Filière des produits à usage médicinal issus de Cordyla pinnata, Detarium microcarpum et Detarium senegalense au Sénégal

Abstract The objectives of this study were: 1) to identify and characterize actors involved in products for medicinal use’ value chain of Cordyla pinnata, Detarium microcarpum and Detarium senegalense in Senegal; 2) to analyze the organization of this value chain and the importance of plant parts used; 3) to analyze the commercialization of these products; 4) to identify the strengths, weaknesses, opportunities and threats of the value chain. Snowball sampling was used and allowed to interview, using interviews guides, 13 local healers, 3 harvesters and 17 herbalists. Results showed that actors involved in this value chain collaborated together and benefit from the support of civil society in terms of training and organization. The roots and barks of Cordyla pinnata and Detarium microcarpum were the most widely used while those of Detarium senegalense were poorly commercialized. Barks, roots and leaves were commercialized between 0.11 and 0.29 Euro/100g. Part of the bark was transformed into powder before being marketed among herbalists between 1.05 Euro/100g (for Cordyla pinnata) and 1.52 Euro/100g (Detarium microcarpum). Selling prices were higher in Dakar. Plant parts derived from Cordyla pinnata were mainly used against intestinal parasites while those of Detarium microcarpum and, to a lesser extent, those of Detarium senegalense were used to treat dermatosis. This value chain was faced with weaknesses such as uncontrolled exploitation of the resource and the seasonal scarcity of certain products while long distance from supply sites threatened its good functioning. Key words: products for medicinal use, Cordyla pinnata, Detarium microcarpum, Detarium senegalense, value chain, Senegal.Cette étude avait pour objectifs : 1) d’identifier et de caractériser les acteurs impliqués dans la filière des produits à usage médicinal tirés de Cordyla pinnata, Detarium microcarpum et Detarium senegalense au Sénégal; 2) d’analyser l’organisation de cette filière et l’importance des parties utilisées ; 3) d’analyser la commercialisation de ces produits ; 4) d’identifier les forces, faiblesses, opportunités et menaces de la filière. L’échantillonnage en boule de neige a été utilisé et a permis d’interroger, à l’aide de guides d’entretien 13 tradipraticiens locaux, 3 récolteurs et 17 herboristes. Les résultats ont révélé que les acteurs de cette filière, majoritairement des hommes, entretenaient des relations de coopération et qu’ils bénéficiaient de l’appui de la société civile en termes de formation et d’organisation. Les racines et les écorces de Cordyla pinnata et Detarium microcarpum étaient plus utilisées tandis que celles de Detarium senegalense étaient peu commercialisées. Les écorces, les racines et les feuilles étaient vendues entre 0,11 et 0,29Euro/100g. Une partie des écorces était transformée en poudre avant d’être commercialisée chez les herboristes entre 1,05 Euro/100g (pour Cordyla pinnata) et 1,52 Euro/100g (Detarium microcarpum). Les prix étaient plus élevés à Dakar. Les parties tirées de Cordyla pinnata étaient essentiellement utilisés contre les parasitoses intestinales tandis que celles de Detarium microcarpum et dans une moindre mesure celles de Detarium senegalense servaient à soigner les dermatoses. Les faiblesses de cette filière concernaient essentiellement l’exploitation anarchique de la ressource et la raréfaction saisonnière de certains produits tandis que l’éloignement des sites d’approvisionnement menaçait son bon fonctionnement. Mots clés : produits à usage médicinal, Cordyla pinnata, Detarium microcarpum, Detarium senegalense, filière, Sénégal

Diversité Et Importance Socio-Economique Des Espèces Fruitières Sauvages Comestibles En Zone Kasa (Sud-Ouest Du Sénégal)

