Ecological niche information supports taxonomic delimitation of Irvingia gabonensis and I. wombolu (Irvingiaceae)

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AuteurVIHOTOGBE, ROMARIC L
AuteurRAES, N
AuteurVAN DEN BERG, R G
AuteurSINSIN, BRICE AUGUSTIN
AuteurSOSEF, M S M
Date d'ajout2026-06-02T16:06:57Z
Date de disponibilite2026-06-02T16:06:57Z
Date de publication2019
ResumeAfrican bush mango trees (Irvingiaceae) are priority food trees inWest and Central Africa. There are bitter- and sweet-fruited species, which are difficult to distinguish based on morphological characters. This has led to a debate about their correct taxonomic status. Furthermore, it is unclear whether they are native to the Dahomey Gap, the dry and hot area, separating the twoWest African forest blocks. This study evaluates the ecological differences between bitter- and sweet-fruited species in tropical Africa, and the nature (wild vs. cultivated) of the occurrences in the Dahomey Gap, in order to discuss the current taxonomical opinions. Irvingia gabonensis and I. wombolu occurrence data were combined with climate and soil data in MaxEnt to produce environmental niche models. Environmental niche identity tests were carried out in ENM-Tools. Wild sweet-fruited trees were predicted in the Guinean–Congolian pytogeographical region, while the predicted occurrence of bitterfruited trees extended to the Guineo–Congolia/Sudania and Lake Victoria transition zones. The related niche difference is significant, supporting the taxonomical opinion that bitter- and sweet-fruited species are two different taxa.We also conclude that bitter-fruited trees occur naturally in the Volta forests (Dahomey Gap).Moreover, our results support that I. gabonensis is not native to the Dahomey Gap. In historical times, theywere probably introduced from Nigeria.
DOI10.1016/j.sajb.2019.08.025
Autre identifiantBECDB-9984
URIhttps://dspace.uac.bj/handle/123456789/8883
Languefr
Fait partie deSouth African Journal of Botany
SujetIrvingia gabonensis
SujetI. wombolu
Sujettaxonomy
Sujetecology
Sujetniche
TitreEcological niche information supports taxonomic delimitation of Irvingia gabonensis and I. wombolu (Irvingiaceae)
TypeArticle

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