Gerard Nounagnon Gouwakinnou

Gerard Nounagnon Gouwakinnou
University of Parakou | UP · Faculty of Agronomy

Doctor of Philosophy

About

50
Publications
24,289
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490
Citations
Additional affiliations
January 2007 - October 2014
University of Abomey-Calavi
Position
  • Research Associate

Publications

Publications (50)
Article
Of the eight Cantharellus species known from Benin, seven have been encountered under similar macroecological conditions. The present work attempts to generate a more complete distribution of these seven species. Forty-eight occurrences of the target species and four explanatory variables including three bioclimatic variables and a land cover varia...
Article
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Afzelia africana (Fabaceae) is one of the multipurpose plants native in tropical Africa, mainly used for its medicinal properties, fodder value and the quality of its wood. However, the species is highly threatened due to several factors including regeneration problems. This study aimed to assess the effect of ectomycorrhizal inoculation, organic a...
Article
Full-text available
Land use and land cover change (LULCC) is one of the problems that the world has been facing for the last few decades despite political attention. Frequently, this change is addressed by the remote sensing and mapping approach, while it only half solves the problem as LULCC depends on the region and the prevailing socio-economic activities. In this...
Article
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Understanding the effect of seed size and maturity level on their germination capacity is essential to propagate a species effectively. This study assessed variations in seed germination of the indigenous fruit tree species Lannea microcarpa in relation to seed maturity levels and morphotype traits. Three fruit maturity levels (green, green-red, an...
Article
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Le changement d'affectation des terres est l'une des causes majeures de la dégradation et de la déforestation dans le monde. Au Bénin, les écosystèmes sont largement dépendants des activités anthropiques. Cette étude vise à analyser la perception de l'état des écosystèmes forestiers ainsi que des moteurs d'affectation des terres de déforestation et...
Article
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BACKGROUND The southern armyworm (SAW) Spodoptera eridania (Stoll) (Lepidoptera: Noctuidae) is native to tropical Americas where the pest can feed on more than hundred plant species. SAW was recently detected in West and Central Africa, feeding on various crops including cassava, cotton, amaranth and tomato. The current work was carried out to pred...
Article
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The conservation of wildlife populations requires regular studies for effective monitoring. However, although necessary, these studies are difficult to implement, particularly in the developing countries where the lack of financial resources and appropriate material are felt. Nowadays, the use of drones has grown steadily, opening up new avenues fo...
Poster
Full-text available
Les forêts hébergent plus de 80% de la biodiversité terrestre. Ainsi la protection de la biodiversité passe inéluctablement par la préservation de ces écosystèmes forestiers. Cependant, le constat général révèle que ces forêts subissent d’énormes pressions anthropiques qui impactent négativement sur la diversité biologique qu’elles renferment. Cett...
Article
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Le Nord du Bénin abrite 92,5 % de la couverture forestière nationale, principalement constituée des réserves de faune et de forêts classées, destinées à la conservation de la biodiversité. Ces zones du domaine classé, pourtant dotées pour la plupart de plans d’aménagement et d’un système de surveillance qui devraient limiter la dégradation du milie...
Article
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The literature review aims to elucidate land-use drivers in relation to ecosystem services and biodiversity conservation. Degradation and deforestation are linked to direct and indirect drivers, which amplify biodiversity loss and decrease the supply of ecosystem services. However, strategies including mechanisms to reduce greenhouse gas emissions...
Article
In Benin, rural populations depend heavily on woody plant resources to meet their daily needs. With a rapidly growing population, the woody species of the Guineo-Congolese zone of Benin are subjected to strong harvesting pressure. It is in this context that this study was conducted in this area to assess the vulnerability of woody species used in t...
Article
Full-text available
Forests have been undergoing diverse threats due to human activities and these may affect their role as Ecosystem Services (ES) providers. Therefore, it becomes crucial to undertake some analysis of the current socioeconomic context of ES offerings to provide valuable information for the decision-making process and policy regarding sustainable fore...
Article
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L'évaluation et le suivi des espèces forestières constituent une source fondamentale d'informations pour la mise en place des stratégies de conservation efficaces et adaptées de ces espèces. La présente étude a pour objectif de déterminer la caractérisation structurale des peuplements naturels de D. senegalense J.F. Gmel. au Bénin. Quarante-huit pl...