Wild fruit species provide local people with subsistence products and cash income. In addition to their food value, different used organs can, eventually, compromise the availability of these resources. This study aims to identify edible woody species in Kasa Zone and to analyze their socioeconomic importance. An ethnobotanical survey was conducted with 82 informants. Data collected were analyzed using Epi Info software and uses of species were classified into six categories. A Factorial Correspondence Analysis (FCA) highlighted species-organ relationships. Frequency of citations, fidelity index, selling price were used to show the socio-economic importance of the species. Results identified 62 edible species belonging to 31 families and 54 genera. These species were dominated by Annonaceae, Apocynaceae and generic diversity was more pronounced among Anacardiaceae. Identified species were mainly used for food (53%), energy (16%), technology (12%) and medicinal purposes (12%). The FCA showed three organ-use groups with a strong correlation between fruit and root on the one hand and leaf, bark and wood on the other. The study also identified 16 commercialized species. The fruit was the main organ consumed and marketed. The highest number of organs commercialized were recorded for Elaeis guineensis (4 organs) and Borassus aethiopium (3). These products, often collected and sold by women and children, came from villages and transited to markets through the "bana bana". Their prices depended on the locality isolation and the production period. These results open up perspectives for better management of the supply and commercialization of these forest resources

Altimetry for the future: Building on 25 years of progress

In 2018 we celebrated 25 years of development of radar altimetry, and the progress achieved by this methodology in the fields of global and coastal oceanography, hydrology, geodesy and cryospheric sciences. Many symbolic major events have celebrated these developments, e.g., in Venice, Italy, the 15th (2006) and 20th (2012) years of progress and more recently, in 2018, in Ponta Delgada, Portugal, 25 Years of Progress in Radar Altimetry. On this latter occasion it was decided to collect contributions of scientists, engineers and managers involved in the worldwide altimetry community to depict the state of altimetry and propose recommendations for the altimetry of the future. This paper summarizes contributions and recommendations that were collected and provides guidance for future mission design, research activities, and sustainable operational radar altimetry data exploitation. Recommendations provided are fundamental for optimizing further scientific and operational advances of oceanographic observations by altimetry, including requirements for spatial and temporal resolution of altimetric measurements, their accuracy and continuity. There are also new challenges and new openings mentioned in the paper that are particularly crucial for observations at higher latitudes, for coastal oceanography, for cryospheric studies and for hydrology. The paper starts with a general introduction followed by a section on Earth System Science including Ocean Dynamics, Sea Level, the Coastal Ocean, Hydrology, the Cryosphere and Polar Oceans and the ‘‘Green” Ocean, extending the frontier from biogeochemistry to marine ecology. Applications are described in a subsequent section, which covers Operational Oceanography, Weather, Hurricane Wave and Wind Forecasting, Climate projection. Instruments’ development and satellite missions’ evolutions are described in a fourth section. A fifth section covers the key observations that altimeters provide and their potential complements, from other Earth observation measurements to in situ data. Section 6 identifies the data and methods and provides some accuracy and resolution requirements for the wet tropospheric correction, the orbit and other geodetic requirements, the Mean Sea Surface, Geoid and Mean Dynamic Topography, Calibration and Validation, data accuracy, data access and handling (including the DUACS system). Section 7 brings a transversal view on scales, integration, artificial intelligence, and capacity building (education and training). Section 8 reviews the programmatic issues followed by a conclusion

