Phytoplankton composition, biodiversity and a pilot survey of toxic cyanoprokaryotes in a large cascading reservoir system (Tietê basin, Brazil)

Padisák, Judit; Barbosa, Francisco A. R.; Borbély, György; Borics, Gábor; Chorus, Ingrid; Espíndola, E. L. G.; Heinze, Rita; Rocha, Óscar J.; Törökné, Andrea; Vasas, Gábor

doi:10.1080/03680770.1998.11898164

Cited by 19 publications

(27 citation statements)

References 21 publications

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“…On the one hand, water transfers can improve the trophic state of the receiving water via dilution (Hu et al, 2008;Welch and Patmont, 1980;Welch et al, 1992;Zhai et al, 2010). The water quality of downstream reservoirs could also be improved by using upstream reservoirs as storage to store nutrient loads (Padisak et al, 2001). On the other hand, if the nutrients in the transferred water were higher than in the receiving reservoir, there is a risk of water quality deterioration.…”

Section: Introductionmentioning

confidence: 99%

The potential impact of an inter-basin water transfer project on nutrients (nitrogen and phosphorous) and chlorophyll a of the receiving water system

Zeng

Qin

2015

Science of The Total Environment

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Section: Introductionmentioning

confidence: 99%

The potential impact of an inter-basin water transfer project on nutrients (nitrogen and phosphorous) and chlorophyll a of the receiving water system

Zeng

Qin

2015

Science of The Total Environment

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“…However, detailed investigations of the influence of Brazilian reservoir cascades on the aquatic biota are still scarce. Studies along 8 reservoirs in the Tietê River (Padisák et al, 2000) and 5 reservoirs in the Iguaçu River (Paraná State) (Silva et al, 2005) showed that phytoplankton is highly affected by hydrodynamic changes. Another regional (Paraná-La Plata basin) study on phytoplankton of a cascade system was carried out in 3 consecutive reservoirs of the Negro River (Uruguay) (Bonilla, 1997).…”

Section: Introductionmentioning

confidence: 99%

“…Nevertheless, comparisons are methodologically limited due to the low sampling frequency -only once (Bonilla, 1997;Padisák et al, 2000) or twice (Silva et al, 2005), and only a single sampling station just above dam. It is already known that the phytoplankton distribution in…”

Section: Introductionmentioning

confidence: 99%

Phytoplankton assemblages in a reservoir cascade of a large tropical - subtropical river (SE, Brazil)

et al. 2010

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The phytoplankton assemblages from eight reservoirs of the Paranapanema River were studied during two consecutive years. Chlorophyceae and Bacillaryophyceae dominated in richness. The observed high number of taxa, 234, reflects the extensive sampling programme and evidences the necessity of considering the whole hydrograph basin to assess the biodiversity status of inland water ecosystems. The dams had a negative effect on phytoplankton richness, with higher number of taxa associate to riverine (non-regulated) stretches. The tributary rivers also exhibited high species richness, showing the importance of considering the lateral dimension, in addition to the longitudinal one, for aquatic biota inventories in large river basins/reservoirs. Richness and diversity were also positively influenced by the connectivity with lateral wetlands (macrophyte-dominated lakes) due to the periphyton influence. The phytoplankton abundance/ biomass was not influenced by higher water retention time. Higher values occurred in the middle basin stretches (riverpassage reservoirs) due to the increase in the trophic conditions. There was a positive correlation with phosphorus. Poorer light conditions in the cascade do not limit the phytoplankton biomass, with assemblages dominated by species tolerant to turbulent conditions and high mineral turbidity. Bacillariophyceae and Cryptophyceae dominated numerically. The first group (unicellular forms) was prominent in the large and oligotrophic upstream reservoirs. The second was highly abundant in the river-passage (low retention time), and more eutrophic, reservoirs. Cyanophyceae growth is probably controlled by advection processes (wash-out effect). The zooplankton does not control the phytoplankton biomass and the diversity of both groups is positively associated in the cascade. The structure of the phytoplankton assemblages showed to be a good indicator of the operationally distinct reservoirs of the Paranapanema cascade and also reflected the changes in the trophic conditions along the basin.Keywords: Paranapanema River, Chlorophyceae, Bacillaryophyceae, Cryptophyceae, reservoir limnology.Assembleias fitoplanctônicas de reservatórios em cascata de um rio tropicalsubtropical de grande porte (SE, Brasil) ResumoAs assembleias fitoplanctônicas de oito reservatórios do rio Paranapanema foram estudadas durante dois anos consecutivos. Chlorophyceae e Bacillaryophyceae foram os grupos dominantes em riqueza. O elevado número de táxons observado, 234, reflete o extensivo programa de amostragem e evidencia a necessidade de se considerar a bacia hidrográfica como um todo em programas de avaliação da biodiversidade de ecossistemas aquáticos interiores. As barragens tiveram um efeito negativo sobre a riqueza do fitoplâncton, sendo o maior número de táxons associado aos trechos fluviais (não regulados). Os rios tributários também exibiram um elevado número de espécies, mostrando a importância de se considerar a dimensão lateral, além do gradiente longitudinal, para os inventários da biota aquát...

