Zooplankton-population dynamics in the Salado-River basin (Buenos Aires, Argentina) in relation to hydraulic works and resulting wetland function

The construction of drainage canals in the upper stretch of the Salado River has caused the input of salty waters into the basin, with unexplored consequences on zooplankton dynamics and reproduction. To determine the consequences of those anthropic interventions, zooplankton samples were taken unde...

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Detalles Bibliográficos
Autores principales: Bazzuri, María Elisa, Gabellone, Néstor Adrián, Solari, Lía Cristina
Formato: Articulo
Lenguaje:Inglés
Publicado: 2020
Materias:
Zoología
Zooplankton
Lowland river
Drainage channels
Brachionus plicatilis
Egg ratio
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/137524
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-137524
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Zoología
Zooplankton
Lowland river
Drainage channels
Brachionus plicatilis
Egg ratio
spellingShingle Zoología
Zooplankton
Lowland river
Drainage channels
Brachionus plicatilis
Egg ratio
Bazzuri, María Elisa
Gabellone, Néstor Adrián
Solari, Lía Cristina
Zooplankton-population dynamics in the Salado-River basin (Buenos Aires, Argentina) in relation to hydraulic works and resulting wetland function
topic_facet Zoología
Zooplankton
Lowland river
Drainage channels
Brachionus plicatilis
Egg ratio
description The construction of drainage canals in the upper stretch of the Salado River has caused the input of salty waters into the basin, with unexplored consequences on zooplankton dynamics and reproduction. To determine the consequences of those anthropic interventions, zooplankton samples were taken under four hydrologic conditions (high water, mean flows, low flows, very low flows) in the canals and the river watercourse. Environmental variables were measured in situ (pH, temperature, conductivity, turbidity, flow velocity, water level, dissolved-oxygen concentration) and in the laboratory (chlorophyll a, nutrients). A total of 166 zooplankton taxa was identified, among which rotifers and ciliates were the most diverse and abundant. A redundancy analysis indicated temperature, conductivity, and water discharge to be the main constraints to zooplankton development. Accordingly, abundance peaks were recorded during mean and low flows in the spring and summer, and minimum values during high water (autumn–winter floodings). The dominant species, Brachionus plicatilis s.l., recorded outstanding densities at ca. 34,800 ind L–1—that figure representing a worldwide novelty—during low flows in the canals and at the river downstream site. The wetlands and shallow lakes in the study area acted as sources of inocula for the river, increasing the total abundance of zooplankton, gravid females, nauplii, copepodites, juveniles, and total number of eggs being carried at the second river site downstream from the canals’ discharges. The presence of diverse habitats coupled with the alternation of hydrologic conditions have resulted in the development of a very rich, complex zooplankton community.
format Articulo
Articulo
author Bazzuri, María Elisa
Gabellone, Néstor Adrián
Solari, Lía Cristina
author_facet Bazzuri, María Elisa
Gabellone, Néstor Adrián
Solari, Lía Cristina
author_sort Bazzuri, María Elisa
title Zooplankton-population dynamics in the Salado-River basin (Buenos Aires, Argentina) in relation to hydraulic works and resulting wetland function
title_short Zooplankton-population dynamics in the Salado-River basin (Buenos Aires, Argentina) in relation to hydraulic works and resulting wetland function
title_full Zooplankton-population dynamics in the Salado-River basin (Buenos Aires, Argentina) in relation to hydraulic works and resulting wetland function
title_fullStr Zooplankton-population dynamics in the Salado-River basin (Buenos Aires, Argentina) in relation to hydraulic works and resulting wetland function
title_full_unstemmed Zooplankton-population dynamics in the Salado-River basin (Buenos Aires, Argentina) in relation to hydraulic works and resulting wetland function
title_sort zooplankton-population dynamics in the salado-river basin (buenos aires, argentina) in relation to hydraulic works and resulting wetland function
publishDate 2020
url http://sedici.unlp.edu.ar/handle/10915/137524
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