Planktonic cyanobacteria from a tropical reservoir of southeastern Brazil: a picocyanobacteria rich community and new approaches for its characterization

Laux, Marcele; Werner, Vera Regina; Vialle, Ricardo Assunção; Ortega, Josè Miguel; Giani, Alessandra

doi:10.1127/nova_hedwigia/2018/0467

Cited by 6 publications

(2 citation statements)

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“…Geographic distribution -The data referring to the geographic distribution of species in Brazil were based on Werner et al (2015a), and complemented with the publications of Rodrigues and Bicudo (2001), Fonseca andRodrigues (2005), Sant'Anna et al (2011), Alcântara et al (2011), Felisberto and Souza (2014), Werner et al (2015b), Moura et al (2017), Laux et al (2018), Rangel et al (2018).…”

Section: Methodsmentioning

confidence: 99%

“…According to McGregor (2013), it is a cosmopolitan species reported from meso-eutrophic reservoirs throughout the temperate zones. Although the species was originally described from planktic freshwater material of a temperate area (Börringesjön lake -Sweden), its presence has already been recorded in different aquatic biotopes of tropical and subtropical climates throughout the world (e.g., Joosten 2006;Sant'Anna et al 2007;Delazari-Barroso et al 2007;McGregor 2013;Werner et al 2015b;Laux et al 2018). According to Komárek and Anagnostidis (1998), the species was also found in bays of the Baltic Sea.…”

Section: Taxamentioning

confidence: 99%

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Cyanobacteria from a Brazilian subtropical freshwater water body

2018

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Due to the undeniable importance of the role that cyanobacteria play in different ecosystems, and the new discoveries and periodic changes in their taxonomic classification, the main objective of this research was a taxonomic update of the cyanobacteria recorded in an artificial, subtropical freshwater water body. This work also aimed at the knowledge of the geographic distribution and frequency of the species throughout the study period. The analyzed pond (called Basin 7) is located in an environmental preservation area called Braskem Environmental Station (29°51 0 57.3 00 S and 51°21 0 54.7 00 W), which is part of the ''green belt'' that surrounds the set of companies of the Southern Petrochemical Complex of Rio Grande do Sul state (Brazil). The studied samples were taken from May 2000 to December 2015, using a plankton net (30 lm), and floating thallus of cyanobacteria were collected directly by hand. Thirty-three species were identified and distributed in the orders Oscillatoriales (14), Synechococcales (12), Chroococcales (6) and Spirulinales (1). Phormidium Kützing ex Gomont presented the highest species richness, with five species identified, and P. tergestinum (Kützing) Anagnostidis & Komárek was the one with the highest frequency of occurrence (81.3%). Among the identified species, seven are especially important for being potentially toxic. Eucapsis pseudalpina Komárek & Hindák also stood out for its first recorded occurrence in Brazil, and Ancylothrix rivularis Martins & Branco, Arthrospira jenneri Stizenberger ex Gomont and Pannus cf. brasiliensis Malone et al. for their first recorded occurrence in Rio Grande do Sul state. For each species, diagnoses, basionyms and synonyms when appropriate, illustrations and comments are presented.

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