Data/hora: 02/06/2024 06:47:44

Biblioteca(s): 	Embrapa Pantanal.	
Data corrente: 	29/06/1995	
Data da última atualização: 	05/04/2017	
Autoria: 	CAWKER, K. B.	
Título: 	Fire history and grassland vegetation change: three pollen diagrams from southern British Columbia.	
Ano de publicação: 	1983	
Fonte/Imprenta: 	Canadian Journal of Botany, v.61, n.4, p.1126-1139, 1983.	
Idioma: 	Inglês	
Conteúdo: 	Recent vegetation change in the grassland of southern British Columbia is examined using pollen analysis and the results are compared with documentary records. The increasing dominance of the grassland after 1890 by Artemisia tridentata and other woody shrubs has often been attributed to overgrazing by domestic livestock, but pollen data indicate that shrub populations were  substantial in presettlement times, and that the recent invasion represents a recovery from anomalously low population levels during the middle 19th century. These low Artemisia populations were probably due to a high frequency of fire in the early settlement period and the subsequent recovery is probably related to fire suppression. Fire appears to have been an important element in the ecology of these grassland over a long period and it may have a place in modern management schemes.	
Palavras-Chave: 	Fire; Management; Natural pasture.	
Thesagro: 	Fogo; Manejo; Pastagem Natural; Queimada; Vegetação.	
Thesaurus Nal: 	burning; vegetation.	
Categoria do assunto: 	--	
Registro original: 	Embrapa Pantanal (CPAP)	
Exemplares: 	CPAP - (28441-1) - ADD - SP - PP - SP14461 -  - 14461 - DIS