Séne S. auteur aut IRD Avril R. auteur aut IRD Chaintreuil Clémence auteur aut IRD Geoffroy A. auteur aut IRD Ndiaye C. auteur aut IRD Diedhiou A. G. auteur aut IRD Sadio O. auteur aut IRD Courtecuisse R. auteur aut IRD Sylla S. auteur aut IRD Selosse M. A. auteur aut IRD Bâ Amadou auteur aut IRD text journalArticle eng text/pdf born digital access We studied belowground and aboveground diversity and distribution of ectomycorrhizal (EM) fungal species colonizing Coccoloba uvifera (L.) L. (seagrape) mature trees and seedlings naturally regenerating in four littoral forests of the Guadeloupe island (Lesser Antilles). We collected 546 sporocarps, 49 sclerotia, and morphotyped 26,722 root tips from mature trees and seedlings. Seven EM fungal species only were recovered among sporocarps (Cantharellus cinnabarinus, Amanita arenicola, Russula cremeolilacina, Inocybe littoralis, Inocybe xerophytica, Melanogaster sp., and Scleroderma bermudense) and one EM fungal species from sclerotia (Cenococcum geophilum). After internal transcribed spacer (ITS) sequencing, the EM root tips fell into 15 EM fungal taxa including 14 basidiomycetes and 1 ascomycete identified. Sporocarp survey only weakly reflected belowground assessment of the EM fungal community, although 5 fruiting species were found on roots. Seagrape seedlings and mature trees had very similar communities of EM fungi, dominated by S. bermudense, R. cremeolilacina, and two Thelephoraceae: shared species represented 93 % of the taxonomic EM fungal diversity and 74 % of the sampled EM root tips. Furthermore, some significant differences were observed between the frequencies of EM fungal taxa on mature trees and seedlings. The EM fungal community composition also varied between the four investigated sites. We discuss the reasons for such a species-poor community and the possible role of common mycorrhizal networks linking seagrape seedlings and mature trees in regeneration of coastal forests. specialized Common mycorrhizal network Fungal species richness ITS sequencing Regeneration Seagrape coastal forests GUADELOUPE 084 082 25 7 547-559 2015 0940-6360 https://www.documentation.ird.fr/hor/fdi:010065286 10.1007/s00572-015-0633-8 0940-6360 [F B010065286] https://www.documentation.ird.fr/hor/fdi:010065286 https://www.documentation.ird.fr/intranet/publi/2015/10/010065286.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2015-11-06 2017-08-23 fdi:010065286 fre