NDLI: O regime hidrológico do rio Ivinhema (Estado do Mato Grosso do Sul) e sua influência na assembléia zoobentônica

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O regime hidrológico do rio Ivinhema (Estado do Mato Grosso do Sul) e sua influência na assembléia zoobentônica

Content Provider	Semantic Scholar
Author	Arenas-Ibarra, José Antonio Takeda, Alice Michiyo Fujita, Daniele Sayuri
Copyright Year	2012
Abstract	This study was developed in different environments of the Ivinhema river floodplain in order to analyze the spatial and temporal variation of benthic assemblages and their relationship with physical and chemical variables and water level. Samples were taken quarterly between February and November 2002 in four environments: Ivinhema main channel, Ipoita channel, Patos lake (with direct connectivity) and Ventura lake (without connectivity). The system was characterized by a bimodal potamophase cycle with moderate intensities and large amplitudes, remaining in potamophase for 184 days in 2001 and 67 days in 2002. Physical and chemical parameters, summarized in a PCA, showed spatial and temporal variation. Moderate intensity and great width pulses were recorded. Physicochemical variables changed spatially and temporally. Nematoda, Corbiculidae, Oligochaeta, Acari, Ostracoda and Chironomidae were the most abundant taxa registered and the larvae of Chironomidae were the most predominant in the Ivinhema main channel, Ipoita channel and Ventura lake. Total density changed between months, but the analysis of the structure of the assembly (CA) showed that the benthic assembly of the Ivinhema main channel is dissimilar to the ponds. The relationship between PCA and CA was not significant, indicating that the Ivinhema system had a complex structure and that the spatial uniformity of density and temporal uniformity of benthic assemblage is due to the greater connectivity between the sites.
Starting Page	47
Ending Page	57
Page Count	11
File Format	PDF HTM / HTML
DOI	10.4025/actascibiolsci.v34i1.6481
Volume Number	34
Alternate Webpage(s)	http://eduem.uem.br/ojs/index.php/ActaSciBiolSci/article/download/6481/pdf
Alternate Webpage(s)	https://doi.org/10.4025/actascibiolsci.v34i1.6481
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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