SciELO - Scientific Electronic Library Online

 
vol.26 número2Effect of different periods of accelerated aging on corn physiological seed quality and íon and soluble protein leakageEvaluation of seed quality in Tabebeuia serratifolia Vahl Nich. and T. impetiginosa (Martius ex A. P. de Candolle) Standley - (Bignoniaceae) by X-ray test índice de autoresíndice de materiabúsqueda de artículos
Home Pagelista alfabética de revistas  

Servicios Personalizados

Revista

Articulo

Indicadores

Links relacionados

Compartir


Revista Brasileira de Sementes

versión impresa ISSN 0101-3122

Resumen

MAIA, Fernanda Costa; MEDEIROS, Renato Borges de; PILLAR, Valério de Patta  y  FOCHT, Telmo. Soil seed bank variation patterns according to environmental factors in a natural grassland. Rev. bras. sementes [online]. 2004, vol.26, n.2, pp.126-137. ISSN 0101-3122.  http://dx.doi.org/10.1590/S0101-31222004000200018.

This research aimed to determine the soil seed bank and its relationship with environmental factors that have an influence in the distribution of the vegetation above the ground in an excluded area of natural grassland in the South of Brazil. Most of the 122 identified species in the seed bank were perennials. Data analysis indicated three distinct community groups, according to the size and composition of the soil seed bank in lowlands with permanent wet soils, in lowlands and in other areas. In general, lowlands were characterized by low-fertility soils, high moisture and aluminum contents, being spatially homogeneous habitats and, therefore, more restricted to vegetation heterogeneity than other parts of the relief. Environmental factors most associated with soil seed bank size and composition were relief position and their co-related soil variables such as: soil moisture content, potassium content, organic matter, basic saturation of cation exchange soil capacity, exchangeable basics sum of the soil and clay soil content. According to that, relief position, associated with combined effects of soil chemical properties related to it, determines the observed variation pattern of the soil seed bank, as a reflection of the vegetation above the area.

Palabras clave : buried seeds; moisture; grassland ecosystem.

        · resumen en Portugués     · texto en Inglés     · Inglés ( pdf )

 

Creative Commons License Todo el contenido de esta revista, excepto dónde está identificado, está bajo una Licencia Creative Commons