Influencia de la sabina (juniperus thurifera) sobre el estrato herbaceo en función de la orientación
ISSN: 1138-3399, 1989-2128
Any de publicació: 1988
Número: 15
Pàgines: 179-189
Tipus: Article
Altres publicacions en: Anales de biología
Resum
The effect of Juniperus thurifera on its nearest herbaceous layer has been studied. Samplings have been canied out from the bottom of ten trees taken at random, with 25 cm side squares in the four principal directions. Data have been compared by affinity and principal components factorial analisys. u and y diversity have been determinated too. Homogeneity is higher in the specific composition close to the tree with few dominant species adapted to the special conditions created by trees. Mainly, these species are Bromus erectus, and Brachypodium pinnatum subsp. rupestre. As distance to the tree increases, this effect decreases and diversity rises up. This increase is generaly progresive since the firts samplings. Northerm results show the importance of tree shadow effect on the herbaceous layer.