Diversity, structure, and evolution of fungal comunities in soils recently subjected to agriculture

CABELLO M; AON M; VELÁZQUEZ S

BOLETíN DE LA SOCIEDAD ARGENTINA DE BOTáNICA

SOCIEDAD ARGENTINA DE BOTÁNICA

Año: 2003 vol. 38 p. 3 - 4

0373-580X

This work invetigates the diversity, structure and evolution of fangal communities in soils, which have been recently subjected to agricultural practices. The soils analyzed belong to two different management regimens in the El Salado river basin (Buenos Aires, Argentina). An attemp is made to analyze the sustainability of continuous crop rotation (soil I) and crp-pasture rotation (soil II) under conventional or no-tillage managements. Three groups of fungi were deliniated based on frequency patterns: dominant, opportunist and specialist. Rank-frequency diagrams show that the fungal diversity (richness and eveness) increases inmediately in response to tillage and cultivation (soybean, wheat) or mixed-legume-grass pasture production. The results obtained point out the existence of a strong fungal association, irrespective of the agronomic and management practices.