Resumen

LIOTTA, Jorge. Rasgos biológicos de salix humboldtiana willd. y régimen de pulsos de inundación. INCI [online]. 2001, vol.26, n.9, pp.397-403. ISSN 0378-1844.

The flood pulse is a key-factor in the eccesis of the Salix humboldtiana Willd. (creole willow) forests in the lower Paraná River. The control is expressed mainly by two processes: a) the appearance of banks suitable for the colonization by these trees. These gallery forests also increase the soil level through retention of sediments by the woods determining the levee formation, and b) the erosion, which progressively remove the levees with the mature trees. Several traits of the biology of the willow, such as production of great quantity of small seeds that germinate in very humid substrates, and far from the trees of the previous generation, high speed of growth, adaptations to the flood, have allowed their survival in this highly dynamic environment.

Palabras clave : Ecología ; Río Paraná ; Salix humboldtiana ; Régimen de Pulsos .