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	Provedor de dados Phyton (3) Autor Busso,CA (3) Giorgetti,HD (3) Montenegro,OA (3) Rodríguez,GD (2) Bentivegna,D (1) Bóo,RM (1) Elia,OR (1) Mayor,MD (1) Peláez¹,DV (1) Rodríguez,HD (1) Torres,YA (1) Mais... Palavra-chave Argentina (1) Argentina grasslands (1) Controlled fire (1) Desirable grasses (1) Leymus cinereus cv. "Trailhead" (1) Monte region (1) Osmotic adjustment (1) Patagonia (1) Perennial grasses (1) Rangeland disturbances (1) Species richness and diversity (1) Undesirable woody species (1) Water stress (1) Mais... Tipo do documento Info:eu-repo/semantics/article (3) Ano 2010 (2) 2004 (1) País Argentina (3) Idioma Inglês (3)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 3 Primeira ... 1 ... Última Vegetation response to a controlled fire in the Phytogeographical Province of the Monte, Argentina Phyton Peláez¹,DV; Giorgetti,HD; Montenegro,OA; Elia,OR; Rodríguez,GD; Bóo,RM; Mayor,MD; Busso,CA. Fire is a major ecological process within most terrestrial ecosystems. Therefore, understanding the vegetation response to fire is essential to its management. Our objective was to study the effect of a controlled fire, conducted at the end of summer season, on cover and density of the most common woody and herbaceous species in Phytogeographical Province of the Monte, Argentina. In general, after the control fire, the woody species mean percentage cover was significantly lower (p<0.05) in the fire treatment than in the control (no controlled fire). This effect was persistent during the study period. No significant differences (p&gt;0.05) were detected in woody species mean density among treatments throughout the whole study. Desirable perennial... Tipo: Info:eu-repo/semantics/article Palavras-chave: Controlled fire; Desirable grasses; Undesirable woody species; Monte region; Argentina. Ano: 2010 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572010000200009 Perennial grass species richness and diversity on Argentine rangelands recovering from disturbance: (with 3 figures &#38; 5 tables) Phyton Busso,CA; Giorgetti,HD; Montenegro,OA; Rodríguez,GD. The influence of types of disturbance (hereon referred to as treatments) on natural vegetation was determined on richness and diversity of perennial grasses in semiarid rangelands of Argentina (40° 39'S, 62° 54'W). Studies were performed in adjacent areas which received different treatments: (1) untreated control; (2) burning; (3) herbicide application (shrub control); (4) Old Field 1 or (5) Old Field 2 (areas previously subjected to mechanical soil disturbance for 25 years; Old Field 1 had been exposed to a more severe grazing than Old Field 2 previous to cropping); and (6) overgrazing. During 1984-1992, annual aboveground biomass was determined per perennial grass species within each treatment after clipping permanent plots (n=30). Grass species richness... Tipo: Info:eu-repo/semantics/article Palavras-chave: Argentina grasslands; Rangeland disturbances; Perennial grasses; Species richness and diversity. Ano: 2004 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572004000100002 Osmotic adjustment in Leymus cinereus cv. "Trailhead" under field conditions Phyton Torres,YA; Busso,CA; Montenegro,OA; Giorgetti,HD; Rodríguez,HD; Bentivegna,D. Osmotic adjustment has been recognized to be an important adaptive response to water stress in higher plants. Although Leymus cinereus cv. "Trailhead" is reputedly a very drought-tolerant rangeland plant, its ability to adjust osmotically in the field has not previously been reported. This study examined the occurrence or not of osmotic adjustment in field-grown plants of Leymus cinereus cv. "Trailhead" during late spring in an arid zone of Patagonia. Plants of this species had been established in the field three years before. With this purpose, leaf laminae of this species were collected and pressure-volume curves made. Results showed turgor maintenance in the face of declining leaf water potentials (i.e., osmotic adjustment) in the study species. Even... Tipo: Info:eu-repo/semantics/article Palavras-chave: Osmotic adjustment; Leymus cinereus cv. "Trailhead"; Water stress; Patagonia. Ano: 2010 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572010000200013 Registros recuperados: 3 Primeira ... 1 ... Última

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