Chlorococcales (exceto Scenedesmaceae) de pesqueiros da Região Metropolitana de São Paulo, SP, Brasil: levantamento florístico

Abstract

-(Chlorococcales (except Scenedesmaceae) from fi shing ponds in the Metropolitan Region of São Paulo, São Paulo State, Brazil: a fl oristic survey). Studies in fi shing ponds have mainly focused on economic issues and environmental impacts, while studies on the fl ora of micro algae are rarely performed. Therefore, the objective of this study was to perform a survey of the Chlorococcales from ten fi shing ponds located in the Metropolitan Region of São Paulo. We identifi ed 38 taxa, distributed in eight families, 19 genera and four varieties that are not typical of the species. With the exception of Scenedesmaceae, Chlorellaceae and Coelastraceae had the greatest number of taxa, 10 and eight species respectively, while Micractiniaceae, Radiococcaceae and Treubariaceae had the lowest numbers of taxa and frequencies of occurrence. Dictyosphaerium pulchellum was the only species with 90% frequency of occurrence. Out of the 38 taxa identifi ed, 19 had a frequency of occurrence between 30-55%, indicating a greater distribution of these species among the studied fi shing ponds, corroborating the information in the literature, which argue that the Chlorococcales, Chlorophyceae species are well distributed in different Brazilians aquatic systems. The Scenedesmaceae family will be addressed separately due to its high wealth of taxa. Key words: biodiversity, Dictyosphaerium, taxonomic RESUMO -(Chlorococcales (exceto Scenedesmaceae) de pesqueiros da Região Metropolitana de São Paulo, SP, Brasil: levantamento fl orístico). Estudos em pesqueiros ressaltam, principalmente, questões econômicas e de impactos ambientais, enquanto que, estudos sobre a fl ora de microalgas raramente são realizados. Assim, o objetivo deste estudo foi realizar o levantamento das Chlorococcales em dez pesqueiros da Região Metropolitana de São Paulo. Foram identifi cados 38 táxons, distribuídos em oito famílias, 19 gêneros e quatro variedades que não as típicas das espécies. Com exceção de Scenedesmaceae, Chlorellaceae e Coelastraceae apresentaram maior riqueza, 10 e oito espécies respectivamente, enquanto que, Micractiniaceae, Radiococcaceae e Treubariaceae apresentaram as menores riquezas e as menores frequências de ocorrência. Dictyosphaerium pulchellum foi a única espécie com 90% de frequência de ocorrência. Dos 38 táxons identifi cados, 19 apresentaram frequência de ocorrência entre 30-55%, indicando melhor distribuição dessas espécies entre os pesqueiros estudados, corroborando com as informações da literatura, que discutem que várias espécies de Chlorococcales, Chlorophyceae são bem distribuídas entre os diferentes sistemas aquáticos brasileiros. A família Scenedesmaceae, pela elevada riqueza de táxons, será abordada separadamente.

Planktonic Microalgae in Recreational Fishponds of the Crato Municipality, Ceará State, Brazil

“…Also they are considered important components of the phytoplankton community, as they are very representative in its composition. Similar results were found in studies on Chlorococcales in ten fishponds in the São Paulo metropolitan area, as recorded by Rosini et al (2012); family Scenedesmaceae showed the highest number of taxa (26), while genera Desmodesmus and Scenedesmus had the largest number of species.…”

Alpha and beta diversity of phytoplankton in two subtropical eutrophic streams in southern Brazil

“…Identification to genus and species were performed using the specialized works of Komárek & Fott (1983), Sant' Anna (1984), Nogueira (1991), Comas (1996), Godinho (2009), Godinho et al (2010), Rodrigues et at. (2010), Rosini et al (2012;2013a), and Ramos et al (2012) for green algae; Hüber-Pestalozzi (1955), Tell & Conforti (1986), and Menezes (1994) for Euglenophyceae; Castro et al (1991), and Menezes (1994) for Cryptophyceae; Komár-ková- Legnerová & Cronberg (1994), Azevedo et al (1996), Azevedo & Sant' Anna (1999;, Komárek & Azevedo (2000), Sant' Anna et al (2004), and Rosini et al (2013b) for Cyanobacteria; Krammer & Lange-Bertalot (1986;1991), Metzeltin &Lange-Bertalot (1998;2007), and Metzeltin et al (2005) for Bacillariophyceae; Sant ' Anna et al (1989), Ferragut et al (2005, Tucci et al (2006), and Sant' for the overall community. Updating of the taxonomy followed An et al (1999), Hegewald (1997;2000), Hegewald & Hanagata (2000), , Krienitz et al (2003), Buchheim et al (2005), and Krienitz & Bock (2012).…”

Chlorococcales sensu latu (Chlorophyceae) de um ecossistema lótico subtropical, estado do Paraná, Brasil

“…De acordo com Rosini et al (2012), P. duplex var. gracillimum difere da variedade típica da espécie pelo formato das células.…”