Etude phytosociologique des Savanes de basse Cote d'Ivoire (Savanes lagu�aires)

Adjanohoun, E. J.

doi:10.1007/bf00301296

Cited by 15 publications

(6 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Finally, these dryland forest relics are also dominated by widely distributed species characteristics of semi-deciduous forests and dry forests such as Ceiba pentandra and Antiaris toxicaria var. africana (Dupuy (1998) and Adjanohoun (1964)). The dominant species (10 out of 118 inventoried species, 8% of species) contribute to a large share of the carbon stock (~ 70%) because they have the largest number of homogeneously distributed individuals and the largest number of large diameter individuals in the stand.…”

Section: Dominant Speciesmentioning

confidence: 99%

Tree Allometry and Stand Structure in Dryland Forests Relics of Northern Côte D’Ivoire

GUEULOU,

Coulibaly,

Fayolle

et al. 2023

Preprint

View full text Add to dashboard Cite

Section: Dominant Speciesmentioning

confidence: 99%

Tree Allometry and Stand Structure in Dryland Forests Relics of Northern Côte D’Ivoire

GUEULOU,

Coulibaly,

Fayolle

et al. 2023

Preprint

View full text Add to dashboard Cite

“…In the LSR area, fire has been held responsible for the presence of savannas where climate should be able to sustain rainforests (Monnier 1968). Adjanohoun (1964) defines Guinean savannas as "stretches of tall grass enclosed in dense forests or between these and open forests− they are scattered with trees and palms− they contain relict patches of dense forest and are crossed by numerous gallery forests− without fire they develop into dense semi-deciduous forests''. Over the 20-year period from 1998 to 2017, the average annual temperature and precipitation of LSR region were 28.5 °C and 1218 mm respectively.…”

Section: Study Area and Sampling Sitesmentioning

confidence: 99%

“…(Annonaceae) is also an abundant species but only in the shrub layer. According to Adjanohoun (1964), these five species belong to the Brachiaria Brachylopha Stapf (Poaceae) association and are native to the Sudano-Zambezian region before being acclimatized to humid conditions. Among these species, C. arborea and C. febrifuga grow only as single-stemmed trees from young to adult stages, whereas P. thonningii and B. ferruginea exist as single-stemmed trees or multi-stemmed shrubs, and A. senegalensis maintains a shrubby growth form in both young and old developmental stages (Monnier 1968;Menaut 1971).…”

Section: Species Of the Studymentioning

confidence: 99%

Multispecies allometric equations for shrubs and trees biomass prediction in a Guinean savanna (West Africa)

Kouamé¹,

Millan²,

N’Dri³

et al. 2022

Silva Fenn.

View full text Add to dashboard Cite

Currently, tools to predict the aboveground and belowground biomass (AGB and BGB) of woody species in Guinean savannas (and the data to calibrate them) are still lacking. Multispecies allometric equations calibrated from direct measurements can provide accurate estimates of plant biomass in local ecosystems and can be used to extrapolate local estimates of carbon stocks to the biome scale. We developed multispecies models to estimate AGB and BGB of trees and multi-stemmed shrubs in a Guinean savanna of CÃ´te dâIvoire. The five dominant species of the area were included in the study. We sampled a total of 100 trees and 90 shrubs destructively by harvesting their biometric data (basal stem diameter , total stem height , stump area , as well as total number of stems for shrubs), and then measured their dry AGB and BGB. We fitted log-log linear models to predict AGB and BGB from the biometric measurements. The most relevant model for predicting AGB in trees was fitted as follows: AGB = 0.0471 () (with AGB in kg and in g cm m). This model had a bias of 19%, while a reference model for comparison (fitted from tree measurements in a similar savanna ecosystem, Ifo et al. 2018) overestimated the AGB of trees of our test savannas by 132%. The BGB of trees was also better predicted from ÏDb2H as follows: BGB = 0.0125 () (BGB in kg and in g cm m), with 6% bias, while the reference model had about 3% bias. In shrubs, AGB and BGB were better predicted from together with the total number of stems (). The best fitted allometric equation for predicting AGB in shrubs was as follows: AGB = 0.0191 () . This model had about 1.5% bias, while the reference model overestimated the AGB of shrubs of Lamto savannas by about 79%. The equation for predicting BGB of shrubs is: BGB = 0.0228 () that overestimated the BGB of the shrubs of Lamto savannas with about 3% bias, while the reference model underestimated the BGB by about 14%. The reference model misses an important feature of fire-prone savannas, namely the strong imbalance of the BGB/AGB ratio between trees and multi-stemmed shrubs, which our models predict. The allometric equations we developed here are therefore relevant for C stocks inventories in trees and shrubs communities of Guinean savannas.DbHSSnÏDb2H0.915ÏDb2Hâ1ÏDb2H0.6899ÏDb2Hâ1ÏDb2HnÏDb2H0.6227n0.9271ÏDb2H0.7205n0.992

