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	Provedor de dados Acta Botanica (2) Biota Neotropica (1) Autor Wojciechowski,Juliana (3) Fernandes,Luciano Felício (2) Burda,Tamires Marcela (1) Cavalcante,Kaoli Pereira (1) Costa,Elaine Aparecida Dias da (1) Fonseca,Fernanda Vitória Buck (1) Ludwig,Thelma Alvim Veiga (1) Scheer,Mauricio Bergamini (1) Tremarin,Priscila Izabel (1) de Azevedo Tibiriçá,Carlos Eduardo Junqueira (1) de Castro,Emanuela Cristina (1) Mais... Palavra-chave Chlorophytes (1) Cyanobacteria (1) Cyanobacteria blooms (1) Cylindrospermopsis (1) Diatom (1) Diatoms (1) Eunotiaceae (1) Experiments (1) Light intensities (1) Lotic systems (1) Macrophytes (1) Mechanical removal (1) Morpho-physiological responses (1) Periphyton (1) Phytoplankton (1) Reservoir management (1) Southern Brazil (1) Subtropical (1) Taxonomy (1) Mais... Tipo do documento Info:eu-repo/semantics/article (3) Ano 2018 (1) 2016 (1) 2014 (1) País Brazil (3) Idioma Inglês (3)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 3 Primeira ... 1 ... Última Potential effects of mechanically removing macrophytes on the phytoplankton community of a subtropical reservoir Acta Botanica Wojciechowski,Juliana; Burda,Tamires Marcela; Scheer,Mauricio Bergamini; Costa,Elaine Aparecida Dias da; Fernandes,Luciano Felício. ABSTRACT Intensive growth of aquatic macrophytes interferes with water quality and ecosystem dynamics worldwide. Although mechanically removing macrophytes is the most commonly used method for their eradication, it can also cause undesirable disturbances in aquatic reservoir communities. We performed laboratory incubations of phytoplankton sampled before and after macrophytes were mechanically removed from the Piraquara II reservoir, South Brazil. We analyzed changes in growth and composition of the main phytoplankton groups with respect to nutrient shifting. Prior to removing the macrophytes, the phytoplankton community was dominated by low cell abundances of diatoms and flagellates. In contrast, growth rates of cyanobacteria (mainly Cylindrospermopsis... Tipo: Info:eu-repo/semantics/article Palavras-chave: Chlorophytes; Cyanobacteria; Diatoms; Macrophytes; Mechanical removal; Phytoplankton; Reservoir management. Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062018000400588 Morpho-physiological responses of a subtropical strain of Cylindrospermopsis raciborskii (Cyanobacteria) to different light intensities Acta Botanica Wojciechowski,Juliana; Fernandes,Luciano Felício; Fonseca,Fernanda Vitória Buck. ABSTRACT The toxigenic cyanobacterium Cylindrospermopsis raciborskii previously restricted to tropical latitudes, has been increasingly reported in temperate lakes in recent decades. The causes of its biogeographical expansion are under investigation, but efficient physiological adaptation to changes in temperature and light regimes are likely to be involved. The present study evaluated the morpho-physiological responses of a strain of C. raciborskii from southern Brazil to nine light intensities, from 9 to 250 µmol photons m-2 s-1. Blooms of this cyanobacterium are regularly recorded in the region. Morpho-physiological responses were measured based on growth rate and trichome length. Cylindrospermopsis raciborskii showed slow growth at low light... Tipo: Info:eu-repo/semantics/article Palavras-chave: Cylindrospermopsis; Cyanobacteria blooms; Experiments; Light intensities; Morpho-physiological responses; Southern Brazil; Subtropical. Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062016000200232 Epiphytic Eunotia (Bacillariophyceae) on Podostemum from Santa Catarina, southern Brazil, including new observations on morphology and taxonomy of some rare recorded species Biota Neotropica Cavalcante,Kaoli Pereira; Tremarin,Priscila Izabel; de Castro,Emanuela Cristina; de Azevedo Tibiriçá,Carlos Eduardo Junqueira; Wojciechowski,Juliana; Ludwig,Thelma Alvim Veiga. Eunotia is a highly diverse diatom genus in the Neotropics. Considerable morphological variability of the valve showed in several species of the genus resulted in a quite confused taxonomy. Twelve Eunotiataxa attached to Podostemum spp. were investigated using the light microscopy (LM). Additionally, scanning electron microscopy (SEM) was used in order to investigate the fine morphology of most abundant taxa. Samples were collected from four rivers from the State of Santa Catarina between March 2009 and July 2010. The freshwater diatom flora from this south Brazilian state is poorly known in relation to its neighboring states. Eunotia biseriatoides has intermediate features betweenEunotia and Perinotia, and the circumscription of these genera is discussed... Tipo: Info:eu-repo/semantics/article Palavras-chave: Diatom; Eunotiaceae; Lotic systems; Periphyton; Taxonomy. Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032014000300119 Registros recuperados: 3 Primeira ... 1 ... Última

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