle | Cyanobacteria abundance and its relationship to water quality in the Mid-Cross River floodplain, Nigeria Okogwu Okechukwu I. Biología Nigeria floodplain Cross River cyanobacteria water quality Cyanobacteria abundance and its relationship to water quality in the Mid-Cross River floodplain, Nigeria Okogwu Okechukwu I. Ugwumba Alex O. Biología Nigeria floodplain Cross River cyanobacteria water quality The physicochemical variables and cyanobacteria of Mid-Cross River, Nigeria, were studied in six stations between March 2005 and August 2006 to determine the relationship between water quality and cyanobacteria abundance. Canonical Correspondence Analysis (CCA) showed that biological oxygen demand (BOD), dissolved oxygen, pH, water velocity, width and depth were important environmental factors that influenced cyanobacteria abundance. Trace metals, phosphate and nitrate increased significantly from values of previous studies indicating increased eutrophication of the river but were weakly correlated with cyanobacteria abundance and could be scarcely regarded as regulating factors. A higher cyanobacteria abundance was recorded during the wet season in most of the sampled stations. The dominant cyanobacteria included Microcystis aeruginosa, Aphanizomenon flos-aquae, Oscillatoria limnetica and Anabaena spiroides. The toxins produced by these species could degrade water quality. The factors favouring cyanobacteria abundance were identified as increased pH, width and depth. Increase in cyanobacteria abundance was associated with reduction in dissolved oxygen and increase in BOD values. Rev. Biol. Trop. 57 (1-2): 33-43. Epub 2009 June 30. 2009 artículo científico 0034-7744 https://www.redalyc.org/articulo.oa?id=44918836004 en http://www.redalyc.org/revista.oa?id=449 Revista de Biología Tropical application/pdf Universidad de Costa Rica Revista de Biología Tropical (Costa Rica) Num.1-2 Vol.57 |
| title | Cyanobacteria abundance and its relationship to water quality in the Mid-Cross River floodplain, Nigeria |
| topic | Biología Nigeria floodplain Cross River cyanobacteria water quality |
| url | https://www.redalyc.org/articulo.oa?id=44918836004 |