Altimetry for the future: building on 25 years of progress

In 2018 we celebrated 25 years of development of radar altimetry, and the progress achieved by this methodology in the fields of global and coastal oceanography, hydrology, geodesy and cryospheric sciences. Many symbolic major events have celebrated these developments, e.g., in Venice, Italy, the 15th (2006) and 20th (2012) years of progress and more recently, in 2018, in Ponta Delgada, Portugal, 25 Years of Progress in Radar Altimetry. On this latter occasion it was decided to collect contributions of scientists, engineers and managers involved in the worldwide altimetry community to depict the state of altimetry and propose recommendations for the altimetry of the future. This paper summarizes contributions and recommendations that were collected and provides guidance for future mission design, research activities, and sustainable operational radar altimetry data exploitation. Recommendations provided are fundamental for optimizing further scientific and operational advances of oceanographic observations by altimetry, including requirements for spatial and temporal resolution of altimetric measurements, their accuracy and continuity. There are also new challenges and new openings mentioned in the paper that are particularly crucial for observations at higher latitudes, for coastal oceanography, for cryospheric studies and for hydrology. The paper starts with a general introduction followed by a section on Earth System Science including Ocean Dynamics, Sea Level, the Coastal Ocean, Hydrology, the Cryosphere and Polar Oceans and the “Green” Ocean, extending the frontier from biogeochemistry to marine ecology. Applications are described in a subsequent section, which covers Operational Oceanography, Weather, Hurricane Wave and Wind Forecasting, Climate projection. Instruments’ development and satellite missions’ evolutions are described in a fourth section. A fifth section covers the key observations that altimeters provide and their potential complements, from other Earth observation measurements to in situ data. Section 6 identifies the data and methods and provides some accuracy and resolution requirements for the wet tropospheric correction, the orbit and other geodetic requirements, the Mean Sea Surface, Geoid and Mean Dynamic Topography, Calibration and Validation, data accuracy, data access and handling (including the DUACS system). Section 7 brings a transversal view on scales, integration, artificial intelligence, and capacity building (education and training). Section 8 reviews the programmatic issues followed by a conclusion

Rôles des mangroves, modes et perspectives de gestion au Delta du Saloum (Sénégal)

This study allowed determining diverse roles of the mangrove in Delta du Saloum. To the ecological plan, the slightest environmental changes are harmful to mangrove (Ndour, 2005 ; Thomas and al., 1997 ; Blasco, 1983). The consequences are their degradation and the loss of the functions of nurseries, housing environment and niche ecological. In the socioeconomic aspects, mangrove exploitation resources make them playing the role of rampart of the livelihood of the coastal populations (Sène, 2007 ; Cormier-Salem, 1999). So, the goods and services which the mangrove procures to population, gets created divergent interests between the various actors ; what makes difficult their management. Among others obstacles, there is their sector-based management which implies at once several state services. This sector-based approach not facilitates harmonization of the measures of preservation. Otherwise, in spite of the existence of several plans of management, there is always no transfer of competence in fishery domain which prevents in a part the actors to play entirely their roles. In these conditions, perspectives of mangroves management should turn around the harmonization of the measures of protection, decision-making by the Ministry of fishery on marine resources, the elaboration of landscaping of classified forests and codes for good behavior in the area. This need also to promote joint management including the neighboring States sharing the same resources (Ndour, 2005)

Rôles des mangroves, modes et perspectives de gestion au Delta du Saloum (Sénégal)

This study allowed determining diverse roles of the mangrove in Delta du Saloum. To the ecological plan, the slightest environmental changes are harmful to mangrove (Ndour, 2005 ; Thomas and al., 1997 ; Blasco, 1983). The consequences are their degradation and the loss of the functions of nurseries, housing environment and niche ecological. In the socioeconomic aspects, mangrove exploitation resources make them playing the role of rampart of the livelihood of the coastal populations (Sène, 2007 ; Cormier-Salem, 1999). So, the goods and services which the mangrove procures to population, gets created divergent interests between the various actors ; what makes difficult their management. Among others obstacles, there is their sector-based management which implies at once several state services. This sector-based approach not facilitates harmonization of the measures of preservation. Otherwise, in spite of the existence of several plans of management, there is always no transfer of competence in fishery domain which prevents in a part the actors to play entirely their roles. In these conditions, perspectives of mangroves management should turn around the harmonization of the measures of protection, decision-making by the Ministry of fishery on marine resources, the elaboration of landscaping of classified forests and codes for good behavior in the area. This need also to promote joint management including the neighboring States sharing the same resources (Ndour, 2005)

