Data/hora: 04/06/2024 14:56:51

Provedor de dados: 	95	
País: 	Brazil	
Título: 	Soil seed bank variation patterns according to environmental factors in a natural grassland	
Autores: 	Maia,Fernanda Costa; Medeiros,Renato Borges de; Pillar,Valério de Patta; Focht,Telmo.	
Data: 	2004-12-01	
Ano: 	2004	
Palavras-chave: 	Buried seeds; Moisture; Grassland ecosystem.	
Resumo: 	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.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-31222004000200018	
Editor: 	Associação Brasileira de Tecnologia de Sementes	
Relação: 	10.1590/S0101-31222004000200018	
Formato: 	text/html	
Fonte: 	Revista Brasileira de Sementes  v.26 n.2 2004	
Fonte: 	info:eu-repo/semantics/openAccess