12 research outputs found

    Dynamique De La Végétation De Bamo Et Stocks De Carbone Dans La Mosaïque De Végétation

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    This study was conducted in Agboville, Ivory Coast. The objective was (1) to characterize the floristic composition, dynamics, and structure of tree diversity of postcultural fallows; and (2) establish the relationship between the diversity and storage of carbon in timber biomass. The study relied on a network of 50 temporary plots. There were 31 postcultural fallows and 19 plots of primary forest. This study has identified 417 plant species distributed in 306 genera and 83 families. Tree density within postcultural fallows varied between 1025 to 5975 stems / ha, and the analysis showed that the density increases with the age of the postcultural fallows. Tree sampling was non-destructive and to estimate C storage, an allomectric models for above and belowground biomasses was used. Mean estimate of carbon (C) stocks in biomass were 80.25 tC / ha for groupe A (fallows from 4 to 8 years) and 256.5 tC / ha for group D (fallows from 14 to 24 years). These values remain far below those seen in the groups of primary forests with lateritic soil (1335.25 tC / ha). Results showed the ability of some postcultural fallows to store much C. It demonstrated that storage depends mainly on age and conserved species. This supports the idea of employing REDD+ processes in enhancing the ecological value associated with carbon

    Analyse De La DiversitĂ© Floristique De La ForĂȘt ClassĂ©e D’agbo I (CĂŽte d’Ivoire)

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    This study was carried out in the Agbo I classified forest (6 ° 24 '- 6 ° 41' N, 4 ° 50 '- 4 ° 09' W), which covers 15,575 ha. It contributes to a better knowledge of the dense semi-deciduous moist forest of Nesogordonia papaverifera (A. Chev.) Cap. (Malvaceae) and Khayaivorensis A. Chev. (Meliaceae). The surface surveys coupled with the itinerant inventories made it possible to have an inventory of 686 species, which are divided into 428 genera and 101 families. The most abundant families are Fabaceae, Rubiaceae, Malvaceae, Apocynaceae, and Euphorbiaceae. Out of these species, 84.11% are phanerophytes and 3.50% are hemicryptophytes. In conclusion, this study improves the knowledge which is based on the composition, structure, and diversity of the woody vegetation of the Agbo I forest. The results show that the species richness of the Agbo I classified forest is important. However, this floristic richness of the Agbo I listed forest is sufficient to justify its protection and sustainable management for the conservation of biodiversity in CÎte d'Ivoire

    Systematic and plant geography analysis of BadĂ©nou forest (Korhogo, CĂŽte d’Ivoire)

