Analyse de la Diversité Floristique de Quelques îles Aménagées du Barrage de Buyo (Côte d’Ivoire)
TL;DR: In this paper, the authors focused on analyzing the floristic composition of islands of Buyo's dam after strong anthropization using surfaces surveys, linear surveys and itinerant surveys, and determined the floreistic composition and diversity were determined.
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Abstract: This paper focuses on analyzing the floristic composition of islands of Buyo’s dam after strong anthropization. Using surfaces surveys, linear surveys and itinerant surveys, the floristic composition and diversity were determined. Seven hundred and twenty-three plants species belonging to 353 genera and 99 families were recorded. The ecological importance of the species has been assessed from the Value of Significance. The study showed that for tree species with diameter ≥ 10 cm, the species Alchornea cordifolia, Ceiba pentandra, Theobroma cacao, and Lannea welwitschii were the richest and had the highest Indices of Value Importance. The mean richness of species showed a significant difference (p≤ 0. 03797) among the Islands of Buyo’s dam. Island D which is close to the Park with the presence of animals isrich in species(101 ± 10 74). Apolinaire and Laminebougou Islands farthest to the Park with strong agricultural activity are poor in species (51 ± 11. 14; 50 ± 6. 29). Floristic diversity and evenness do not vary statistically from one site to another. La presente etude se propose d’analyser la composition et la diversite floristique des iles du barrage de Buyo apres forte anthropisation. A l’aide de releve de surface, de releve lineaire et de releve itinerant, la composition et la diversite floristique de onze iles ont ete determinees. L’inventaire a permis de noter 723 especes de plantes reparties entre 353 genres et 99 familles. L’importance ecologique des especes a ete appreciee a partir de l’Indice de Valeur d’Importance. L’etude a montre que pour les arbres de diametre ≥ 10 cm, les especes Alchornea cordifolia, Ceiba pentandra, Theobroma cacao, Lannea welwitschii sont celles qui ont les plus forts indices de valeur d’importance des especes. La moyenne de la richesse specifique montre une difference significative (p≤ 0,03797) entre les differentes iles du barrage de Buyo. L’ile D, proche de la foret du Parc, avec une presence moyenne de mammiferes, est la plus riche en especes (101 ± 10, 74). Les iles Apollinaire et Laminebougou, plus eloignees de la foret mere et avec une intense activite, sont les plus pauvres en especes (51 ± 11,14 ; 50 ± 6, 29). La diversite floristique et l’equitabilite ne varient pas statistiquement entre les iles.
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