SciELO - Scientific Electronic Library Online

vol.2 número1Corotipos preliminares de Perú basados en la distribución de la familia Asteraceae índice de autoresíndice de materiabúsqueda de artículos
Home Pagelista alfabética de revistas  

Servicios Personalizados




  • No hay articulos citadosCitado por SciELO

Links relacionados


Darwiniana, nueva serie

versión impresa ISSN 0011-6793versión On-line ISSN 1850-1699


BATISTA, William B. et al. Las comunidades vegetales de La Sabana del Parque Nacional El Palmar (Argentina). Darwiniana, nueva serie [online]. 2014, vol.2, n.1, pp.5-38. ISSN 0011-6793.

Savanna plant community types at El Palmar National Park (Argentina). Since 1965, El Palmar National Park, Entre Ríos, protects the largest remnant of Butia yatay palm savanna, a species-rich ecosystem threatened by human activity. To study the functioning of this ecosystem and to manage its preservation, it is necessary to have an adequate picture of its vegetation heterogeneity. In this paper, we present a phytosociological classification of the plant communities of this savanna, describe their structure, species composition and richness, and provide their distribution in the landscape. To stratify our data acquisition, we first mapped the major geomorphic units in this landscape. In the spring of 1999 and the following summer, we conducted complete inventories of plant species in 73 savanna stands with different fire histories distributed throughout the different geomorphic units. We used multivariate analysis and numerical classification techniques to group inventories in plant community types and species in floristic groups. Finally, we summarized the compositional differences among community types as a metric multidimensional scaling ordination. We defined seven community types, recognizable by combinations of 20 floristic groups. The pattern of similarities among these community types suggests that floristic heterogeneity is organized along two gradients, one associated with soil texture differences, and the other with differences in water input. Three of the community types, closely related to each other, are distributed on elevated fluvial terraces and interfluves, in correspondence with gradual differences in topography and soil. These community types undergo successional change due to woody encroachment triggered by cattle exclusion and maintained by scarcity of natural fires. The remaining four community types are strictly associated with rocky outcrops, sand deposits, or runoff pathways that interrupt the landscape matrix, with no apparent woody encroachment.

Palabras clave : Butia yatay; Conservation ecology; Geology; Geomorphology; Landscape; Multidimensional scaling; Numerical classification; Phytosociology; Species richness.

        · resumen en Español     · texto en Español


Creative Commons License Todo el contenido de esta revista, excepto dónde está identificado, está bajo una Licencia Creative Commons