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    This study was initiated to contribute to the sustainable management of the BadĂ©nou classified forest. Its objective was to contribute to a better knowledge of the flora of this classified forest and, beyond that, to provide details on the distribution of species on the scale of CĂŽte d'Ivoire. Surface survey methods and itinerant inventories were adopted during this work in 30 plots, 25 of which were set aside for post-cultural fallow. A total of 241 species were recorded throughout the massif, divided into 184 genera and 53 families. The botany inventories in all parts of the forest helped identify 241 species have been recorded in BadĂ©nou forest during field investigations, distributed among 183 genera and 53 families. Among those species, 162 (67.22%), 12 (4.98%), 10 (4.15%) and 10 (4.15%) are phanerophytes, therophytes, geophytes and hemicryptophytes, respectively. 34 species (14.11%) are lianas. Most species are dispersed by endozoochory (108 species 44.40%), either bear small, fleshy fruits that are dispersed by animals, either by endozoochory (106 species = 43.98%). Phytochory analysis shows relevant proportion of widespread species (96 species = 39.83%) compared to endemic guineo-congolian species (44 species = 18.26%). 5 species (2.07%) are guineo-congolian species that are endemic from West Africa, among which only one was endemic from CĂŽte d’Ivoire. Those proportions indicate that the forest under study is included in dry rainforest sensu Guillaumet & Adjanohoun, and match with the widespread guineo-congolian–soudano-zambezian zone defined by White & Edwards. Unfortunately, this forest is still under enormous human pressure. Conservation efforts for endemic, rare and endangered species and the classified forest itself must be a priority. La prĂ©sente Ă©tude a Ă©tĂ© initiĂ©e pour contribuer Ă  la gestion durable de la forĂȘt classĂ©e de BadĂ©nou. Elle avait pour objectif de contribuer Ă  une meilleure connaissance de la flore de cette forĂȘt classĂ©e et, au-delĂ , Ă  apporter des prĂ©cisions sur la rĂ©partition des espĂšces Ă  l’échelle de la CĂŽte d’Ivoire. Les mĂ©thodes de relevĂ© de surface et des inventaires itinĂ©rants ont Ă©tĂ© adoptĂ©es lors de ces travaux dans 30 parcelles dont 25 dans les jachĂšres postculturales. Au total 241 espĂšces ont Ă©tĂ© recensĂ©es dans l’ensemble du massif, rĂ©parties en 184 genres et 53 familles. Parmi ces espĂšces, 162 (67,22%) sont des phanĂ©rophytes, 12 (4,98%) espĂšces sont des thĂ©rophytes, 10 (4,15%) espĂšces sont des gĂ©ophytes et 10 (4,15%) autres sont des hĂ©micryptophytes. 34 espĂšces (14,11%) sont des lianes. La plupart des espĂšces sont soit pourvues d’appendices permettant leur dissĂ©mination par le vent (108 espĂšces = 44,40%), soit possedent de petites diaspores charnues dont la dissĂ©mination est assurĂ©e par les animaux, soit par endozoochorie (106 espĂšces = 43,98%). L’analyse des phytochories montre une contribution importante des espĂšces Ă  large rĂ©partition (39,83% soit 96 espĂšces) par rapport aux espĂšces guinĂ©o-congolaises (18,26%). 5 espĂšces (2,07%) sont des guinĂ©o-congolaises endĂ©miques de l’Afrique de l’Ouest, dont une est endĂ©miques de CĂŽte d’Ivoire. Ces diffĂ©rentes proportions confirment l’appartenance de la forĂȘt Ă©tudiĂ©e Ă  la zone de forĂȘt dense sĂšche de Guillaumet & Adjanohoun, qui correspond Ă  la zone de transitio guinĂ©o congolais-soudano-zambĂ©zienne de White & Edwards. Malheureusement, la forĂȘt classĂ©e de Badenou subit encore d’énormes pressions anthropiques. Les efforts de conservation des espĂšces endĂ©miques, rares et menacĂ©es d’extinction et de la forĂȘt classĂ©e elle-mĂȘme doivent ĂȘtre une prioritĂ©

    Dynamique de reconstitution de la biodiversitĂ© vĂ©gĂ©tale de la forĂȘt classĂ©e de Foumbou (Nord de la CĂŽte d’Ivoire)

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    La forĂȘt est un milieu essentiellement dynamique dont les multiples composants sont en perpĂ©tuelle Ă©volution. La forĂȘt classĂ©e de Foumbou, situĂ© dans le dĂ©partement de Korhogo au Nord de la CĂŽte d’Ivoire, est confrontĂ©e Ă  l’orpaillage clandestin couplĂ© aux infiltrations paysannes. Ces exploitations demeurent une prĂ©occupation Ă©cologique majeure car elles menacent les services Ă©cosystĂ©miques. Ces travaux avaient pour objectif d'Ă©valuer la diversitĂ© floristique de la forĂȘt classĂ©e de Foumbou dans une perspective de gestion durable forestiĂšre de la biodiversitĂ©. Les mĂ©thodes de relevĂ© de surfaces associĂ©es Ă  des inventaires itinĂ©rants ont Ă©tĂ© adoptĂ©es lors de ces travaux dans vingt parcelles de 2000 m2 chacune. Les analyses multivariĂ©es ont permis d’identifier cinq stades de succession secondaire postculturale le long d’une chronosĂ©quence de 35 ans. Les paramĂštres de composition augmentent avec l’ñge de la jachĂšre (biotopes). La forĂȘt renferme, au total, 259 espĂšces, rĂ©parties en 191 genres et 56 familles. Du point de vue de la composition floristique, cette forĂȘt est riche en Fabaceae, en Rubiacea, en Combretaceae, en Malvaceae, en Moraceae, en Poaceae et en Lamiaceae. Dans cette Ă©tude, les biotopes les plus diversifiĂ©s sont les jachĂšres de plus de 20 ans et les ForĂȘts anciennes. Le site renferme Ă©galement des espĂšces endĂ©miques et des espĂšces Ă  statuts particuliers. La flore de cette forĂȘt est diversifiĂ©e avec une rĂ©partition Ă©quitable des espĂšces au sein des biotopes. De ce fait, des actions de gestion intĂ©grĂ© et participative de cette forĂȘt s’imposent pour minimiser sa dĂ©gradation. English title: Dynamics of reconstitution of the vegetal biodiversity of the Foumbou class forest (north of the Ivory Coast) The forest is an essentially dynamic environment whose multiple components are in perpetual evolution. The classified forest of Foumbou is confronted with clandestine gold panning coupled with peasant infiltration. These operations remain a major ecological concern because they threaten ecosystem services. The objective of this work was to assess the floristic diversity of the floristic diversity of the classified forest of Foumbou in order to promote its sustainable management. Surface survey methods and itinerant inventories were adopted during this work in twenty plots, sixteen of which were in post-cultivation fallows. Multivariate analyses identified five stages of postcultural secondary succession along a 35-year chronosequence. The compositional parameters increase with the age of fallow land. The forest contains a total of 259 species, divided into 191 genera and 56 families. From the point of view of floristic composition, this forest is rich in Fabaceae, Rubiacea, Combretaceae, Malvaceae, Moraceae, Poaceae and Lamiaceae. Of this study, the most diversified are the fallow land of more than 20 years and the Old Forest. The flora of the estate is diversified with an equitable distribution of species within the biotopes. Integrated and participative management of the forest is necessary to minimise the degradation of the site

