Untitled

Pourriot, R.; Rougier, C.; Miquelis, Anne

doi:10.1023/a:1002935807795

Cited by 65 publications

(14 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Therefore, although tributaries show considerably high values of nutrient concentration, which was also verified in the lakes, the water residence time, extremely reduced in these environments, limits the development of populations of copepods (Pourriot et al, 1997). Moreover, higher turbidity values found in these tributaries can limit the occurrence of these organisms, by obstructing the respiratory tract (Mitsuka & Henry, 2002).…”

Section: Discussionmentioning

confidence: 83%

Copepod assemblage structure (Crustacea: Copepoda) along a longitudinal environmental gradient in a tropical river-floodplain system, Brazil

et al. 2017

View full text Add to dashboard Cite

Cite as: Palhiarini, W.S. et al. Copepod assemblage structure (Crustacea: Copepoda) along a longitudinal environmental gradient in a tropical river-floodplain system, Brazil. Acta Limnologica Brasiliensia, 2017, vol. 29, e102. Abstract: Aim: In this study, we analyzed the structure of the copepod community along a longitudinal axis of the last undammed stretch of the Upper Paraná River floodplain, downstream of Porto Primavera reservoir. We hypothesized that (i) copepod assemblage would show an increase in the abundance of organisms, species richness and specific diversity with the distance from the Porto Primavera reservoir, due to the arrival of species from adjacent lakes and tributaries; (ii) copepod abundance and species richness would be higher in tributaries and adjacent lakes located at the floodplain, which show higher environmental heterogeneity and function as a species source; and (iii) spatial patterns of copepod assemblage structure are related to the environmental gradient, since copepods show a rapid response to the variation of environmental conditions. Method: Sampling was performed quarterly from August 2013 to July 2014, at the subsurface of the pelagic region. Sampling sites were located along the Paraná River, in seven of its tributaries, and in eight lakes located in its floodplain. Results: We identified 29 species belonging to two families: Cyclopidae (21 species) and Diaptomidae (eight species). On contrary of our first hypothesis, ANOVA results showed a significant decrease in copepod abundance in the downstream direction. Similarly, the tributaries showed higher values of ecological attributes in the upstream stretch. RDA results showed that in axis 1, the Paraná River and the lakes were positively correlated with conductivity, pH, temperature and suspended organic matter, characterized by the most abundant copepod species. The tributaries, on the other hand, were negatively correlated with turbidity, total nitrogen, total phosphorus and depth. Axis 2 showed a positive correlation of the Paraná River with conductivity and suspended organic matter, and a higher abundance of Argyrodiaptomus azevedoi, Notodiaptomus iheringi, N. henseni, N. cearensis 2 Palhiarini, W.S. et al.

show abstract

Section: Discussionmentioning

confidence: 83%

Copepod assemblage structure (Crustacea: Copepoda) along a longitudinal environmental gradient in a tropical river-floodplain system, Brazil

et al. 2017

View full text Add to dashboard Cite

show abstract

“…Similar results of fast colonisation were found by Garrido and Bozelli (2000) during the filling of another large reservoir in Brazil. The higher species richness in the Iguaçu River compared to tributaries in both phases is probably due to the drift of species downstream from upstream reservoirs and the large size of the river, as occurs in most rivers connected to permanent or temporary bodies of water, from where individuals are exported (Pourriot et al, 1997;Lopes et al, 1997;Viroux, 2002;Perbiche-Neves and Nogueira, 2010;Perbiche-Neves et al, 2012).…”

Section: Discussionmentioning

confidence: 99%

Continuity effects on rotifers and microcrustaceans caused by the construction of a downstream reservoir in a cascade series (Iguaçu River, Brazil)

