The study is conducted in semi deciduous rain forest zone of southern Cameroon to appreciate the ... more The study is conducted in semi deciduous rain forest zone of southern Cameroon to appreciate the impact of cocoa agroforest on plant biodiversity conservation and carbon sequestration. Twenty-four transects of 1.5 km long and 10 m wide were established in eight villages to evaluate the cover percentage of cocoa compare to other land use system (LUS). Forty five plots of 625 m2 (25 m x 25 m) each were surveyed in these villages. In these plots, all the individuals with DBH (Diameter at the Breast Height) greater or equal to 4 cm were recorded. The destructive method was used to evaluate carbon sequestration in different LUS for herbaceous plants, small woody plants, litter and roots, while the allometric equation of Brown was used for all individuals with DBH ≥ 4 cm. Seven LUS were identified in the Yaounde region: 23 % of these were cultivated land, 36 % were fallows, 16 % were cocoa field and 5 % represented the secondary forest derived from the slash and burn practices. In the regions of Mbalmayo and Ebolowa, eight LUS were identified, of which six shared with the region of Yaounde and two different, the degraded forest and swampy forest. Species encountered in cocoa agroforest represent 33.78 % of the total flora of the area. Fruit trees were abundant in those villages which have access to market (Persea americana, Dacryodes edulis, Citrus spp), while in Ambam region, original forest species mostly timber species were encountered (Baillonella toxisperma, Guibourtia tessmannii, Terminalia superba, Milicia excels). This agroforest can accumulate about 251.14 t C/ha. Theobroma cacao hosted about 21.51 t C/ha. The root system of cover species stocks an important quantity of carbon.
Parkia biglobosa is one of the most important indigenous agroforestry tree species that is highly... more Parkia biglobosa is one of the most important indigenous agroforestry tree species that is highly valued by the local populations in the sudano-guinea savannah region of Africa. This study was carried out in the periphery of Ngaoundere in order to study its ecological characteristics, its exploitation and to contribute to the development of strategies for its conservation. The results showed
1. Objectif general Evaluer l’effet de l’exploitation forestiere a impact reduit sur la conservat... more 1. Objectif general Evaluer l’effet de l’exploitation forestiere a impact reduit sur la conservation des stocks de carbone forestier. 2. Objectifs specifiques (OS) OS1 : Determiner les superficies perturbees et conservees par les activites de l’exploitation forestiere; OS2 : Evaluer les stocks de carbone perdus et conserves suite a une exploitation forestiere a impact reduit. 3. Hypotheses H1 : Une pratique de l’exploitation forestiere suivant les regles de l’EFIR conduit a la reduction des superficies forestieres perturbees. H2 : Les stocks de carbone sont conserves apres une exploitation forestiere a impact reduit. 4. Methodologie 4.1 Site d’etude L’etude est realisee dans la region de l’Est Cameroun plus precisement dans le Departement du Haut-Nyong (commune de Lomie-Mesok). Elle concerne les UFA 10030/10031 regroupees de la societe PALLISCO. 4.2 Methode de collecte des donnees La collecte des donnees a consiste a l’exploitation des rapports annuels de suivi evaluation post- exploitation des Assiettes Annuelles de Coupe (AAC) 04 et 05 avec la collaboration de l’equipe de suivi evaluation de PALLISCO en ce qui concerne les superficies perturbees par les operations forestieres. L’inventaire des ligneux a consiste a determiner en plus du nom de l’espece, le diametre et la hauteur de l’arbre pour l’evaluation du carbone sur un hectare de cette foret. Ceci s’est fait dans une zone temoin suivant la methode adaptee de Hairiah (2010). Evaluer le carbone perdu et conserve revient a la comparaison des donnees des deux AAC.
The study is conducted in semi deciduous rain forest zone of southern Cameroon to appreciate the ... more The study is conducted in semi deciduous rain forest zone of southern Cameroon to appreciate the impact of cocoa agroforest on plant biodiversity conservation and carbon sequestration. Twenty-four transects of 1.5 km long and 10 m wide were established in eight villages to evaluate the cover percentage of cocoa compare to other land use system (LUS). Forty five plots of 625 m2 (25 m x 25 m) each were surveyed in these villages. In these plots, all the individuals with DBH (Diameter at the Breast Height) greater or equal to 4 cm were recorded. The destructive method was used to evaluate carbon sequestration in different LUS for herbaceous plants, small woody plants, litter and roots, while the allometric equation of Brown was used for all individuals with DBH ≥ 4 cm. Seven LUS were identified in the Yaounde region: 23 % of these were cultivated land, 36 % were fallows, 16 % were cocoa field and 5 % represented the secondary forest derived from the slash and burn practices. In the regions of Mbalmayo and Ebolowa, eight LUS were identified, of which six shared with the region of Yaounde and two different, the degraded forest and swampy forest. Species encountered in cocoa agroforest represent 33.78 % of the total flora of the area. Fruit trees were abundant in those villages which have access to market (Persea americana, Dacryodes edulis, Citrus spp), while in Ambam region, original forest species mostly timber species were encountered (Baillonella toxisperma, Guibourtia tessmannii, Terminalia superba, Milicia excels). This agroforest can accumulate about 251.14 t C/ha. Theobroma cacao hosted about 21.51 t C/ha. The root system of cover species stocks an important quantity of carbon.
Parkia biglobosa is one of the most important indigenous agroforestry tree species that is highly... more Parkia biglobosa is one of the most important indigenous agroforestry tree species that is highly valued by the local populations in the sudano-guinea savannah region of Africa. This study was carried out in the periphery of Ngaoundere in order to study its ecological characteristics, its exploitation and to contribute to the development of strategies for its conservation. The results showed
1. Objectif general Evaluer l’effet de l’exploitation forestiere a impact reduit sur la conservat... more 1. Objectif general Evaluer l’effet de l’exploitation forestiere a impact reduit sur la conservation des stocks de carbone forestier. 2. Objectifs specifiques (OS) OS1 : Determiner les superficies perturbees et conservees par les activites de l’exploitation forestiere; OS2 : Evaluer les stocks de carbone perdus et conserves suite a une exploitation forestiere a impact reduit. 3. Hypotheses H1 : Une pratique de l’exploitation forestiere suivant les regles de l’EFIR conduit a la reduction des superficies forestieres perturbees. H2 : Les stocks de carbone sont conserves apres une exploitation forestiere a impact reduit. 4. Methodologie 4.1 Site d’etude L’etude est realisee dans la region de l’Est Cameroun plus precisement dans le Departement du Haut-Nyong (commune de Lomie-Mesok). Elle concerne les UFA 10030/10031 regroupees de la societe PALLISCO. 4.2 Methode de collecte des donnees La collecte des donnees a consiste a l’exploitation des rapports annuels de suivi evaluation post- exploitation des Assiettes Annuelles de Coupe (AAC) 04 et 05 avec la collaboration de l’equipe de suivi evaluation de PALLISCO en ce qui concerne les superficies perturbees par les operations forestieres. L’inventaire des ligneux a consiste a determiner en plus du nom de l’espece, le diametre et la hauteur de l’arbre pour l’evaluation du carbone sur un hectare de cette foret. Ceci s’est fait dans une zone temoin suivant la methode adaptee de Hairiah (2010). Evaluer le carbone perdu et conserve revient a la comparaison des donnees des deux AAC.
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