ISSN:
1573-5052
Keywords:
Cellularity
;
Central Argentina
;
Equipotentiality
;
Geomorphological gradient
;
Indication
;
Multivariate analysis
;
Vectoriality
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Abstract The spatial variation of grasslands in the Cordoba Mountains was studied according to geographical criteria used by Solntsiev (1974): the homogeneity of the vegetation over large areas ‘equipotentiality’ is related to lithology. Grassland heterogeneity analysis, description of community variability, and detection of indicators are performed on both geomorphological slope gradients ‘vectoriality’, and at discontinuities found along these gradients ‘cellularity’. Tertiary sediment and loess areas give rise to undulating reliefs with homogeneous slopes and obviously continuous vegetation variation gradients from the upper to the lower slope zones. Occasionally, dispersed patches of tall grasses (Paspalum quadrifarium) occur in the pastures, introducing cellular variations in the vegetation structure. On gneiss, on the other hand, complex mosaics of pastures predominate, associated with edaphic discontinuities, caused by different soil depths and by local erosion processes. In this case the vegetation variation between the upper and lower slope zones is not clear.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00036514
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