The cocoa economy of Ivory Coast started in the eastern part of the country in the 1970s and spread to the central-western and then south-western regions. For nearly a decade, it has been in the West of Ivory Coast with a population increase caused by large waves of migration. This study aims to determine different factors explaining dynamics of the cocoa economy from the East to West of Ivory Coast. The method adopted consisted of processing Landsat images from 1985–2018 and an individual survey of 278 heads of households. The results obtained showed that the development of the cocoa economy led forest cover degradation with a total loss estimated at 60.80%, 46.39%, 20.76% and 51.18% of forest area in the East, Centre-West, South-West and West, respectively. The creation of new cocoa farms in the West of Ivory Coast is governed by non-native people (51.13%) settled between 2010 and 2018. About 41% of these producers come mainly from the Centre-West (25%) and the South-West (16%). In addition, 29% of producers come from the West of Ivory Coast. Despite the abiotic characteristics being considered unfavourable, the west of Ivory Coast is in the process of becoming the country’s new zone of high cocoa production.

Côte d’Ivoire’s rural areas adjacent to the state-owned areas of the southern half of the country, such as classified forests, are experiencing significant migratory flows due to their agricultural potential. The population movements in these rural areas have changed the rural landscape. The general objective of this study was to identify the peasant innovations implemented in these rural areas adjacent to the state’s forest domains in a context of land saturation caused by migratory flows. This objective was elucidated from the case of the classified forest of Haut-Sassandra (CFHS). To achieve this, surveys were conducted in 11 villages on the periphery of the FCHS to determine the profile of planters and the main crops grown. Subsequently, floristic inventories were carried out on farms to analyse the diversity of associated species. Analyses showed that the rural populations of the CFHS are mainly composed of Allochthones (64%). Four innovative production systems were identified: a cashew-based production system, a cocoa-based production system, a coffee-based production system and a coffee- and cocoa-based production system. These farmer innovations based on agroforestry practices make it possible to restore impoverished lands and fight against climatic hazards. Consequently, these local practices deserve to be popularised in areas of strong land pressure as strategies to overcome the shortage of arable land and fluctuating prices of agricultural production.

Les caractéristiques des stomates des feuilles de Ficus benjamina L comme bioindicateurs potentiels de la qualité de l'air dans la ville d'Abidjan 6675 Les caractéristiques des stomates des feuilles de Ficus benjamina L. comme bioindicateurs potentiels de la qualité de l'air dans la ville d'Abidjan (Côte d'Ivoire)

Côte d'Ivoire, like many countries in Africa, has experienced a decade of crises that has not been without consequences for the natural formations in general and protected areas in particular. The objective of this study is to evaluate the floristic diversity and structure of forest fragments Southwest of National Park of Comoé after conflicts. The sampling methodology was to inventory all taxa along 500 meters long and a width of 10 m (5 m either side of the main line) installed in each forest fragment. In addition to the inventory of taxa, we measured the circumference of all trees at least 30 cm with their corresponding pitch. A total of 12 transects were sampled in 12 fragments of forest. Following these inventories, 256 plant species have been identified, the most abundant belong to the families of Rubiaceae and Fabaceae. 23 species have been recognized as having a special status, including Salacia miegei N. Halle and Uvaria tortilis A. Chev. Ex Hutch. & Dalziel are endemic to the Côte d'Ivoire. Nine (9) others species have been identified as species of high commercial value for the quality of their wood. The forest formations are very dense with more than 550 trees / ha. It appears that the fragments contain few large trees. Despite the successive crises, it appears that forest fragments Southwest National Park Comoé still have good potential floristic.Keywords: Comoé National Park, forest fragments, floristic diversity, special status species. IntroductionLes aires protégées possèdent des racines historiques lointaines. Elles ont existé sous plusieurs formes selon les cultures et les traditions des peuples (Allin, 1990 ;Runte, 1997). Elles entretiennent les processus écologiques vitaux. Malheureusement les aires protégées sont sujettes de plus en plus à des pressions anthropiques. Dans plusieurs régions, ces pressions sur les écosystèmes en général et les aires protégées en particulier continuent de mettre en mal la biodiversité, accentuant la raréfaction voire la disparition de plusieurs ressources naturelles. Ces pressions sont d'autant plus acerbes qu'elles sont suscitées par des crises socio-politiques débouchant sur des conflits armés. En Afrique, les problèmes d'instabilité politique et les conflits entraînent une destruction de ces zones qui sont envahies par des populations fuyant les conflits (Mengue-Medou, 2002). Durant la guerre au Rwanda, le parc national Virunga est devenu un refuge pour des milliers de réfugiés qui fuyaient la guerre (Mengue-Medou., 2002).

Côte d’Ivoire, like many countries in Africa, has experienced a decade of crises that has not been without consequences for the natural formations in general and protected areas in particular. The objective of this study is to evaluate the floristic diversity and structure of forest fragments Southwest of National Park of Comoé after conflicts. The sampling methodology was to inventory all taxa along 500 meters long and a width of 10 m (5 m either side of the main line) installed in each forest fragment. In addition to the inventory of taxa, we measured the circumference of all trees at least 30 cm with their corresponding pitch. A total of 12 transects were sampled in 12 fragments of forest. Following these inventories, 256 plant species have been identified, the most abundant belong to the families of Rubiaceae and Fabaceae. 23 species have been recognized as having a special status, including Salacia miegei N. Halle and Uvaria tortilis A. Chev. Ex Hutch. & Dalziel are endemic to the Côte d’Ivoire. Nine (9) others species have been identified as species of high commercial value for the quality of their wood. The forest formations are very dense with more than 550 trees / ha. It appears that the fragments contain few large trees. Despite the successive crises, it appears that forest fragments Southwest National Park Comoé still have good potential floristic.