Publications Scientifiques

[ Article ] Seasonal variations and distribution of diatom flora of Lake Ahémé (Benin, West Africa)

Date de soumission: 22-02-2021
Année de Publication: 2020
Entité/Laboratoire Laboratoire d'Ecologie et de Management des Ecosystèmes Aquatiques (LEMEA)
Document type : Article
Discipline(s) : Sciences Environnement &Ecologie
Titre Seasonal variations and distribution of diatom flora of Lake Ahémé (Benin, West Africa)
Auteurs ABOU YOUSSOUF [3], Olodo Isabella Yasmine I. B. [1], Cocquyt Christine [2], KOKOU Kouami [4],
Journal: Botany Letters
Catégorie Journal: Internationale
Impact factor: 1.048
Volume Journal: 167
DOI: https://doi.org/10.1080/23818107.2019.1657495
Resume Lake Ahémé (part of Ramsar 1017) is one of the most productive brackish water ecosystems and is the second-largest lake in Benin in terms of area, after Lake Nokoué. However, this lake has received little attention for hydrobiological studies, although it is subject to heavy pollution. Therefore, the present study aims to contribute to the monitoring of Lake Ahémé, by assessing the diatom flora. For this purpose, eight sites were surveyed during the dry and wet seasons between September 2014 and 2016. Physico-chemical parameters were measured and diatoms were collected using a phytoplankton net. Margalef, Simpson, Shannon-Weaver, Pielou Equitability and Berger-Parker diversity indices showed significant diversity in Lake Ahémé. The n-MDS and ANOSIM analyses of the diatom communities showed heterogeneity according to seasons and sites. SIMPER analysis revealed that Aulacoseira granulata, Entomoneis paludosa, Nitzschia sigma, Nitzschia linearis, Tryblionella debilis, Thalassiosira lacustris, Cyclotella sp., Iconella capronii, Iconella robusta and Cerataulina bicornis contributed to the changes in diatom community structure. Redundancy analysis showed that temperature, pH, conductivity, total dissolved solids and dissolved oxygen were driving factors in the distribution of diatoms species in Lake Ahémé. The influence of the Atlantic Ocean on Lake Ahémé is noted through the presence of high salinity tolerant species such as Entomoneis paludosa, Nitzschia closterium, Nitzschia sigma and Coscinodiscus wailesii. Further taxonomic research is needed to better understand diatom ecology and species biogeographical distribution.
Mots clés Beninbiogeography diatomsdiversityheterogeneityLake Ahémé
Pages 160 - 173
Fichier

Publications par entité

  • Centre de Formation et de Recherche en matière de Population (CEFORP) (0)
  • Centre Interfacultaire de Formation et de Recherche en Environnement pour le Développement Durable (CIFRED) (0)
  • Chaire Internationale en Physique Mathématique et Applications (CIPMA-Chaire UNESCO) (0)
  • Ecole Doctorale Pluridisciplinaire <<Espaces, Culture et Développement>> (0)
  • Ecole Nationale d'Administration et de Magistrature (ENAM) (0)
  • Ecole Nationle d'Economie Appliquée et de Management (0)
  • Ecole Normale Supérieure (0)
  • Ecole Polytechnique d'Abomey-Calavi (EPAC) (0)
  • Faculté de droit et de Science Politique (FADESP) (0)
  • Faculté des Lettres et Sciences Humaines (FLASH) (0)
  • Faculté des Lettres, Langues, Arts et Communications (FLLAC) (0)
  • Faculté des Sciences Agronomiques (0)
  • Faculté des Sciences de la Santé (FSS) (0)
  • Faculté des Sciences Economiques et de Gestion (FASEG) (0)
  • Faculté des Sciences et Techniques (FAST) (0)
  • Faculté des Sciences Humaines et Sociales (FASHS) (0)
  • Institut de Formation et de Recherche en Informatique (IFRI) (0)
  • Institut de Géographie de l'Aménagement du territoire et de l'Environnement (IGATE) (0)
  • Institut de Mathématiques et de Sciences Physiques (IMSP) (0)
  • Institut National de l'Eau (INE) (0)
  • INSTITUT NATIONAL DE LA JEUNESSE DE L’EDUCATION PHYSIQUE ET SPORT(INJEPS) (0)
  • Institut National des Métiers d'Art d'Archéologie et de la Culture (INMAAC) (0)
  • Institut National Médico Sanitaire ( INMeS) (0)
  • Institut Régional de Santé Publique (IRSP) (0)

Publications par sexe

  • Femme( 1402 )
  • Homme (