7 research outputs found
DiversitĂ© floristique, Croissance et QualitĂ© du Bois de Cedrela odorata L. (Meliaceae) et Gmelina arborea Roxb (Verbenaceae) dans DiffĂ©rents SystĂšmes de Reboisement de la ForĂȘt ClassĂ©e de la Besso (Sud-Est CĂŽte dâIvoire)
La couverture forestiĂšre de la CĂŽte dâIvoire estimĂ©e Ă environ 16 millions dâhectares dans les annĂ©es 1900 a connu une importante rĂ©duction. En effet, elle est estimĂ©e aujourdâhui Ă moins de 3 millions dâhectares. Cette rĂ©duction est lâeffet conjuguĂ© de lâurbanisation galopante, de lâagriculture et de lâexploitation des massifs forestiers en bois dâĆuvre. Cette diminution a conduit Ă un appauvrissement des forĂȘts en essences commercialisables. La prĂ©sente Ă©tude, rĂ©alisĂ©e dans la forĂȘt classĂ©e de la Besso sâinscrit dans une vision dâamĂ©lioration de la productivitĂ© des plantations forestiĂšres en vue de pallier au manque de ressources naturelles pour lâapprovisionnement des industries du bois. Elle vise Ă identifier un modĂšle de reboisement qui offre une hĂ©tĂ©rogĂ©nĂ©itĂ© spĂ©cifique importante tout en favorisant une meilleure croissance et qualitĂ© de bois. Les espĂšces des plantations utilisĂ©es sont Cedrela odorata L. (Meliaceae) et Gmelina arborea Roxb (Verbenaceae). Les travaux effectuĂ©s ont concernĂ© deux types de reboisement dans la forĂȘt classĂ©e de la Besso Ă savoir, le reboisement de type plantation pure et le reboisement de type agroforĂȘt (Ă base de cafĂ©ier ou de cacaoyer). Plusieurs paramĂštres (quantitatifs et qualitatifs) ont Ă©tĂ© Ă©valuĂ©s suivant les types dâessais. Il en ressort que le reboisement dâagroforĂȘt de type Cedrela odorata en association avec le cafĂ©ier est le milieu le plus hĂ©tĂ©rogĂšne avec un indice de Shannon de 3,472 et une valeur dâĂ©quitabilitĂ© de 0,935. Cependant, Gmelina arborea en agroforĂȘt avec le cacaoyer prĂ©sente une bonne croissance annuelle (0,04 m). LâagroforĂȘt de type Gmelina arborea associĂ©e au cacaoyer a fourni les meilleures valeures de cylindricitĂ© et rectitude.
The forest cover of CĂŽte d'Ivoire estimated at around 16 million hectares in the 1900s has undergone a significant reduction. Indeed, it is estimated today at under three million hectares. This reduction is the combined effect a high rate of urbanization, agriculture and logging industry. This reduction has led to a depletion of the forests in marketable species. This study on the Besso classified forest is part of a vision to improve the productivity of forest plantations in order to compensate for the lack of natural resources to supply the wood industries. It aims to identify a reforestation model that offers significant specific heterogeneity while promoting better growth and wood quality. The plantation species used are Cedrela odorata L. (Meliaceae) and Gmelina arborea Roxb (Verbenaceae). Two types of reforestations in the Besso classified forest, were carried out namely, pure reforestation plantation and agroforest (coffee and cocoa based). Several parameters (quantitative and qualitative) were evaluated according to the types of the trial. The results show that the reforestation of Cedrela odorata-coffee agroforest is the most heterogeneous environment with a Shannon index of 3.472 and an equitability value of 0.935. However, Gmelina arborea-cocoa agroforest has the best annual growth rate (0.04 m). The qualitative parameters (cylindricity and straightness) are better in the Gmelina arborea-cocoa agroforest
DiversitĂ© floristique, Croissance et QualitĂ© du Bois de Cedrela odorata L. (Meliaceae) et Gmelina arborea Roxb (Verbenaceae) dans DiffĂ©rents SystĂšmes de Reboisement de la ForĂȘt ClassĂ©e de la Besso (Sud-Est CĂŽte dâIvoire)