Poster
Full-text available
This study was carried out around two forest reserves (Alibori-Supérieur and Ouénou-Bénou) in Northern Benin. It aimed to highlight the knowledge of the surrounding communities and their perceptions about the importance of the ecosystem services provided by these forest reserves as well as the factors that influence their knowledge and perceptions.
Poster
Full-text available
This work proposes a strategy to identify areas for long term conservation and restoration, taking into account potential climate change effects, for native tree species at country scale.
Poster
Full-text available
This work provides guidance to improve patrol allocation using ranger collected data about incidents by describing the extent of illegal activities, (ii) identifying zones of high pressure for each class of illegal activities, and (iii) evaluating seasonal variation of illegal activities.
Article
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Background: Ecosystems provide humanity with goods and services known as ecosystem services. The value of these services represents a basis for political decision-making. To be sure that these decisions are made on a valid basis, policymakers require an understanding of the biophysical processes involved. This study was carried out around two fore...
Conference Paper
Full-text available
L'anthropisation des écosystèmes forestiers est devenue un problème environnemental majeur qui impacte la biodiversité dans le monde. Répondre à une telle problématique nécessite le suivi de l'utilisation des terres. Au Bénin, les forêts classées et principalement celle de Ouénou-Bénou subissent de très fortes pressions anthropiques marquées par un...
Article
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This study analyses the spatio-temporal trends of illegal activities in W Biosphere Reserve of Benin in order to provide guidance for planning the patrol system. We used ranger-collected data on illegal activities in the reserve from 2012 to 2015. Illegal grazing is the most common illegal activity observed in the reserve (1,137 incidents), followe...
Conference Paper
Full-text available
Les écosystèmes forestiers jouent un rôle important dans l’équilibre global de carbone. Ils représentent l’un des plus importants puits de carbone et constituent un élément déterminant dans l’atténuation des changements climatiques. Dans cette étude, l’effet de la dynamique d’occupation des terres sur le flux de carbone des forêts classées de l’Ali...
Article
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Understanding the socio-cultural importance of indigenous fruit trees (IFT) and its determining factors is a prerequisite for developing their value and making management decisions. This study documented traditional knowledge (TK) and the cultural importance (CI) of Lannea microcarpa, a neglected and underused indigenous fruit tree found in Benin’s...
Article
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Understanding the utilization of plant is fundamental for efficient conservation of species. The present study aimed at assessing the quatitative ethnobotany of Lophira lanceolata Tiegh. ex Keay (Ochnaceae) utilization in Benin. A number of 1261 persons were randomly selected and interviewed using semi-structured questionnaires. Principal Componen...
Article
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Understanding population structure is crucial for the efficiency of management programs. The present study aimed at assessing the typology and structure of the multipurpose tree Lophira lanceolata (Ochnaceae) in Benin. We established seventy squared plots of 50mx50m size and measured on each individual the diameter at breast height (DBH), total hei...
Article
Full-text available
L’objectif de cette étude est d’évaluer au Bénin l’efficacité du réseau des aires protégées dans la conservation des habi- tats favorables et prioritaires de certaines espèces ligneuses d’importance socio-éco- nomique. Il s’agit de Afzelia africana, Anogeissus leiocarpa, Burkea africana, Daniellia oliveri, Detarium microcarpum, Prosopis africana et...
Article
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Synsepalum dulcificum (Schumach. & Thonn. Daniell) est un arbuste originaire de l’Afrique de l’Ouest, inscrit sur la liste des espèces vulnérables de l’UICN. Au Bénin, son importance pour les populations locales reste peu documentée. L’étude avait pour objectif d’évaluer les connaissances endogènes, la valeur d’usage et l’importance économique de l...
Article
Full-text available
Synsepalum dulcificum (Schumach. & Thonn. Daniell) is a West African shrub which is listed as vulnerable by the IUCN. Its importance for local people in Benin has been little documented. This study takes up this issue and was carried out to assess local knowledge, use value and the economic importance of the species for local people. Ethnobotanical...
