Analyse Phytoécologique de la Flore Ligneuse de la Haute Sangha (République du Congo)

Kimpouni, Victor; Apani, Ernest; Motom, Marcel

doi:10.5252/a2013n1a9

Cited by 12 publications

(17 citation statements)

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“…Cette couverture forestière étant « discontinue », les trois massifs sont d'inégale superficie. Au Sud, les massifs du Mayombe (1,2 million ha) et du Chaillu (3,3 millions ha) ; le massif du Nord Congo (15,3 millions ha) dans la partie septentrionale (De Wasseige et al, 2012, 2014Kimpouni et al, 2013Kimpouni et al, , 2014. Ce dernier couvre deux faciès écologiques basés sur la nature du substrat.…”

Section: Introductionunclassified

“…La forêt inondée de la Basse Sangha (20%) et celle de terre ferme de la Haute Sangha (31%). Au plan phytogéographique, la flore du Nord-Congo démarque deux districts phytogéographiques et subit les influences des éléments Atlantique de l'aire nigéro-camerouno-gabonaise au Sud, camerounocongolais au Nord et congolais à l'Est (Kouka, 2006 ;Kimpouni et al, 2013). Suivant la chorologique africaine, notamment du centre d'endémisme guinéo-congolais, la flore du Congo dans son ensemble se développe dans le couloir du « Sangha River » défini par White (1986) et reste très mal connue.…”

Section: Introductionunclassified

“…Au niveau actuel des connaissances sur la diversité végétale, le massif du Nord Congo est le plus riche et le plus diversifié des trois (De Wasseige et al, 2012, 2014Kimpouni et al, 2013Kimpouni et al, , 2014. Au regard des potentialités économiques prouvées par les travaux d'inventaire botanique de Rollet (1964), de Bégué (1967), du CTFT (1974), de Hecketsweiler (1990), de Hecketsweiler et al (1991), la végétation et la flore du Nord-Congo font l'objet de plusieurs investigations relatives à la mise en valeur des ressources ligneuses et non ligneuses.…”

Section: Introductionunclassified

“…Il est centré sur une analyse de la phytodiversité ligneuse et l'influence des éléments phytogéographiques. Les hypothèses de travail se déclinent ainsi qu'il suit : les forêts du Sud de la Haute Sangha se développent sous la dépendance de l'élément Atlantique de l'aire nigéro-camerouno-gabonaise, d'une part, et, dominées floristiquement par les (Kouka, 2006 ;Van Loon, 2009 ;Gillet, 2013 ;Kimpouni et al, 2013). Ces faciès sont les plus représentatifs de cet écosystème et les moins étudiés de la flore congolaise.…”

Section: Introductionunclassified

“…De ce fait, la forêt de Lossi bénéficie d'un statut de protection à travers la loi forestière. La végétation du Congo étant planitiaire, le gradient d'altitude de la forêt de Lossi oscille entre 200 et 400 m (Kimpouni et al, 2013). Cet écosystème évolue sous un climat équatorial de type AW3 suivant la classification de Köppen (1936).…”

Section: Introductionunclassified

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Phytoécologie des faciès à Marantaceae de la forêt de Lossi (Congo, Brazzaville)

Loe¹,

Ngoule²,

Ngene³

et al. 2017

Int. J. Bio. Chem. Sci

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RÉSUMÉLa forêt à Marantaceae de Lossi, au Sud de la Haute Sangha, est étudiée suivant un transect de 5000 m traversant trois faciès (terre ferme, périodiquement inondé et marécageux). L'inventaire couvre 2,5 ha pour les arbres de 10 ≤ dhp < 70 cm et 25 ha pour ceux de dhp ≥ 70 cm. 178 espèces sont recensées pour une quarantaine de familles et 1168 arbres. Phytoecology of Marantaceae facies in the Lossi forest (Congo, Brazzaville)ABSTRACT Phytoecologic of Marantaceae facies in the Lossi forest (Congo, Brazzaville). The Lossi Marantaceae forest, in the South of Haute Sangha, is studied along a transect of 5000 m crossing three facies (land, periodically flooded and swampy). The inventory covers 2.5 ha for trees of 10 ≤ dhp < 70 cm and 25 ha for those of dhp ≥ 70 cm. 178 species are recorded for about forty families and 1168 trees. There are 903 trees of 10 ≤ dhp < 70 cm and 265 dbh ≥ 70 cm; 164 species of 10 ≤ dhp < 70 cm against 56 for the dhp ≥ 70 cm of which 14 are specific. The floristic composition reveals few common species. Biodiversity indices show a high degree of diversification, low floristic richness and a preponderance of small diameter trees. The index of importance values coupled with the coefficient of abundance-dominance shows, depending on the forest type, a dominance of a few families. The values of the phytoecological data are lower than those known from the dense forests of Central Africa. Notwithstanding a large regenerative procession, the specific contribution V. KIMPOUNI / Int. J. Biol. Chem. Sci. 11(4): 1437-1460, 2017 1438 indicates the lack of natural regeneration, given the dominance of undergrowth taxa. Their affinity to the Atlantic forests of the Niger-Cameroonian-Gabonese area, including Scyphocephalium mannii and Dacryodes sp. which are the markers, is detected. Sarcochores dominates and endozoochories is the main mode of dissemination. The leaf type mesophylle, synonymous of heliophytes, predominates.