    Etude ethnobotanique des Asteraceae mĂ©dicinales vendues sur les marches du district autonome d’Abidjan (CĂŽte d’Ivoire)

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    L’utilisation des plantes de notre environnement immĂ©diat dans les soins de santĂ© primaire en Afrique et surtout chez les populations pauvres, constitue une pratique trĂšs courante. Une enquĂȘte ethnobotanique menĂ©e auprĂšs de 110 herboristes des marchĂ©s du district autonome d’Abidjan (CĂŽte d’Ivoire) a permis de rĂ©pertorier 27 espĂšces vĂ©gĂ©tales appartenant Ă  la famille des Asteraceae. Ces espĂšces sont regroupĂ©es en 20 genres et 7 tribus. Le genre Vernonia (22,22%) est le plus reprĂ©sentĂ©. Les spectres morphologie et biologique montrent une prĂ©dominance d’herbes (85,19%) et de thĂ©rophytes (44,45%). Ces Asteraceae sont utilisĂ©es dans la formulation de 57 recettes pour combattre 70 affections. Les feuilles (43,18%) sont les organes les plus prisĂ©s. Le pĂ©trissage (38,60%) et la dĂ©coction (33,34%) sont les techniques de prĂ©paration mĂ©dicamenteuse les plus utilisĂ©es. Le dĂ©coctĂ©, le jus et la pĂąte sont les formes mĂ©dicamenteuses couramment prescrites et frĂ©quemment administrĂ©es en boisson (35,94%). Les maladies les plus frĂ©quemment citĂ©s sont le paludisme, les maladies infantiles et la grossesse. Les Asteraceae les plus sollicitĂ©es sont Acanthospermum hispidum, Ageratum conyzoides, Vernonia amygdalina. Il ressort de diverses Ă©tudes phytochimiques que l’effet curatif des plantes mĂ©dicinales est le fait de mĂ©tabolites primaires et surtout secondaires.© 2015 International Formulae Group. All rights reserved.Mots clĂ©s: Asteraceae, ethnobotanique, herboristes, plantes mĂ©dicinales, Abidjan, CĂŽte d’IvoireEnglish Title: Ethnobotanic study of medicinal Asteraceae sold on the markets of the autonomous district of Abidjan (CĂŽte d’Ivoire)English AbstractThe use of plants in our immediate environment in primary health care in Africa and especially in the poor populations is a very common practice. An ethnobotanical survey, carried out on 110 herbalists of the  markets of the autonomous district of Abidjan (CĂŽte d’Ivoire), has enabled to identify 27 plant species belonging to the family of Asteraceae. These species are grouped into 20 genera and 7 tribes. The genus Vernonia (22.22%) is the most represented. The morphological and biological analyses show a predominance of herbs (85.19%) and therophytes (44.45%). These Asteraceae are used in the formulation of 57 recipes to fight against 70 diseases. The leaves (43.18%) are the most valuable organs. Kneading (38.60%) and the decoction (33.34%) are drug preparation techniques most used. The decocted, the juice and the paste are the pharmaceutical forms commonly prescribed and frequently administered as drink (35.94%). The most frequently cited diseases are malaria, infantile diseases and pregnancy. The most requested of the Asteraceae are Acanthospermum hispidum, Ageratum conyzoides, Vernonia amygdalina. It is observed from the various phytochemical studies that the curative effect of the medicinal plants is the fact of primary and especially secondary metabolites.© 2015 International Formulae Group. All rights reserved.Keywords: Asteraceae, ethnobotanic, herbalists, medicinal plants, Abidjan, CĂŽte d’Ivoir

