Diversité floristique et structure de la végétation ligneuse des parcs arborés de la zone soudanienne du Tchad

Mbaiyetom, Hervé; Tientcheu, Marie Louise Avana; Ngankam, Martin Tchamba; Taffo, Junior Baudoin Wouokoue

doi:10.4314/ijbcs.v15i1.7

Cited by 9 publications

(6 citation statements)

References 11 publications

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“…This difference could be justified by the fact that at Baloum, the greatest number of trees are in diameter class. It could also be justified by the fact that in the Baloum forests, large-diameter trees are felled immediately, whereas in the Bansoa large-diameter trees are felled very little [45][46][47][48][49][50][51][52][53][54][55][56][57].…”

Section: Quantities Of Carbon and Co2mentioning

confidence: 99%

Characterization and Carbon Sequestration Potential of Sacred Forests in the Western Highlands Cameroon

Tiokeng,

Sob,

Tsobou

et al. 2023

JOGEE

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Cameroon has a diversity of forest ecosystems, including sacred forests that have been preserved until now by traditional laws. The aim of this study was to characterize the vegetation of two sacred forests in the Western Highlands and to estimate the quantities of carbon stored by these forests. The inventories were carried out in 24 quadrats measuring 30 m x 30 m installed in the Bansoa and Baloum forests according to their surface area. Individuals with a diameter of 10 cm or more at breast height (1.30 m from the ground) were measured. Phytodiversity was assessed using the Shannon and Simpson indixes. The quantities of carbon stored by the sacred forests were obtained using allometric equations developed by other researchers and appropriate to the tropical zone. Overall, 50 species in 31 genera and 25 families were recorded. The diversity index values are low. They range from 1.47 to 2.52 bits per plot for the Shannon index, and from 0.70 to 0.91 for the Simpson index. Markhamia lutea and Cola acuminata are the most frequent and abundant species in the study area. The densities of individuals per hectare are 368 individuals/ha at Bansoa and 416 individuals/ha at Baloum and the basal area varies from 32.37 m2/ha to 38.44 m2/ha. The shrub layer dominates in both forests. Of the species recorded, 03 are Vulnerable and 02 are Endangered. Carbon sequestration was 286.84 t C/ha at Baloum and 232.44 t C/ha at Bansoa, with CO2 uptake of 1052.12 t CO2/ha and 853.55 t CO2 /ha respectively. The results of this study show that despite their small size, sacred forests play a significant role in the conservation of plant diversity and also help to reduce greenhouse gases in nature.

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Section: Quantities Of Carbon and Co2mentioning

confidence: 99%

Characterization and Carbon Sequestration Potential of Sacred Forests in the Western Highlands Cameroon

Tiokeng,

Sob,

Tsobou

et al. 2023

JOGEE

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“…Its value ranges from 0 to 1. It tends towards 0 when almost all individuals belong to a single species and takes the value of 1 when all species have exactly the same coverage (Mbaiyetom et al, 2021). E = H' / H max with H max = log2 S; where S is the total number of species.…”

Section: Data Analysis and Processingmentioning

confidence: 99%

Compositional and Structural Diversity of Woody Stands in the Community Forests of Rogho and Boala in Central-West Burkina Faso

Tiamiyu,

Yanogo,

Nacoulma

2023

IJSEI

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The biodiversity of community forests is poorly studied in Burkina Faso. This results in a lack of understanding of their ecological importance, which is characterized by neglect in their management. The main objective of this study is to characterize the flora and woody vegetation of the community forests of Rogho and Boala to demonstrate their importance. For this purpose, a forest inventory was conducted using stratified random sampling methods. Shannon, Simpson, Margalef, and Pielou diversity indices reveal significant biodiversity of the flora in both forests, with a better distribution of individuals within the species that make them up. The horizontal structure of the two woody populations is characterized by a predominance of individuals with small diameters (DBH € [5cm-25cm[) on either side, with respective regeneration rates of 58.36% and 22.46% for Rogho and Boala. Regarding the ecological importance of species, Lannea microcarpa has the highest Importance Value Index (IVI = 99.06) for the Rogho site, and Vitellaria paradoxa for the Boala site (IVI = 136.58). Phanerophytes dominate the flora of both forests with a strong presence of mesophanerophytes. The average density of woody plants is evaluated at 330.34 trees/ha and 742.01 trees/ha respectively in Rogho and Boala, with respective average land areas of 14.8 m2/ha and 119.78 m2/ha. This study highlights the strong ecological potential of the forests studied. Communal and regional authorities must develop strategies for the sustainable management of these forest areas.

