Cyanobacteria abundance and its relationship to water quality in the Mid-Cross River floodplain, Nigeria

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 (...

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Detalhes bibliográficos
Autores: Okechukwu I., Okogwu, Alex O., Ugwumba
Formato: artículo
Estado:Versión publicada
Fecha de publicación:2009
País:Costa Rica
Recursos:Universidad de Costa Rica
Repositorio:Portal de Revistas UCR
Idioma:inglés
OAI Identifier:oai:portal.ucr.ac.cr:article/11288
Acesso em linha:https://revistas.ucr.ac.cr/index.php/rbt/article/view/11288
Access Level:acceso abierto
Palavra-chave:cross river
floodplain
cyanobacteria
water quality
nigeria
río cross
llanura de inundación
cianobacterias
calidad del agua
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spelling Cyanobacteria abundance and its relationship to water quality in the Mid-Cross River floodplain, NigeriaCyanobacteria abundance and its relationship to water quality in the Mid-Cross River floodplain, NigeriaOkechukwu I., OkogwuAlex O., Ugwumbacross riverfloodplaincyanobacteriawater qualitynigeriarío crossllanura de inundacióncianobacteriascalidad del aguanigeriaThe 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 aerugi- nosa, 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 valuesLas variables físico-químicas y la abundancia de cianobacterias del río nigeriano Mid-Cross fueron estudiadas en seis estaciones entre marzo del 2005 y agosto del 2006. El Análisis de Correspondencia Canónica (CCA) demostró que la demanda biológica de oxígeno (DBO), oxígeno disuelto, pH, velocidad de agua, anchura y profundidad son factores ambientales importantes que influyen en la abundancia de cianobacterias. Los mayores valores de trazas de metales, fosfatos y nitratos, en comparación con estudios previos, indican mayor eutrofización, pero tienen poca correlación con la abundancia de las cianobacterias. La mayor abundancia de cianobacterias se registró durante el periodo más húmedo de la estación seca en la mayoría de las estaciones de muestreo. Las cianobacterias dominantes incluyen Microcystis aeruginosa, Aphanizomenon flosAquae, Oscillatoria limnetica y Anabaena spiroides. Las toxinas producidas por estas especies podrían degradar la calidad del agua. Los factores que favorecen la abundancia de cianobacterias fueron identificados como el aumento de pH, ancho y profundidad. El aumento de la abundancia se asoció con una reducción de oxígeno disuelto y un aumento de los valores de DBOUniversidad de Costa Rica2009-06-01info:eu-repo/semantics/publishedVersionartículo originalhttp://purl.org/coar/resource_type/c_2df8fbb1info:eu-repo/semantics/articleapplication/pdfhttps://revistas.ucr.ac.cr/index.php/rbt/article/view/1128810.15517/rbt.v57i1-2.11288Revista de Biología Tropical; Vol. 57 No. 1-2 (2009): Volume 57 – Regular number 1-2 – March-June 2009; 33−43Revista de Biología Tropical; Vol. 57 Núm. 1-2 (2009): Volumen 57 – Número regular 1-2 – Marzo-Junio 2009; 33−43Revista Biología Tropical; Vol. 57 N.º 1-2 (2009): Volumen 57 – Número regular 1-2 – Marzo-Junio 2009; 33−432215-20750034-774410.15517/rbt.v57i1-2reponame:Portal de Revistas UCRinstname:Universidad de Costa Ricainstacron:UCRenghttps://revistas.ucr.ac.cr/index.php/rbt/article/view/11288/10644Derechos de autor 2009 Revista de Biología Tropicalhttp://creativecommons.org/licenses/by/4.0acceso abiertohttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccess2022-06-06T18:01:21Zoai:portal.ucr.ac.cr:article/11288Portal de revistashttps://revistas.ucr.ac.cr/Universidadhttp://www.ucr.ac.crhttps://revistas.ucr.ac.cr/index.php/index/oaijorge.polanco@ucr.ac.crCosta RicaNo aplicaNo aplicaNo aplicaopendoar:2025-08-13T10:15:28.418Portal de Revistas UCR - Universidad de Costa Ricafalse