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Section: Introductionunclassified

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Phytoécologie des faciès à Marantaceae de la forêt de Lossi (Congo, Brazzaville)

Loe¹,

Ngoule²,

Ngene³

et al. 2017

Int. J. Bio. Chem. Sci

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Floristic composition and turnover analysis in Dahomey Gap and the surrounding sub‐humid Togolese mountain minor forest refuges: Importance for biogeography and biodiversity conservation in sub‐Saharan Africa

Adjossou

Kokou

Deconchat

2022

Ecology and Evolution

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The origin of Dahomey Gap (DG) flora is one of the central biogeographical questions in sub‐Saharan, which has been addressed in several studies. However, floristic evidence based on representative samples from the DG seems to be lacking in the scientific debate. The present study was conducted to fill this gap. Specifically, we assessed Togolese mountain riparian forests as minor forest refugia, examined their contribution to larger sub‐Saharan forest refugia, and discussed the significance of these findings for biogeography and biodiversity conservation. Southwest Togo, West Africa, and sub‐Saharan Upper Guinea Region Floristic data were collected in riparian forests through an intensive botanical inventory ( n = 198; 50 × 10 m 2 ). A comparative analysis was performed based on the floristic evidence related to forest refuges. The results showed significantly high species richness (868 species) and a high gamma and beta diversity associated with spatial turnover patterns. They also showed a high affinity between the study forests and large sub‐Saharan forest refugia. Riparian forests share about 60% of their current species richness with large sub‐Saharan forest refugia and contained refuge bio‐indicator species. The floristic evidence, consistent with those of other studies, suggests that Togolese mountains would have very ancient origins and have experienced paleoclimatic events. The studied riparian would have served as refuges during recurrent climatic episodes. Our results support the minimal forest fragmentation hypothesis (network of refugia along rivers). However, they seem to be incompatible with the idea that the DG flora may be essentially a relic of the early Holocene. In sub‐Saharan Africa, where maintaining a vast area of natural forest is difficult due to human pressure, efforts to preserve maximum species diversity should include a focus on the conservation of minor forest refuges, particularly in sub‐humid mountain riparian zone.

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Ethnobotanical and phytotherapeutic study from Kouni community of the sub-prefecture of Kayes (Bouenza – Congo)

Kimpouni

Mamboueni

Tsoungould

et al. 2019

Heliyon

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The ethnobotanical and phytotherapeutic study conducted in Mvouandzi (4°10′00″ S, 13°25′00″ E), sub-prefecture of Kayes (Bouenza - Congo), is based on the floristic inventory, the personalized interviews and focus groups. The target population, aged between 15 to 70 years or more, is divided into 3 age groups, and consists of 46 informants (12 men and 34 women) who possess the plant secrets. The floristic inventory lists 60 useful species, corresponding to 53 genera and 35 families. The medicinal cohort is associated with 109 recipes and 57 diseases and symptoms. Classified as a sphere of diseases and symptoms, infectious and parasitic diseases predominate (27.11%) and retain 30.27% of recipes. All organs (vegetative and generative) intervene in the daily satisfaction of the needs of the populations. Ethno-sociological analysis reveals that the level of endogenous knowledge is proportional to the subjects' age and in this matter, women by virtue of their role as manager and guardian of morals, excel in the exploitation of empirical knowledge. Data on the value of ethnobotanical use, the informant consensus factor and the level of fidelity show that these plants are strongly involved in the primary care of this society. Notwithstanding the inseparable link between man and his environment, the value associated with this biodiversity, the socio-cultural foundation of the Kouni ethnic-linguistic community, is inevitably eroded. The reasons for this are the rural exodus, the main corollary of which is the ageing of the population, and the effects inherent in the construction of physical communication infrastructures.

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Analyse Phytoécologique de la Flore Ligneuse de la Haute Sangha (République du Congo)

Cited by 12 publications

References 12 publications

Phytoécologie des faciès à Marantaceae de la forêt de Lossi (Congo, Brazzaville)

Phytoécologie des faciès à Marantaceae de la forêt de Lossi (Congo, Brazzaville)

Floristic composition and turnover analysis in Dahomey Gap and the surrounding sub‐humid Togolese mountain minor forest refuges: Importance for biogeography and biodiversity conservation in sub‐Saharan Africa

Ethnobotanical and phytotherapeutic study from Kouni community of the sub-prefecture of Kayes (Bouenza – Congo)

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