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“…L'indice de diversité de Shannon H varie généralement de 1 à 5 bits. Si H € [0 ; 2,5] alors H peut être supposé faible ; Si H est compris entre 2,6 et 3,9 alors il peut être supposé moyen ; Si H est compris entre 4 et 5 alors il peut être supposé élevé (Mbaiyetom et al, 2021). L'équitabilité de Piélou (𝐸 𝑞 ) mesure le degré de diversité des écosystèmes par rapport au maximum possible.…”

Section: Analyse Des Données éValuation De La Diversité Des Espèces L...unclassified

Diversité et état de conservation des espèces ligneuses alimentaires à la périphérie de la Forêt Classée de la Lama (Bénin)

Assogbadjo¹,

Hounkpèvi²,

Barima³

et al. 2022

Int. J. Bio. Chem. Sci

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Les systèmes agroforestiers contribuent comme les forêts à la conservation physique et chimique du sol, à la régulation thermique et à la conservation de la biodiversité. Cette étude visait à caractériser la communauté des espèces ligneuses alimentaires dans quatre systèmes agroforestiers périphériques au noyau central de la Forêt Classée de la Lama. Au total, 770 placeaux carrés (30 m x 30 m) ont été installés de façon aléatoire dans les champs, plantations privées, jardins de case et jachères. Dans chaque placeau, des mesures dendrométriques (diamètre) ont été effectuées sur les individus de diamètre ≥ 5 cm à 1,30 m du sol. L’indice de similarité de Jaccard et le diagramme de Venn ont permis d’évaluer la similarité entre les systèmes agroforestiers. La valeur la plus élevée de l’indice de Shannon a été enregistrée dans les jachères. La structure en diamètre des ligneux présentait une prédominance des sujets de petit diamètre [5-25 cm [. Les jardins de case étaient les seuls regroupant des individus de petites tailles. Une faible variation floristique a été observée entre les systèmes. Il devient impérieux d’intervenir afin d’assurer la conservation de ces espèces. English title: Diversity and conservation status of woody food species at the periphery of the Lama forest reserve (Benin) Agroforestry systems, like forests, contribute to the physical and chemical conservation of the soil, to thermal regulation and to the biodiversity conservation. The study aimed to characterize the community of edible woody species in four agroforestry surrounding the central core of the Lama Forest Reserve. A total of 770 square plots (30m x 30m) were randomly installed in fields, private plantations, home gardens and fallows. In each plot, dendrometric measurements (diameter) were taken on individuals with a diameter ≥ 5 cm at 1.30 m from the ground. Jaccard similarity index and Venn diagram were used to assess the similarity between agroforestry systems. Species density varied significantly from fields to home gardens. The diameter structure of the woody plants showed a predominance of small diameter individuals [5-35 cm [. The home gardens were the only ones gathering individuals of small sizes. A low floristic variation was observed between the systems. It becomes imperative to intervene to ensure the conservation of these species.

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Diversité floristique et structure de la végétation ligneuse des parcs arborés de la zone soudanienne du Tchad

Cited by 9 publications

References 11 publications

Characterization and Carbon Sequestration Potential of Sacred Forests in the Western Highlands Cameroon

Characterization and Carbon Sequestration Potential of Sacred Forests in the Western Highlands Cameroon

Compositional and Structural Diversity of Woody Stands in the Community Forests of Rogho and Boala in Central-West Burkina Faso

Diversité et état de conservation des espèces ligneuses alimentaires à la périphérie de la Forêt Classée de la Lama (Bénin)

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