INVESTIGADORES
MARTINEZ CARRETERO Eduardo Enrique
artículos
Título:
Spatial distribution of Tephrocactus aoracanthus (Lem.) Lem. in relation to shrubs in the hyperarid regions of west-central Argentina
Autor/es:
ALMIRÓN, M.; E. MARTINEZ CARRETERO
Revista:
AUSTRAL ECOLOGY
Editorial:
WILEY-BLACKWELL PUBLISHING, INC
Referencias:
Lugar: Londres; Año: 2013 vol. 38 p. 131 - 138
ISSN:
1442-9985
Resumen:
The spatial intraspecific and interspecific distribution of Tephrocactus aoracanthus (Lem.) Lem. was
studied using univariate and bivariate point pattern analysis, at landscape scale in four different physiographic units
and at microscale in terms of the shrubs found in those units.The influence of shrubs on photosynthetically active
radiation and on soil temperature under their canopies was analysed. Results show a high environmental variability
in light and temperature under shrubs that generally has no influence on the distribution of T. aoracanthus.
Apparently, this cactus has great ability to adapt to different conditions of both photosynthetically active radiation
and temperature. However, intraspecific distribution was highly clustered in all physiographic units, independently
of bushes. Possibly, the mode of seed dispersal and the rooting of cladodes at small scale are the main processes that
determine the strong intraspecific clustering of T. aoracanthus.