Oligotrophic
Mostrando 25-36 de 152 artigos, teses e dissertações.
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25. Flora diatomácea do reservatório Cabuçu, Município de Guarulhos, SP: taxonomia e aplicação como indicadores geoambientais
The present work carried out in the Cabuçu Lake, in the city of Guarulhos State of São Paulo. Brazil identified and catalogued the 63 species diatoms. The more representative diatoms found attached on aquatic plants, in all samples, were Cyclotella meneghiniana, C. stelligera, Eunotia pectinalis, E. formica, E. monodon, Pinnularia braunii, P. dactylus, P.
Publicado em: 2007
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26. Limnological characterization and compartimentation of Ponte Nova Reservoir High Tietê River, São Paulo, Brazil - a contribution to management / "Caracterização limnológica e compartimentação do reservatório de Ponte Nova, Alto Tiête, SP - uma contribuição ao seu manejo"
Ponte Nova Reservoir is a component of SABESP?s Sistema Produtor Alto Tietê, with Jundiaí Taiaçupeba, Paraitinga e Biritiba-Mirim reservoirs. The system is responsible for the water supply of part of the Região Metropolitana de São Paulo. The aim of the present study was to verify the reservoir spatial and temporal behavior of the limnological variables
Publicado em: 2007
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27. Demanda química de oxigênio, clorofila a e comunidade fitoplanctônica como indicadores da qualidade da água no Canal do Pataxó/RN
The current study examined spatial-temporal modifications and water quality through chemical and biotic indicators during both dry (January, February and November 2006) and wet seasons (March to June 2006). This study was carried out in Armando Ribeiro Gonçalves Reservoir, RN, Canal do Pataxó and after the water station treatment (WST). The physical-chemic
Publicado em: 2007
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28. Variação espacial e temporal da comunidade fitoplanctônica da Lagoa Bonita, DF
The Distrito Federal has few natural lagoons. Between them distinguishes the Lagoa Bonita located in Estação Ecológica de Águas Emendadas (15 32 to 15 38 S and 47 33 to 47 37 W). The objective of this work was to analyse the structure and dynamics of the phytoplankton community of Lagoa Bonita considering its spatial and temporal variation. The phytoplan
Publicado em: 2007
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29. Caracterização limnológica e análise de comunidades bentônicas sujeitas à invasão por espécies exóticas, em lagos do Vale do Rio Doce, MG, Brasil / Limnological characterization and analysis of benthic communities subject to the invasion by exotic species in Rio Doce Valley lakes, MG, Brazil
Benthic macroinvertebrates are important components of aquatic ecosystems due to their role in the energy flow and material cycling. They have gradually received more attention in ecological studies in the last decades. The present study aimed a comparative limnological characterization of four lakes belonging to the middle Rio Doce Valley lacustrine system,
Publicado em: 2006
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30. Relações tróficas e limnológicas no reservatório de Itaipu: uma análise do impacto da biomassa pesqueira nas comunidades planctônicas / Trophic and limnological interactions in the Itaipu reservoir: an analysis of the impact of the fishing biomass in the planktonic communities
Many experimental studies contributed for the development of the theory of the lacustrine food web, disclosing the important paper of the fish, for decades ignored by the limnology. These studies, in its majority, had been developed in Europe and North America and the generality of the hypotheses supporting the theory was not tested yet in subtropical and tr
Publicado em: 2006
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31. Water level influences on body condition of Geophagus brasiliensis (Perciformes: Cichlidae) in a Brazilian oligotrophic reservoir
Efeitos do nível da água na condição de Geophagus brasiliensis foram analisados em um reservatório oligotrófico. A condição fisiológica (K) e o índice gonadossomático (IGS) foram comparados entre os níveis da água (baixo e alto). Melhores condições de fêmeas foram associadas a maiores disponibilidades de recursos no nível alto, já que o des
Neotropical Ichthyology. Publicado em: 2004-09
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32. "Graus de trofia em corpos d água do estado de São Paulo: avaliação dos métodos de monitoramento." / Trophic Status in São Paulo State water bodies evaluation of monitoring methodologies.
Data from 1996 to 2001, from CETESBs Surface Water Monitoring Program for the State of São Paulo, amounting to 69 sampling sites, (35 located in rivers and 34 in reservoirs)was gathered, and analyzed for chlorophyll a, nutrients and other variables used on the evaluation of the trophic status, through a modified Carlsons Trophic State Index (TSI), (Tole
Publicado em: 2004
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33. Diversidade dos Cyclopoida (Copepoda, Crustácea) de água doce do estado de São Paulo: taxonomia, ecologia e genética.
In the present work, the diversity of the Copepoda Cyclopoida from Sao Paulo State was studied. Samples of zooplankton were collected along with water samples were collected in 22 Hydrographic Management Units (UHGRH) of the State. Different environments, such as Reservoirs, Ponds, and Rivers were sampled totalizing 207 water bodies. All of them were positio
Publicado em: 2003
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34. Compostos orgânicos em sedimentos marinhos: uma viagem ao fundo do Oceano Atlântico Norte
The present study investigates the origin and distribution of several classes of organic compounds present in recently deposited abyssal sediments in the North East Atlantic Ocean. Six cores were sampled (multicorer) along 20ºW longitude as part of the UK's Biogeochemical Ocean Flux Study (BOFS). The sediments underlie diverse water columns, ranging from th
Química Nova. Publicado em: 2002-09
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35. PRODUCAO PRIMARIA E SUAS RELACOES COM ALGUNS FATORES FISICO-QUIMICOS EM RESERVATORIOS DO ESTADO DE SAO PAULO. / Primary production of Santos Bay, Sao Paulo state: aspects of the photosynthetic efficiency in a polluted environment
The present work is part of a 1argeT project entited "Typo1ogy of Reservoirs of the State of São Paulo". It was sponsored by FAPESP (Fundação de Amparo à Pesquisa do Estado de São Paulo - State Foundation for Research Support), and included the study of 52 reservoirs. For the present study, ten reservois were sampled four times during 1979. Seven of the
Publicado em: 1981
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36. Oligotrophic bacteria isolated from clinical materials.
Oligotrophic bacteria (oligotrophs) are microorganisms that grow in extremely nutritionally deficient conditions in which the concentrations of organic substances are low. Many oligotrophic bacteria were isolated from clinical materials including urine, sputum, swabbings of the throat, vaginal discharges, and others. Seventy-seven strains of oligotrophic bac