Arnaud Assogba

Institut National des Recherches Agricoles du Bénin

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i-10 index

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Yves Morel

Hospices Civils de Lyon

Olaègbè Victor Okpeitcha

Université d'Abomey-Calavi

Zacharie Sohou

Institut National des Recherches Agricoles du Bénin

Alexis Chaigneau

Université d'Abomey-Calavi

Thomas Duhaut

Centre National de la Recherche Scientifique

Thomas Stieglitz

Centre National de la Recherche Scientifique

Christophe Peugeot

Laboratoire HydroSciences Montpellier

Fabien Rétif

Observatoire de Recherche Montpelliérain de l'Environnement OREME

Ezinvi Baloïtcha

Université d'Abomey-Calavi

Jules Honfo

Université d'Abomey-Calavi

Cooperative Institutions

Université d'Abomey-Calavi

Centre National de la Recherche Scientifique

Institut de Recherche pour le Développement

Laboratoire d’Études en Géophysique et Océanographie Spatiales

Université de Toulouse

Université Toulouse III - Paul Sabatier

Institut National des Recherches Agricoles du Bénin

UNESCO

Ifremer

École Polytechnique

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Seasonal and interannual variations of suspended particulate matter in a West-African lagoon (Nokoué lagoon, Benin): Impact of rivers and wind

Estuarine Coastal and Shelf Science (2024)

Indrig Laeticia Ntangyong Alexis Chaigneau Yves Morel Arnaud Assogba Olaègbè Victor Okpeitcha

Discharge

10.1016/j.ecss.2024.108821

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Citations (2)

Tidal Impacts on Zooplankton Dynamics in a Major Ocean-Lagoon Channel: Insights from a 25-Hour Intensive Survey in the Cotonou Channel, Benin

Journal of Marine Science and Engineering (2024)

Hervé Hotèkpo Akodogbo Fridolin Ubald Dossou-Sognon François Talomonwo Ouinsou Thalasse Tchémangnihodé Avocegan Junior Patric Kouglo

This study investigates the effects of tidal cycles on the zooplankton community within the Cotonou Channel, an important waterway connecting the large Nokoué Lagoon to the Atlantic Ocean in Benin. From the determination of zooplankton composition from 25-hour samples collected in July 2020, alpha diversity indices and abundance were assessed, while relationships between biotic and abiotic parameters were analyzed through Pearson correlation, analysis of variance, and principal component analysis. A total of 66 zooplankton taxa were identified, with rotifers exhibiting the highest species richness (35 taxa), while copepods dominated in abundance (71%). Zooplankton abundance varied significantly, ranging from 2 to 95 ind L−1 depending on the tidal phase. A negative correlation was found between species richness (r = −0.51, p < 0.01) and increasing salinity (3–37), indicating that higher salinity reduced diversity (r = 0.06, p > 0.05). Resilient species like Synchaeta bicornis persisted despite salinity changes. The tidal cycle structurally altered the zooplankton community, with abundance and diversity peaking at different phases, notably higher at high tide (15 ind L−1.) These initial findings underscore the complex interactions between tidal dynamics and estuarine biodiversity, suggesting the need for further research across different tidal and seasonal conditions to inform effective management and conservation efforts.

10.3390/jmse12091519

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Citations (0)

Terrestrial or oceanic forcing? Water level variations in coastal lagoons constrained by river inflow and ocean tides

Advances in Water Resources (2022)

Yves Morel Alexis Chaigneau Olaègbè Victor Okpeitcha Thomas Stieglitz Arnaud Assogba

Inflow

Forcing (mathematics)

Discharge

10.1016/j.advwatres.2022.104309

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Citations (13)