Rotifers in the Niger River, Niger: diversity and abundance in relation to environmental parameters

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dc.contributor.authorAdamou, H Souley
dc.contributor.authorAlhou, B
dc.contributor.authorTackx, M
dc.date.accessioned2023-06-15T13:06:02Z
dc.date.available2023-06-15T13:06:02Z
dc.date.issued2021-01-26
dc.description.abstractA first study of the rotifers of the Niger River in Niger is reported here. Two surveys took place under contrasting hydrological conditions: low-water level (16 April to 8 May 2018) and high-water level (1 to 15 February 2019). Zooplankton and physico-chemical parameters were sampled at eight stations spread over 520 km from Ayorou to Gaya. In total, 32 taxa were identified, including 26 at species level. During the low-water sampling, Polyarthra sp. (31%), Brachionus caudatus (23%), Synchaeta longipes (11%), Keratella tropica (7%) and Filinia longiseta (5%) were the most abundant, whereas Brachionus quadridentatu s (26%), Lecane hastata (25%), Keratella cochlearis (9%), Keratella lunaris (5%), Hexarthra sp. (3%) were dominant during the high-water sampling. The mean abundance of rotifers ranged between 14 × 103 ind. m−3 during the high-water sampling and 244 × 103 ind. m−3 during the low-water sampling. The highest diversity was observed in the three stations located upstream from the city of Niamey. The results reflect the difference in environmental parameters between the downstream and upstream Niamey stations. RDA analyses showed that the main environmental factors explaining the distribution of rotifers were dissolved oxygen, orthophosphate and nitrate concentrations.en_US
dc.description.sponsorshipEmerging Center: Innovative Teaching/Learning of Mathematics and the Sciences for Sub-Saharan Africaen_US
dc.identifier.issn1608-5914
dc.identifier.issn1727-9364
dc.identifier.urihttp://hdl.handle.net/123456789/2005
dc.language.isoenen_US
dc.publisherAfrican Journal of Aquatic Scienceen_US
dc.relation.ispartofseriesAfrican Journal of Aquatic Science;June 2021
dc.subjectAyorouen_US
dc.subjectabundanceen_US
dc.subjectdiversityen_US
dc.subjectchemical compositionen_US
dc.subjectGayaen_US
dc.subjectzooplanktonen_US
dc.subjectF Azémaren_US
dc.subjectNigeren_US
dc.subjectUniversité Abdou Moumounien_US
dc.subjectCEA/IEA-MS4SSAen_US
dc.subjectEmerging Center: Innovative Teaching/Learning of Mathematics and the Sciences for Sub-Saharan Africaen_US
dc.titleRotifers in the Niger River, Niger: diversity and abundance in relation to environmental parametersen_US
dc.typeArticleen_US
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