Composición florística de praderas altoandinas de la zona de Lonquimay (IX Región, Chile)
Composición florística de praderas altoandinas de la zona de Lonquimay (IX Región, Chile)
Authors
Hauenstein Barra, Enrique
Palma, Rodrigo
González Arratia, Marcos
Ahumada, Mario
Palma, Rodrigo
González Arratia, Marcos
Ahumada, Mario
Authors
Date
2012-08-14
Datos de publicación:
Agro sur, Vol.31, N°1, 8-20, 2003
Keywords
Veranadas - Praderas altoandinas
Collections
Abstract
Con el objeto de conocer la composición florística de praderas altoandinas de la comuna de Lonquimay, en siete sectores de “veranadas” se realizaron colectas intensivas e inventarios vegetacionales de acuerdo a la metodología fitosociológica europea.
Se determinaron 117 especies, que se distribuyen en un pteridófito, una gimnosperma y 115 angiospermas. De éstas, 19,7 % son introducidas, lo cual indica que el grado de perturbación antrópica es relativamente bajo, a pesar del aparente deterioro por exceso de pastoreo que se aprecia en algunas de estas veranadas. Asimismo, las formas de vida más importantes corresponden a hemicriptófitos, nanofanerófitos y terófitos, lo que guarda relación con las condiciones climáticas de la zona.
Desde el punto de vista vegetacional, en el área de estudio predominan dos grandes formaciones herbáceas: la estepa o coironal y la pradera húmeda o mallín. De éstas, el coironal es más rico en especies y el mallín posee las de mayor valor forrajero.
The objective of the study was to determine the floristic composition of high Andes pastures in the sector of Lonquimay. In seven summer pastures , intensive collections and inventories of the vegetation were conducted using the European phytosociological method. A total of 117 species were observed, including a pteridophyte, a gymnospermae and 115 angiospermae. Of these, 19,7% are introduced species, demonstrating that there has been a relatively low degree of anthropic alteration, despite the evident deterioration due to overgrazing in some of these areas. The most important life forms observed were hemicryptophytes, nanophanerophytes and terophytes, which would be related to the climatic conditions of the zone. From the vegetation point of view, two large herbaceous formations were predominant in the area of the study: the steppe or “coironal” and the wet prairie or “mallín”. The coironal was very rich in species and the mallín had the highest forage value.
The objective of the study was to determine the floristic composition of high Andes pastures in the sector of Lonquimay. In seven summer pastures , intensive collections and inventories of the vegetation were conducted using the European phytosociological method. A total of 117 species were observed, including a pteridophyte, a gymnospermae and 115 angiospermae. Of these, 19,7% are introduced species, demonstrating that there has been a relatively low degree of anthropic alteration, despite the evident deterioration due to overgrazing in some of these areas. The most important life forms observed were hemicryptophytes, nanophanerophytes and terophytes, which would be related to the climatic conditions of the zone. From the vegetation point of view, two large herbaceous formations were predominant in the area of the study: the steppe or “coironal” and the wet prairie or “mallín”. The coironal was very rich in species and the mallín had the highest forage value.