Periphytic diatoms from an oligotrophic lentic system, Piraquara I reservoir, Paraná state, Brazil

Abstract

Knowledge of biodiversity in oligotrophic aquatic ecosystems is fundamental to plan conservation strategies for protected areas. This study assessed the diatom diversity from an urban reservoir with oligotrophic conditions. The Piraquara I reservoir is located in an Environmental Protection Area and is responsible for the public supply of Curitiba city and the metropolitan region. Samples were collected seasonally between October 2007 and August 2008. Periphytic samples were obtained by removing the biofilm attached to Polygonum hydropiperoides stems and to glass slides. The taxonomic study resulted in the identification of 87 diatom taxa. The most representative genera regarding the species richness were Pinnularia (15 species) and Eunotia (14 species). Five species were registered for the first time in Brazil and seven in the State of Paraná. Taxonomic and ecological comments of the species registered are provided.

Eunotia (Bacillariophyceae) from a subtropical stream adjacent to Iguaçu National Park, Brazil, with the proposition of a new species

“…Frequency of occurrence: common (Table 3) Frequency of occurrence: constant (Table 3). Paraná State citations: Silva-Lehmkuhl et al (2019); cited as E. camelus var. denticulata Grunow in Moreira-Filho & Kutner (1962); cited as E. camelus in Tremarin et al (2009), Bertolli et al (2010), Faria et al (2010, Silva et al (2010), Santos et al (2011), Bartozek et al (2013), Marra et al (2016).…”

“…Frequency of occurrence: common (Table 3). Paraná State citations: Tremarin et al (2009), Santos et al (2011),Silva et al (2010, Marra et al 2016), Faria et al (2019, Silva-Lehmkuhl et al (2019).…”

“…Frequency of occurrence: common ( Frequency of occurrence: common (Table 3). Paraná State citations: Bartozek et al (2013), Tremarin et al (2009), Marra et al (2016), Silva-Lehmkuhl et al (2019).…”

“…Eunotia is one of the most common and species-rich diatom genera in the Neotropics (Patrick 1940a, 1940b, Hustedt 1952a, 1952b, 1965, Sala et al 2002a, 2002b, Faustino et al 2016, Costa et al 2017, with remarkable diversity in Brazilian acidic environments (Ferrari et al 2007, Bicca et al 2011, Canani & Torgan 2013, Dunck et al 2013a, 2013b, Cavalcante et al 2014). In the state of Paraná, the genus were reported by Ludwig & Valente-Moreira (1989), Fürstenberger & Valente-Moreira (2000), Tremarin et al (2008), Faria et al (2010), Bertolli et al (2010), Santos et al (2011), Bartozek et al (2013), Marra et al (2016), Silva-Lehmkuhl et al (2019), and Bartozek et al (2020) recently proposed a new species. Based on a bibliographic check-list of freshwater diatom The purpose of the present publication was to investigate the species diversity of Eunotia from a stream located in the surrounding area of the Iguaçu National Park conservation unit.…”

Substratum‐associated microbiota

“…nov., an asymmetrical biraphid diatom. Examination of diatom biodiversity from a reservoir in Brazil documented 87 diatom taxa with a diverse representation of Eunotia Ehrenberg and the biraphid genus, Pinnularia Ehrenberg (da Silva‐Lehmkuhl, Tremarin, Vercellino, & Veiga Ludwig, 2019).…”