Modelización espacial del hábitat potencia de la trufa negra (Tuber melanosporum Vittad.) en la provincia de Huesca (España)

Abstract

Black truffle (Tuber melanosporum Vittad.) cultivation is especially complicated by their environmental requirements. We propose in this paper a distribution model of habitat for Huesca province (Spain). We used conditioning and restricting factors to the presence of the species in territory based on previous ex-Gonperiences, and supported by a broad collection of field samples. Environmental variables can explain the presence/absence of the species in the study area. These variables are classified in three groups according to their nature: climatic, topographic and edaphic. We integrated in a GIS all parameters to unify spatial resolution, and by a multi-criteria decision model weighted them to obtain suitability areas. The weights allocation were assigned in function of their importance to black truffle presence and previous experiences. The combination of environmental variables that are conditioning and restricting the presence of black truffle in territory, generates a cartography of potential habitat distribution at different levels These levels are areas with more or less production ability of black truffle. Results show that 2.75% of province has an optimal aptitude to species development, this number is reduced to 1.62% in potential cultivation. Map was validated with available presences of known truffle locations in study area.