Periphytic Cosmarium (Zygnematophyceae, Desmidiaceae) in lentic environments of the Upper Paraná River floodplain: Taxonomy and ecological aspects

Abstract

Aim A taxonomic study of the species of the genus Cosmarium Corda ex Ralfs (Desmidiaceae) was conducted in two lentic environments of the Upper Paraná River Floodplain (Garças and Patos lakes). Methods The samples were collected in November 2016. Two petioles of Eichhornia azurea (Sw) Kunth were sampled and analyzed qualitatively. Results Six species, nine varieties, and three forms were identified, with five taxa being common to both lakes, nine in Garças Lake, and four in Patos Lake. Of this, thirteen species represent the first records for the floodplain environment. Conclusion This study contributes to the knowledge of the biodiversity of this region, providing support for future ecological studies and biomonitoring.

Periphytic algal flora of the low Doce river, Espírito Santo State, Brazil, after ore tailings flow, 1: smooth cell walled Cosmarium Corda (Zygnematophyceae, Desmidiaceae.

“…Over 600 Cosmarium taxa were recorded for Brazil (Biolo & Bicudo 2018), and the genus was more intensively studied in the south region where numerous taxonomic studies revealed its presence in both phytoplankton and periphyton of reservoirs and rivers. Recent floristic studies recording the presence of Cosmarium in Brazil include States such as Paraná (Silva & Cecy 2004, Bortolini et al 2010, Felisberto & Rodrigues 2010, Biolo et al 2013, Menezes et al 2011, Carvalho et al 2015, Aquino et al 2016, Osório et al 2018, Rodrigues & Moresco 2021), São Paulo (Bicudo et al 2019, Felisberto & Rodrigues 2010, Bahia (Oliveira et al 2010, Oliveira et al 2011, Oliveira et al 2016, Ramos et al 2018, Ramos et al 2021, Goiás (Felisberto & Rodrigues 2004), Distrito Federal (Estrela et al 2011), Amazonas (Saturnino et al 2020), Sergipe (Burle et al 2020), Mato Grosso and Rio de Janeiro (Kanetsuna 2004). Furthermore, in the last 10 years five new species of Cosmarium were described based on Brazilian material: Cosmarium bahianum G.J.P.…”

Periphytic algal flora of the low Doce river, Espírito Santo State, Brazil, after ore tailings flow, 1: smooth cell walled Cosmarium Corda (Zygnematophyceae, Desmidiaceae

“…Over 600 Cosmarium taxa were recorded for Brazil (Biolo & Bicudo 2018), and the genus was more intensively studied in the south region where numerous taxonomic studies revealed its presence in both phytoplankton and periphyton of reservoirs and rivers. Recent floristic studies recording the presence of Cosmarium in Brazil include States such as Paraná (Silva & Cecy 2004, Bortolini et al 2010, Felisberto & Rodrigues 2010, Biolo et al 2013, Menezes et al 2011, Carvalho et al 2015, Aquino et al 2016, Osório et al 2018, Rodrigues & Moresco 2021), São Paulo (Bicudo et al 2019, Felisberto & Rodrigues 2010, Bahia (Oliveira et al 2010, Oliveira et al 2011, Oliveira et al 2016, Ramos et al 2018, Ramos et al 2021, Goiás (Felisberto & Rodrigues 2004), Distrito Federal (Estrela et al 2011), Amazonas (Saturnino et al 2020), Sergipe (Burle et al 2020), Mato Grosso and Rio de Janeiro (Kanetsuna 2004). Furthermore, in the last 10 years five new species of Cosmarium were described based on Brazilian material: Cosmarium bahianum G.J.P.…”