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“…In his limnological characterization of the hydropower plant of Ipueiras, Reis-Pereira (2002) points out the high contribution of Chlorophyceae to the phytoplankton community, with relative abundances varying from 34% to 74% of the total abundance. This group is also well represented in other Brazilian environments, indicating the good adaptation of these species to tropical eutrophic aquatic environments (Sant'Anna and Azevedo, 2000;Padisák et al, 2000).…”

Section: Discussionmentioning

confidence: 73%

Structure of the phytoplankton community in the Cachoeira Dourada reservoir (GO/MG), Brazil

Oliveira

Peret

2011

Braz. J. Biol.

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The limnological features and the phytoplankton community of the Cachoeira Dourada reservoir were analyzed in December 2006, May 2007 and November 2007. Temporal changes in the taxonomic composition, density, diversity and dominance of species were analyzed in relation to climatic factors and the physical and chemical characteristics of the water. A positive correlation was found between some of the physical and chemical variables and the phytoplankton community. According to the CCA, variables such as the extent of the euphotic zone, temperature, pH, nitrogen and phosphorus concentrations directly affected the phytoplankton dynamics. Organisms belonging to the class Cyanophyceae were the most representative in all the sampling periods, comprising the functional groups K, S1, M and H. Hydrodynamics and seasonal fluctuations of environmental factors were the driving forces determining the composition and abundance of the algal assemblages. Despite the prevalence of Cyanobacteria, the reservoir is still oligotrophic. The absence of blooms and the relatively low population abundances indicated that the quality of the reservoir's water still lies within the limits required for its multiples uses.Keywords: Cachoeira Dourada, phytoplankton ecology, tropical reservoir, algal community. Estrutura da comunidade fitoplanctônica do reservatório de Cachoeira Dourada, GO/MG, Brasil ResumoAs características limnológicas e a comunidade fitoplanctônica do reservatório de Cachoeira Dourada foram analisadas nos meses de dezembro de 2006, maio de 2007 e novembro de 2007. As flutuações temporais na composição taxonômica, densidade, diversidade e dominância de espécies foram analisadas em relação aos fatores climáticos e às variáveis físicas e químicas da água. Uma correlação positiva foi encontrada entre algumas das variáveis físicas e químicas analisadas e a comunidade fitoplanctônica. De acordo com a CCA, variáveis como a extensão da zona eufótica, temperatura, pH, nitrogênio e fósforo influenciaram diretamente na dinâmica do fitoplâncton. Organismos pertencentes à classe Cyanophyceae foram as mais representativas em todos os períodos amostrais, abrangendo os grupos funcionais K, S1, M e H. A hidrodinâmica e a variação sazonal dos fatores ambientais foram as forças determinantes da composição e abundância das assembleias de algas. Apesar do predomínio de cianobactérias, o ambiente do reservatório ainda é oligotrófico. A ausência de florações e as abundâncias populacionais relativamente baixas indicaram que a qualidade da água do reservatório continua se mantendo dentro dos limites estipulados para seus usos múltiplos.Palavras-chave: Cachoeira Dourada, ecologia de fitoplâncton, reservatório tropical, comunidade algal.

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Phytoplankton composition, biodiversity and a pilot survey of toxic cyanoprokaryotes in a large cascading reservoir system (Tietê basin, Brazil)

Cited by 19 publications

References 21 publications

The potential impact of an inter-basin water transfer project on nutrients (nitrogen and phosphorous) and chlorophyll a of the receiving water system

The potential impact of an inter-basin water transfer project on nutrients (nitrogen and phosphorous) and chlorophyll a of the receiving water system

Phytoplankton assemblages in a reservoir cascade of a large tropical - subtropical river (SE, Brazil)

Structure of the phytoplankton community in the Cachoeira Dourada reservoir (GO/MG), Brazil

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