Article
Lannea microcarpa, an Anacardiaceae species associated to croplands in West Africa is a multipurpose tree used in traditional medicine, human and animal feeding in Sudanian zone of Bénin. This study aimed at evaluating its fruits and pulp yield. Fruit and pulp production and dendrometric variables were collected on 21 and 27 trees respectively in d...
Article
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Parkia biglobosa (the locust bean tree) is one of agroforestry species of major socio-economic importance not only in Benin but in the whole West African region. However, its conservation and domestication for the diversification of agricultural production depends on its ability to adapt to climate change. Thus 492 points of occurrence combined wit...
Article
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The present study aims to: (i) check its abundance and distribution Sterculia setigera Del. in Togo according to biophysical factors and (ii) forecast its potential suitable habitat. S. setigera trees (DBH ≥ 10 cm) were numbered and human activities were recorded within 518 plots. Geographic Information System offers applications for evaluation of...
Article
Full-text available
The aim of this study was to assess the effectiveness of protected areas in Benin for the conservation of favourable and priority habitats for the following tree species of socio-economic importance: Afzelia africana, Anogeissus leiocarpa, Burkea africana, Daniellia oliveri, Detarium microcarpum, Prosopis africana and Khaya senegalensis. We combine...
Article
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Mode de reproduction et phénologie florale d'une espèce dioïque, Sclerocarya birrea (Anacardiaceae), en relation avec l'utilisation des terres Abstract: Understanding reproductive biology of plant species is fundamental to plant breeding and improvement program. Knowing plant population ecology is also an essential prerequisite for sound conservati...
Article
Full-text available
Invasive plant species are today among the biggest threats to integrity of many ecosystems including that of the protected areas. Climate change may exacerbate the negative effects of invasive plant species. Here, we used the Maximum Entropy model to project habitat suitability for Lantana camara L., an invasive plant species under current and futu...
Article
Full-text available
Invasive plant species and climate change are among the biggest threats to the ecological integrity of many ecosystems, including those of protected areas. Effective management of invasive plants requires information regarding their spatial distributions. Using maximum entropy, we modeled habitat suitability for an invasive plant species Chromolaen...
Article
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Abstract For decades, plant species, particularly those used as non-tree forest products (NTFPs), have been known to play an important role in the livelihood of local populations, particularly in rural Africa. The present study investigated the uses of various parts of Moringa oleifera Lam. in southern Benin. It aimed at capturing indigenous kn...
Article
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La présente étude a pour objectif principal d’évaluer l’influence des changements climatiques sur la distribution spatiale de Chrysophyllum albidum, une espèce prioritaire et menacée au Bénin. La modélisation de la distribution géographique actuelle et future de l’espèce est basée sur le principe d’entropie maximale (MaxEnt). Elle a été faite à par...
Article
Full-text available
La présente étude a pour objectif principal d’évaluer l’influence des changements climatiques sur la distribution spatiale de Chrysophyllum albidum, une espèce prioritaire et menacée au Bénin. La modélisation de la distribution géographique actuelle et future de l’espèce est basée sur le principe d’entropie maximale (MaxEnt). Elle a été faite à pa...
Article
Full-text available
Climate change may limit integration of Underutilized Agroforestry Fruits Trees (UAFT) into formal cropping systems as a strategy to increase rural household income in Africa. The present study analyzed the potential impact of climate change on the geographical distribution of suitable areas for tamarind (Tamarindus indica L.), an economically impo...
Article
Full-text available
Species prioritization is a crucial step in any development of conservation strategy, especially for crop wild relatives (CWR), since financial resources are generally limited. This study aimed at: assessing the biodiversity of crop wild relatives in Benin and identifying priority species for active conservation. Data were collected through literat...
Article
Full-text available
Medicinal plants play an important role in human livelihoods. However, the harvest of different organs may be destructive. Sarcocephalus latifolius is a species whose roots are harvested for medicinal purposes. This study was carried out to assess the root characteristics, biomass yield and morphological variations within different habitats of sout...
Article
The domestication of indigenous fruits through agroforestry is seen as one of the important issues in the transformation in the way in which land is used within rural areas. A study of the variation in fruit traits is also important as it is a prerequisite for cultivar development in the domestication process. Following an aridity gradient, phenoty...
