Periphytic algae of the Garças Lake, Upper Paraná River floodplain: comparing the years 1994 and 2004

Ea, Murakami; Dc, Bicudo; Rodrigues, Luzia Cleide

doi:10.1590/s1519-69842009000300002

Cited by 33 publications

(25 citation statements)

References 17 publications

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“…Periphyton response to disturbances, such as flood pulse, depends on the intensity of the event (Biggs and Thomsen, 1995;Rodrigues and Bicudo, 2004). In this study, the flood pulse influenced both the richness Zygnemaphyceae 123 82 Chlorophyceae 74 65 Bacillariophyceae 66 92 Cyanophyceae 60 33 Euglenophyceae 30 20 Xanthophyceae 13 10 Other 16 13 Total 382 and composition of periphyton.…”

Section: Discussionmentioning

confidence: 65%

“…In general, richness of periphytic algae in the lakes studied was greater during high water periods than low water periods, as shown by the positive significant correlation between periphytic algae richness and the level of the Paraná River, and by the analyses of variance. Rodrigues and Bicudo (2004) and Leandrini et al (2008) observed that the periphytic biomass in the Upper Paraná River floodplain was more influenced by hydrological periods, especially in high water. Fonseca and Rodrigues (2005) and Algarte et al (2006) observed that both periphyton density and richness in the Upper Paraná River floodplain were more influenced by hydrological periods than any other factor.…”

Section: Discussionmentioning

confidence: 99%

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Effects of hydrological regime and connectivity on the interannual variation in taxonomic similarity of periphytic algae

et al. 2009

Braz. J. Biol.

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The aim of this study was to analyze the effects of flood pulses (intensity) on the richness and composition of periphytic algae in lentic environments of the Upper Paraná River floodplain, over a six-year period. Other factors, such as connectivity of the environments with the main channel of the river and the availability of substrate for the periphyton, were also evaluated. For qualitative analyses, periphyton community was sampled from adult petioles of Eichhornia azurea Kunth taken from the littoral regions of the lakes studied. A total of 457 taxa of periphytic algae, distributed within 141 genera and 10 classes, were registered in the four environments. The greatest richness of periphytic algae was observed in connected floodplain lakes, especially in 2007 and during high water periods. In both connected and disconnected lakes, richness correlated positively with water levels of the Paraná River. Richness was also positively correlated with the number of taxa of aquatic macrophytes. The specific composition of periphytic algae differed between high and low water periods, and between connected and disconnected lakes. Therefore, among the considered variables, it is evident that flood pulse constitutes the principal force acting on periphytic algae communities of the floodplain, followed by the degree of connectivity and the presence of aquatic macrophytes.Keywords: periphyton, species richness, species composition, flood pulse, floodplain, disturbance, degree of connectivity. Efeito do regime hidrológico e da conectividade na similaridade taxonômica de algas perifíticas: variação interanual ResumoEste trabalho visou analisar o efeito do pulso de inundação (intensidade) sobre a riqueza e composição de algas perifíticas, ao longo de seis anos, em ambientes lênticos da planície de inundação do Alto Rio Paraná. A influência da conectividade dos ambientes com a calha principal do rio e disponibilidade de substratos para a comunidade de algas perifíticas também foi avaliada. Para análise, a comunidade perifítica foi amostrada de pecíolos adultos de Eichhornia azurea Kunth, retirados da região litorânea das lagoas estudadas. Considerando os quatro ambientes, foram registrados 457 táxons de algas, distribuídos em 141 gêneros e 10 classes. A maior riqueza de algas perifíticas foi observada em lagoas conectadas, com destaque para o ano de 2007 e para o período de águas altas. A riqueza apresentou correlação positiva, nas lagoas conectadas e não conectadas, com nível hidrométrico do Rio Paraná. Também esteve correlacionada positivamente com o número de táxons de macrófitas aquáticas. A composição de algas perifíti-cas diferiu entre os períodos de águas altas e águas baixas e entre lagoas conectadas e não conectadas. Ficou evidente que, dentre as variáveis consideradas, o pulso de inundação constitui a principal função de força atuando sobre a comunidade de algas perifíticas na planície, seguido pelo grau de conectividade e presença de macrófitas aquáticas.Palavras-chave: perifíton, riqueza, composição específ...

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Section: Discussionmentioning

confidence: 65%

Section: Discussionmentioning

confidence: 99%

Effects of hydrological regime and connectivity on the interannual variation in taxonomic similarity of periphytic algae

et al. 2009

Braz. J. Biol.

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“…Colonization process has been found to be influenced by different factors such as wave energy, type of the substrata, as well as size, immigration and reproduction rate of periphytic organisms (Á cs and Kiss, 1993;Á cs et al, 2000;Albay and Akc¸allan, 2003). Many recent studies have been undertaken to determine the responses of periphyton to the changes in hydrologic levels in tropical floodplains and results clearly showed that flood pulse constitutes the principal force acting directly on the colonization processes and successive patterns of periphytic communities (Rodrigues and Bicudo, 2001;Algarte et al, 2009;Murakami et al, 2009). However, seasonality of the periphytic algae colonization has not yet been investigated in detail.…”

Section: Introductionmentioning

confidence: 99%

Periphytic algae colonization driven by variable environmental components in a temperate floodplain lake

Pfeiffer

Mihaljević

Stević

et al. 2013

Ann. Limnol. - Int. J. Lim.

