Nanoplankton
Mostrando 1-9 de 9 artigos, teses e dissertações.
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1. Auto- and heterotrophic nanoplankton and filamentous bacteria of Guanabara Bay (RJ, Brazil): estimates of cell/filament numbers versus carbon content
Variações do nanoplâncton (2-20µm) e bactérias filamentosas (diâmetro: 0.5-2.0 µm) da Baía de Guanabara (RJ, Brasil) são apresentadas, considerando densidade celular e biomassa de autótrofos e heterótrofos. A meta deste trabalho é contribuir para uma futura modelagem da dinâmica trófica neste sistema. Amostras subsuperficiais de água foram col
Brazilian Journal of Oceanography. Publicado em: 2007-06
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2. Componentes estruturais abiótico e biótico e caracterização do grau de trofia de gamboas do litoral sul do Paraná, Brasil.
xi Estudos relacionados com a qualidade da água em ambientes costeiros como baías, estuários e gamboas são importantes por serem regiões de alta produtividade e influenciadas por atividades antrópicas. Neste estudo foram avaliadas variáveis físicoquímicas e biológicas em diversas gamboas ao longo da costa do Estado do Paraná. Foram analisadas vari
Publicado em: 2006
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3. 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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4. Technique for Enumeration of Heterotrophic and Phototrophic Nanoplankton, Using Epifluorescence Microscopy, and Comparison with Other Procedures †
A new method is described that uses the fluorochrome primulin and epifluorescence microscopy for the enumeration of heterotrophic and phototrophic nanoplankton (2 to 20 μm). Phototrophic microorganisms are distinguished from heterotrophs by the red autofluorescence of chlorophyll a. Separate filter sets are used which allow visualization of the primulin-sta
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5. Use of Inorganic Membrane Filters (Anopore) for Epifluorescence and Scanning Electron Microscopy of Nanoplankton and Picoplankton †
Inorganic membrane filters (Anopore) were examined qualitatively by epifluorescence and scanning electron microscopy to determine their suitability for the study of nanoplankton and picoplankton. Compared with filters currently used, the Anopore filters allowed for increased resolution of the specimen with epifluorescence microscopy because of filter flatnes
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6. Experimental Tests of Nutrient Limitation in Freshwater Picoplankton
On the basis of correlative studies, picoplankton in Calder Lake, New York, are apparently unaffected by seasonal fluxes in nutrient (N and P) levels. In this small eutrophic lake, picoplankton (<2.0- to 0.2-μm size) and nanoplankton (<20 to >2 μm) predominate. Microplankton (>20 μm) are typically least important. Experiments were conducted in situ to tes
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7. Spatial Distribution, Structure, Biomass, and Physiology of Microbial Assemblages across the Southern Ocean Frontal Zones during the Late Austral Winter
We examined the spatial distributions of picoplankton, nanoplankton, and microplankton biomass and physiological state relative to the hydrography of the Southern Ocean along 90° W longitude and across the Drake Passage in the late austral winter. The eastern South Pacific Ocean showed some large-scale biogeographical differences and size class variability.
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8. Measurement of marine picoplankton cell size by using a cooled, charge-coupled device camera with image-analyzed fluorescence microscopy.
Accurate measurement of the biomass and size distribution of picoplankton cells (0.2 to 2.0 microns) is paramount in characterizing their contribution to the oceanic food web and global biogeochemical cycling. Image-analyzed fluorescence microscopy, usually based on video camera technology, allows detailed measurements of individual cells to be taken. The ap
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9. Development and field application of a quantitative method for examining natural assemblages of protists with oligonucleotide probes.
A fluorescent in situ hybridization method that uses rRNA-targeted oligonucleotide probes for counting protists in cultures and environmental water samples is described. Filtration, hybridization, and enumeration of fixed cells with biotinylated eukaryote-specific probes and fluorescein isothiocyanate-conjugated avidin were performed directly on 0.4-microns-