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Analysis of the Spatio-Temporal Dynamics of Land Use in the Bamboutos Mountains of the West Region of Cameroon

Open Journal of Forestry 2022年第2期12卷 216-234页

作者： guy herman tchoutezou zanguim Abubakar Ali Shidiki Alphonse Loic Tcheugoue Tientcheu Martin Ngankam Tchamba Department of Forestry Faculty of Agronomy and Agricultural Sciences University of Dschang Dschang Cameroon Department of Geography Faculty of Arts Letters and Humanities University of Yaoundé 1 Yaoundé Cameroon

The current level of knowledge of the biophysical situation, human activity and governance in the Bamboutos Mountains does not shed enough light on the dynamics of the vegetation, the socio-economic aspects and ecological opportunities that are essential for a successful restoration initiative in this degraded landscape of the Bamboutos mountain ecosystems. The objective of the study was to map and analyze the dynamics of land use from Landsat images of 1980, 2000 and 2021. Supervised classification by maximum likelihood was applied and the dynamics were analyzed using area curves and calculations. The cartographic results were used to produce land use maps. The analysis of the land cover dynamics shows that the evolutionary trend of the vegetation formations is essentially regressive for agro-forests and dense forests at -21.20% and -3.62% respectively. The classes that showed a clear progression were bare soil (9.78%), crop land (8.03%), built-up areas (5.19%) and shrubby savannahs and grassland (1.84%). Agriculture, livestock grazing and demographic pressure are the main causes of land degradation and mutation of the landscape. The results of this study provide an understanding of the land-use history of this landscape, and a solid basis for planning a restoration initiative. They provide guidance on priority areas and types of restoration intervention from a social, economic and ecological perspective.

关键词： Bamboutos Mountains GIS Mapping Degradation Landscape Restoration

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Governance of Non-Timber Forest Products (NTFPs) Djansang (<i>Ricinodendron heudelotii</i>) and Wild Mango (<i>Irvingia gabonensis</i>) and Its Influence on the Livelihood of Rural Communities of Yokadouma in the East Region of Cameroon

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Open Journal of Forestry 2021年第2期11卷 153-170页

作者： Abubakar Ali Shidiki tchoutezou guy herman zanguim Ngankam Martin Tchamba University of Dschang Department of Forestry Dschang Cameroon

The objective of the study is to contribute to the sustainable governance of Non-Timber Forest Products (NTFPs) (Djangsa and Wild mangos) on rural livelihood of communities surrounding the rainforest in Yokadouma. The economic potential of Non-Forest Timber Products (NTFPs) and its influence on rural livelihood and development has made it a constant national and international policy debate. However, Cameroon policies and institutional Legal framework is inconsistent with the exploitation and valorisation of these important rural livelihood activities. This study was carried out in Yokadouma in the East Region of Cameroon between February and July of 2020. Respondents were drawn from a cross-section of NTFPs exploiters and marketers. Data was collected through the administration of semi-structured questionnaire design with the aim to answer the research objective. During the recognisances survey, 172 persons concerned in these activities were identified within the 09 villages in the Yokadouma divisi

关键词： NTFPs Value Chain Governance Djansang Wild Mangos Livelihood

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Analysis of Actors Involved in the Bamboo Value Chain and Strategies for the Development of the Bamboo Sector in the Menoua Division, West Region of Cameroon

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Open Journal of Forestry 2022年第1期12卷 122-141页

作者： Alvine Meyabeme Rene Kaam Nsim Mike Frederic Eba Nyong Princely Awazi herman zanguim Barnabas Neba Nfornkah Martin Ngankam Tchamba Department of Forestry Faculty of Agronomy and Agricultural Sciences The University of Dschang Dschang Cameroon International Bamboo and Rattan Organization (INBAR) Yaoundé Cameroon Department of Forestry and Wildlife Technology College of Technology The University of Bamenda Bambili Cameroon

Bamboo is an important non-timber forest product owing to its multipurpose nature. In Cameroon, bamboo has always been neglected and seen as worthless by many communities. However, in recent years, bamboo has received renewed attention which has made many communities and different stakeholders to gain interest in the resource. This study which was carried out in the Menoua division, West region of Cameroon between February to July 2021 sought to identify and characterise the actors involved in the bamboo sector, and assess the different strategies that could be employed to develop the bamboo sector. Data were collected using quantitative and qualitative methods in 6 sub-divisions in Menoua division (Dschang, Santchou, Fongo Tongo, Fokoué, Penka Michel and Nkong-Ni). For the selection of study sites, the criterion used was the proximity of households to the area where the bamboo resource is found. Using the simple random sampling method, 53 households were surveyed across the Menoua division. Key informant and expert interviews were also conducted with mayors, traditional chiefs, heads of forestry posts, heads of research institutions/structures and craftsmen involved in the bamboo sector. Using SPHINX software version 5, a survey form was designed. The data collected was coded and analysed using EXCEL 2010 and SPSS. Map data was analysed using ARCGIS version 2.18. Results indicated that there were two main groups of actors: direct actors (collectors, collectors/transporters, producers/collectors, producers/collectors/transporters, collectors/traders) and indirect actors (Municipal Councils, Decentralized Services of the Ministry of Forestry and Wildlife—M

关键词： Bamboo Bamboo Vulgarization Strategic Framework Actors Menoua Division Cameroon

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Assessing Growth Parameters from Culm Cuttings of Bambusa vulgaris at the University of Dschang Botanic Garden, West Region of Cameroon: Implications for the Bamboo Resource Base and Rural Livelihoods

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Open Journal of Forestry 2022年第1期12卷 88-106页

