Pigmented Euglenophytes in a natural and shallow lake in the semiarid region of Paraíba State, Brazil

Abstract

-(Pigmented Euglenophytes in a natural and shallow lake in the semiarid region of Paraíba State, Brazil). A floristic survey of the class Euglenophyceae in Panati Lake (7°11'14" S and 36°49'52" W) is presented. The samples were collected between November 2005 and April 2007 along the margins of the lake, and a total of 29 taxa were collected, described, and illustrated, comprising 11 specifics and 18 infraspecifics, with five typical and 13 non-typical varieties. The genus Trachelomonas showed the greatest richness (13 taxa), followed by the genus Lepocinclis (seven taxa). All of the 29 taxa cataloged had been previously reported for Brazil, most with wide geographical distributions, but all were new records for Paraíba State, and 25 new for northeastern Brazil -reflecting the need for more taxonomic studies of the Euglenophyceae in these locations.

Assessment of the trophic state of the Soła River dam cascade, Polish Carpathians: a comparison of the methodology

“…Similar to the Tresna Reservoir, no large forms of Cyanobacteria were observed (e.g., from the genus Microcystis ), which would indicate the advanced eutrophication of reservoir water. In contrast, euglenins usually develop in waters that are rich in organic matter 68 , 69 . This may indicate that the reservoir periodically takes on the features of a eutrophic reservoir and of an oligotrophic reservoir because the algal characteristic of all trophic states were observed during the research season.…”

Pigmented Euglenophyceae of a lentic environment at the Upper Paraná River Floodplain, Brazil

“…Comment: This taxon is different from the typical variety as it presents an oval-expanded lorica and larger length, spines in the anterior pole and considerably larger spines in the posterior pole (Deflandre, 1926, Araujo et al, 2012. The observed specimens constitute a new record for the Upper Paraná River Floodplain.…”

Strombomonas Deflandre (Euglenophyceae) em ambientes aquáticos na Área de Proteção Ambiental do Ibirapuitã, Estado do Rio Grande do Sul, Brasil

“…Quanto à temperatura da água muitos espécimes de Strombomonas podem ser considerados como euritérmicos, por ocorrerem em amplitude de temperatura superior a 10º C, sendo alguns estenotérmicos (Alves-da- Silva & Bridi 2004, Alvesda-Silva & Bicudo 2006. Segundo Alves-da- Silva & Torres (1994), Alvesda- Silva & Bridi (2004), Alves-da- Silva & Bicudo (2006), Araújo et al (2012) Hamm (1969), condições já encontradas por Conforti & Pérez (2000) e Alves-da- Silva et al (2007Silva et al ( , 2013a em estudos abrangendo Strombomonas, embora espécies do gênero já tenham sido registradas em águas com a alta concentração de matéria orgânica (Cecy 1990, Zuberlin et al 2004, Domingues & Torgan 2011.…”

“…Quanto ao hábitat ocorrem predominantemente na comunidade fitoplanctônica, mas podem ser encontradas no benton e perifíton, em ambientes dulciaquícolas rasos, lóticos e lênticos como: rios com fluxo lento, margens de ilhas, lagoas, lagos, açudes, reservatórios, banhados, viveiro de peixes e em corpos de água estagnada e efêmeras (Rino 1972, Tell & Conforti 1986, Philipose 1988, Xavier 1988, Menezes & Fernandes 1989, Menezes 1992, Alves-da-Silva & Torres, 1994, Xavier 1994, Alves-da-Silva & Ávila 1997, Wolowski 1998, Alvesda-Silva & Crossetti 1999, Alves-da-Silva & Bicudo 2003, 2006, Wolowski & Walne 2007, Araújo et al 2012, Alves-da-Silva et al 2013a, b, Duangjan & Wołowski 2013. Alguns autores como Alves-da- Silva & Bicudo (2003), Conforti & Zalocar (2003), Salazar (2004) Silva et al 2007, 2013a, b, 2015, Domingues & Torgan 2011, sendo este o maior número de táxons dessas microalgas registradas no Brasil.…”