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Lucie Felicite Temgoua,Marie Caroline Momo Solefack,Princely Awazi Nyong,Patrick Tadjo 한국산림과학회 2020 Forest Science And Technology Vol.16 No.2
One of the forms of forest management is community forestry which is as an alternative to state-managed conservation. Knowledge of the wood potential and exploitable species is a prerequisite for the sustainable management of a community forest. This study carried out in the Cobaba community forest in Eastern Cameroon aimed to assess the floristic diversity and exploitable potential of timber species. A floristic inventory at a sampling rate of 8% was carried out and the volume of trees having reached the minimum exploitable diameter estimated. A total of 7736 commercial trees with dbh 20 cm were recorded, belonging to 65 species, 58 genera and 26 families. The Shannon–Weaver diversity index (H0 ) was 3.61. The density was 42.04 stems ha-1 and the basal area 16.43 m2 ha1 . A volume of timber of 31,929.21 m3 has been estimated for trees having reached the minimum exploitable diam�eter. About 30% of this volume is made up of high and medium commercial value species for which market demand exists. The most abundant species of high commercial value were Triplochyton scleroxylon, Entandrophragma cylindricum, and Milicia excelsa. For sustainable management and species conservation, we recommend that species with very low densities should be excluded from logging and for each species exploited, some well-conformed seed trees with a diameter greater than the minimum exploitable diameter should be left to ensure the renewal of the wood resource.
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Cedric, Chimi Djomo,Nfornkah, Barnabas Neba,Louis-Paul-Roger, Kabelong Banoho,Kevine, Tsoupoh Kemnang Mikelle,Awazi, Nyong Princely,Forje, Gadinga Walter,Louis, Zapfack Institute of Forest Science 2022 Journal of Forest Science Vol.38 No.3
Triplochiton scleroxylon K. Schum is the plant species most affected by logging activities in the East Region of Cameroon due to its market value. This logging has impacted the ecological niche of the fern plant for which limited research has been done. The aim of this study is to contribute towards improving knowledge of fern richness and biomass on T. scleroxylon within the Central African sub-region. Fern data collection was done on 20 felled/harvested T. scleroxylon where, in addition to fern inventory, fern biomass was collected by the destructive method. The diameter and height of T. scleroxylon measured were used as explanatory variables in allometric equations for fern biomass estimation. Fern inventory was characterized using diversity index. Eight fern species were recorded on T. scleroxylon (≈5 species/T. scleroxylon). The minimum diameter where fern could be found is 59.4 cm. The average fern biomass found was 23.62 kg/T. scleroxylon. Pearson correlation coefficient showed a positive correlation (r>0.55) between fern biomass and T. scleroxylon diameter. For allometric equation, the logarithmic model improved better the adjustment than the non-logarithmic model. However, the quality of the adjustment is improved more when only the diameter is considered as an explanatory variable. Fern biomass is estimated to 90.08 kg/ha<sup>-1</sup> with 76.02 kg/ha<sup>-1</sup> being lost due to T. scleroxylon exploitation in the study area. This study is a contribution towards increasing knowledge of fern diversity specific to T. scleroxylon, and also fern biomass contribution to climate change mitigation and the potential carbon loss due to T. scleroxylon exploitation.
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