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

Santos, Eloési Machado dos; Tremarin, Priscila Izabel; Ludwig, Thelma Alvim Veiga

doi:10.1590/s1676-06032011000300025

Cited by 19 publications

(25 citation statements)

References 16 publications

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“…Ludwig & Flôres (1995;1997) conducted studies in rivers within the catchment area of the Segredo hydroelectric power plant, and Brassac et al (1999) studied the area around the Salto Caxias hydroelectric power plant, both identifying centric diatoms. 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).…”

Section: Introductionsupporting

confidence: 69%

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: Introductionsupporting

confidence: 69%

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

et al. 2014

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“…This is a poorly known species in Brazil, and was probably only recorded for the southern region of Brazil by Santos et al (2011). No ecological information is available.…”

Section: Sellaphoraceae Mereschkowskymentioning

confidence: 99%

“…This is the species' first citation for the state of São Paulo. The species has probably only been cited by Santos et al (2011) for the Southern region of Brazil. Ecological information is not available in literature.…”

Section: Sellaphoraceae Mereschkowskymentioning

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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“…In Brazil, the Nupela species are documented mainly in floristic surveys (faria et al 2010;Canani et al 2011;moreSCo et al 2011;SanToS et al 2011;beS et al 2012;barTozeK et al 2013). Seven species has been documented (Tremarin et al 2009) and a new species -N. pardinhoensis beS, Torgan et eCTor (beS et al 2012) has been established.…”

Section: Introductionmentioning

confidence: 99%

Nupela (Bacillariophyceae) in littoral rivers from south Brazil, and description of six new species of the genus

Tremarin¹,

Straube²,

Ludwig³

2015

Fottea

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Abstract:The genus Nupela is characterized mainly by structure of the areola and raphe system. Many species were described from tropical regions; however, few studies have been conducted on Brazilian environments. The goal of this article is to identify and describe the morphology of Nupela species, under light and electron microscopy, found in the rivers of the Atlantic Forest from southern Brazil. Twelve species were found, including six described as new:

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

Cited by 19 publications

References 16 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

Nupela (Bacillariophyceae) in littoral rivers from south Brazil, and description of six new species of the genus

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