000			02955nab a2200229 a 4500
003			AR-ReUNN
005			20260702003425.0
008			260630s2007 ag |||||||||||||||||spa
100	1		_aMartínez Carretero, Eduardo _9154542
245	1	0	_aVegetación de los andes centrales de la Argentina. El Valle de Uspallata, Mendoza. / E. Martinez Carretero
264		1	_c2007
300			_a22 páginas
500			_amapas; graf., diagr., tbls.
520			_aHigh 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.
650		4	_aFlora _92055
650		4	_aArgentina _94258
650		4	_aVegetación _95746
773	0		_tBoletín de la Sociedad Argentina de Botánica _x0373-580X _gv. 34 n. 3-4 (2000) _w238707
942			_cART
035			_a(IBONE)44505
001			242251
999			_c242251 _d242251
040			_aAR-ReUNN _bspa _cAR-ReUNN _eaacr2