Effets De L\'eclaircie Selective, Par Devitalisation, Sur La Croissance En Epaisseur Des Essences Principales Dans La Foret Classee De Bossematie (Côte d\'ivoire)

Kouadio, K; Kouassi, K. P.; Kouamé, NF; Traore, D

doi:10.4314/aga.v19i1.1702

Cited by 2 publications

(2 citation statements)

References 3 publications

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“…In fact, they have a very high tillering capacity, and a high regrowth capacity after grazing and bushfres [56]. Tey are also resistant to climatic hazards and cryptogamic diseases [57].…”

Section: Climatic Constraintsmentioning

confidence: 99%

Ecology of Echinops giganteus A. Rich. in Sub-Saharan Africa: Distribution, Ecoclimatic Niche, and Phytosociology

Sonkoué

Youga

Kenfack

et al. 2023

International Journal of Ecology

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Echinops giganteus A. Rich. is an aromatic and medicinal plant of the Asteraceae family exploited in Cameroon under the access and benefit sharing (ABS) standard. Despite its importance, little information exists on the ecology of E. giganteus. The aim of the present study was to contribute to a better understanding of its ecology for sustainable management in the Western Highlands of Cameroon. Occurrence data as well as stationary ecological information were collected in the field and from different databases. Bioclimatic data were extracted from the WorldClim database and processed using DIVA-GIS and Maxent software. The Braun-Blanquet quadrat method was used for the phytosociological study. Results showed that the distribution of E. giganteus in its wild state is restricted to sub-Saharan Africa. This distribution is likely conditioned by altitude (1000 m–2600 m), light, temperature, and rainfall. The bioclimatic variables that best explained this distribution were the mean annual temperature (Bio1: 38.8%) and the precipitation of the coldest quarter (Bio19: 24.9%), and their favorable ranges were between 2°C–32°C and 300 mm–1800 mm, respectively. E. giganteus is a heliophilic plant that prefers well-drained substrates and would not have a requirement for organic matter. The floristic analysis of the E. giganteus community identified 68 plant species in 59 genera and 28 botanical families, with the most represented family being the Asteraceae (49%). The average species richness per quadrat was 8 species, dominated by herbs. Species consistent with E. giganteus were Aspilia africana (Pers.) C. D. Adams and Imperata cylindrica (L.) P. Beauv. Chamaephytes and Phanerophytes were dominant among the biological types, while the phytogeographic types were dominated by Pantropical species (38.23%). The most represented diaspore types and modes of dissemination were pogonochores (35.85%) and anemochores (55.38%).

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“…In fact, they have a very high tillering capacity, and a high regrowth capacity after grazing and bushfres [56]. Tey are also resistant to climatic hazards and cryptogamic diseases [57].…”

Section: Climatic Constraintsmentioning

confidence: 99%

Ecology of Echinops giganteus A. Rich. in Sub-Saharan Africa: Distribution, Ecoclimatic Niche, and Phytosociology

Sonkoué

Youga

Kenfack

et al. 2023

International Journal of Ecology

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“…Pour toute placette éclaircie, la valeur de la surface terrière dévitalisée correspond au taux d'éclaircie. Ce taux exprime le degré de stress subi par le peuplement (Fredericksen and Mostacedo, 2000 ;Kouadio et al, 2007). L'indicateur de la productivité est la surface terrière du peuplement commercial (G ep ).…”

Section: Analyse Des Donneesunclassified

Détermination des paramètres influents de la dynamique des forêts naturelles ivoiriennes

Chessel¹,

Kadio²,

Pascal³

2010

Agronomie Africaine

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RESUMEEn forêts naturelles, la recherche de la rentabilité économique constitue une préoccupation essentielle. Ainsi, les sylviculteurs concentrent-ils le plus souvent leurs interventions en vue de stimuler et d'accroître la dynamique des espèces commerciales au détriment des espèces non commerciales. L'efficacité de ces interventions sylvicoles a déjà été démontrée par de nombreux chercheurs en forêt sempervirente (dispositif permanent d'Irobo) et en forêt semi-décidue (dispositif permanent de Mopri). Les résultats de la présente étude confirment l'impact positif des éclaircies sélectives sur la dynamique de ces deux types de forêts. Le taux d'accroissement de la surface terrière du peuplement commercial est significativement plus élevé dans les placettes éclaircies que dans les placettes témoins. Il est proportionnel à l'intensité d'éclaircie. Il ressort en outre que la productivité des forêts naturelles ne dépend pas uniquement de la compétition interspécifique. Elle dépend aussi de la composition floristique et des propriétés individuelles des espèces au profit desquelles les éclaircies sont appliquées. Dans la forêt classée de Mopri, le taux d'accroissement de la surface terrière du peuplement commercial est dépendant de la dynamique individuelle des espèces les plus abondantes : Celtis mildbraedii (Ulmaceae) et Gambeya africana (Sapotaceae). Mots clés :Forêt sempervirente, forêt semi-décidue, peuplement commercial, éclaircie sélective, taux d'accroissement, surface terrière ABSTRACT DETERMINATION OF THE INFLUENTIAL PARAMETERS OF IVORIAN NATURAL FORESTS DYNAMICS In natural forests, the economical profitability constitutes an important concern. Thus, the interventions of silviculture managers aim generally in stimulating and increasing the commercial stand dynamics in detriment of the non commercial species. The efficiency of these silvicultural interventions has already been shown out by many researchers in evergreen forest (permanent plots of Irobo) and in semi-deciduous forest (permanent plots of Mopri

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Effets De L\'eclaircie Selective, Par Devitalisation, Sur La Croissance En Epaisseur Des Essences Principales Dans La Foret Classee De Bossematie (Côte d\'ivoire)

Cited by 2 publications

References 3 publications

Ecology of Echinops giganteus A. Rich. in Sub-Saharan Africa: Distribution, Ecoclimatic Niche, and Phytosociology

Ecology of Echinops giganteus A. Rich. in Sub-Saharan Africa: Distribution, Ecoclimatic Niche, and Phytosociology

Détermination des paramètres influents de la dynamique des forêts naturelles ivoiriennes

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