作者： Gilles Ananfack Baurel Atchombou herman T. zanguim Nyong Princely Awazi Steve N. Tassiamba Loic T. Tientcheu Barnabas Neba Nfornkah Rene Kaam Martin N. Tchamba Laboratory of Environmental Geomatics Department of Forestry Faculty of Agronomy and Agricultural Sciences The University of Dschang Dschang Cameroon Department of Forestry and Wildlife Technology College of Technology The University of Bamenda Bambili Cameroon The International Bamboo and Rattan Organization (INBAR) Yaoundé Cameroon

Dwindling supplies of bamboo resources and the increase in the demand for bamboo have led to the need for better propagation techniques. This is the only way to ensure the sustainability of the bamboo resource base and improve livelihoods. Thus, this study was carried out to examine the different growth parameters of culm cuttings of Bambusa vulgaris in propagation beds with a substrate consisting of dark soil, manure (compost) and sand in a ratio of 1:1:1. Data on different growth parameters was collected on a daily basis over a three week period and analyzed using appropriate descriptive and inferential statistics. It was found that the different growth parameters (diameter, height, leaves and sheaths) of culm cuttings of B. vulgaris evolved in like manner in three propagation beds. Descriptive statistics for growth parameters of culm cuttings of B. vulgaris showed little or no differences across three shelter/propagation beds (shelter bed 1, shelter bed 2 and shelter bed 3) with 1.4675 ± 1.6172 cm, 93 ± 112 cm, 22 ± 30 leaves, and 4 ± 6 sheaths being the mean diameter, height, number of leaves and number of sheaths for all three propagation beds, respectively. ANOVA test showed no statistically significant variation (p > 0.05) between growth parameters of culm cuttings of B. vulgaris across the three propagation beds, implying that the different growth parameters were relatively similar. Pearson correlation showed the existence of direct and inverse relationships between the different growth parameters of culm cuttings of bamboo. The existence of these direct and inverse relationships could be attributed to the rapid growth rate of bamboo, the substrate used, and the species of bamboo used (B. vulgaris). The study recommends more large-scale propagation projects of this bamboo species in order to ensure the s

关键词： Bamboo Bambusa vulgaris Growth Parameters Culm Cuttings University of Dschang Botanic Garden Cameroon

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Systematic review and meta-analysis of seroprevalence of human immunodeficiency virus serological markers among pregnant women in Africa, 1984-2020

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World Journal of Critical Care Medicine 2023年第5期12卷 264-285页

作者： Jean Thierry Ebogo-Belobo Sebastien Kenmoe Chris Andre Mbongue Mikangue Serges Tchatchouang Lontuo-Fogang Robertine guy Roussel Takuissu Juliette Laure Ndzie Ondigui Arnol Bowo-Ngandji Raoul Kenfack-Momo Cyprien Kengne-Ndé Donatien Serge Mbaga Elisabeth Zeuko'o Menkem Ginette Irma Kame-Ngasse Jeannette Nina Magoudjou-Pekam Josiane Kenfack-zanguim Seraphine Nkie Esemu Paul Alain Tagnouokam-Ngoupo Lucy Ndip Richard Njouom Center for Research in Health and Priority Pathologies Institute of Medical Research and Medicinal Plants StudiesYaounde 00237Cameroon Department of Microbiology and Parasitology University of BueaBuea 00237Cameroon Department of Microbiology The University of Yaounde IYaounde 00237Cameroon Scientific Direction Centre Pasteur du CamerounYaounde 00237Cameroon Department of Animal Biology University of DschangDschang 00237Cameroon Centre for Food Food Security and Nutrition ResearchInstitute of Medical Research and Medicinal Plants StudiesYaounde 00237Cameroon Department of Biochemistry The University of Yaounde IYaounde 00237Cameroon Epidemiological Surveillance Evaluation and Research UnitNational AIDS Control CommitteeDouala 00237Cameroon Department of Biomedical Sciences University of BueaBuea 00237Cameroon Department of Virology Centre Pasteur du CamerounYaounde 00237Cameroon

BACKGROUND Human immunodeficiency virus(HIV)is a major public health concern,particularly in Africa where HIV rates remain *** women are at an increased risk of acquiring HIV,which has a significant impact on both maternal and child *** To review summarizes HIV seroprevalence among pregnant women in *** also identifies regional and clinical characteristics that contribute to study-specific estimates *** The study included pregnant women from any African country or region,irrespective of their symptoms,and any study design conducted in any *** electronic literature searches,articles published until February 2023 were *** quality of the included studies was *** DerSimonian and Laird random-effects model was applied to determine HIV pooled seroprevalence among pregnant women in *** and sensitivity analyses were conducted to identify potential sources of *** was assessed with Cochran's Q test and I2 statistics,and publication bias was assessed with Egger's *** A total of 248 studies conducted between 1984 and 2020 were included in the quantitative synthesis(meta-analysis).Out of the total studies,146(58.9%)had a low risk of bias and 102(41.1%)had a moderate risk of *** HIV-positive pregnant women died in the included *** overall HIV seroprevalence in pregnant women was estimated to be 9.3%[95%confidence interval(CI):8.3-10.3].The subgroup analysis showed statistically significant heterogeneity across subgroups(P<0.001),with the highest seroprevalence observed in Southern Africa(29.4%,95%CI:26.5-32.4)and the lowest seroprevalence observed in Northern Africa(0.7%,95%CI:0.3-1.3).CONCLUSION The review found that HIV seroprevalence among pregnant women in African countries remains significant,particularly in Southern African *** review can inform the development of targeted public health interventions to address high HIV seroprevalence

关键词： Human immunodeficiency virus Pregnant women Africa Prevalence Review Meta-analysis

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