Ngo Bieng Marie Ange

Ngo Bieng Marie Ange
Cirad - La recherche agronomique pour le développement | CIRAD · Unité Propre de Recherche Biens et Services des Écosystèmes Forestiers Tropicaux: l'Enjeu du Changement Global (BSEF)

About

37
Publications
5,357
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
264
Citations

Publications

Publications (37)
Article
Full-text available
El artículo evalúa la biodiversidad de árboles en un paisajes ganadero en el departamento de Catacamas, Honduras, a través del muestreo de diferentes elementos en el paisaje: bosques naturales, cercas vivas, sistemas agroforestales y árboles dispersos en fincas productivas.
Preprint
Full-text available
Biodiversity decline in the tropics requires the implementation of comprehensive landscape management where agricultural systems are necessarily an integral element of biodiversity conservation. This study evaluates the potential for biodiversity conservation within an intensive livestock-agricultural-forest mosaic landscape in Catacamas, Honduras....
Article
Full-text available
Abstract Stand dynamic rates in Earth's vitally important tropical mountain rain forests are a central component of the response of these forests to global change, but their relationships to environmental gradients are poorly understood. We worked in mature forests on a 440–2810 m asl altitudinal gradient on Costa Rica's Talamanca Cordillera, makin...
Article
Tropical forests play a fundamental role in mitigating climate change through storage of carbon in above- and below- ground biomass. Their mitigation potential is, however, affected by significant greenhouse gas emissions through tropical deforestation or forest degradation. Mitigating degradation caused by conventional logging is therefore an impo...
Article
Sustainable management of secondary forests for timber production offers the opportunity to combine nature-based climate change mitigation with direct improvement of human livelihoods in the tropics, but this dual potential has rarely been explored. We characterized aboveground biomass (AGB) in secondary forests (SF) in Nicaragua and Costa Rica in...
Article
The objective of our work was to evaluate soil quality in different cacao agroforestry systems (AFS) in the Colombian Amazon. We compared soil quality of AFS at the study site with soil quality of two control systems: a pasture and a secondary forest. The study was conducted at the Macagual Amazon Research Center in western Colombian Amazon. We set...
Article
Full-text available
In this study, we measured diurnal patterns of sap flow (Vs) in cacao trees growing in three types of agroforestry systems (AFs) that differ in the incident solar radiation they receive. We modeled the relationship of Vs with several microclimatic characteristics of the AFs using mixed linear models. We characterized microclimatic variables that ma...
Article
Studying spatial and temporal plant disease dynamics helps to understand pathogen dispersal processes and improve disease control recommendations. In this study, three cacao plots devoid of primary inoculum of Phytophthora megakarya (causal agent of cacao black pod rot disease) upon establishment in 2006 were monitored for presence of disease on a...
Chapter
Here we show that spatial tree structure within cacao agroforests influences pest and disease attack intensity of cacao trees. At the plot scale, regular or random spatial organizations of forest trees reduced pest and disease intensity of frosty pod rot in Costa Rica, and mirids in Cameroon. At the individual scale, the number of neighboring cacao...
Article
Full-text available
Aim We sought to determine the relationship of forest composition and alpha diversity (the species diversity of a local assemblage) to altitude, soil, and spatial factors over a 440–2,950 m a.s.l gradient. Location Altitudinal gradient on the Caribbean slope of the Talamanca Cordillera, Costa Rica. Taxon Angiosperm and gymnosperm trees, palms, an...
Article
Full-text available
Aim and background: We present a typology of cacao agroforest systems in Colombian Amazonia. These systems had yet to be described in the literature, especially their potential in terms of biodiversity conservation. The systems studied are located in a post-conflict area, and a deforestation front in Colombian Amazonia. Cacao cropping systems are...
Article
Full-text available
Combining crop plants with other plant species in agro-ecosystems is one way to enhance ecological pest and disease regulation mechanisms. Resource availability and microclimatic variation mechanisms affect processes related to pest and pathogen life cycles. These mechanisms are supported both by empirical research and by epidemiological models, ye...
Article
Full-text available
Vegetation composition and plant spatial structure affect disease intensity through resource and microclimatic variation effects. The aim of this study was to evaluate the independent effect and relative importance of host composition and plant spatial structure variables in explaining disease intensity at the plot scale. For that purpose, frosty p...
Conference Paper