Article
Full-text available
In Sub-Saharan Africa, indigenous fruit trees play vital roles in nutrition and food security particularly, in food shortage times. Sclerocarya birrea subsp. birrea, an indigenous dioecious fruit tree is such a resource with strong multipurpose use characteristics in semi-arid zones of West Africa. We assessed sex ratio, spatial distribution among...
Article
Full-text available
Growing interest is on food tree species in general, and particularly indigenous fruit tree species in developing countries since they are inherent to most tropical landscapes and serve the dual function of local livelihood support and biodiversity conservation. It is therefore relevant to assess the level of integration of these species in local c...
Article
Full-text available
Le présent travail réalisé dans la forêt classée de l’ouémé supérieur N’dali (OSN) au Nord du Bénin a permis de montrer le potentiel des forêts classées en ressources alimentaires et médicinales envue d’une meilleur prise en compte dans les plans d’aménagemnt forestier. La méthode utilisée a consisté à faire des entretiens semi-structurés avec les...
Article
Full-text available
The importance of indigenous fruit tree species for people living around protected areas is widely acknowledged. There is then a need to assess their conservation status in the current context of increasing human population and pressure around reserves. We investigated the population structure of Sclerocarya birrea, a multiple-use tree species in t...

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Projects (4)
Archived project
Sustainable Use of Natural Vegetation in West Africa RESULTS IN BRIEF SUN, gathered local and international expertise to create a framework for vegetation management in west Africa. Improved interaction between scientists and stakeholders promises to prevent further deterioration of valuable ecosystems. Anne Mette Lykke The natural vegetation of semi-arid west Africa is of immense importance to local ecosystems as well as the livelihood of the local population. Unfortunately, poor management and unsustainable use is bringing about rapid deterioration of the vegetation. To reverse this worrying trend of destruction of a crucially important resource, a major EU-funded project was set up involving institutions from across Europe and west Africa. The 'Tools for management and sustainable use of natural vegetation in West Africa' (SUN) project aimed to bridge the gap between global initiatives, scientific information and the realities of life in Africa where practical solutions are required. SUN aimed to develop new management tools and solid management strategy to improve sustainable use of natural vegetation. The scientists combined vegetation dynamics and causal factors as well as economic instruments and policies to come up with a recipe for sustainable economic growth. To study human impact on phytodiversity, models were constructed using data from maps of vegetation from land use and protected areas. Overall, the scientists worked to understand vegetation dynamics and the factors that bring this about to identify and protect vulnerable areas and habitats. The scientists derived maps that show the changes in vegetation from 1982 to 2008 from indices subject to evaluation. Growing season peak time, greenness, length of season and shape of the phenological profile were used to correlate plant changes with rainfall and temperature patterns. A comprehensive database at http://www.westafricanvegetation.org/ houses the phytosociological and tree (dendrometric) data as well as lists of flora. Adapted to offline and therefore field use where the Internet may be slow, the vegetation data network allows upload of data sets for registered users. For users, the SUN map server facilitates the use of spatial information in SUN areas in west Africa to input into geographic information systems (GIS) for further processing. The SUN countries folder contains a vast range of data – from cities and villages to vegetation, geology and soils, as well as administrative boundaries. SUN has developed a major information platform for sustainable vegetation management in west Africa. The achievements of the SUN project will be fortified by data input from other projects. One key example is that the SUN map server will be updated regularly with data collected from the follow-on Seventh Framework Programme (FP7) initiative 'Understanding and combating desertification to mitigate its impact on ecosystem services' (Undesert). MORE DETAILED RESULTS Workpackage 1. Maps of vegetation patterns and land use units have been prepared for the project core areas. Extensive vegetation inventories from land use areas and protected areas have been conducted and data are stored in a vegetation database (WP4) and used for modelling of phytodiversity patterns in relation to human impact. Population dynamics of several highly valued species show declining tendencies in land use areas compared to protected areas. An improved understanding of vegetation dynamics and their causal factors will be used to identify and protect vulnerable areas and habitats (WP5). Workpackage 2. Five indices that measure