Update of the Brazilian floristic list of Algae and Cyanobacteria

-(Periphytic diatoms (Bacillariophyta) in streams from three Conservation Units of central Brazil: Pinnularia Ehrenberg). This study aimed to survey the genus Pinnularia Ehrenberg (Bacillariophyta) in five preserved streams located in three conservation units (Brasília National Park, Chapada dos Veadeiros National Park and Terra Ronca State Park). Periphyton was collected in different substrata during the dry and rainy seasons (years 2012 to 2013), totalizing 25 sample units. Altogether, 23 taxa were identified, being P. subanglica, P. angustivalva and P. butantanum the most frequent. Pebble and sand were the richest substrates, with nine taxa each. Among the 23 taxa reported, 13 are cited for the first time for the central Brazil: P. angusta var.

Section: Resultsmentioning

confidence: 99%

Periphytic diatoms (Bacillariophyta) in streams from three Conservation Units of central Brazil: Pinnularia Ehrenberg

França

Dunck

Rodrigues

et al. 2017

“…Specifically on the class, Bovo-Scomparin et al (2005) and Bicudo et al (2006) discussed the group taxonomy, with descriptions and illustrations of species recorded in Brazilian aquatic systems, floodplain of the Paraná River Basin and shallow reservoirs like Parque Estadual das Fontes do Ipiranga in São Paulo State, respectively. In Brazil, 28 genus, 72 species (two endemic) and four varieties were recorded (Menezes & Bicudo 2010;Menezes et al 2015). However, little is known about the ecology and dynamics of the species on this class.…”

Section: Introductionmentioning

confidence: 99%

First record and ecologic aspects of Isthmochloron neustonica Zalocar & Pizzarro (Tribophyceae) in São Paulo State, Brazil

Osti

Tucci

Camargo

2016

-(First record and ecologic aspects of Isthmochloron neustonica Zalocar & Pizzarro (Tribophyceae) in São Paulo State, Brazil). We present the morphometric characteristics of Isthmochloron neustonica populations as well as their abundance and the relationship with some environmental characteristics in a fishpond. This is the first record of the species in São Paulo State and second citation to Brazil. Isthmochloron neustonica was described in neustonic habit; in this study, with sampling for phytoplankton analysis, it was found in high density and short duration blooming (time interval up to 15 days). It represented 59% of total phytoplankton density on May 26, 2010, forming a delicate and bright film on the water surface, in an environment with high concentration of nutrients and associated with drought and low temperature. The species has a restricted range in South America, probably due to their biological characteristics, such as small cell size and neustonic habit. Few records in literature can also be one of the reasons that hampers the identification of the species in subtropical environments. Keywords: Ecology, freshwater, taxonomy RESUMO -(Primeiro registro e aspectos ecológicos de Isthmochloron neustonica Zalocar and Pizzarro (Tribophyceae) no Estado de São Paulo, Brasil). Apresentamos as características morfológicas de populações de Isthmochloron neustonica bem como, sua abundância e a relação com algumas características ambientais em tanque de piscicultura. Trata-se do primeiro registro da espécie para o Estado de São Paulo e segunda citação para o Brasil. Isthmochloron neustonica foi descrita com hábito neustônico e no presente estudo, com amostragem para análise do fitoplâncton, foi registrada com elevada densidade, caracterizando floração de curta duração (intervalo de tempo de 15 dias), representando 59% da densidade total fitoplanctônica em 26 de maio de 2010, formando sobre a superfície da água uma película delicada e brilhante, em ambiente com alta concentração de nutrientes e no período seco e baixa temperatura. A espécie apresenta distribuição geográfica restrita a América do Sul, provavelmente em função de suas características biológicas, como células de pequeno tamanho e hábito neustônico, os poucos registros na literatura, pode dificultar a identificação e o registro da espécie em ambientes subtropicais.

“…A biodiversidade em ambientes aquáticos urbanos é fortemente influenciada pela ação antropogênica associada à remoção de vegetação marginal (Hassall 2014). No país, Nogueira & Leandro-Rodrigues (1999) apresentaram um panorama sobre registro de algas em lagos urbanos em diferentes regiões geográficas e Menezes et al (2015) proporcionam um cenário de algas epicontinentais de todo o Brasil. Desse período até o presente destacam-se os artigos de Giani et al (1999), Keppeler et al (1999), Silva (1999), Ferreira & Menezes (2000), Ramírez & Bicudo (2002), Alves-da-Silva & Bridi (2004a, 2004b, Alves-da- Silva & Hahn (2001, 2004, Matsuzaki et al (2004), Ferraguiti et al (2005, Lopes et al (2005), Tucci et al (2006), Alves-da-Silva & Schüler-da-Silva (2007), Dellamano-Oliveira et al (2008), Gentil et al (2008), Nogueira et al (2008), Nogueira & Oliveira (2009), Nabout & Nogueira (2011), Rosini et al (2012) e Rosini et al (2013).…”

unclassified

Algas planctônicas flageladas e cocoides verdes de um lago no Parque Beija-Flor, Goiânia, GO, Brasil

D’Alessandro

Nogueira

2017

-(Planktonic flagellate and coccoid green algae in a lake of Parque Beija-Flor, Goiânia, Goiás State, Brazil). The public parks of Goiânia are socioenvironmentally important to the city, however, little is known about their quality and aquatic biodiversity. This study is focused on the Chlorophyceae and Trebouxiophyceae (Chlorophyta) of a lake in an urban park located in the municipality of Goiânia, Goiás State, during a short period of rainfall and drought. Weekly samplings were carried out during August 2007 and January 2008 at three sampling sites, according to the usual techniques for floristic analysis. We identified 25 infrageneric taxa: 16 Sphaeropleales, six Chlorellales, one Chlamydomonales, one Chlorococcales, and one taxon of Trebouxiophyceae of uncertain position. Pandorina morum, Lacunastrum gracillimum, Desmodesmus intermedius var. acutispinus and Pachycladella komarekii represent new records for the State of Goiás.