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	Provedor de dados Darwiniana (1) Gayana Botánica (1) Autor CHRISTIE,DUNCAN A (1) GONZÁLEZ,MAURO E (1) LE QUESNE,CARLOS (1) Larrea Alcázar,Daniel (1) López,Ramiro P. (1) Macía,Manuel J. (1) SZEJNER,PAUL (1) Mais... Palavra-chave Southern flora (2) Alerce (1) Andes (1) Chaco (1) Ciprés de las Guaitecas (1) Cordillera de la Costa (1) Deforestation (1) Dry floras (1) Floristic discontinuity (1) Natural regeneration (1) Northern flora (1) Pleistocenic lowland forest (1) Mais... Tipo do documento Info:eu-repo/semantics/article (1) Journal article (1) Ano 2011 (1) 2006 (1) País Argentina (1) Chile (1) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última The arid and dry plant formations of South America and their floristic connections: new data, new interpretation? Darwiniana López,Ramiro P.; Larrea Alcázar,Daniel; Macía,Manuel J.. In this study we aimed at testing two hypothesis about the biogeography of South America: (1) the existence of a marked discontinuity in the Andes of central Peru that separates the floras of northern and southern South America and (2) the occurrence of a more or less continuous semi-deciduous forest in South America during the Pleistocene. We conducted a search for different sources of published information on the flora (inventories) of 19 dry regions in South America as well as one region in Central America and another in North America. In order to analyze the data, we employed ordination and classification techniques, which give a more objective picture of the phytogeographical relationships. Additionally, we evaluated similarity scores between the... Tipo: Info:eu-repo/semantics/article Palavras-chave: Dry floras; Floristic discontinuity; Northern flora; Pleistocenic lowland forest; Southern flora; Andes; Chaco. Ano: 2006 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0011-67932006000100002 Recovery of Pilgerodendron uviferum (D. Don) Florin forest after antropogenic disturbance in the Valdivian Costal Range, Chile Gayana Botánica SZEJNER,PAUL; LE QUESNE,CARLOS; GONZÁLEZ,MAURO E; CHRISTIE,DUNCAN A. The loss and decline of one ecosystem can be triggered by continuous changes in structure made by frequent and/or severe disturbances. Therefore we quantify the structural losses and the posteriori recovery after man-made disturbances of two fragments of P. uviferum in the Reserva Nacional Valdivia (RNV; 40°S) by studying the evidence of human disturbance and forest structure. Our results indicate frequent burned trees and stumps, indicating that slash and burn are the main factor shaping the present structure of these forest fragments. In both cases 86% of the basal area was represented by dead tress, and 14% of basal area by living individuals. The results show a severe past disturbance and the recovery of those P. uviferum forests by the abundant... Tipo: Journal article Palavras-chave: Ciprés de las Guaitecas; Alerce; Deforestation; Natural regeneration; Southern flora; Cordillera de la Costa. Ano: 2011 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-66432011000200010 Registros recuperados: 2 Primeira ... 1 ... Última

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