Assessment of the urbanization effect on a lake by zooplankton |
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| Authors: | S Pecorari S José de Paggi J C Paggi |
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| Institution: | (1) Escuela de Sanidad, Facultad de Bioquímica y Ciencias Biológicas, Universidad Nacional del Litoral, 3000, Santa Fe Argentina;(2) Instituto Nacional de Limnologia (CONICET-UNL) Macia 1933, 3016 Santo Tomé, Argentina |
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| Abstract: | The present study was aimed at comparing zooplankton composition and abundance between the western shore of the shallow lake
Setúbal, on which the city of Santa Fe is founded, and the eastern shore, whose environmental impact is scarce or null. Five
samplings were carried out in 14 stations, under different seasonal conditions, hydrometric levels, and volumes of previous
rainfalls. The values of conductivity, pH, transparency, specific richness, and abundance of macro and microzooplankton showed
significant differences between both shores. The highest zooplankton density, with a proportion of Bdelloid rotifers of up
to 20% of the total abundance, was associated with the urbanization of the impacted shore. The volume of the lake and its
fast turnover rate would buffer the impact of contamination, as indicated by a certain degree of eutrophication, which is
more evident at lower hydrometric levels and higher temperatures.
Published in Russian in Vednye Resursy, 2006, Vol. 33, No. 6, pp. 728–736.
The article was translated by the author. |
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