Rivers affect the biovolume and functional traits of phytoplankton in floodplain lakes

Pineda, Alfonso; Moresco, Geovani Arnhold; Paula, Aline Caroline Magro de; Nogueira, Luciane Maria; Iatskiu, Patrícia; Souza, Yasmin Rodrigues de; Reis, Larissa Mozini; Rodrigues, Luzia Cleide

doi:10.1590/s2179-975x7317

Cited by 6 publications

(4 citation statements)

References 32 publications

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“…Regarding research on phytoplankton, studies began in 1993 with Train (1998) reporting temporal changes in the structure of this community. Nevertheless, from 2009 is when the largest number of studies were recorded in the region and the most diverse ecological theories were explored (Rodrigues et al, 2009;Bortolini et al, 2017;Pineda et al, 2017;Zanco et al, 2017).…”

Section: Taxonomic Groupmentioning

confidence: 99%

Upper Paraná River floodplain: synthesizing knowledge over time

Osório

Rodrigues

2021

Acta Limnol. Bras.

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Aim Considering the great environmental and social impact that floodplains have, several studies have been performed in the upper Paraná River floodplain. In this study, we applied a scientometric analysis to understand the evolution of scientific knowledge generated in the Upper Paraná River floodplain, based on studies published in this area. Methods We searched the literature published from 1995 to 2018 using the indexed database - Thomson ISI Web of Science. The following information was obtained for each scientific article: a) year of publication; b) place of research; c) research institution; d) study approach; e) environments; f) subject matter; g) theoretical approach; h) taxonomic groups. Results We found 435 published articles from different study areas (such as: exact and earth sciences, environmental sciences, social and human sciences, health sciences) that used this floodplain as a study area. The linear regression model showed an increase in the number of articles throughout the years. Studies with ecological themes were most prominent, ensuring research with various theoretical approaches and different biological communities used as proxies. Conclusions With this study, we conclude that long-term research was fundamental in generating data to address ecological issues and describe the dynamics of this plain. Studies such as these must have more political and financial support to develop basic scientific studies that can subsidize data for conservation programs and government policies, in order to maintain ecosystem services such as fishing and the availability of quality water.

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Section: Taxonomic Groupmentioning

confidence: 99%

Upper Paraná River floodplain: synthesizing knowledge over time

Osório

Rodrigues

2021

Acta Limnol. Bras.

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“…Nos períodos de cheia, a comunicação entre o rio principal e os ambientes adjacentes é maior e, consequentemente, as condições ambientais e as comunidades biológicas são mais similares entre os dois ambientes (Thomaz et al 2007). Muitos estudos abordam a ecologia do fitoplâncton nesses ambientes com o intuito de indicar e predizer possíveis impactos antrópicos, pois esses ecossistemas são sensíveis e constantemente ameaçados, principalmente pela construção de barragens (Pineda et al 2017). Os organismos fitoplanctônicos são fundamentais aos ecossistemas aquáticos, sendo considerados um dos principais produtores primários e eficientes indicadores ambientais (Margalef 1978, Reynolds 1980.…”

Section: Introductionunclassified

Grupos Funcionais Fitoplanctônicos Evidenciam Diferenças Ambientais Em Uma Planície De Inundação Temperada

Zanon

Iatskiu²,

Lemke³

et al. 2021

Oecol. Aust.

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Floodplain environments have high biodiversity and provide many ecosystem services maintained by the flood pulses. The phytoplankton is essential to the functioning of these ecosystems, acting upon primary productivity and biogeochemical cycles. We evaluated phytoplankton in a river-lake flood system (Illinois River floodplain-USA) during a hydrological cycle and compared the taxonomic (species) and functional (morphologic-based functional groups – MBFG) approaches. As expected, greater species richness was registered in the river and higher biovolume in the lake, as well as the predominance of different MBFGs in each environment. Furthermore, seasonality drove richness and biovolume temporal variation due to the higher water levels during spring. The MBFG IV (i. e. without specialized traits), V (phytoflagellates) and VI (diatoms) were more important for richness and biovolume in both environments. We reinforce the fundamental role of the hydrodynamics characteristics, with higher phytoplankton biovolume values in the lake. Using MBFG resulted in a better explanation to the phytoplankton-environment relationship. Constant water column mixture and high turbidity selected species with traits (e.g. small size, presence of silica) specifically adapted to these conditions.

