SciELO - Scientific Electronic Library Online

vol.46 issue3-4Cyanobacteria of the San Roque reservoir (Córdoba, Argentina)Leaf ecoanatomy of trees and shrubs from Chacoan Occidental and Serrano Districts (Argentina) author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Boletín de la Sociedad Argentina de Botánica

On-line version ISSN 1851-2372


AMAIDEN, M. Andrea  and  GARI, E. Noemí. Periphyton in a run mesohabitat of a mountain stream: seasonal dynamics related to physicochemical parameters. Bol. Soc. Argent. Bot. [online]. 2011, vol.46, n.3-4, pp. 235-250. ISSN 1851-2372.

Composition and distribution of periphytic algae in a run mesohabitat of the stream Achiras, southwest of Rio Cuarto, Cordoba, were analyzed seasonally during 2005-2006. Three sites were selected for sampling in the longitudinal gradient of a mountainous and piedmont area, where the construction of a dam is considered. This research provides the first results on the algal periphytic community and lays the groundwork for a deepening future. A total of 267 taxa were identified, the class Bacillariophyceae contributed with 174 taxa, Chlorophyceae with 78 and Cyanophyceae with 15. The maximum similarity between samples was 100%, corresponding to sites 1 and 2 during the spring. The highest average density was 320.486 in site 3 during summer. The classification of samples separated two main groups and formed subgroups. The CCA, which was performed considering samples and species, showed a separation of site 3 located in the piedmont, with higher percentage of small size sediment and less speed flow, regarding the others. Sites 1 and 2 were interpreted, in general, by a pH gradient. All groups formed by the classification were integrated mostly by organisms of Biraphidales order.

Keywords : Periphyton; Stream Achiras; Diatoms; Mountainous area.

        · abstract in Spanish     · text in Spanish     · Spanish ( pdf )


Creative Commons License All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License