Zooplankton community composition and some limnological aspects of an oxbow lake of the Paraopeba River, São Francisco River Basin, Minas Gerais, Brazil

Sampaio, Édson Vieira; López, Cristiane Machado de

doi:10.1590/s1516-89132000000300007

Cited by 14 publications

(7 citation statements)

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“…A similar pattern has been recorded in the aquatic systems of white-(77%) and black-water (40%) rivers in the Amazon basin (Table 3), as well as other systems (see Green, 1972;Dumont, 1983;Neves et al, 2003;Paggi and José de Paggi, 1990;Sampaio and López, 2000).…”

Section: Discussionsupporting

confidence: 79%

A checklist for the zooplankton of the Middle Xingu – an Amazon River system

et al. 2015

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A zooplankton checklist is presented for the Middle Xingu River, based on surveys conducted at four sites in the main channel and two fluvial lakes. A total of 175 taxa are listed, including 141 rotifers, 20 cladocerans, and five copepods. Rapids presented the greatest species richness, with up to 124 taxa, while Ilha Grande lake had 70 taxa, the lowest number. Non-planktonic benthic larvae were recorded frequently in the samples.Keywords: clear water rivers, zooplankton, fluvial habitats, limnology. Diversidade zooplanctônica do médio Rio Xingu -bacia amazônica ResumoLevantamentos realizados em dois lagos e no canal principal do médio Xingu objetivaram a listar a diversidade do zooplâncton. De um total de 175 táxons, 141 foram rotíferos, 20 cladóceros e 5 copépodes. As corredeiras foram os ambientes mais diversos com 124 táxons, enquanto que no Lago da Ilha Grande se registraram somente setenta táxons. Destaca-se a ocorrência de grupos de hábito não planctônico na coluna d'água do rio que indica o efeito perturbador da correnteza.Palavras-chave: águas claras amazônicas, zooplâncton, ambientes fluviais, limnologia.

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Section: Discussionsupporting

confidence: 79%

A checklist for the zooplankton of the Middle Xingu – an Amazon River system

et al. 2015

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“…Studies carried out in floodplain water regions of the Daugava River, and Gruberts et al (2007) showed an inverse and statistically significant correlation between the water level and the general abundance of zooplankton. Thereafter, Sampaio & López (2000) emphasised the influence of high water levels of the Paraopeba River on the improvement of oxygen level in the floodplain lakes and an increase in the density and biodiversity of the Copepoda and Rotifera structure. Our studies showed that higher water levels favoured occurrence of a higher diversity of crustaceans and protozoans at the cost of a decrease in the rotifer share.…”

Section: Discussionmentioning

confidence: 99%

“…3C). A strong prevalence of one or several species preferring high biogen concentrations, often connected to a decrease in the dissolved oxygen contents, causes an elimination of many more sensitive taxa (Sampaio & López, 2000). An influence of progressive eutrophication of paleopotamic floodplain lakes on depletion of the Crustacea structure has been discussed by many researchers, including Paganelli & Sconfietti (2013) in a Topo lake on the Ticino River (Italy), as well as Illyová (2006) for the floodplain lakes along the Morava River (Slovakia).…”

Section: Discussionmentioning

confidence: 99%

Effects of lateral connectivity on zooplankton community structure in floodplain lakes

et al. 2016

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Hydrological conditions are responsible for the changes in lateral connectivity between the main river channel and the floodplain lakes, a factor controlling zooplankton abundance and diversity. We tested the hypothesis that the degree of connectivity between the aquatic habitats and the river channel governs the zooplankton densities and community structure. Abundances, community composition and species diversity of zooplankton were analysed against the gradient of lakes' connectivity and the water quality parameters under a natural flood pulse in the Biebrza River (North-Eastern Poland). Our findings revealed that the water level fluctuations directly affect the availability of nutrients, aeration, what in turn controls the densities and biovolumes of zooplankton communities. Along with the increase in the lake isolation, the taxonomic diversity of zooplankton decreased, while the eudomination of taxa indicative of advanced trophy (Rotifera) was observed. Qualitative parameters, as number of species, diversity and richness, were significantly higher at mean water levels, which supports the intermediate disturbance hypothesis. The sensitivity of the zooplankton community to variable hydrological conditions and lateral connectivity gradient demonstrates its potential as an unexploited indicator of any habitat changes in the aquatic ecosystems.

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“…In the neotropical region, this genus is relatively poor in species. T. minutus is a common species, restricted to South America, mainly in Brazil (Rocha et al, 1995;Sampaio and López, 2000). T. decipiens also has a wide distribution, and in many places, these two species can occur together.…”

Section: Introductionmentioning

confidence: 99%