dc.title.none.fl_str_mv Cyanobacteria abundance and its relationship to water quality in the Mid-Cross River floodplain, Nigeria
Cyanobacteria abundance and its relationship to water quality in the Mid-Cross River floodplain, Nigeria
title Cyanobacteria abundance and its relationship to water quality in the Mid-Cross River floodplain, Nigeria
spellingShingle Cyanobacteria abundance and its relationship to water quality in the Mid-Cross River floodplain, Nigeria
Okechukwu I., Okogwu
cross river
floodplain
cyanobacteria
water quality
nigeria
río cross
llanura de inundación
cianobacterias
calidad del agua
nigeria
title_short Cyanobacteria abundance and its relationship to water quality in the Mid-Cross River floodplain, Nigeria
title_full Cyanobacteria abundance and its relationship to water quality in the Mid-Cross River floodplain, Nigeria
title_fullStr Cyanobacteria abundance and its relationship to water quality in the Mid-Cross River floodplain, Nigeria
title_full_unstemmed Cyanobacteria abundance and its relationship to water quality in the Mid-Cross River floodplain, Nigeria
title_sort Cyanobacteria abundance and its relationship to water quality in the Mid-Cross River floodplain, Nigeria
dc.creator.none.fl_str_mv Okechukwu I., Okogwu
Alex O., Ugwumba
author Okechukwu I., Okogwu
author_facet Okechukwu I., Okogwu
Alex O., Ugwumba
author_role author
author2 Alex O., Ugwumba
author2_role author
dc.subject.none.fl_str_mv cross river
floodplain
cyanobacteria
water quality
nigeria
río cross
llanura de inundación
cianobacterias
calidad del agua
nigeria
topic cross river
floodplain
cyanobacteria
water quality
nigeria
río cross
llanura de inundación
cianobacterias
calidad del agua
nigeria
description 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 aerugi- nosa, 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
publishDate 2009
dc.date.none.fl_str_mv 2009-06-01
dc.type.none.fl_str_mv info:eu-repo/semantics/publishedVersion
artículo original
http://purl.org/coar/resource_type/c_2df8fbb1
info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://revistas.ucr.ac.cr/index.php/rbt/article/view/11288
10.15517/rbt.v57i1-2.11288
url https://revistas.ucr.ac.cr/index.php/rbt/article/view/11288
identifier_str_mv 10.15517/rbt.v57i1-2.11288
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv https://revistas.ucr.ac.cr/index.php/rbt/article/view/11288/10644
dc.rights.none.fl_str_mv Derechos de autor 2009 Revista de Biología Tropical
http://creativecommons.org/licenses/by/4.0
acceso abierto
http://purl.org/coar/access_right/c_abf2
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Derechos de autor 2009 Revista de Biología Tropical
http://creativecommons.org/licenses/by/4.0
acceso abierto
http://purl.org/coar/access_right/c_abf2
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Universidad de Costa Rica
publisher.none.fl_str_mv Universidad de Costa Rica
dc.source.none.fl_str_mv Revista de Biología Tropical; Vol. 57 No. 1-2 (2009): Volume 57 – Regular number 1-2 – March-June 2009; 33−43
Revista de Biología Tropical; Vol. 57 Núm. 1-2 (2009): Volumen 57 – Número regular 1-2 – Marzo-Junio 2009; 33−43
Revista Biología Tropical; Vol. 57 N.º 1-2 (2009): Volumen 57 – Número regular 1-2 – Marzo-Junio 2009; 33−43
2215-2075
0034-7744
10.15517/rbt.v57i1-2
reponame:Portal de Revistas UCR
instname:Universidad de Costa Rica
instacron:UCR
instname_str Universidad de Costa Rica
instacron_str UCR
institution UCR
reponame_str Portal de Revistas UCR
collection Portal de Revistas UCR
repository.name.fl_str_mv Portal de Revistas UCR - Universidad de Costa Rica
repository.mail.fl_str_mv jorge.polanco@ucr.ac.cr
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score 15,811543

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