La couverture forestiĂšre de la CĂŽte dâIvoire estimĂ©e Ă environ 16 millions dâhectares dans les annĂ©es 1900 a connu une importante rĂ©duction. En effet, elle est estimĂ©e aujourdâhui Ă moins de 3 millions dâhectares. Cette rĂ©duction est lâeffet conjuguĂ© de lâurbanisation galopante, de lâagriculture et de lâexploitation des massifs forestiers en bois dâĆuvre. Cette diminution a conduit Ă un appauvrissement des forĂȘts en essences commercialisables. La prĂ©sente Ă©tude, rĂ©alisĂ©e dans la forĂȘt classĂ©e de la Besso sâinscrit dans une vision dâamĂ©lioration de la productivitĂ© des plantations forestiĂšres en vue de pallier au manque de ressources naturelles pour lâapprovisionnement des industries du bois. Elle vise Ă identifier un modĂšle de reboisement qui offre une hĂ©tĂ©rogĂ©nĂ©itĂ© spĂ©cifique importante tout en favorisant une meilleure croissance et qualitĂ© de bois. Les espĂšces des plantations utilisĂ©es sont Cedrela odorata L. (Meliaceae) et Gmelina arborea Roxb (Verbenaceae). Les travaux effectuĂ©s ont concernĂ© deux types de reboisement dans la forĂȘt classĂ©e de la Besso Ă savoir, le reboisement de type plantation pure et le reboisement de type agroforĂȘt (Ă base de cafĂ©ier ou de cacaoyer). Plusieurs paramĂštres (quantitatifs et qualitatifs) ont Ă©tĂ© Ă©valuĂ©s suivant les types dâessais. Il en ressort que le reboisement dâagroforĂȘt de type Cedrela odorata en association avec le cafĂ©ier est le milieu le plus hĂ©tĂ©rogĂšne avec un indice de Shannon de 3,472 et une valeur dâĂ©quitabilitĂ© de 0,935. Cependant, Gmelina arborea en agroforĂȘt avec le cacaoyer prĂ©sente une bonne croissance annuelle (0,04 m). LâagroforĂȘt de type Gmelina arborea associĂ©e au cacaoyer a fourni les meilleures valeures de cylindricitĂ© et rectitude.
The forest cover of CĂŽte d'Ivoire estimated at around 16 million hectares in the 1900s has undergone a significant reduction. Indeed, it is estimated today at under three million hectares. This reduction is the combined effect a high rate of urbanization, agriculture and logging industry. This reduction has led to a depletion of the forests in marketable species. This study on the Besso classified forest is part of a vision to improve the productivity of forest plantations in order to compensate for the lack of natural resources to supply the wood industries. It aims to identify a reforestation model that offers significant specific heterogeneity while promoting better growth and wood quality. The plantation species used are Cedrela odorata L. (Meliaceae) and Gmelina arborea Roxb (Verbenaceae). Two types of reforestations in the Besso classified forest, were carried out namely, pure reforestation plantation and agroforest (coffee and cocoa based). Several parameters (quantitative and qualitative) were evaluated according to the types of the trial. The results show that the reforestation of Cedrela odorata-coffee agroforest is the most heterogeneous environment with a Shannon index of 3.472 and an equitability value of 0.935. However, Gmelina arborea-cocoa agroforest has the best annual growth rate (0.04 m). The qualitative parameters (cylindricity and straightness) are better in the Gmelina arborea-cocoa agroforest
Dynamique Spatio-Temporelle et IntĂ©rĂȘt pour la Conservation de la ForĂȘt ClassĂ©e de Goin-DĂ©bĂ©, une Aire ProtĂ©gĂ©e MenacĂ©e de Disparition Ă lâOuest de la CĂŽte dâIvoire
La forĂȘt classĂ©e de Goin-DĂ©bĂ© considĂ©rĂ©e comme zone dâimportance pour la biodiversitĂ©, est depuis la crise post-Ă©lectorale, lâobjet dâexploitations agricoles et dâinfiltrations par des paysans mettant ainsi en pĂ©ril son statut de refuge de la biodiversitĂ©. Ainsi, cette Ă©tude vise Ă©valuer lâĂ©tat de conservation de la vĂ©gĂ©tation et de la flore de cette forĂȘt. Lâexploitation des images satellitaires couplĂ©e aux analyses des donnĂ©es dâinventaire floristique rĂ©vĂšlent des dynamiques diamĂ©tralement opposĂ©es entre les pĂ©riodes 1988 Ă 1998 et 1998 Ă 2020 dans la vĂ©gĂ©tation. La premiĂšre pĂ©riode a Ă©tĂ© marquĂ©e par un gain considĂ©rable en termes de superficie des jachĂšres du sud-ouest au nord-ouest de la forĂȘt classĂ©e. Alors que la seconde a vu une rĂ©gression significative des surfaces des formations vĂ©gĂ©tales au profit des exploitations cacaoyĂšres. Les relevĂ©s floristiques ont permis dâinventorier 220 espĂšces appartenant Ă 176 genres rĂ©partis en 63 familles. Cette flore comporte 15 espĂšces Ă statut particulier selon la liste rouge de lâUICN (2020, 2021 & 2022) et 22 espĂšces endĂ©miques du bloc forestier de la Haute GuinĂ©e (GCW), entre autres Ă©lĂ©ments qui confĂšrent Ă cette forĂȘt un intĂ©rĂȘt particulier pour la conservation.
