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  Daily fluctuation in rotifer population abundance in two environments of the upper Paraná River floodplain, Brazil

Bonecker, C. C., Lansac-Tôha, F. A., Bini, L. M., & Velho, L. F. M. (2002). Daily fluctuation in rotifer population abundance in two environments of the upper Paraná River floodplain, Brazil. Amazoniana: Limnologia et Oecologia Regionalis Systematis Fluminis Amazonas, 17(1/2), 139-151.

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Item Permalink: https://hdl.handle.net/21.11116/0000-0004-97BD-D Version Permalink: https://hdl.handle.net/21.11116/0000-0004-97BE-C
Genre: Journal Article

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 Creators:
Bonecker, Claudia C.1, Author
Lansac-Tôha, Fábio A.1, Author
Bini, Luis M.1, Author
Velho, Luiz Felipe M.1, Author
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1External Organizations, ou_persistent22              

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 Abstract: Daily fluctuation of rotifer population abundance was studied in a lake and in a river of the Upper Paraná
River floodplain. Samples were collected in the open water for 14 consecutive days, in the high and low
water periods. Densities were higher in the lake, chiefly in the low water period. During the studied period,
changes in species dominance were observed. Rotifer abundance showed that higher variability occurred
during the high water period in both environments. Rotifer abundance showed high variability in the river
during the sampling days. In the lake, fluctuation was related to the hydrological periods. Rotifer abundance fluctuations in the lake were influenced by regional factors (fluviometric level); and in the river by
local factors (flow). The sampling design pointed out that seasonal samples are necessary to evaluate
rotifer abundance in the lake. However, this is not the case in the river where seasonal differences in abundance were not observed.

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Language(s): eng - English
 Dates: 2002-12
 Publication Status: Issued
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Title: Amazoniana: Limnologia et Oecologia Regionalis Systematis Fluminis Amazonas
  Other : Amazoniana
Source Genre: Journal
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Publ. Info: Kiel : Kommissions-Verlag W.G. Mühlau
Pages: - Volume / Issue: 17 (1/2) Sequence Number: - Start / End Page: 139 - 151 Identifier: ISSN: 0065-6755
CoNE: https://pure.mpg.de/cone/journals/resource/954925458030