Fragilariaceae (Bacillariophyceae) de rios da bacia do Iguaçu, Estado do Paraná, Brasil

Brassac, Nicole Machuca; Ludwig, Thelma Alvim Veiga

doi:10.1590/s0100-84042003000300004

Cited by 19 publications

(21 citation statements)

References 7 publications

(5 reference statements)

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“…1-6). The specimens of F. javanica, illustrated by Krammer & Lange-Bertalot (1991) and Metzeltin & LangeBertalot (1998), in their majority, display valves without constriction or with a slight median constriction, as do those described by Brassac & Ludwig (2003), Landucci & Ludwig (2005) and Ferrari & Ludwig (2007), with considerable variation in striae density.…”

Section: Terpsinoë Musicamentioning

confidence: 92%

“…In several studies (Flôres et al 1999;Brassac & Ludwig 2003;Ferrari & Ludwig 2007), the taxon Fragilaria vaucheriae has shown great morphological variation, displaying individuals in transition from one form to another. Patrick & Reimer (1966) described F. vaucheriae as having an asymmetrical central area, typically with unilateral swelling.…”

Section: Terpsinoë Musicamentioning

confidence: 99%

“…Similar studies were conducted by Tremarin et al (2009a), in the Maurício River, and by Santos et al (2011), in the Salto Amazonas River and in an artificial lake in the municipality of General Carneiro. Other studies of diatoms in the Iguaçu River were performed by Brassac & Ludwig (2003;, Ludwig et al (2008) and by Bartozek et al (2013). At Iguaçu Falls, Metzeltin & Lange-Bertalot (1998; identified 45 taxa, of which only six were centric and none were araphid.…”

Section: Introductionmentioning

confidence: 99%

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Coscinodiscophyceae and Fragilariophyceae (Diatomeae) in the Iguaçu River, Paraná, Brazil

et al. 2014

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A taxonomic survey was carried out on Coscinodiscophyceae and Fragilariophyceae found in the Iguaçu River catchment area within Iguaçu National Park, in the state of Paraná, Brazil. Between September 2007 and August 2008, we collected 24 samples from two stations on the Iguaçu River, upstream and downstream of the falls. We identified 37 taxa, including 22 specific and infraspecific taxa of Coscinodiscophyceae, together with 15 specific and infraspecific taxa of Fragilariophyceae. Melosira ruttneri Hustedt and Fragilaria alpestris Krasske ex Hustedt represent new records for Brazil.

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Section: Terpsinoë Musicamentioning

confidence: 92%

Section: Terpsinoë Musicamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Coscinodiscophyceae and Fragilariophyceae (Diatomeae) in the Iguaçu River, Paraná, Brazil

et al. 2014

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“…Furthermore, studies of a taxonomic nature (Brassac andLudwig, 2003, 2005) and of the functional groups directly linked to physiological adaptations were conducted, allowing for a more effective prediction of environmental conditions. In tropical and subtropical regions, this approach has been applied by Kruk et al (2002), Melo and Huszar (2000), Huszar et al (2003), Crossetti and Bicudo (2005), Lopes et al (2005), Borges et al (2008), Gemelgo et al (2009), among others.…”

Section: Introductionmentioning

confidence: 99%

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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“…As diatomáceas constituem um grupo de importância ecológica e econômica ( Van den Hoek et al 1995;Stoermer et al 1999); contudo, por apresentarem morfologia complexa, nomenclatura própria, alto índice de polimorfismo e o acesso à literatura especializada ser difícil, os estudos taxonômicos realizados no Brasil se concentram, principalmente, nas regiões sul e sudeste (Brassac & Ludwig 2003). No estado de Goiás e Distrito Federal há poucos trabalhos e isto de deve a escassez de especialistas e pesquisas na área.…”

Section: Introductionunclassified

Diatomoflórula Perifítica do rio Descoberto - DF e GO, Brasil, Naviculales (Bacillariophyceae): Diploneidineae e Sellaphorineae

Delgado

Souza

2007

Acta Bot. Bras.

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(Diatomoflórula Perifítica do rio Descoberto - DF e GO, Brasil, Naviculales (Bacillariophyceae)): Diploneidineae e Sellaphorineae). O presente estudo enfocou as diatomáceas perifíticas pertencentes às subordens Diploneidineae e Sellaphorineae de Naviculales (Bacillariophyceae) do rio Descoberto, Distrito Federal, Goiás. As coletas foram realizadas em junho e julho/2003 (período de seca) e janeiro e fevereiro/2004 (período de chuva), em cinco estações de amostragem. Foram identificados 16 táxons infragenéricos, uma espécie pertencente à ordem Diploneidineae e as demais à ordem Sellaphorineae. Foram registradas 14 citações pioneiras para o estado de Goiás e 15 citações pioneiras para o Distrito Federal.

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Fragilariaceae (Bacillariophyceae) de rios da bacia do Iguaçu, Estado do Paraná, Brasil

Abstract: -(Fragilariaceae (Bacillariophyceae) from rivers of Iguaçu basin, Paraná State, Brazil). This is a survey of the diatom flora of rivers in the influenced area of Caxias ' Power Plant,

Cited by 19 publications

References 7 publications

Coscinodiscophyceae and Fragilariophyceae (Diatomeae) in the Iguaçu River, Paraná, Brazil

Coscinodiscophyceae and Fragilariophyceae (Diatomeae) in the Iguaçu River, Paraná, Brazil

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

Diatomoflórula Perifítica do rio Descoberto - DF e GO, Brasil, Naviculales (Bacillariophyceae): Diploneidineae e Sellaphorineae

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