Since the post-electoral crisis, the Goin-Débé classified forest, considered as an area of importance for biodiversity, has been subject to agricultural exploitation and infiltration by peasants, thus jeopardizing its status as a biodiversity refuge. The aim of this study is to assess the state of conservation of the forest's vegetation and flora. Satellite images and floristic inventory data reveal diametrically opposed vegetation dynamics between the periods 1988 to 1998 and 1998 to 2020. The first period was marked by a considerable gain in fallow area from the south-west to the north-west of the classified forest. The second period, on the other hand, saw a significant decline in the area of plant formations in favor of cocoa farms. Floristic surveys have identified 220 species belonging to 176 genera divided into 63 families. This flora includes 15 species with special status according to the IUCN Red List (2020, 2021 & 2022) and 22 species endemic to the Upper Guinea Forest Block (GCW), among other elements that give this forest a particular interest for conservation
Dynamique Spatio-Temporelle et IntĂ©rĂȘt Pour la Conservation de la ForĂȘt ClassĂ©e de Goin-DĂ©bĂ©, Une Aire ProtĂ©gĂ©e MenacĂ©e de Disparition Ă lâOuest de la CĂŽte dâIvoire
La forĂȘt classĂ©e de Goin-DĂ©bĂ© considĂ©rĂ©e comme zone dâimportance pour la biodiversitĂ©, est depuis la crise post-Ă©lectorale, lâobjet dâexploitations agricoles et dâinfiltrations par des paysans, mettant ainsi en pĂ©ril son statut de refuge de la biodiversitĂ©. Ainsi, cette Ă©tude vise Ă Ă©valuer lâĂ©tat de conservation de la vĂ©gĂ©tation et de la flore de cette forĂȘt. Pour ce faire, une Ă©tude diachronique a dâabord Ă©tĂ© effectuĂ©e Ă partir des images satellitaires Landsat TM des annĂ©es 1988 et 1998 et des images Landsat OLI/TIRS de lâannĂ©e 2020. Ensuite, un inventaire floristique a Ă©tĂ© effectuĂ© dans les diffĂ©rentes formations vĂ©gĂ©tales de la forĂȘt classĂ©e. Lâexploitation des images satellitaires couplĂ©e aux analyses des donnĂ©es dâinventaire floristique rĂ©vĂšle des dynamiques diamĂ©tralement opposĂ©es entre les pĂ©riodes 1988 Ă 1998 et 1998 Ă 2020 dans la vĂ©gĂ©tation. La premiĂšre pĂ©riode a Ă©tĂ© marquĂ©e par un gain considĂ©rable en termes de superficie des jachĂšres du sud-ouest au nord-ouest de la forĂȘt classĂ©e. Alors que la seconde a vu une rĂ©gression significative des surfaces des formations vĂ©gĂ©tales au profit des exploitations cacaoyĂšres. Les relevĂ©s floristiques ont permis dâinventorier 220 espĂšces appartenant Ă 176 genres rĂ©partis en 63 familles. Cette flore comporte 15 espĂšces menacĂ©es (1 EN, 13 VU, 1 NT) et 22 espĂšces endĂ©miques du bloc forestier de la Haute GuinĂ©e (GCW). Ces espĂšces, entre autres Ă©lĂ©ments, confĂšrent Ă cette forĂȘt un intĂ©rĂȘt particulier qui devrait susciter plus dâactions pour sa conservation.