et al. 2016

View full text Add to dashboard Cite

This study evaluated changes in the community of rotifers and microcrustaceans associated with the construction of a large and dendritic reservoir in Iguaçu River (Brazil), as the last reservoir of a sequence of five cascading systems. Differences were clear between pre-filling and post-filling phases for organisms and some of environmental variables. In the pre-filling phase, the community was more homogeneous along the downstream river gradient, and spatial compartmentalization in the new reservoir was common during the post-filling phase. From 140 identified taxa, 10 species occurred exclusively in the pre-filling phase and 32 in the post-filling phase. After completion of the fifth reservoir filling-up, opportunistic, pioneer and fast-developing species quickly dominated, and downstream of the fourth reservoir the pre-filling decreasing gradient of richness, diversity and evenness disappeared. Richness of rotifers and cladocerans, cladocerans diversity, and evenness of rotifers, cladocerans and copepods were generally higher in the post-filling phase. A non-metric multidimensional analysis based on a presence/absence matrix depicted a homogeneous and dense group of species associated to the pre-filling phase and a second, dispersed group related to the post-filling phase. Spearman correlations pointed out significant positive effects of transparency on rotifer species richness in the post-filling phase, and negative effects on the microcrustacean richness in the pre-filling phase. Dam construction caused disruption of the downstream lotic gradient along the series of dams, leading to the development of distinct species in lentic spatial compartments. Efeitos contínuos sobre rotíferos e microcrustáceos causados pela construção de um reservatório a jusante de uma série em cascata, Rio Iguaçú, Brasil Resumo Esse estudo analisou os efeitos da construção de um reservatório largo e dendrítico no Brasil sobre a comunidade de rotíferos e microcrustáceos, sendo o último reservatório de uma cascata de cinco. Houve claras diferenças entre as fases pré e pós-enchimento para os organismos e para algumas variáveis ambientais. Na fase pré-enchimento, a comunidade foi mais homogênea no gradiente longitudinal no rio a jusante, e na fase pós-enchimento houve compartimentalização espacial no novo reservatório. Dos 140 táxons identificados, dez espécies ocorreram exclusivamente na fase pré-enchimento e 32 na fase pós-enchimento. Após o enchimento, espécies oportunistas, pioneiras e de rápido desenvolvimento foram dominantes, e desapareceu o gradiente de decréscimo a jusante do quarto reservatório para a riqueza, diversidade e equitabilidade durante a fase pré-enchimento. A riqueza de rotíferos e cladóceros, a diversidade de cladóceros, e a equitabilidade de rotíferos, cladóceros e copépodes foram elevadas na fase pós-enchimento. A análise de escalonamento multidimensional não-métrico sobre a matriz de presença e ausência mostrou um grupo homogêneo e denso de espécies e meses de amostragem na fase pré-enchimento, e outro grupo d...

show abstract

“…It has been suggested that the apparent dominance of rotifers in rivers maybe due to their relatively short generation times compared to the larger crustacean zooplankton (van Dijk & van Zanten 1995;Lair 2006). Furthermore, Pourriot et al (1997) reports that small rotifers are eliminated to a lesser extend by the preying fish. Simply, rotifers are better adapted to the adverse conditions of lotic habitats than crustacean species (Marneffe et al 1996;DemetrakiPaleolog 2004).…”

Section: Discussionmentioning

confidence: 99%

“…The planktonic animals take part in the transformation and circulation of organic matter (Ejsmont-Karabin et al 2004), regulate the biomass of phytoplankton (Lair 2005;Kentzer et al 2010) and provide food for fish, especially for their larval stages and for fish fry (Pourriot et al 1997). However, despite the increased interest in large river ecosystems (Tockner et al 2009), our knowledge of potamoplankton is still incomplete.…”

Section: Introductionmentioning

confidence: 99%

“…The RCC also provides a theory for dynamics of plankton communities in lotic water. Regulation of the rivers and dam construction is considered to be major factor contributing to significant modification of the river ecosystem (Pourriot et al 1997;Kentzer et al 2010). The studied section of the Vistula River was regulated in the nineteenth century.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The diversity and longitudinal changes of zooplankton in the lower course of a large, regulated European river (the lower Vistula River, Poland)

Napiórkowski

Napiórkowska

2013

Biologia

View full text Add to dashboard Cite

The diversity and longitudinal variation of zooplankton in the lower Vistula River were analyzed. Samples were taken from 40 stations located along a 272-km long section of the lower river course. During the study the unique technique of taking samples from "the same water" was used. The zooplankton community was dominated by rotifers and naupliilarval stages of copepods. The most abundant species were: Brachionus angularis, Brachionus calyciflorus and Brachionus budapestiensis. The zooplankton species diversity in the main channel of the lower Vistula River was similar to other large European rivers; however, its abundance was lower. The diversity, abundance and biomass of potamoplankton steadily decreased downstream. This could be related both to scarcity of storage zones for potamoplankton development in the river due to the extensive regulation processes, and changes in hydrological conditions of the main channel (by the straightening of riverbed) where the samples were collected.

show abstract

Untitled

Cited by 65 publications

References 15 publications

Copepod assemblage structure (Crustacea: Copepoda) along a longitudinal environmental gradient in a tropical river-floodplain system, Brazil

Copepod assemblage structure (Crustacea: Copepoda) along a longitudinal environmental gradient in a tropical river-floodplain system, Brazil

Continuity effects on rotifers and microcrustaceans caused by the construction of a downstream reservoir in a cascade series (Iguaçu River, Brazil)

The diversity and longitudinal changes of zooplankton in the lower course of a large, regulated European river (the lower Vistula River, Poland)

Contact Info

Product

Resources

About