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| Monteiro,José Juarez Ferreira; Leça,Enide Eskinazi; Koening,Maria Luise; Macedo,Silvio José de. |
| This study reports the first occurrence of Trichodesmiumthiebautii Gomont ex Gomont on the coast of northeastern Brazil. Samples were gathered during the rainy season (July 2005) and the dry season (November 2006) at six stations distributed along two perpendicular profiles of the coast of Pernambuco (8º18'S - 34º56'W and 8º32'S - 35º00'W). T. thiebautii was found during both periods of the year and at the six collection stations, forming colonies in the form of clusters or more rarely, bundles, with straight cylindrical trichomes, quadratic or slightly longer cells, with widths between 5-10 µm and heights of 3-15 µm. The hydrological variables presented small variations, contributing to wide distribution of the species. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Taxonomic characters; Annual variation; Spatial variation; Pernambuco. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062010000400027 |
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| Souza,Giane Soares de; Koening,Maria Luise; Leça,Enide Eskinazi; Coêlho,Maria de Pompéia Correia de A.. |
| O trabalho apresenta o levantamento da diatomoflórula identificada em sedimentos do Quaternário da Lagoa das Diatomáceas (Dois Irmãos, Recife), baseado em um testemunho de sondagem com 4,5 m, tendo sido analisadas amostras com intervalos de 10 em 10 cm. Foram identificados 46 táxons, distribuídos em 19 gêneros, 40 espécies e seis variedades. A coluna estratigráfica esteve composta por gêneros epífitos (Actinella, Amphora, Cocconeis Eunotia, Fragilaria, Frustulia, Gomphonema e Rhopalodia), bentônicos (Navicula, Neidium, Nitzschia e Surirella) e planctônicos (Aulacoseira, Cyclotella e Skeletonema). A maioria das espécies é oligoalóbia e litoral, destacando-se em termos de freqüência e abundância: Actinella brasiliensis, Anomoeoneis serians, Eunotia... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Diatomáceas; Quaternário; Fóssil; Estratigrafia. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062007000300002 |
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| Moura Junior,Alfredo Matos; Bezerra Neto,Egídio; Koening,Maria Luise; Leça,Enide Eskinazi. |
| The purpose of this study was to determine the chemical composition of Chaetoceros gracilis, Cylindrotheca closterium and Tetraselmis gracilis, species frequently used as food for aquaculture in the northeast of Brazil. The species were grown in f/2 medium, in carboys, aerated from one liter, with constant illumination and analyses were made in late exponential growth phase. Cellular density (8,447 x 10 6 cell.L-1), soluble carbohydrates (0.10±0.01 mg.L-1) and magnesium (14.78±0.08 mg.L-1) were the highest in C. gracilis. C . closterium had the highest amount of chlorophyll a (13.76±1.11 mg.L-1), soluble proteins (0.62±0.04 mg.L-1), total amino acids (23.82±0.84 mg .L-1), nitrate (0.36±0.02 mg.L-1), sodium (0.46±0.05 mg.L-1) and phosphorus (2.80±0.38... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Chaetoceros gracilis; Cylindrotheca closterium; Tetraselmis gracilis; Chemical composition. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132007000300012 |
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| Koening,Maria Luise; Leça,Enide Eskinazi; Neumann-Leitão,Sigrid; Macêdo,Silvio José de. |
| In order to address the impact on phytoplankton, sampling was conducted monthly at 4 fixed stations, from April/86 to March/87 at diurnal low and high tide using a plankton net (65 mum mesh size) and a 1 L Van Dorn bottle. Among the 133 taxa identified, marine littoral euryhaline species were most common, outranking Gyrosigma balticum (Ehrenberg) Rabenhorst, Nitzschia sigma (Kützing) Wm. Smith, Licmophora abbreviata Agardh, Climacosphenia moniligera Ehrenberg, Surirella febigerii Lewis, Terpsinoe musica Ehrenberg and Cylindrotheca closterium (Ehrenberg) Reiman and Lewis. The port construction caused significant changes to the phytoplankton community with a strong influence of marine species (mainly dinoflagellate) because of the opening of the reef near... |
| Tipo: Info:eu-repo/semantics/report |
Palavras-chave: Phytoplankton; Environmental impacts; Estuary; Suape Port. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132003000100012 |
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