Composition and Structure of Herbaceous Flora and Vegetation of the Lower Delta of Oueme in Southern Benin

Jacques Boco Adjakpa, Hounnankpon Yedomonhan, Pierre Onodjè Agbani and Léonard Elie Akpo

Journal of Asian Scientific Research, 2012, vol. 2, issue 9, 451-465

Abstract: The composition of the herbaceous vegetation of the Lower delta of Ouémé was assessed using phytoecological data records performed following the method of Braun-Blanquet from a systematic sampling transect. The observations were made in 10 m x 10 m plots. Herbaceous flora consisted of 257 species distributed in 179 genera and 60 families which most represented species were Leguminosae, Cyperaceae, Asteraceae and Convolvulaceae. The most frequent species were: Ipomoea aquatica (39%), Echinochloa pyramidalis (34%), Leersia hexandra (27%), Justicia anselliana (25%) and Alternanthera sessilis (22%). The number of species was around 7 in aquatic vegetation and 174 in fields and fallows. The diversity index was 0.33 to 3.42 bits with a Pielou equitability from 0.28 to 0.96. Species with wide biogeographical distribution types were dominant (53% of the area).

Keywords: Flora; Herbaceous vegetation; Composition; Lower delta of ouémé; Southern Benin (search for similar items in EconPapers)
Date: 2012
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