Multiscale productivity of boletes: influence of the host tree features and soil properties in Benin (West-Africa)
Badou Akotchayé sylvestre1, Houdanon Roel dire2, Soulemane yorou Nourou3
1Research unit "tropical mycology and plants-soil fungi interactions" (UR / MyTIPS), Doctoral thesis submitted in fulfillment of the requirements for the degree of doctor in agricultural sciences, faculty agronomy, university of parakou, Benin
There are many environmental factors that significantly influence the natural production of the ectomycorrhizal fungi community around the world. However, the influence of its factors on fungi has been little studied in West Africa. This study aims to assess the influence of the dendrometric characteristics of host trees and the edaphic parameters of the soil on the natural production of boletes in the Ouémé Supérieur forest reserve in northern Benin. For this purpose, the pH in soil water (pH-H2O), pH in potassium chloride (pH.KCl), calcium carbonate (CaCO3), organic carbon (C.org), total nitrogen (N.tot ), ammonium (NH4 +), nitrate (NO3-), available phosphorus (P.ass), silt, clay, sand, diameter at breast heigh , the basal area of host trees were correlated with abundance, fresh biomass and species richness of boletes. The effect of these factors on the abundance, biomass and species richness of boletes was tested using generalised linear models. The results showed among soil parameters, that only the clay available in the soil has a significant positive influence (donne la probabilité) on the multiscale variation of the fresh biomass of the boletes community. Therefore, the natural production of fresh biomass requires a soil rich in clay with a pH (pH.H2O = 4 and pH.KCl = 4.5), a low proportion of available phosphorus (P.ass) and calcium carbonate. (CaCO3). Concerning, floristic variable, only basal area of tress positive and significant has positive and significant effect on spatial variation of biomass of boletes. Boletes from the Ouémé Supérieur forest reserve exhibit multi-scale productivity (abundance of boletes and fresh biomass) (different productive trends) throughout the mycological season, all vegetation combined. The diameter and basal area of each partner tree have a significantly positive influence on the multiple scale variation of fresh biomass of boletes.
Keywords: Abundance, boletes, dendrometric characteristics, edaphic parameters, fresh biomass
Contact Address: Badou Akotchayé sylvestre, Research unit "tropical mycology and plants-soil fungi interactions" (UR / MyTIPS), Doctoral thesis submitted in fulfillment of the requirements for the degree of doctor in agricultural sciences, faculty agronomy, university of parakou, Okedama, 125 Parakou, Benin, e-mail: sbadouymail.com