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Registros recuperados: 9
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Alimentação de Limnoperna fortunei (Dunker 1857): taxas de filtração com ênfase ao uso de Cyanobacteria- DOI: 10.4025/actascibiolsci.v26i4.1523 Biological Sciences
Ruckert, Gabriela Von; CETEC; Campos, Mônica de Cassia Souza; CETEC; Rolla, Maria Edith; CETEC.
Limnoperna fortunei é uma espécie invasora na América do Sul que, devido ao seu crescimento excessivo, tornou-se um sério problema para o ambiente e para os setores usuários de água bruta. L. fortunei é um molusco filtrador que se alimenta de fitoplâncton e outras partículas suspensas. Moluscos filtradores são grandes bioacumuladores de toxinas. Desta forma, L. fortunei apresenta um potencial de bioacumulação e transferência na cadeia trófica de cianotoxinas. Neste estudo, experimentos in vitro demonstraram que L. fortunei é capaz de alimentar-se de espécies de Cyanobacteria potencialmente tóxicas, Microcystis viridis e Pseudanabaena sp. As taxas de filtração foram 17,20 e 24,52mL.mgPS-1.h-1, respectivamente, sendo similares à encontrada para a Chlorophyta...
Palavras-chave: 2.01.00.00-0 Biologia Geral Limnoperna fortunei; Espécie invasora; Taxa de filtração; Cyanobacteria; Microcystis; Pseudanabena; Selenastrum 2.01.00.00-0 Biologia Geral.
Ano: 2004 URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/1523
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Bioacumulation of cyanotoxins in Hypophthalmichthys molitrix (Silver Carp) in Paranoá Lake, Brasilia-DF, Brazil. Repositório Alice
OLIVEIRA, N. B.; SCHWARTZ, C. A.; BLOCH JUNIOR, C.; PAULINO, L.; PIRES JÚNIOR, O. R..
bitstream/item/179854/1/Oliveira2013-Article-BioacumulationOfCyanotoxinsInH.pdf
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Cyanotoxin; Silver carps; Paranoá Lake; Hypophthalmichthys Molitrix; Cyanobacteria; Microcystis.
Ano: 2013 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/975029
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Cianobactérias planctônicas de um lago artificial urbano na cidade de Goiânia, GO Rev. Bras. Bot.
Nogueira,Ina de Souza; Gama Júnior,Watson Arantes; D'Alessandro,Emmanuel Bezerra.
Os criatórios de peixe do estado de Goiás são inúmeros e de intensa atividade recreativa. No entanto, estudos sobre as cianobactérias nesses ambientes são escassos, fato preocupante, uma vez que é comum notar-se intensa proliferação do fitoplâncton em pesqueiros, principalmente devido a ações antrópicas. O perigo consiste na formação de florações de espécies potencialmente tóxicas, principalmente de cianobactérias. Este trabalho visa inventariar as espécies planctônicas de cianobactérias ocorrentes em um pesqueiro (lago Jaó - um lago artificial raso) da área municipal de Goiânia (GO) (16º39'13" S-49º13'26" O). As amostragens foram realizadas nos períodos de seca (2003 a 2008) e chuva (2009), quando visualmente era evidente a ocorrência de florações. Foram...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Aphanocapsa; Dolichospermum; Microcystis; Pesqueiro.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042011000400011
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Effects of nutritional conditions on lipid production by cyanobacteria Anais da ABC (AABC)
CORDEIRO,RAQUEL S.; VAZ,IZABELA C.D.; MAGALHÃES,SÉRGIA M.S.; BARBOSA,FRANCISCO A.R..
ABSTRACT The present study evaluated the effects of the culturing media and the levels of nitrogen and phosphorus on the growth, biomass productivity and lipid production of four species of Microcystis (M. novacekii, M. aeruginosa, M panniformis and M. protocystis). The lipid extract was obtained by refluxing with dichloromethane (Soxhlet). The biomass and biomass productivity yields were maximized with ASM-1 medium treatment enriched with nitrogen and/or phosphorus (0.25-0.65 g/L and 25-50.7 mg/L d-1, respectively). The lipid extract yields from M. panniformis and M. novacekii were inversely correlated with the concentration of nitrogen and directly correlated with the concentration of phosphorus (35.8 % and 31.7 %). The lipid extract yield from M....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Biodiesel; Culture media; Lipid extraction; Microcystis; Nitrogen and phosphorus deprivation and Stress..
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000502021
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Genetic polymorphism in brazilian microcystis spp. (Cyanobacteria) toxic and non-toxic through RFLP-PCR of the cpcBA-IGS BABT
Bittencourt-Oliveira,Maria do Carmo; Cunha,Maristela Casé Costa; Moura,Ariadne do Nascimento.