Study of the Combretum micranthum G Don Sector (Kinkeliba) in Senegal

Combretum micranthum (kinkeliba) is one of the most used medicinal plants in Senegal. However, its commercialization is poorly studied. The objective of this study is to analyze the commercialization of Combretum micranthum in Senegal. The study was carried out in two main regions of kinkeliba marketing in Senegal: Dakar, where kinkeliba is marketed; and Thies, where kinkeliba is produced and marketed. Structured and unstructured surveys were administered to different categories of stakeholders: herbalists / traditional practitioners, collectors/ suppliers, retailers and consumers. Production sites that supply Dakar include the following: Diass, Sindia, Kiniabour, Pout, Thies Lalane. The main sales points in Dakar are the Thiaroye and Grand Yoff markets. The kinkeliba marketing chain has short channels and women are the main stakeholders. Procurement is done by harvesting in the natural environment and by purchase for herbalists / traditional practitioners. The benefits and added value derived from the marketing of kinkeliba are positive and are increasingly evolving from producers to retailers. The kinkeliba chain, with its constraints and especially its strengths, requires better structuring and to be better known. Keywords: Combretum micranthum, kinkeliba, commercialization, value chain, Senegal

Value chain of products for medicinal use derived from Cordyla pinnata, Detarium microcarpum and Detarium senegalense in Senegal

Cette étude avait pour objectifs: 1) d’identifier et de caractériser les acteurs impliqués dans la filière des produits à usage médicinal tirés de Cordyla pinnata, Detarium microcarpum et Detarium senegalense au Sénégal; 2) d’analyser l’organisation de cette filière et l’importance des parties utilisées; 3) d’analyser la commercialisation de ces produits; 4) d’identifier les forces, faiblesses, opportunités et menaces de la filière. L’échantillonnage en boule de neige a été utilisé et a permis d’interroger, à l’aide de guides d’entretien 13 tradipraticiens locaux, 3 récolteurs et 17 herboristes. Les résultats ont révélé que les acteurs de cette filière, majoritairement des hommes, entretenaient des relations de coopération et qu’ils béné- ficiaient de l’appui de la société civile en termes de formation et d’organisation. Les racines et les écorces de Cordyla pinnata et Detarium microcarpum étaient plus utilisées tandis que celles de Detarium senegalense étaient peu commercialisées. Les écorces, les racines et les feuilles étaient vendues entre 0,108 et 0,290 Euro/100g. Une partie des écorces était transformée en poudre avant d’être commercialisée chez les herboristes entre 1,046 Euro/100g (pour Cordyla pinnata) et 1,524 Euro/100g (Detarium microcarpum). Les prix étaient plus élevés à Dakar. Les parties tirées de Cordyla pinnata étaient essentiellement utilisés contre les parasitoses intestinales tandis que celles de Detarium microcarpum et dans une moindre mesure celles de Detarium senegalense servaient à soigner les dermatoses. Les faiblesses de cette filière concernaient essentiellement l’exploitation anarchique de la ressource et la raréfaction saisonnière de certains produits tandis que l’éloignement des sites d’approvisionnement menaçait son bon fonctionnement.The objectives of this study were: 1) to identify and characterize actors involved in products for medicinal value chain of Cordyla pinnata, Detarium microcarpum and Detarium senegalense in Senegal; 2) to analyze the organization of this value chain and the importance of plant parts used; 3) to analyze the commercialization of these products; 4) to identify the strengths, weaknesses, opportunities and threats of the value chain. Snowball sampling was used and allowed to inter- view, using interviews guides, 13 local healers, 3 harvesters and 17 herbalists. Results showed that actors involved in this value chain collaborated together and benefit from the support of civil society in terms of training and organization. The roots and bark of Cordyla pinnata and Detarium microcarpum were the most widely used while those of Detarium senegalense were poorly commercialized. Bark, roots and leaves were commercialized between 0.108 and 0.290 Euro/100g. Part of the bark was transformed into powder before being marketed among herbalists between 1.046 Euro/100g (for Cordyla pinna- ta) and 1.524 Euro/100g (Detarium microcarpum). Selling prices were higher in Dakar. Plant parts derived from Cordyla pinnata were mainly used against intestinal parasites while those of Detarium microcarpum and, to a lesser extent, those of Detarium senegalense were used to treat dermatosis. This value chain was faced with weaknesses such as uncontrolled exploitation of the resource and the seasonal scarcity of certain products while long distance from supply sites threatened its good functioning

Floristic diversity and structural characteristics of woody savanna vegetation: a case study from Patako Forest (Senegal)