Since the post-electoral crisis, the Goin-Débé classified forest, considered as an area of importance for biodiversity, has been subject to agricultural exploitation and infiltration by peasants, thus jeopardizing its status as a biodiversity refuge. The aim of this study is to assess the state of conservation of the forest's vegetation and flora. To do this, a diachronic study was first carried out using Landsat TM satellite images from 1988 and 1998 and OLI/TIRS images from. Next, a floristic inventory was carried out in the different plant formations of the classified forest. Satellite images and floristic inventory data reveal diametrically opposed vegetation dynamics between the periods 1988 to 1998 and 1998 to 2020. The first period was marked by a considerable gain in fallow area from the south-west to the north-west of the classified forest. The second period, on the other hand, saw a significant decline in the area of plant formations in favor of cocoa farms. Floristic surveys have identified 220 species belonging to 176 genera divided into 63 families. This flora includes 15 threatened species (1 EN, 13 VU, 1 NT) and 22 species endemic to the Upper Guinea Forest Block (GCW), among other elements that give this forest a particular interest for conservation
DiversitĂ© Floristique, Croissance et QualitĂ© du Bois de Cedrela odorata L. (Meliaceae) et Gmelina arborea Roxb (Verbenaceae) dans DiffĂ©rents SystĂšmes de Reboisement dans la ForĂȘt ClassĂ©e de la Besso (Sud-Est de la CĂŽte dâIvoire)
La couverture forestiĂšre de la CĂŽte dâIvoire estimĂ©e Ă environ 16 millions dâhectares dans les annĂ©es 1900 a connu une importante rĂ©gression et elle est passĂ©e de nos jours Ă moins de 3 millions dâhectares. Cette rĂ©duction rĂ©sulte de lâeffet conjuguĂ© de lâurbanisation galopante, de lâagriculture et de lâexploitation des massifs forestiers en bois dâĆuvre. Cette diminution a conduit Ă la perte des essences forestiĂšres commercialisables. La prĂ©sente Ă©tude, rĂ©alisĂ©e dans la forĂȘt classĂ©e de la Besso sâinscrit dans une vision dâamĂ©lioration de la productivitĂ© des plantations forestiĂšres pour un meilleur approvisionnement des industries du bois. Elle vise Ă identifier le modĂšle de reboisement offrant une diversitĂ© floristique Ă©levĂ©e avec une meilleure croissance et qualitĂ© du bois. Les espĂšces utilisĂ©es sont Cedrela odorata L. (Meliaceae) et Gmelina arborea Roxb (Verbenaceae). Les travaux ont Ă©tĂ© effectuĂ©s sur deux types de reboisement (plantation pure et agroforĂȘt Ă base de cafĂ©ier ou de cacaoyer). Plusieurs paramĂštres (quantitatifs et qualitatifs) ont Ă©tĂ© Ă©valuĂ©s suivant les types de reboisement. Il en ressort que lâagroforĂȘt de type Cedrela odorata en association avec le cafĂ©ier est le systĂšme le plus hĂ©tĂ©rogĂšne avec un indice de Shannon de 3,47 et une valeur dâĂ©quitabilitĂ© de PiĂ©lou de 0,93. Cependant, Gmelina arborea en agroforĂȘt avec le cacaoyer prĂ©sente une bonne croissance annuelle (0,04 m). LâagroforĂȘt de type Gmelina arborea associĂ©e au cacaoyer a fourni les meilleures valeurs de cylindricitĂ© et de rectitude. Les rĂ©sultats de cette Ă©tude devraient aider Ă la rĂ©habilitation des Ă©cosystĂšmes forestiers dĂ©gradĂ©s.