The escalating occurrence of cyanobacterial toxic blooms demands a better understanding of genetic variability as an auxiliary expedient in species identification, collaborating with the monitoring of water destined to public supply. This study aimed at the unraveling of genetic polymorphism in the toxic and nontoxic strains of Microcystis (Cyanobacteria) species, isolated from diverse Brazilian localities through the RFLP-PCR technique applied to the c-phycocyanin encoding operon and its intergenic spacer (cpcBA-IGS). Eighteen strains belonging to M. aeruginosa, M. panniformis, M. protocystis and M. wesenbergii, plus two other unidentified strains, were analyzed by means of the morphological and molecular data. The molecular data constituted three groups...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cyanobacteria; CpcBA-IGS; Genetic polymorphism; Microcystin; Microcystis; RFLP.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132009000400014
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Influence of temperature and nutrient content on lipid production in freshwater microalgae cultures Anais da ABC (AABC)
BOHNENBERGER,JULIANA E.; CROSSETTI,LUCIANE O..
The production of biomass by microalgae is considered a clean alternative compared to other plant crops that require large areas for cultivation and that generate environmental impacts. This study evaluated the influence of temperature and nutrients on lipid contents of cultured species of freshwater microalgae, with a view toward using these lipids for biodiesel production. Two strains of Monoraphidium contortum, a culture containing Chlorella vulgaris and Desmodesmus quadricauda and another strain of Microcystis aeruginosa were maintained in the laboratory for six days, in five culture media: modified ASM-1 (control, with high concentrations of phosphate and nitrate; phosphorus-deficient; non-limiting phosphate; nitrogen-deficient; and non-limiting...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Energy biomass; Monoraphidium; Chlorella; Desmodesmus; Microcystis; Lipid accumulation.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652014000301239
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Physiological and Metabolic Responses of Freshwater and Brackish-Water Strains of Microcystis aeruginosa Acclimated to a Salinity Gradient: Insight into Salt Tolerance ArchiMer
Georges Des Aulnois, Maxime; Roux, Pauline; Caruana, Amandine; Réveillon, Damien; Briand, Enora; Hervé, Fabienne; Savar, Veronique; Bormans, Myriam; Amzil, Zouher; Atomi, Haruyuki.
Proliferation of microcystin (MC)-producing Microcystis aeruginosa in brackish waters has been described in several locations and represents a new concern for public and environmental health. While the impact of a sudden salinity increase on M. aeruginosa physiology has been studied, less is known about the mechanisms involved in salt tolerance after acclimation. This study aims to compare the physiological responses of two strains of M. aeruginosa (PCC 7820 and PCC 7806), which were isolated from contrasted environments, to increasing salinities. After acclimation, growth and MC production rates were determined and metabolomic analyses were conducted. For both strains, salinity decreased the biovolume, growth, and MC production rates and induced the...
Tipo: Text Palavras-chave: Acclimation; Metabolomic; Microcystis; Salinity; Sucrose; Trehalose; Ecophysiology.
Ano: 2019 URL: https://archimer.ifremer.fr/doc/00588/70031/68012.pdf
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Preliminary studies on primary productivity in the Winam Bay of L. Victoria OceanDocs
Kibaara, D..
In 1984, water temperature and pH in the Winam Bay fluctuated little between the months. At any given time, the difference between surface and bottom temperature did not exceed 1.6 C. Secchi disc visibilities were persistently low during the year with a maximum value of 0.71 m. Oxygen concentrations within the water column fell sharply below 1.5m. The highest primary productivity by algae measured was 1.26g at 1200 hours. Microcystis was the most abundant algae encountered in the lake water.
Tipo: Journal Contribution Palavras-chave: Microcystis; Africa Victoria L. Primary production Water temperature data Oxygen Algae Primary production http://aims.fao.org/aos/agrovoc/c_34329.
Ano: 1986 URL: http://hdl.handle.net/1834/1213
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Some limnological characteristics of the lower Sondu-Miriu River, Kenya OceanDocs
Mwashote, B.M.; Shimbira, W..
Chemical and physical investigations of water on a 10 km section of the Sondu-Miriu river in Kenya were conducted in 1988-1990. They revealed no significant spatial variation between three sampling stations. Variation existed between the waters of a floodpool and the river. Flooding had a general diluting effect on the nutrients. All the physical and chemical parameters investigated were within tolerable limits of water quality according to WHO criteria for drinking water, fisheries and other aquatic life. A total of 22 phytoplankton and 9 zooplankton genera were recorded. The algae Microcystis (cyanobacteria) and Navicula (diatom) were dominant. Mean densities were 283 cells or colonies per ml for phytoplankters and...
Tipo: Proceedings Paper Palavras-chave: Chemical limnology; Microcystis; Navicula Absorption spectra Physical oceanography Phytoplankton Population density Species diversity Turbidity Physical oceanography Phytoplankton Turbidity Nutrients Population density Species diversity http://aims.fao.org/aos/agrovoc/c_5830 http://aims.fao.org/aos/agrovoc/c_13344 http://aims.fao.org/aos/agrovoc/c_15043 http://aims.fao.org/aos/agrovoc/c_5274 http://aims.fao.org/aos/agrovoc/c_6112 http://aims.fao.org/aos/agrovoc/c_33954.
Ano: 1994 URL: http://hdl.handle.net/1834/1177
Registros recuperados: 9
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