2007
DOI: 10.1590/s1519-69842007000100008
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Abundance and diversity of phytoplankton in the Paraná River (Argentina) 220 km downstream of the Yacyretá reservoir

Abstract: Patterns in the temporal composition, abundance and diversity of the phytoplankton community of the Paraná river prior to and after the initial filling phase of the Yacyretá reservoir are analyzed. The study site is located 220 km downstream from the Yacyretá reservoir and 30 km downstream from the confluence with the Paraguay river. Because both rivers remain separate and unmixed at the study site, we compared the possible effects of the impoundment on both river banks (left and right banks) in hydrological p… Show more

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Cited by 46 publications
(23 citation statements)
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“…As far as zooplankton are concerned, the sampling was obtained from the main river channels and from upstream zones of the reservoir, all of these with water retention time (WRT) longer than 15 days (see AGOSTINHO et al 2007, ZALOCAR DE DOMITROVIC et al 2007, BOLTOVSKOY et al 2013, which is considered as the lower time threshold for the development of a copepod life cycle (RIETZLER et al 2002). The approximate WRT of Figure 1.…”
Section: Methodsmentioning
confidence: 99%
“…As far as zooplankton are concerned, the sampling was obtained from the main river channels and from upstream zones of the reservoir, all of these with water retention time (WRT) longer than 15 days (see AGOSTINHO et al 2007, ZALOCAR DE DOMITROVIC et al 2007, BOLTOVSKOY et al 2013, which is considered as the lower time threshold for the development of a copepod life cycle (RIETZLER et al 2002). The approximate WRT of Figure 1.…”
Section: Methodsmentioning
confidence: 99%
“…Domitrovic & Maidana, 1997). Cyanobacteria presented maximum density only in spring and summer, when hydrometric levels were lower than 3.50, and they were represented by Cylindrospermopsis raciborskii, Planktolyngbya subtilis and Dolichospermum spiroides, without obvious formation of blooms (Zalocar de Domitrovic, Poi de Neiff, & Casco, 2007b). Microcystis aeruginosa was below the detection limits of the counting method, and it appeared sporadically in concentrated samples collected with plankton meshes (Zalocar de Domitrovic & Forastier, 2007.…”
Section: Cyanobacterial Abundancementioning
confidence: 99%
“…A total of 500 -600 frustules per sample (depending on the abundance of diatoms) were identified and counted using the phase contrast light microscope (1000 X). The diatoms were identified to species level based on studies by Mizuno 1964;Patrick & Reimer 1966a, b;Bourrelly 1981;Lobo et al, 1996;John, 2000;Biggs & Kilroy 2000;Oliveira et al, 2001;Lobo et al, 2002;Lobo et al, 2004;Bicudo & Menezes 2006;Salomoni et al, 2006;Delgado et al, 2007;Moura et al, 2007;Soares et al, 2007;Zalocar de Damitrovic et al, 2007 and the website of the Phycology Section of The Academy of Natural Sciences of the USA (http://diatom.acnatsci.org).…”
Section: Laboratory Analysismentioning
confidence: 99%