El efecto de arroyos tributarios de menor orden sobre el perifiton de un río de llanura

Confluence zones are important places to analyze discontinuities that succeed in the river continuum, when two streams of different order link up with their collector. In this work we analyzed the periphyton composition and structure in the confluence of two mountain streams, where Chocancharava riv...

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Detalles Bibliográficos
Autores principales: Gari, N., Corigliano, M. del C.
Formato: Articulo
Lenguaje:Español
Publicado: 2006
Materias:
Ciencias Naturales
periphyton, streams, confluence, algae
Algas
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/69449
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-69449
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Español
topic Ciencias Naturales
periphyton, streams, confluence, algae
Algas
spellingShingle Ciencias Naturales
periphyton, streams, confluence, algae
Algas
Gari, N.
Corigliano, M. del C.
El efecto de arroyos tributarios de menor orden sobre el perifiton de un río de llanura
topic_facet Ciencias Naturales
periphyton, streams, confluence, algae
Algas
description Confluence zones are important places to analyze discontinuities that succeed in the river continuum, when two streams of different order link up with their collector. In this work we analyzed the periphyton composition and structure in the confluence of two mountain streams, where Chocancharava river (Cuarto river) foothill reach begins, in Córdoba province. Monthly periphyton samples were taken by scraping a known surface, in three sites located in Piedras Blancas and San Bartolomé stream confluence at 550 m a.s.l. TWINSPAN classification and sample and species ordinations by means of Canonic Correspondence Analysis (CCA) were carried out. Seventy one algae species were determined. Bacillarophyceae and Chlorophyceae presented higher species richness. Dominant species were Cocconeis placentula var. euplypta and Achnanthidium minutissimum, both exhibited an annual bimodal distribution pattern, with maximal densities in autumn and spring. CCA clusters demonstrated seasonal changes in periphyton structure. Summer species were associated to higher temperature and precipitations, and winter species (were associated) to higher conductivity and pH. The tributary of minor order, San Bartolomé stream, evidenced a wider distance in the sample grouping; its flora was different in winter months, during the phase of low water levels. From the obtained results it is concluded that at the confluence sectors the composition and structure of the higher order stream is continuous with the principal river during low water levels while, during high water levels, the periphyton of both tributaries colonize the receiving river.
format Articulo
Articulo
author Gari, N.
Corigliano, M. del C.
author_facet Gari, N.
Corigliano, M. del C.
author_sort Gari, N.
title El efecto de arroyos tributarios de menor orden sobre el perifiton de un río de llanura
title_short El efecto de arroyos tributarios de menor orden sobre el perifiton de un río de llanura
title_full El efecto de arroyos tributarios de menor orden sobre el perifiton de un río de llanura
title_fullStr El efecto de arroyos tributarios de menor orden sobre el perifiton de un río de llanura
title_full_unstemmed El efecto de arroyos tributarios de menor orden sobre el perifiton de un río de llanura
title_sort el efecto de arroyos tributarios de menor orden sobre el perifiton de un río de llanura
publishDate 2006
url http://sedici.unlp.edu.ar/handle/10915/69449
work_keys_str_mv AT garin elefectodearroyostributariosdemenorordensobreelperifitondeunriodellanura
AT coriglianomdelc elefectodearroyostributariosdemenorordensobreelperifitondeunriodellanura
bdutipo_str Repositorios
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