Transformations de la flore d\'une forêt dense sémi décidue : impact des activités humaines (Centre Ouest de la Côte d\'Ivoire)

Sangne, Yao Charles; Adou-Yao, Y; N'Guessen, KE

doi:10.4314/aga.v20i1.1731

Cited by 5 publications

(5 citation statements)

References 3 publications

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“…The anthropogenic activities including annual bush fire and persistent agriculture in both riparian forests and forests of plateaus induce some exotic introduced species in these areas (Appendix) as had found Asia et al (2008) and Akoègninou (2004). Depending on the intensity of the bush fires related to the annual drought and the quantity of the vegetation burn these forest groups can have a drastic decrease in plant richness (Sangne et al, 2008). But these two forest groups harbor higher richness, diversity and equitability of woody plants with DBH≥ 10 cm than the forest reserves in Dimbokro region (Table 2).…”

Section: Discussionmentioning

confidence: 99%

Floristic Diversity of the Natural Forests of Dimbokro Region, Centre-Eastern Côte d’Ivoire

Rita

François

Édouard

2018

ESJ

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This study, carried out in three types of forest types (reserve, riparian and of plateaus) in a savannah and forest mosaic region of Côte d'Ivoire, aims to arise up the floristical characteristics of these natural forests. Trees and lianas with DBH≥10 cm were sampled into 30 plots of 50mx20m per forest type and named botanically. The floristic diversity and taxa distribution were analyzed using various coefficients and a Factorial Correspondence Analysis respectively. We found 89 species belonging to 77 genera and 36 families. The most abundant taxa were Verbenaceae family (43%), Leguminosae-Caesalpinioideae subfamily (19%), Leguminosae-Mimosoideae subfamily (6%), Malvaceae family (6%), Sapotaceae family (6%), Moraceae family (4%) and Leguminosae-Papilionoideae subfamily (3%). Both riparian forests and forests of plateaus showed higher species richness and diversity and were similar for these parameters. Average species richness varied from 5 in forest reserve to 9 in both riparian forests and forests of plateaus respectively. Shannon-Weaner's diversity index was set between 0.832 in the forest reserves and 1.723 in the riparian forests while the equitability index of Pielou varied from 0.516 in the forest reserves to 0.789 in the riparian forests. The forest reserves and of plateaus showed similar spatial distribution of the woody plants with DBH ≥ 10 cm.

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Section: Discussionmentioning

confidence: 99%

Floristic Diversity of the Natural Forests of Dimbokro Region, Centre-Eastern Côte d’Ivoire

Rita

François

Édouard

2018

ESJ

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“…Indeed, the quoted authors carried out the floristic inventories on a wider surface. Also the anthropic activities resulted in the destruction of the forest, do not support the survival of these species which search a particular microclimate as it was mentioned by Sangne et al, [20]…”

Section: G3 G2mentioning

confidence: 96%

Impacts of the anthropic activities of the decade of politic and army crisis on the diversity of the woody forest plants in the south of the Sangbé Mount national park, Côte d'Ivoire

Kouassı

Trabi

Siendou

2018

GSC Biol. Pharm. Sci.

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“…La déforestation en Côte d'Ivoire a touché toutes les régions et particulièrement celles du centre ouest qui a perdu 97 % de son couvert forestier dense de 1960 à 2000 (Koné, 2015;Koné et al, 2014). Cette partie du territoire ivoirien a fait l'objet de nombreux travaux de recherche (Chauveau et al, 1981;Koné et al, 2010;Kouamé, 2000;Kouassi et al, 2009;N'Dri & Gnahoua, 2008;OIBT, 2004;Sagne et al, 2008). Certains de ces travaux ont traité des interrelations entre les cultures et la diversité végétale.…”

Section: Résuméunclassified

Impact des Intrusions Paysannes sur la Physionomie et la Dynamique de la Végétation de la Forêt Classée de Laouda au Centre-Ouest de la Côte d’Ivoire

Joachim

Koné

Douffi

et al. 2019

ESJ

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Forests disappearance in Côte d'Ivoire is attributable to peasant intrusions into protected areas, including classified forests. The loss of biodiversity is a consequence of this disappearance. Laouda classified forest, which is the subject of this study, is strongly penetrated by peasants for crops. To better understand the impact of these intrusions, this paper focuses on evaluating the dynamics between 1986 and 2017 starting from the satellite imagery, and then to characterize land covers or land uses of the classified forest. The supervised classification method by neuron network was used on the Landsat TM and OLI images of 1986 and 2017. This was preceded by physiognomic characterization of vegetation types. The different vegetation formations present in this classified forest are dense forests, secondary forests, regenerated forest, and fallows. These habitats have low density values (904.16 to 608.33 stems / ha) and basal area (1.06 to 4.3 m² / ha). The dynamics over time of land use between 1986 and 2017 showed a regression of forests in favor of crops and fallows. Forest formations degradation process is dissection and fragmentation for respectively dense forests and secondary forests. Artificializations or apparitions have been observed at the level of fallows and crops, with the process of creation and aggregation, respectively. During this period, 14.27% or 568.37 ha of the landscape occupied by the forests was converted into crops and fallows. This situation occurs due to

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Transformations de la flore d\'une forêt dense sémi décidue : impact des activités humaines (Centre Ouest de la Côte d\'Ivoire)

Cited by 5 publications

References 3 publications

Floristic Diversity of the Natural Forests of Dimbokro Region, Centre-Eastern Côte d’Ivoire

Floristic Diversity of the Natural Forests of Dimbokro Region, Centre-Eastern Côte d’Ivoire

Impacts of the anthropic activities of the decade of politic and army crisis on the diversity of the woody forest plants in the south of the Sangbé Mount national park, Côte d'Ivoire

Impact des Intrusions Paysannes sur la Physionomie et la Dynamique de la Végétation de la Forêt Classée de Laouda au Centre-Ouest de la Côte d’Ivoire

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