HYPHOMYCETES CELULOLITICOS EN SUELOS DE BOSQUES DE NOTHOFAGUS, TIERRA DEL FUEGO

A. E. Martínez; V. M. Chiocchio; A. M. Godeas

Authors

A. E. Martínez Departamento de Ciencias Biológicas. Facultad de Ciencias Exactas y Naturales. Universidad de Buenos Aires. 4to piso. II Pabellón. Ciudad Universitaria. 1428. Buenos Aires. Argentina.
V. M. Chiocchio Departamento de Ciencias Biológicas. Facultad de Ciencias Exactas y Naturales. Universidad de Buenos Aires. 4to piso. II Pabellón. Ciudad Universitaria. 1428. Buenos Aires. Argentina.
A. M. Godeas Departamento de Ciencias Biológicas. Facultad de Ciencias Exactas y Naturales. Universidad de Buenos Aires. 4to piso. II Pabellón. Ciudad Universitaria. 1428. Buenos Aires. Argentina.

Keywords:

cellulolytic hyphomycetes, Nothofagus forest

Abstract

Cellulolytic fungi associated with soils of three different pristines forests of Nothofagus (N.pumilio (Poepp. et Endl.) Krasser, N. antarctica (Forst.) Oerst. and N. betuloides (Mirb.) Oerst.) in Tierra del Fuego were studied. Cellulolytic efficiency for
each soil and species was determined using Na CMC (carboxymethyl cellulose sodium salt) as carbon supplies.

Using Principal Component Analysis (PCA) the first two components explained 77.23 % of variance among places related to fungal species. The first component was associated with differences in the quality of cellulolytic resources (grasses in N. anctartica forest vs wood in N. pumilio and N. betuloides) on soil surface. The second component was associated with differences in the quantity of litter on soil surface.

The effect of disturbance in the community cellulolytic microfungi of N. pumilio forest was studied using PCA. The first two components explain 75.59% of variance among places related to fungal species and was associated with differences in the amount of litter on the floor.