Martínez Carretero, Eduardo
  Vegetación de los andes centrales de la Argentina. El Valle de Uspallata, Mendoza. / E. Martinez Carretero
  En: Boletín de la Sociedad Argentina de Botánica / Sociedad Argentina de Botánica (SAB). -- Vol. 34, no. 3-4 (feb, 2000). -- [s.l.] : Sociedad Argentina de Botánica (SAB), 2000

  mapas; graf., diagr., tbls.

  High Central Andean vegetation of Argentina. Uspallata valley, Mendoza. In the frame of the central Andean vegetation of Argentina, the vegetation of Uspallata was phytosociologically and chrolologically analysed. The Uspallata valley is of tectonic origin and is limited by the Frontal Cordillera in the west and the Precordillera in the East. The most arid sector is the valley itself with an annual rainfall of 100 mm, which increases towards the East and mainly towards the west inthe high crests. However, the valley is the only cultivated sector because of the great availability of water for irrigation, mainly supplied by the Uspallata and San Alberto streams. The presence of xerophytic thickets was determined in the valley (Larrea cuneifolia Cav.) and in the higher parts of the mountain sector (Adesmia horrida Hook. et Arn.). The latter is xerophytic due to freezing of soil water. The mesophytic thickets of Artemisia mensozana DC is located between both vegetation levels. Communities of Dolichlasium lagascae Gill. ex Don and Guindilia dissecta (Cov. et Burk.) Hunz. appear in the fissures of rocky outcrops there which correspond to the sunny and shady spots respectively. Riparian vegetation, principally bushes of Proustia cuneifolia D. Don fa. mendocina (Phil.) Ariza and forests of Discaria trinervis (H. et A.) Reiche are found along streams, which are either permanent or temporary. Associated with these streams are swampy communities, xerophytes with Cortaderia rudiuscula Stapf. enmend. Acevedo, hygrophytes with Juncus balticus Willd. and hydrophytes with Rorippa nasturtiumaquaticum (L.) Hayek. The chorological types used follow Cabrera (1976). In each community the presence and cover percentages of each chorological type were calculated, drawing the respective spectra; interesting relations between chorology and cover were found in them. For example in the dry community of Stipa chrysophylla var. crispula Parodi the Puna elements dominate, while due to its cover this grassland corresponds to the high Andean phytogeographic province; and in the Cortaderia rudiuscula community which shows majority of Monte species but Patagonian physiognomy. The analysis was completed with the vegetation map of the area.
  ISSN: 0373580X

  1. ARGENTINA; 2. FLORA; 3. VEGETACION

  (62) Inv.: 02-R05873 S.T.: AR-B/4 v 34 no 3-4 ej.1

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U. Info.	Inventario	S.T. / Ubicación
IBONE	02-R05873	AR-B/4 v 34 no 3-4 ej.1