Excursiones Botánicas - Patagonia

Nahuel Huapi National Park - Patagonia Argentina. Sus ambientes y vegetación

Nahuel Huapi National Park covers approximately 710.000 hectares and is the second largest in the Argentine Republic.
It occupies the northern part of the Patagonian Andes.
Owing to sharp rainfall and temperature gradients, the vegetation covering this mountainous region comprises a great veriety of different types. The former factor is the result of the predominant winds from the Pacific: from West to East, the average yearly rainfall drops from 3500 to 600 mm.
The temperature gradient is inversely related to altitude, a fall of some 6% per 100 meters.
The local lake level is 760 m.a.s.l. and rises to roughly 2.200 m in the main mountainous areas.
Some of the main vegetation units are:

Variación de la Vegetación con la Altitud Bosques Xerófilos de Ciprés Estepa Patagónica Matorrales de Ñire

Valdivian jungle to the west of the Park
Evergreen coihue woods (Nothofagus dombeyi) forest by the lakes.
Semidesertic units above 1700 m.a.s.l., among others.
Ñires forests and shrub communities (Nothofagus antartica) in valley bottoms and disturbed areas.
The arid Patagonian steppe to the east
Deciduous lengas forests and shrub communities (Nothofagus pumilio) situated above 1000 mts over sea level
Cipres de la Cordillera (Autrocedrus chilensis) in transitional zones between coihues forests and the steppe.