Asociación Latinoamericana de Micología. Diversity in soil fungi from Celtis tala and Scutia buxifolia forests in eastern Buenos Aires

ELÍADES L. A.; CABELLO M.N.; BUCSINSZKY, A. M.; C. VOGET

Brasilia, Brasil

Congreso; V Congreso Latinoamericano de Micología; 2005

The native dry forest rich in Celtis tala and Scutia buxifolia constitutes the main woodland community of the Eastern Pampa in Buenos Aires province. Woody ranges are located along the Plata river. These trees grow in lime soils of biological origin classified as Rendoll. Between thse woody ranges, a salt meadow lies in inter-ranges: the alluvial soils with high sodium content are characterized as Natracualf, whereas the moist meadow with defective drain and hydromorphyc, non-alkaline soils are described as Argialbol. Our aim was to study the composition of soil micobiota at two different depths in each type of soil: Rendoll, Natracualf, and Argialbol using soil washing methods. The frequency of appearance of fungal species was used to calculate the diversity index (H); species richness (S) y eveness (E). Sixty nine taxa were isolated from Rendoll, 56 from Natracualf and 51 from Argialbol in the 2 depths. Fusarium solani and F. oxysporum, were the most frequent species in all soils and depths. Talaromyces stipitatus, T. flavus var flavus were the most common Ascomycota. In Rendoll soils biodiversity indexes were H= 5.44; E= 0.89 and S= 69, in Natracualf H= 4.76, E= 0.82 and S= 56 whereas in Argialbol H= 4.64, E= 0.82 and S= 51.