The forest cover of CĂŽte d'Ivoire estimated at around 16 million hectares in the 1900s has undergone a significant reduction and it is estimated today at under three million hectares. This reduction is the combined effect of a high rate of urbanization, agriculture, and logging industry. This reduction has led to a depletion of the forests in marketable species. This study on the Besso classified forest is part of a vision to improve the productivity of forest plantations for a better supply of wood industries. It aims to identify a reforestation model with a high floristic diversity with better growth and wood quality. The species used are Cedrela odorata L. (Meliaceae) and Gmelina arborea Roxb (Verbenaceae). Two types of reforestation in the Besso classified forest were carried out namely, pure reforestation plantation and agroforest (coffee and cocoa based). Several parameters (quantitative and qualitative) were evaluated according to the types of reforestation. The results show that the reforestation of Cedrela odorata-coffee agroforest is the most system environment with a Shannon index of 3.47 and a Pielou equitability value of 0.93. However, the Gmelina arborea-cocoa agroforest has the best annual growth rate (0.04 m). The qualitative parameters (cylindricity and straightness) are better in the Gmelina arborea-cocoa agroforest. All these results should help in the rehabilitation of degraded ecosystems and forests
Dynamique Spatio-Temporelle et IntĂ©rĂȘt pour la Conservation de la ForĂȘt ClassĂ©e de Goin-DĂ©bĂ©, une Aire ProtĂ©gĂ©e MenacĂ©e de Disparition Ă lâOuest de la CĂŽte dâIvoire
La forĂȘt classĂ©e de Goin-DĂ©bĂ© considĂ©rĂ©e comme zone dâimportance pour la biodiversitĂ©, est depuis la crise post-Ă©lectorale, lâobjet dâexploitations agricoles et dâinfiltrations par des paysans mettant ainsi en pĂ©ril son statut de refuge de la biodiversitĂ©. Ainsi, cette Ă©tude vise Ă©valuer lâĂ©tat de conservation de la vĂ©gĂ©tation et de la flore de cette forĂȘt. Lâexploitation des images satellitaires couplĂ©e aux analyses des donnĂ©es dâinventaire floristique rĂ©vĂšlent des dynamiques diamĂ©tralement opposĂ©es entre les pĂ©riodes 1988 Ă 1998 et 1998 Ă 2020 dans la vĂ©gĂ©tation. La premiĂšre pĂ©riode a Ă©tĂ© marquĂ©e par un gain considĂ©rable en termes de superficie des jachĂšres du sud-ouest au nord-ouest de la forĂȘt classĂ©e. Alors que la seconde a vu une rĂ©gression significative des surfaces des formations vĂ©gĂ©tales au profit des exploitations cacaoyĂšres. Les relevĂ©s floristiques ont permis dâinventorier 220 espĂšces appartenant Ă 176 genres rĂ©partis en 63 familles. Cette flore comporte 15 espĂšces Ă statut particulier selon la liste rouge de lâUICN (2020, 2021 & 2022) et 22 espĂšces endĂ©miques du bloc forestier de la Haute GuinĂ©e (GCW), entre autres Ă©lĂ©ments qui confĂšrent Ă cette forĂȘt un intĂ©rĂȘt particulier pour la conservation.
Since the post-electoral crisis, the Goin-Débé classified forest, considered as an area of importance for biodiversity, has been subject to agricultural exploitation and infiltration by peasants, thus jeopardizing its status as a biodiversity refuge. The aim of this study is to assess the state of conservation of the forest's vegetation and flora. Satellite images and floristic inventory data reveal diametrically opposed vegetation dynamics between the periods 1988 to 1998 and 1998 to 2020. The first period was marked by a considerable gain in fallow area from the south-west to the north-west of the classified forest. The second period, on the other hand, saw a significant decline in the area of plant formations in favor of cocoa farms. Floristic surveys have identified 220 species belonging to 176 genera divided into 63 families. This flora includes 15 species with special status according to the IUCN Red List (2020, 2021 & 2022) and 22 species endemic to the Upper Guinea Forest Block (GCW), among other elements that give this forest a particular interest for conservation
Inter-individual relationships within a Canadian SPOR research network: a social network study
Efforts have been made by health research granting agencies to bring research closer to patientsâ concerns. In Canada, such efforts were formalized in 2011 with the funding of the Strategy for Patient-Oriented Research (SPOR)âs research networks to address research priorities identified by patients and accelerate the translation of research findings into patient care and health care policy. Among these networks, SPOR Diabetes Action Canada (DAC) has created patient-partner circles to facilitate their integration within the network. The nature of the relationships within this atypical patient-oriented research network is systematically explored in this paper