show abstract

“…Indeed, this savanna intermingled with small forest patches within the Dahomey gap, is also seen as a cultural landscape, produced by humans for subsistence, security and/or worship uses of religious traditions ( Juhé-Beaulaton 2010 ; Cousin 2018 ). Consequently, the vegetation of Benin which is supposed to be luxuriant is today largely dominated by farms, fallows and grasslands ( Adjanohoun 1966 ; Jenik 1994 ; Sosef et al 2017 ). One fifth of the original forests remain, fragmented into isolated patches ( Poorter et al 2004 ).…”

Section: Introductionmentioning

confidence: 99%

“…Up to now, this relic still persists on a community land while showing insular characteristics with some rare and poorly known plant species. Earlier botanists who worked on this refugium include Chevalier (1910) , Aubréville (1937) and Adjanohoun (1966) . They noted the typical feature of the Ewe-Adakplame Relict Forest ( EARF ) described as a Timber-refuge of the time of tribal wars, as one having a considerable number of African rain forest species of Guineo-Congolean region comparable to those of Côte d’Ivoire ( Adjanohoun et al 1989 , P. 20).…”

Section: Introductionmentioning

confidence: 99%

A checklist of vascular plants of Ewe-Adakplame Relic Forest in Benin, West Africa

Houngnon¹,

Adomou

Gosling

et al. 2021

View full text Add to dashboard Cite

Covering 560.14 hectares in the south-east of Benin, the Ewe-Adakplame Relic Forest (EARF) is a micro-refugium that shows insular characteristics within the Dahomey Gap. It is probably one of the last remnants of tropical rain forest that would have survived the late Holocene dry period. Based on intensive field investigations through 25 plots (10 × 50 m size) and matching of herbarium specimens, a checklist of 185 species of vascular plant belonging to 54 families and 142 genera is presented for this forest. In addition to the name for each taxon, we described the life form following Raunkiaer’s definitions, chorology as well as threats to habitat. The Rubiaceae family was the richest (20 species) followed by the Fabaceae (15 species). Life forms showed the preponderance of phanerophytes (88%). The Chorological spectrum was dominated by Guineo-Congolean species (66%). Species richness estimated were 200.52 ± 9.2808 for Bootstrap; 217.62 ± 14.5972; 224.16 ± 15.3725 and 242.67 respectively for Chao, Jacknife1 and Jacknife2. Bootstrap appears to be the estimation closer to the field records. In Benin, EARF is home for Rinorea species described as West African forest bio-indicators and single location for Nesogordonia papaverifera, Mansonia altissima, Englerophytum oblanceolatum, Octolobus spectabilis, Vitex micrantha and most of Drypeteae tribe species (Drypetes aframensis, Drypetes afzelii, Drypetes gilgiana and Drypetes leonensis) recorded in Benin. Our results provides baseline information for further in-depth analysis of vegetation history in Benin by raising the question on the past floristic connection of the Dahomey gap and community engagement in conservation.

show abstract

Etude phytosociologique des Savanes de basse Cote d'Ivoire (Savanes lagu�aires)

Cited by 15 publications

References 5 publications

Tree Allometry and Stand Structure in Dryland Forests Relics of Northern Côte D’Ivoire

Tree Allometry and Stand Structure in Dryland Forests Relics of Northern Côte D’Ivoire

Multispecies allometric equations for shrubs and trees biomass prediction in a Guinean savanna (West Africa)

A checklist of vascular plants of Ewe-Adakplame Relic Forest in Benin, West Africa

Contact Info

Product

Resources

About