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“…PAR attenuation coefficients ( k ), and Z eu can be accurately calculated from vertical profiles of underwater PAR irradiance by using underwater quantum sensors (Liu et al, ; Padial & Thomaz, ). In addition, SD is widely used to estimate k and Z eu due to the ease of its measurement (Cardoso et al, ; Pineda et al, ; Zanco, Pineda, Bortolini, Jati, & Rodrigues, ). The significant correlations between SD and k , and between SD and Z eu , allow for the use of regression models (Padial & Thomaz, ; Zhang, Liu, Yin, Wang, & Qin, ) and indices, which emerge from the product k × SD and the ratio Z eu /SD (Koenings & Edmundson, ).…”

Section: Introductionmentioning

confidence: 99%

“…Although it has long been known that the balance between scattering and absorption of PAR influences the relations between SD and k , and between SD and Z eu (Effler, ), SD is widely applied to evaluate light climate variability in river‐floodplain systems without validating if the relations are constant in space and time (Cardoso et al, ; Mayora et al, ; Pineda et al, ; Zanco et al, ). As a result, this research aims to evaluate the main components driving the variability in light climate in a turbid river‐floodplain system and the feasibility of evaluating it from SD.…”

Section: Introductionmentioning

confidence: 99%

Spatio‐temporal variability in underwater light climate in a turbid river‐floodplain system: Driving factors and estimation using Secchi disc

Mayora

Devercelli

2019

River Research & Apps

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The underwater light climate has important effects on primary producers. The aim of this research was to evaluate its variability in a turbid river-floodplain system. Photosynthetically active radiation (PAR) was measured in the Middle Paraná River during different hydrological phases to (a) analyse the photosynthetically active radiation attenuation coefficient (k) and euphotic depth (Z eu ) as well as their associations with optically active components and (b) develop and evaluate indices and regression models based on Secchi disc (SD) measurements to estimate k and Z eu . Values of k were higher in the fluvial system than in the floodplain and during low-water stage than high-water stage. Particulate components controlled the light climate variability.Chromophoric dissolved organic matter and chlorophyll-a had significant effects during floods. The estimation of k and Z eu was sensitive to temporal but not to spatial variations. The highest prediction accuracy was observed when using specific nonlinear regressions for each hydrological phase, especially for Z eu estimation (low stage: k = 1.76 × SD −0.80 , Z eu = 2.62 × 1/SD −0.80 ; high stage: k = 2.04 × SD −0.53 , Z eu = 2.26 × 1/SD −0.53 ). The indices k × SD and Z eu /SD were significantly different from those proposed for clear water environments. It is concluded that temporal variations should be considered when estimating k and Z eu in turbid river-floodplain systems because of the temporal heterogeneity in optically active components.Considering that ecological implication of the light climate depends on Z eu :depth ratio, we propose to estimate Z eu instead of k. Finally, indices proposed for clear water environments are not recommended to be applied to turbid environments.

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Rivers affect the biovolume and functional traits of phytoplankton in floodplain lakes

Cited by 6 publications

References 32 publications

Upper Paraná River floodplain: synthesizing knowledge over time

Upper Paraná River floodplain: synthesizing knowledge over time

Grupos Funcionais Fitoplanctônicos Evidenciam Diferenças Ambientais Em Uma Planície De Inundação Temperada

Spatio‐temporal variability in underwater light climate in a turbid river‐floodplain system: Driving factors and estimation using Secchi disc

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