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-The colonization of periphytic algae in a temperate floodplain was studied in Lake Sakadasˇ, a part of a fluvial floodplain along the Danube River. An in situ investigation, using artificial substrata, was started after extremely high spring flooding and was carried out during long-lasting summer floods (July-August 2010). The physical and chemical environment was variable and large stands of metaphyton, submersed and floating macrophytes were spread along the lake. The periphyton development was initiated on the first day of exposition and algal abundance increased exponentially till day 27. Directional changes in the relative abundance of algal species, shown by the results of the non-metric multidimensional scaling, indicate a pattern of short-term sequences in algal colonization. The initial attachment of planktonic cyanobacteria and unicellular diatoms (initial phase, days 1-3) to the biofilm matrix was followed by the development of the filamentous chlorophytes, Cladophora glomerata and Oedogonium spp. (intermediate phase, days 6-15) and then by stalk-forming diatoms particularly Gomphonema spp. (late phase, days 18-33). According to the redundancy analyses, water temperature and oscillations of Danube water level that define the flooding pattern had the most significant influence on algal colonization. Flood-induced spreading of metaphyton firstly supported the rapid progress of algal colonization towards a climax community, while later, metaphyton together with macrophytes disrupted algal community by increasing the mechanical injuries, shading and grazing pressure. Consequently, algal abundance and community structure were returned to the intermediate phase of colonization.

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“…The availability of these food items is associated to the high transparency of Paraná subsystem water. As stated previously, this transparency has favored submerse aquatic macrophytes colonization and by consequence the establishment of periphytic algae, mainly filamentous algae (Murakami et al, 2009;Neif et al, 2014). Macrophytes and filamentous algae were not food items observed in its native areas (Agostinho et al, 2015), nor in the tributaries (i.e.…”

Section: Discussionmentioning

confidence: 72%

Feeding and body condition of an invasive fish species under different environmental conditions

et al. 2016

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Diet, energy density (ED) and relative condition factor (Kn) were used to investigate the energetic assimilation of the invasive fish Hemiodus orthonops under different environmental condition of the upper rio Paraná floodplain. Samples were taken in June and September 2013 and 2014. Nutrient content was determined for sediment. The diet was combined in the Food Index (IAi%), ED was expressed in Kcal/g of dry weight and Kn was calculated by: K n = Wt/We, where Wt is the total weight and We the expected weight. Detritus/sediment prevailed in the stomachs of specimens from Ivinhema and Baia, while Algae was the main item in Paraná, reflecting the resource availability. ED and Kn from Ivinhema specimens were the greatest, consequence of the quality of food and lower spent on searching and handling food. The Paraná specimens showed lower ED values, but higher Kn values, due to algae consumption, a nutrient-rich resource. Baia presented high aluminum concentration on the sediment and the lower pH values, which contribute to reduce the nutritional value of the detritus and the ED and Kn values of their specimens. In conclusion, H. orthonops is capable to take advantage of the resources availability in the different environments, ensuring their establishment.Análise de dieta, densidade energética (DE) e fator de condição relativo (Kn) foram utilizados para investigar a assimilação energética do peixe invasor Hemiodus orthonops sob diferentes condições ambientais da planície de inundação do alto rio Paraná. As coletas ocorreram em junho e setembro de 2013 e 2014. O teor de nutrientes foi obtido para o sedimento. A dieta foi combinada no Índice Alimentar (IAi%), a DE foi expressa em Kcal/g de peso seco, o Kn foi calculado através de: K n = Wt/We, onde Wt é o peso total e We o peso esperado. Detrito/sedimento prevaleceu nos estômagos dos espécimes do Ivinhema e Baía, enquanto Alga foi o principal item no Paraná, refletindo a disponibilidade de recursos. A DE e Kn dos indivíduos do Ivinhema foram os maiores, consequência da qualidade do alimento e do menor gasto em procura e manipulação do alimento. Os indivíduos do Paraná registraram os menores valores de DE, mas elevados valores de Kn, devido ao consumo de alga, um recurso alimentar rico em nutrientes. Baía apresentou elevada concentração de alumínio no sedimento e reduzidos valores de pH, o que contribuiu com a redução do valor nutricional do detrito e dos valores de DE e Kn dos indivíduos. Concluindo, H. orthonops é capaz de se beneficiar da disponibilidade de recursos nos diferentes ambientes, garantindo seu estabelecimento.

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Periphytic algae of the Garças Lake, Upper Paraná River floodplain: comparing the years 1994 and 2004

Cited by 33 publications

References 17 publications

Effects of hydrological regime and connectivity on the interannual variation in taxonomic similarity of periphytic algae

Effects of hydrological regime and connectivity on the interannual variation in taxonomic similarity of periphytic algae

Periphytic algae colonization driven by variable environmental components in a temperate floodplain lake

Feeding and body condition of an invasive fish species under different environmental conditions

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