changes in phenology have been developed and evaluated to verify that these indices measure; 1) Changes in the peakedness of the growing season, 2) Changes in the average annual greenness, 3) Shifts in the time of the peak of the season, 4) Changes in the length of the season and 5) Changes in the shape of the phenological profile. These indices have been used to derive maps depicting the changes in phenology that have taken place over the period of the time series used (1982 – 2008) and to analyse the correlations between these changes and changes in the key climate parameters of precipitation and temperature. Changes in vegetation phenology are significantly correlated with changes in rainfall over much of Africa and, occasionally, with changes in temperature. Workpackage 3. Local preferences and needs in relation to vegetation use have been identified and analysed within all the core areas. Economic instruments, such as subsidies, taxation, quotas or property right institutions, have been identified and analysed according to political feasibility as tools for improved management. Cultural and socio-economic impediments to sustainable use of the vegetation are also identified and ways to redress them are explored. Workpackage 4. An online vegetation database has been developed, which allows entry of all major plot types and maximises user acceptance by a flexible access rights approach. The online database concept has the advantage of common standards, facilitated exchange, good visibility of available data and high data security. The synchronization feature with local databases makes it possible to use our database directly in the field and under slow internet conditions. the database has a digitization record of 360028 single observations and 10743 plots. Workpackage 5. Indicators of sustainable use were analysed and identified at different scales (landscape, habitat, species). For identification of vulnerable habitats and species, the Climate Change Severity Index was derived, and the population pressure on the core areas was assessed. Vegetation data were prepared for comparison of land use and protected areas, and data on highly valued species in relation to the nearest settlements were used to identify the use impact on the species. A list of indicator species is in preparation. Workpackage 6. Biophysic data (vegetation, species, landcover/landuse, ecoregions, soils, geology, climate, rivers, watersheds, slope, elevation, satellite images) and socioeconomic data (population density, villages, administrative boundaries, languages, ethnies, borders, protected sites) for the core areas in West-Africa have been gathered, compiled and processed and are available in six File Geodatabases (ESRI ArcGIS). The Map Server has been updated to GeoMoose 2.0. Workpackage 7. A participatory management plan is being prepared for each core area on the basis of vegetation, satellite and socio-economic data. Management of natural resources is being improved by increasing local populations’ awareness of new possibilities for sustainable use of forest resources and by integrating local knowledge in the management plans. The management plans are being prepared in close collaboration between researchers and local communities. Workpackage 8. Restoration activities are carried out in different ecological sites of Benin, Burkina Faso and Niger. A total of 10 ha were reforested using low-cost budget (traditional) techniques and deep ploughing. In total, 2500 saplings of value species were planted. In the Sahelian conditions, Acacia senegal and Faidherbia albida are the best species, and in the Sudanian zones, Combretum micranthum, Jatropha curcas, Bauhinia rufescens and Faidherbia albida are able to grow on degraded soils. The best low-budget techniques are half-moon, zaï and stone walls. More expensive techniques like deep ploughing present more effect on soil restoration and biodiversity conservation. Workpackage 9. Dissemination is an important part of all research activities, and all 20 Ph. D. students will focus on disseminating research results. The dissemination is carried out on various levels: information to international institutions, local governments, natural resource management organisations, NGOs and local communities. The scientific results are published in international journals and in brochures in a simplified form. Presently, 29 scientific publications are published in international reviews and more are on the way. PARTNERS Aarhus University, Denmark (coordinator) Danish Institute of Agricultural Sciences, Denmark University of Cheikh Anta Diop of Dakar, Senegal Johan Wolfgang Goethe University, Germany Senckenberg Research Institute, Germany University of Ouagadougou, Burkina FASO University of Bobo Dioulasso, Burkina Faso University of Abomey-Calavi of Cotonou, Benin University of Abdou Moumouni of Niamey, Niger FUNDING EU-FP6 INCO-dev PROJECT PAGE https://cordis.europa.eu/project/rcn/81309_en.html
Archived project
(1) Analyse land use dynamics based on SPOT imageries (2) Identify main land degradation driving factors in the framework of REDD+ (3) Build capacity in GIS and Remote Sensing for effective land use change monitoring