Zooplankton associations and environmental factors in Ogunpa and Ona rivers, Nigeria
Zooplankton abundance, composition and environmental parameters were monitored in two tropical rivers over a twenty month period. The data was subjected to cluster, factor and correlation analysis to determine the grouping pattern of zooplankton and their relationship to environmental parameters. En...
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| Format: | Article |
| Language: | English |
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Universidad de Costa Rica
2003-06-01
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| Series: | Revista de Biología Tropical |
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| Online Access: | http://www.scielo.sa.cr/scielo.php?script=sci_arttext&pid=S0034-77442003000200011 |
| _version_ | 1827161785022545920 |
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| author | Gbemisola A. Akin-Oriola |
| author_facet | Gbemisola A. Akin-Oriola |
| author_sort | Gbemisola A. Akin-Oriola |
| collection | DOAJ |
| description | Zooplankton abundance, composition and environmental parameters were monitored in two tropical rivers over a twenty month period. The data was subjected to cluster, factor and correlation analysis to determine the grouping pattern of zooplankton and their relationship to environmental parameters. Environmental factors in Ogunpa and Ona rivers -included buffering capacity, trace metal ions, pH-temperature/ transparency- were primarily influenced by rainfall. The dominance of the Rotifera in both rivers was attributed to their short developmental rate and fish predation on larger zooplankton. Two groups of associations were identified in each river - a commonly occurring species group exhibiting strong homogenous correlation with environmental factors and a predominant group exhibiting weak correlation with environmental factors and whose abundance / composition may be defined by biotic factors.<br>La abundancia, y composición del zooplancton, y parámetros ambientales fueron monitoreados en dos ríos tropicales durante un período de doce meses. Los datos fueron sometidos a análisis de agrupaciones, de factores y de correlación para determinar los patrones de agrupamiento del zooplancton y sus relaciones con parámetros ambientales. Los factores ambientales en los ríos Ogunpa y Ona, incluidos la capacidad tampón, iones metálicos traza, pH-temperatura/ transparencia, fueron influenciados principalmente por la lluvia. La dominancia de los Rotíferos en ambos ríos fue atribuida a su corta tasa de desarrollo y a la depredación del zooplancton grande por peces. Dos grupos de asociaciones fueron identificadas en cada río - la presencia de un grupo común de especies que exhiben una fuerte y homogénea correlación con factores ambientales y un grupo predominante que exhibe una débil correlación con factores ambientales y cuya abundancia / composición que podría estar definida por factores bióticos. |
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| format | Article |
| id | doaj.art-5a4159bbbbab4774b264e45fe22d10e5 |
| institution | Directory Open Access Journal |
| issn | 0034-7744 2215-2075 |
| language | English |
| last_indexed | 2025-03-21T00:34:26Z |
| publishDate | 2003-06-01 |
| publisher | Universidad de Costa Rica |
| record_format | Article |
| series | Revista de Biología Tropical |
| spelling | doaj.art-5a4159bbbbab4774b264e45fe22d10e52024-08-03T06:43:47ZengUniversidad de Costa RicaRevista de Biología Tropical0034-77442215-20752003-06-01512391398Zooplankton associations and environmental factors in Ogunpa and Ona rivers, NigeriaGbemisola A. Akin-OriolaZooplankton abundance, composition and environmental parameters were monitored in two tropical rivers over a twenty month period. The data was subjected to cluster, factor and correlation analysis to determine the grouping pattern of zooplankton and their relationship to environmental parameters. Environmental factors in Ogunpa and Ona rivers -included buffering capacity, trace metal ions, pH-temperature/ transparency- were primarily influenced by rainfall. The dominance of the Rotifera in both rivers was attributed to their short developmental rate and fish predation on larger zooplankton. Two groups of associations were identified in each river - a commonly occurring species group exhibiting strong homogenous correlation with environmental factors and a predominant group exhibiting weak correlation with environmental factors and whose abundance / composition may be defined by biotic factors.<br>La abundancia, y composición del zooplancton, y parámetros ambientales fueron monitoreados en dos ríos tropicales durante un período de doce meses. Los datos fueron sometidos a análisis de agrupaciones, de factores y de correlación para determinar los patrones de agrupamiento del zooplancton y sus relaciones con parámetros ambientales. Los factores ambientales en los ríos Ogunpa y Ona, incluidos la capacidad tampón, iones metálicos traza, pH-temperatura/ transparencia, fueron influenciados principalmente por la lluvia. La dominancia de los Rotíferos en ambos ríos fue atribuida a su corta tasa de desarrollo y a la depredación del zooplancton grande por peces. Dos grupos de asociaciones fueron identificadas en cada río - la presencia de un grupo común de especies que exhiben una fuerte y homogénea correlación con factores ambientales y un grupo predominante que exhibe una débil correlación con factores ambientales y cuya abundancia / composición que podría estar definida por factores bióticos.http://www.scielo.sa.cr/scielo.php?script=sci_arttext&pid=S0034-77442003000200011Zooplanktonenvironmental parametersriversNigeriaclusterfactor and correlation analysis |
| spellingShingle | Gbemisola A. Akin-Oriola Zooplankton associations and environmental factors in Ogunpa and Ona rivers, Nigeria Revista de Biología Tropical Zooplankton environmental parameters rivers Nigeria cluster factor and correlation analysis |
| title | Zooplankton associations and environmental factors in Ogunpa and Ona rivers, Nigeria |
| title_full | Zooplankton associations and environmental factors in Ogunpa and Ona rivers, Nigeria |
| title_fullStr | Zooplankton associations and environmental factors in Ogunpa and Ona rivers, Nigeria |
| title_full_unstemmed | Zooplankton associations and environmental factors in Ogunpa and Ona rivers, Nigeria |
| title_short | Zooplankton associations and environmental factors in Ogunpa and Ona rivers, Nigeria |
| title_sort | zooplankton associations and environmental factors in ogunpa and ona rivers nigeria |
| topic | Zooplankton environmental parameters rivers Nigeria cluster factor and correlation analysis |
| url | http://www.scielo.sa.cr/scielo.php?script=sci_arttext&pid=S0034-77442003000200011 |
| work_keys_str_mv | AT gbemisolaaakinoriola zooplanktonassociationsandenvironmentalfactorsinogunpaandonariversnigeria |