Cyanobacterial blooms in Argentinean inland waters

Pizzolon, Lino; Tracanna, Beatriz Concepción; Prósperi, C.; Guerrero, Johanna

doi:10.1046/j.1440-1770.1999.00085.x

Cited by 30 publications

(16 citation statements)

References 4 publications

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“…In this respect, the N/P ratio is more relevant to biological production than individual amounts of each element (Pizzolon et al, 1999;Quiros et al, 2002;Tejada and Gonzalez, 2005). Although the inorganic-N/P ratios that reportedly cause eutrophication vary widely, values in the range of 5 to 60 are biologically productive.…”

Section: Nutrient Losses In Runoff Water and Sedimentsmentioning

confidence: 99%

Influence of two organic amendments on the soil physical properties, soil losses, sediments and runoff water quality

Tejada

González

2008

Geoderma

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Section: Nutrient Losses In Runoff Water and Sedimentsmentioning

confidence: 99%

Influence of two organic amendments on the soil physical properties, soil losses, sediments and runoff water quality

Tejada

González

2008

Geoderma

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“…Nogueira et al (2010) observed the effects of the dams constructed in Paranapanema River on the structure of phytoplankton and pointed out that they had a negative effect on the richness of these organisms. Discharge of nutrients into water bodies have been reported to increase phytoplankton density, especially cyanobacteria (PIZZOLON et al, 1999;NOGUEIRA et al, 2010;GOWEN et al, 2012). Furthermore, Chellappa and Costa (2003) found that the intensive fish-farming in a northeastern Brazil reservoir provided favorable conditions for the dominance of cyanobacteria.…”

Section: Introductionmentioning

confidence: 99%

Impact of filamentous cyanobacteria on the water quality of two tropical reservoirs

Barros

Lopes

Carvalho³

et al. 2017

RBRH

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Artificial lakes play an important role in water availability in tropical semi-arid Northeastern Brazil. However, in addition to the negative effects that dams have on the water quality of rivers, other practices such as discharge of untreated wastewater, intensive crop fertilization and fish farming have been contributing to water quality deterioration. Climate change may be another driver of water quality decrease. Increases in precipitation and drought intensities as well as temperature increase may redefine the dynamics of planktonic communities and favour species more adapted to the new environment. Water samples were collected in two reservoirs selected based on the recurrence of positive results for saxitoxins, Acarape do Meio (AM) and Sitios Novos (SN). In general, diversity in SN (1.08) was higher than in the AM (0.60). Phytoplankton dynamics in these reservoirs differ from other reservoirs in the same region of Brazil, in the sense that filamentous cyanobacteria are dominant. Furthermore, lower diversity, concentration and richness of chlorophyceae and bacillariophyceae were found in both reservoirs. Increase in diversity was observed during the intense rainy season of 2011, suggesting a slight improvement of water quality. A close inverse correlation between Cylindrospermopsis sp and other cyanobacteria was found in SN (R 2 = -0.862) and in AM (R 2 = -0.997) and the data collected demonstrates that a season with intensive rainfall may lead to lower cyanobacteria concentrations probably due to water dilution and higher flushing rates.Keywords: Artificial reservoirs; Freshwater cyanobacteria; Semi-arid regions; Temporal phytoplankton dynamics; Eutrophication. RESUMOOs lagos artificiais tem um papel primordial na disponibilidade hídrica no semi-árido Brasileiro. Entretanto, além dos efeitos negativos que os barramentos dos rios causam sobre a qualidade da água, a descarga de esgotos, a irrigação e a piscicultura intensivas vêm acentuando a deterioração da qualidade da água em um ritmo sem precedentes nesta região. A mudança climática é outro fator de impacto negativo na qualidade da água. O aumento da intensidade das precipitações pode redefinir a dinâmica das comunidades de plâncton e espécies mais adaptadas a ambientes extremamente variáveis. Os reservatórios estudados, Acarape do Meio (AM) e Sítios Novos (SN), foram selecionados com base na recorrência de resultados positivos para saxitoxinas. A dinâmicas do fitoplâncton encontrada, difere de outras áreas da mesma região, no sentido em que as cianobactérias filamentosas são dominantes. Baixas diversidade, concentração média e riqueza de Chlorophyceae e Bacillariophyceae foram encontrados em ambos os reservatórios, embora tenha sido observado um aumento durante o intenso período chuvoso de 2011, sugerindo uma ligeira melhoria da qualidade da água. Em geral, a diversidade no reservatório SN (1,08) foi maior que no AM (0,60). Uma correlação inversa entre a concentração de Cylindrospermopsis sp e outras cianobactérias foi encontrada nos reservatór...

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“…Studies by Pizzolón, Tracanna, Prósperi and Guerrero (1999) have shown the presence of cyanotoxins in different rivers and reservoirs of Argentina, whereas this is the first record of microcystins with three variants (LR, RR, and [D-Leu 1 ] Mcyst-LR) in the Paraná River. LR and RR variants, which are typical of blooms dominated by the genus Microcystis (Park et al, 1998;Welker, Sigrid & Steinberg, 1999), were recorded during all the years of the present study, mainly during the warmer months.…”

Section: The Microcystin Variants Lr Rr and [D-leu 1 ]mentioning

confidence: 81%

Presencia y toxicidad de Microcystis aeruginosa (Cianobacteria) en el río Paraná, aguas abajo de la represa Yacyretá (Argentina).

Forastier

Zalocar

Andrinolo³

et al. 2016

RBT

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Cyanobacteria constitute the main toxin producers in inland water ecosystems and have extensive global distribution. The presence of hepatotoxins in aquatic environments is hazardous to human and animal health; even though the presence and identification of hepatotoxic microcystins in rivers and reservoirs of the world have been confirmed by several studies in the last few years. Herein, we studied the abundance and toxicity of Microcystis aeruginosa in the Argentine section of the Paraná River at the beginning of the Middle Paraná (Corrientes Hydrometer), near Corrientes city (27º28´ S -58º51´ W) and approximately 220 km downstream of the Yacyretá dam (High Paraná). The Paraná River basin, with a drainage area of 3

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Cyanobacterial blooms in Argentinean inland waters

Abstract: The occurrence of cyanobacterial blooms in Argentina is documented and note is made of particular water‐bodies at risk from blooms.

Cited by 30 publications

References 4 publications

Influence of two organic amendments on the soil physical properties, soil losses, sediments and runoff water quality

Influence of two organic amendments on the soil physical properties, soil losses, sediments and runoff water quality

Impact of filamentous cyanobacteria on the water quality of two tropical reservoirs

Presencia y toxicidad de Microcystis aeruginosa (Cianobacteria) en el río Paraná, aguas abajo de la represa Yacyretá (Argentina).

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