Due to the presence of tree species of high socio-economic importance, many protected areas in the sudanian zone are facing anthropogenic pressure that threatens their stability and resources integrity. This study aimed at providing a better understanding of woody plant composition and structure in Patako Forest in Senegal. Data collection was conducted by stratified random sampling in a total of 251 plots in different vegetation types. The results indicated that Combretum glutinosum, Terminalia macroptera, Cordyla pinnata, Elaeis guineensis, Acacia macrostachya and Khaya senegalensis were the most representative species. The Importance Value Indices (IVI) of these species varied significantly among vegetation types. Species diversity and structural characteristics were higher in gallery forest. The most important Shannon diversity indices was recorded in gallery forest (2.81) while it was medium in both woodland (2.12), tree savanna (1.55) and shrub savanna (1.24). Tree density was dominated by multi-stemmed species. Stem density was significantly higher in gallery forest (536 ± 13 per ha) and woodland (526 ± 12 per ha) than in tree savanna (364 ± 15 per ha) and shrub savanna (309 ± 14 per ha). Forest management should focus on gallery forest to enhance biodiversity conservation and increase the potential of carbon sequestration

Caractérisation des services écosystémiques fournis par Cordyla pinnata dans la périphérie de la Forêt classée de Patako au Sénégal

Les espèces végétales autochtones permettent d’illustrer la diversité de services écosystémiques fournis par les milieux naturels. Cette étude a pour objectif de caractériser les services écosystémiques de Cordyla pinnata, une espèce autochtone typique de la zone soudanienne sénégalaise. Pour atteindre cet objectif, 97 questionnaires ont été administrés à des chefs de ménage dans la périphérie de la Forêt classée de Patako et les données ont été analysées avec des indicateurs ethnobotaniques. L’étude montre que Cordyla pinnata fournit 20 services écosystémiques appartenant à trois catégories, notamment les services d’approvisionnement, les services de régulation et les services culturels. La Valeur d’usage totale (VUt) de l’espèce est de 7,9 et les VU diffèrent en fonction des sites. Son Facteur de Consensus Informateur (FCI) est supérieur à 0,9 dans les trois catégories et ses Niveaux de Fidélité (NF) sont élevés pour la nourriture, la médecine traditionnelle, le bois, l’ombrage, la fertilisation des terres et l’héritage. Ces résultats permettent de dire que Cordyla pinnata a une grande importance dans plusieurs aspects de la vie des populations locales. Sa VU est plus élevée dans les localités éloignées de la Forêt classée de Patako où la couverture végétale naturelle est plus pauvre. Mais la majorité des services écosystémiques que l’espèce fournit sont perçus et appréciés localement, et sont compromis par la dégradation de son peuplement dans la zone. Ainsi, il conviendrait de mieux conscientiser les populations locales sur l’importance socio-économique et écologique de l’espèce afin qu’elles la préservent davantage et la restaurent dans les agro-systèmes.Local plant species allow illustrate the diversity of ecosystem services provided by natural ecosystems. The present study has the objective to characterize ecosystem services provided by Cordyla pinnata, an indigenous species of the sudanian zone of Senegal. To achieve this objective, 97 questionnaires were conducted with the head of households around Patako Classified Forest and data analysis was based on ethnobotanical indicators. This study shows that Cordyla pinnata provides 20 ecosystem services which belong to three categories : provisioning services, regulation services and cultural services. The total Use Value (UVt) of the species is 7.9 and UV differ among sites. Factor of Informant Consensus (FIC) is greater than 0.9 in all three categories and Fidelity Levels (FL) are high for food, traditional medicine, wood, shade, soil fertilization and inheritance. Results show that Cordyla pinnata is a useful species in many aspects of local people’s lives. Its UV is higher in sites distant from Patako Classified Forest were the natural vegetation is less abundant. However the majority of these ecosystem services provided by the species are locally perceived and enjoyed and is compromised by the degradation of its stand population in the area. Thus, it appropriate to make local population more conscious about the socio-economic and ecological importance of the species for them so that they the preserve it better and restore it in agro-systems