2012
DOI: 10.1590/s1676-06032012000200005
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Zooplankton richness, abundance and biomass of two hypertrophic shallow lakes with different salinity in central Argentina

Abstract: The zooplankton of lakes is controlled by biological and physico-chemical parameters. Among the former, predation by fish can determine the replacement of large-sized species by small-sized ones and among the latter, salinity exerts negative effects on richness and abundance. Since it has been suggested that saline lakes without fishes have higher zooplankton biomass than low salinity ones, the aim of this study was to determine the richness, abundance and biomass of zooplankton in two lakes with different sal… Show more

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Cited by 20 publications
(16 citation statements)
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References 27 publications
(45 reference statements)
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“…La elevada con-centración de Clo-a y los valores obtenidos a través del índice de estado trófico de Carlson, reflejan el carácter eutrófico de la laguna Sauce Grande, lo cual también se evidencia a través del contenido de nutrientes en dicho cuerpo de agua. La riqueza específica resultó baja en la laguna Sauce Grande, similar a lo mencionado para otros lagos hipohalinos de la región (Echaniz et al 2012, Vignatti et al 2012b. De los siete taxa registrados, dos especies de copépodos (B. poopoensis y A. robustus) y una de cladócero (M. micrura) resultaron dominantes y representativas de la comunidad.…”
Section: Discussionunclassified
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“…La elevada con-centración de Clo-a y los valores obtenidos a través del índice de estado trófico de Carlson, reflejan el carácter eutrófico de la laguna Sauce Grande, lo cual también se evidencia a través del contenido de nutrientes en dicho cuerpo de agua. La riqueza específica resultó baja en la laguna Sauce Grande, similar a lo mencionado para otros lagos hipohalinos de la región (Echaniz et al 2012, Vignatti et al 2012b. De los siete taxa registrados, dos especies de copépodos (B. poopoensis y A. robustus) y una de cladócero (M. micrura) resultaron dominantes y representativas de la comunidad.…”
Section: Discussionunclassified
“…Esta situación coincide con lo ya indicado por Alfonso (2013) en un estudio restringido a los meses del otoño de 2010, en el cual se observa la dominancia de los cladóceros en marzo y como fue cambiando esa dominancia gradualmente por los copépodos hacia el mes de mayo. Las abundancias registradas en la laguna Sauce Grande fueron menores a las mencionadas para otros cuerpos de agua hipohalinos de la región (Echaniz et al 2009, Arora & Mehra 2009, Echaniz et al 2012. Se destaca la presencia de B. poopoensis, especie característica en cuerpos de agua de salinidad elevada, coexistiendo con especies típicas de baja salinidad (e.g.…”
Section: Discussionunclassified
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“…In the present study, most of the detected zooplankton taxa were freshwater species. Nevertheless, many of them have also been detected in saline lakes, for example, 36,37 , which means that many zooplankton taxa in Bosten Lake have a good adaptability to salinization. Furthermore, the negative relationship between microfauna community and salinity levels in lakes may be driven by one particularly diverse or dominant taxonomic group which constitutes a significant proportion of the species in a system 38 .…”
Section: Discussionmentioning
confidence: 99%
“…In the absence of fish predation that may exclude it from aquatic ecosystems, it has been determined that its large size and high filtration efficiency endow it with a high grazing rate for phytoplankton. This means that the lakes it inhabits will be clear, with low chlorophyll-a concentrations and high water transparency [11], despite being hypertrophic [8,17]. In the case of the genus Moina, halophilic species are more common, such as M. mongolica whose distribution extends from northern Africa, eastern and central Europe to Mongolia [18], M. salina with a circummediterranean distribution [18,19], M. baylyi in Australia [18] and M. hutchinsoni in North America [20].…”
Section: Introductionmentioning
confidence: 99%