    DiversitĂ© floristique et infiltration humaine de la forĂȘt classĂ©e de la Besso (CĂŽte d’Ivoire)

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    Objectif: Contribuer Ă  une meilleure connaissance de la flore de la forĂȘt classĂ©e de la Besso et de caractĂ©riser les populations infiltrĂ©es et les cultures pratiquĂ©es dans cette forĂȘt classĂ©e.MĂ©thodologie et rĂ©sultats: La forĂȘt classĂ©e de Besso (CĂŽte d’Ivoire) couvre 23 100 ha sur est une forĂȘt dense semi-dĂ©cidue Ă  Celtis spp. et Triplochiton scleroxylon. La crĂ©ation de clairiĂšres culturales entre 1966 et 2012 malgrĂ© le classement de la forĂȘt est Ă  l’origine d’une mosaĂŻque de vĂ©gĂ©tations secondaires incluses dans une matrice de forĂȘt « primaire » que nous avons plus particuliĂšrement Ă©tudiĂ©. Les relevĂ©s de surfaces couplĂ©s aux inventaires itinĂ©rants ont permis d’inventorier 474 espĂšces, qui se repartissent en 330 genres et 91 familles. Les familles les plus abondantes sont Fabaceae, les Rubiaceae, les Euphorbiaceae, les Moraceae, les Malvaceae, les Meliaceae, les Moraceae, les Annonaceae, les Sapindaceae et les Poaceae. Parmi ces espĂšces, 79 % sont des phanĂ©rophytes et 3 % des hĂ©micryptophytes.Conclusion: Malheureusement, cette forĂȘt est en progressive dĂ©gradation Ă  cause des activitĂ©s humaines qui menacent la biodiversitĂ© vĂ©gĂ©tale et animale de cette forĂȘt. Ainsi, pour rĂ©duire le phĂ©nomĂšne de dĂ©gradation des forĂȘts en gĂ©nĂ©rale, plusieurs actions de gestion durable pourraient ĂȘtre entreprises par l’État, les ONG et la population. Notamment par la crĂ©ation des zones de conservation de plantes par des mises en dĂ©fens de jachĂšres.Mots clĂ©s: BiodiversitĂ© vĂ©gĂ©tale, ForĂȘt classĂ©e de la Besso, CĂŽte d’IvoireEnglish AbstractEnglish Title: Floristic diversity and human impact on Besso forest in Ivory CoastObjective: To contribute significantly to the knowledge of the flora of Besso forest and to evaluate the human impact.Methodology and results: The Besso forest in Ivory Coast) covers 23 100 ha and determines a potential vegetation corresponding to the Celtis spp.-Triplochiton scleroxylon semi-deciduous tropical forest. Shifting cultivation between 1966 and 2012 has led to a mosaic of secondary plant communities that are included in an old-growth forest matrix. For hundred seventy for (474) species were recorded in this forest during the field investigations, distributed among 330 genera and 91 families. The most common families were Fabaceae, Rubiaceae, Euphorbiaceae, Moraceae, Malvaceae, Meliaceae, Moraceae, Annonaceae, Sapindaceae and Poaceae. Among those species, 79 % and 3 % are phanerophytes and hemicryptophytes, respectively.Conclusion: Unfortunately, this forest is gradual degradation due to uncontrolled human’s activity. Thus, to reduce the degradation phenomenon of the forets in general, several actions of sustainable managements could be undertaken by the state, Non-Governmental Organisation (NGO) and the population. In particular by the creation of preservation zones of plants, the creation of collective gardens of plants.Keywords: Plant biodiversity, Besso forest, Ivory Coas

    Inventaire Et Identification Des Plantes Melliferes De La Zone Guineenne : Cas De La Foret Yapi Daniel Et Extension (Sud De La Cote D’ivoire)

