Repositorio Institucional
Repositorio Institucional
CONICET Digital
  • Inicio
  • EXPLORAR
    • AUTORES
    • DISCIPLINAS
    • COMUNIDADES
  • Estadísticas
  • Novedades
    • Noticias
    • Boletines
  • Ayuda
    • General
    • Datos de investigación
  • Acerca de
    • CONICET Digital
    • Equipo
    • Red Federal
  • Contacto
JavaScript is disabled for your browser. Some features of this site may not work without it.
  • INFORMACIÓN GENERAL
  • RESUMEN
  • ESTADISTICAS
 
Artículo

Zooplankton and their driving factors in a large subtropical river during low water periods

Jose, Susana BeatrizIcon ; Devercelli, MelinaIcon ; Rojas Molina, Florencia MercedesIcon
Fecha de publicación: 04/2014
Editorial: E Schweizerbartsche Verlags
Revista: Fundamental and Applied Limnology
ISSN: 1863-9135
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Otras Ciencias Biológicas

Resumen

The composition, abundance and functional diversity of zooplankton from the main channel of the Middle Paraná River were studied. Monthly samples were collected in both ordinary drought periods (1977, 1978, 1981, 2007) and extraordinary drought ones (La Niña events 1971–1972, 1999–2000). A constant pattern of zooplankton structure was recorded from 1971 to 1981 characterised by a strong rotifer dominance. Changes were observed in the last two periods, with the planktonic larvae of Limnoperna fortunei as a new component of zooplankton. The abundance of zooplankton showed a significant interannual variability and a decreasing trend over time with the maximum values almost 100 times lower from 1999 onwards, mainly resulting from a decline in rotifer density. Cladocerans and copepods occurred with very low abundance and were similar across years. Bosmina and Bosminopsis showed a decreasing trend through time. Evidence was found of intrazooplanktonic competition between rotifers and cladocerans. Zooplankton and phytoplankton abundance presented similar trends, but the edible algal fraction (< 20 μm) showed a negative relation with Bosminidae, suggesting cladoceran control. In the last period, zooplankton changes were not associated with physical parameters (except flow velocity), nutrients or phytoplankton. The absence of a constant pattern and the causes of the declining trend of zooplankton abundance over time could be related to biotic interactions and multiple-stressors throughout the study.
Palabras clave: Long-Term Study , Microphagous Rotifers , Phytoplankton , Selective Filter Feeding Cladocerans , Zooplankton Abundance
Ver el registro completo
 
Archivos asociados
Tamaño: 1.043Mb
Formato: PDF
.
Solicitar
Licencia
info:eu-repo/semantics/restrictedAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)
Identificadores
URI: http://hdl.handle.net/11336/31678
URL: http://www.schweizerbart.de/papers/fal/detail/184/82860/Zooplankton_and_their_dr
DOI: http://dx.doi.org/10.1127/1863-9135/2014/0520
URL: http://www.ingentaconnect.com/content/schweiz/fal/2014/00000184/00000002/art0000
Colecciones
Articulos(INALI) [463]
Articulos de INST.NAC.DE LIMNOLOGIA (I)
Citación
Rojas Molina, Florencia Mercedes; Devercelli, Melina; Jose, Susana Beatriz; Zooplankton and their driving factors in a large subtropical river during low water periods; E Schweizerbartsche Verlags; Fundamental and Applied Limnology; 184; 2; 4-2014; 125-139
Compartir
Altmétricas
 
Estadísticas
Visualizaciones: 131
Descargas: 0

Enviar por e-mail
Separar cada destinatario (hasta 5) con punto y coma.
  • Facebook
  • Twitter
  • Instagram
  • YouTube
  • Sound Cloud

Los contenidos del CONICET están licenciados bajo Creative Commons Reconocimiento 2.5 Argentina License

Ministerio
https://www.conicet.gov.ar/ - CONICET

Inicio

Explorar

  • Autores
  • Disciplinas
  • Comunidades

Estadísticas

Novedades

  • Noticias
  • Boletines

Ayuda

Acerca de

  • CONICET Digital
  • Equipo
  • Red Federal

Contacto

Godoy Cruz 2290 (C1425FQB) CABA – República Argentina – Tel: +5411 4899-5400 repositorio@conicet.gov.ar
TÉRMINOS Y CONDICIONES