Background/Question/Methods Agroecology involves the optimization of ecological processes in agroecosystems. It has been identified as a sustainable alternative to the negative environmental impact of modern agriculture. A challenge in agricultural research is to design innovative ”agroecological” systems: allowing to maintain an acceptable level...
Article
The importance of the spatial organisation of individuals in explaining species coexistence within a community is widely recognised. However, few analyses of spatial structure have been performed on tropical agroforests.The main objective of this study was to highlight the links between spatial organisation of shade trees on the one hand, and shade...
Article
• Background Growth modelling of complex stands calls for the use of spatially explicit single-tree models. Such models require spatially explicit tree locations as the initial state to run simulations. Given the cost of such data, virtual forest stands, where tree locations are simulated, are generally used as the initial state. • Purpose The purp...
Book
Phenotypic plasticity is defined as the plastic responses of plant phenotypes to the abiotic and biotic environment. Very little is known about the consequences of phenotypic plasticity for plant communities in general, and agroforestry systems in particular. We put in evidence key aspects of plasticity in some temperate agroforestry systems, inclu...
Book
Coffee agroforests in ‘Guinée forestière’ are complex cropping systems, with a multistrata structure and a high specific biodiversity (perennial and annual). They play an important role in local farmers’ incomes, and thus for local development and for biodiversity preservation. Nevertheless, interactions between the different components are complex...
Book
Coffee is frequently cultivated under shade in Mesoamerica. The effects of shade trees on coffee productivity depend on the environmental conditions: mainly temperature, humidity, solar radiation and rainfall patterns. Crop models may be useful to assess current systems and modify their shade management, to improve productivity and provision of env...
Article
Forest research and management require to predict the evolution of forest stands, particularly in term of wood production and quality. This prediction is done by simulation with growth model from an initial state. In terms of growth modelling for heterogeneous forest stands, it seems appropriate to use Individual-Based Models. Such models simulate...
Article
In order to study mixed or uneven forest stands, foresters have modelled the dynamics of each individual tree as a function of its characteristics and local neighbourhood. These spatially-explicit individual-based models can be difficult to use, because the characteristics and location of each tree in the initial state have to be specified before r...
Article
In order to study mixed or uneven forest stands, foresters have modelled the dynamics of each individual tree as a function of its characteristics and local neighbourhood. These spatially-explicit individual-based models can be difficult to use, because the characteristics and location of each tree in the initial state have to be specified before r...
Thesis
La gestion forestière nécessite de pouvoir prédire l'évolution des différentes parcelles, en particulier en terme de production et de qualité du bois. La recherche forestière, et plus particulièrement la dendrométrie fournissent ainsi aux gestionnaires des outils de prédiction adaptés, à l'exemple des modèles de croissance. Les modèles « peuplement...
Article
In recent years there has been growing interest in uneven-aged or mixed forest stands as a result of new demands of society and of changing forestry practices. Unfortunately, due to their complexity, the dynamics of these stands are more difficult to understand than those of pure and even-aged stands. Thus, new research questions have arisen in ter...
Conference Paper
Full-text available
Abstract The recent development,of individual based and spatially explicit models,raises the question ofhow to simulate relevant initial states for these models, and more particularly how to simulate realistic spatial structures. This isespecially true for forest stand modelling. Inthis paper, we first review briefly the main simple steps in the si...

Network

Cited By
    • Centre d'Excellence Africain sur les Changements Climatiques la Biodiversité et l'Agriculture Durable (CEA-CCBAD) de l'Université Félix Houphouët Boigny (Bingerville Côte d'Ivoire)
    • French National Institute for Agricultural Research (Toulouse)
    • Justus-Liebig-Universität Gießen
    • French National Institute for Agriculture, Food, and Environment (INRAE)
    • ETH Zurich

Projects

Projects (2)
Project
To contribute to understanding of forests and their contributions to people in a context of landscapes and societies resilient to climate change and natural disasters.
Project
Master's thesis project on the specific topic of Recruitment and mortality of tree species, with respect to the functional spectrum of conservative and acquisitive forest species.