Coscinodiscophyceae, Fragilariophyceae e Bacillariophyceae (Achnanthales) dos rios Ivaí, São João e dos Patos, bacia hidrográfica do rio Ivaí, município de Prudentópolis, PR, Brasil

Ferrari, Fernanda; Ludwig, Thelma Alvim Veiga

doi:10.1590/s0102-33062007000200016

Cited by 23 publications

(16 citation statements)

References 15 publications

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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%

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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%

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

et al. 2014

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“…Ferrari & Ludwig 2007, Melo et al 2010, Wetzel et al 2010, Bartozek et al 2013. However, only recently taxonomical studies of surface sediments have began (Fontana & Bicudo 2009, Silva & Bicudo 2014, including the addition of new species (Wengrat et al 2015, Almeida et al 2015.…”

Section: Introductionmentioning

confidence: 99%

Composition and distribution of diatom assemblages from core and surface sediments of a water supply reservoir in Southeastern Brazil

et al. 2016

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Composition and distribution of diatom assemblages from core and surface sediments of a water supply reservoir in Southeastern Brazil. Biota Neotropica. 16(2): e20150129. http://dx.doi.org/10.1590/1676-0611- BN-2015-0129 Abstract: Fresh water biodiversity is an increasing concern due to growing human impact. Herein, we report a long-term survey (ca. 90 years) of sedimentary diatoms and the modern flora from surface sediments and their biodiversity changes along a eutrophication gradient. Study was carried out in one of the most important water supply reservoirs (Guarapiranga Reservoir) of Sã o Paulo Metropolitan Region, Brazil. Results are based on 75 core subsamples (subfossil assemblages from core) previously dated by 210 Pb and 14 samples from surface sediments (modern assemblages). Overall, 84 taxa were reported, belonging to 30 genera, 71 species and eight non-typical varieties, besides five probable new taxa. Results expanded two new additions for the Brazilian diatom flora (Chamaepinnularia submuscicula and Stauroneis acidoclinata) and 30 infrageneric taxa for the state of Sã o Paulo. 47.6% of total taxa inventoried were accounted exclusively for the subfossil assemblages indicating a significant biodiversity change over time. Access to past oligotrophic conditions and to contemporary mesotrophic regions of the Guarapiranga Reservoir accounted for these new additions representing 25% of the total diatom flora. Decline in the total species number along the trophic state gradient occurred for subfossil and modern assemblages. This pattern was even clearer when considering the changes in species richness over time. Eunotia with 21 taxa was the far most represented genera particularly in the oligotrophic phase. During the transitional period , richness gradually declined. With the onset (in the 1970s) and the major eutrophication period (since ca. 1990) occurred a drastic reduction in richness and the replacement of oligotrophic to eutrophic species. Human management also caused abrupt changes in richness. Marked decline occurred (1933) assotiated with hydrological impacts (water discharge increase) with the initial use of the reservoir as a public water supply. Unlike, sudden increase occurred probably associated with the application of algaecide to control cyanobacterial blooms. Present findings highlight the need for surveying the diatom assemblages in protected environments or in less degraded conditions for biodiversity assessment. Furthermore, reinforce the use of paleolimnological approach as in many cases the only tool to assess biodiversity changes encompassing time scales relevant to human-induced degradation and pre-anthropogenic impacts. Keywords: Bacillariophyta, biodiversity change, eutrophication, Guarapiranga Reservoir, paleolimnology, species richness.FAUSTINO, S.B., FONTANA, L., BARTOZEK, E.C.R., BICUDO, C.E.M., BICUDO, D.C. Composic¸ão e distribuic¸ão das diatomáceas de perfil sedimentar e sedimentos superficiais em reservatório de abastecimento no Sudeste do Brasil. Biota Neotropica. 1...

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“…Trabalhos taxonômicos sobre diatomáceas perifíticas vêm avançando no estado Paraná, podendo-se destacar os estudos taxonômicos mais recentes: Leandrini et al (2002), Landucci & Ludwig (2005), Ludwig et al (2005), Ferrari & Ludwig (2007), Tremarin et al (2008Tremarin et al ( , 2009Tremarin et al ( , 2010, Faria et al (2010), Silva et al (2010) e Bertolli et al (2010.…”

Section: Introductionunclassified

Diatomáceas perifíticas em Potamogeton polygonus Cham. & Schltdl.: citações pioneiras para o estado do Paraná

2011

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Diatomáceas perifíticas em Potamogeton polygonus Cham. & Schltdl.: citações pioneiras para o Estado do Paraná. Realizou-se o estudo taxonômico das diatomáceas perifíticas associadas à macrófita aquática Potamogeton polygonus. Espécimes da macrófita foram coletados em fevereiro, maio e novembro/2005 e março/2006, em uma lagoa artificial e no rio Salto Amazonas, ambos localizados em fazendas no município de General Carneiro, Paraná. Baseados na análise de lâminas permanentes com material perifítico oxidado registraram-se cento e quarenta e sete táxons, sendo 55 exclusivos do ambiente lêntico, 34 exclusivos do ambiente lótico e 58 observados em ambos locais. As famílias mais representativas foram Eunotiaceae (13,6%), Pinnulariaceae (11,6%) e Naviculaceae (9,6%). Os gêneros com maior número de espécies e variedades foram Eunotia com 20 táxons e Pinnularia com 17. O estudo contribuiu com 18 novas citações para o Estado do Paraná.

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Coscinodiscophyceae, Fragilariophyceae e Bacillariophyceae (Achnanthales) dos rios Ivaí, São João e dos Patos, bacia hidrográfica do rio Ivaí, município de Prudentópolis, PR, Brasil

Cited by 23 publications

References 15 publications

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

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

Composition and distribution of diatom assemblages from core and surface sediments of a water supply reservoir in Southeastern Brazil

Diatomáceas perifíticas em Potamogeton polygonus Cham. & Schltdl.: citações pioneiras para o estado do Paraná

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