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    Dans le cadre des Ă©tudes de classement de la forĂȘt Yapi Daniel en rĂ©serve naturelle, une Ă©tude sur sa flore mellifĂšre et ses environs a Ă©tĂ© rĂ©alisĂ©e. Les plantes mellifĂšres ont Ă©tĂ© identifiĂ©es par observation directe dans des placettes de 1600 mÂČ installĂ©es de maniĂšre alĂ©atoire dans la forĂȘt et par des relevĂ©s itinĂ©rants dans un rayon d'un kilomĂštre autour du rucher. Au total, quarante-huit (48) plantes mellifĂšres ont Ă©tĂ© inventoriĂ©es, dont 35 rĂ©pertoriĂ©es dans la forĂȘt avec un taux de sĂ©lection de 13,20% des 265 plantes Ă  fleurs de la forĂȘt. Ces plantes se rĂ©partissent en 43 genres et 19 familles botaniques. Les Malvaceae, les Fabaceae, les Combretaceae et les Moraceae sont les plus fournies en espĂšces. 85,41% sont des plantes spontanĂ©es composĂ©es d'arbres et d'arbustes (77,08%), qui fleurissent majoritairement (60,41%) pendant la saison des pluies (Avril-Juillet; Octobre-Novembre) et dont prĂšs de la moitiĂ© (44%) sont butinĂ©es pour le nectar. Within the framework of the studies for the classification of the Yapi Daniel forest as a nature reserve, a study on its honey-bearing flora and its surroundings has been carried out. Melliferous plants were identified by direct observation in plots of 1600 mÂČ installed randomly in the forest and by itinerant surveys in a radius of one kilometer around the apiary. A total of forty-eight (48) honey plants were inventoried, 35 of which were found in the forest with a selection rate of 13.20% of the 265 flowering plants in the forest. These plants are divided into 43 genera and 19 botanical families. Malvaceae, Fabaceae, Combretaceae and Moraceae are the most abundant in species. 85.41% are spontaneous plants composed of trees and shrubs (77.08%), which flower mostly (60.41%) during the rainy season (April-July; October-November) and almost half (44%) are collected for nectar

    CaractĂ©ristiques Physicochimiques RĂ©coltĂ©s des Miels de la Sous-PrĂ©fecture de Cechi (Dans le DĂ©partement D’Agboville, CĂŽte D’Ivoire)

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    La caractĂ©risation des miels en dĂ©veloppement d’un pays est nĂ©cessaire pour leur valorisation. Cette Ă©tude est une contribution Ă  la connaissance de la qualitĂ© des miels des forĂȘts de la CĂŽte d’Ivoire. Des Ă©chantillons de miel de cinq localitĂ©s de la Sous-PrĂ©fecture de Cechi (Agboville) ont Ă©tĂ© Ă©tudiĂ©s. Les paramĂštres physicochimiques des miels ont Ă©tĂ© analysĂ©s pour vĂ©rifier leur conformitĂ© aux normes du Codex alimentarius. Ces analyses ont donnĂ© les valeurs moyennes suivantes : le pH est 3,55±0,46; la conductivitĂ© Ă©lectrique (σ) est 98,01±31 ÎŒS/cm, l’aciditĂ© libre est 19,50±4,47 mEq/Kg ; la densitĂ© relative est 1,42±0,07 ; la teneur en eau est de 20,2±3,11%, les cendres reprĂ©sentent 0,18±0,11% et la teneur en sucre totale est de 78,31±0,19%. La plupart de ces paramĂštres sont conformes au Codex alimentarius, Ă  l’exception des teneurs en sucres qui dĂ©passe la limite maximale acceptĂ©. Cela traduit que les miels analysĂ©s sont issus de nectar trop sucrĂ©s. The characterisation of a country's developing honeys is necessary for their valorisation. This study is a contribution of the knowledge of the Ivory Coast forests honeys quality. Honey samples from five localities of the Sub-Prefecture of Cechi (Agboville) were studied. The physicochemical parameters of the honeys were analyzed to verify their conformity to the standards of the Codex alimentarius. These analyses yielded the following average values: pH is 3.55±0.46; electrical conductivity (σ) is 98.01±31 ÎŒS/cm, free acidity is 19.50±4.47 mEq/Kg ; relative density is 1.42±0.07 ; water content is 20.2±3.11%, ash represents 0.18±0.11% and total sugar content is 78.31±0.19%. Most of these parameters are in conformity with the Codex Alimentarius, except for the sugar content which exceeds the maximum accepted limit. This means that the analyzed honeys are made from nectar with too much sugar
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