Data/hora: 04/06/2024 07:33:51

Provedor de dados: 	85	
País: 	Argentina	
Título: 	Contribution of different bud types to community regeneration on a typical steppe under various enclosure durations in Inner Mongolia, China	
Autores: 	Qian,J; Wang,Z; Liu,Z; Kuang,W; Busso,CA.	
Data: 	2014-12-01	
Ano: 	2014	
Palavras-chave: 	Grazing; Bud banks; Vegetative regeneration; Reproduction ecology; Restoration ecology.	
Resumo: 	Understanding the changes in the total bud bank, and its contribution to community regeneration, in response to grassland enclosure to livestock grazing, is crucial for grassland management. Despite its importance, the contribution of the total bud bank and that of different bud types to community regeneration as a whole have been rarely explored. The vegetative offspring recruited from different bud types was investigated in grasslands having different enclosure durations to livestock grazing on a typical steppe of Inner Mongolia, China. Total vegetative offspring density was significantly higher (p&lt;0.05) under continuous grazing than in fenced grasslands, but no significant changes were found among plots with different enclosure durations to livestock grazing. The percentage and density of tiller-ramets were significantly higher (p&lt;0.05) under continuous grazing than in fenced grasslands. However, rhizome-ramets followed an opposite pattern (p&lt;0.05). Bulb-ramets showed negligible differences in percentage and density among grasslands with different enclosure durations to livestock grazing and those exposed to continuous grazing. Root-derived ramets only occurred in fenced plots. Our results indicate that (1) grassland enclosure to domestic livestock reduce vegetative regeneration from belowground bud banks; (2) enclosure duration to livestock grazing showed no evident effect on the whole contribution of the belowground bud bank to vegetative regeneration, but changed the relative contribution of the different bud types, and (3) while grassland enclosure to livestock grazing reduced density of tiller-ramets, rhizome- and root-derived sapling densities were increased. Therefore, changes in the regenerative contribution of different bud types might be used to (1) predict community dynamic under disturbances and climatic changes, and (2) delineate adequate policies for grassland management and utilization	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572014000200024	
Editor: 	Fundación Rómulo Raggio	
Formato: 	text/html	
Fonte: 	Phyton (Buenos Aires)  v.83 n.2 2014	
Fonte: 	info:eu-repo/semantics/openAccess